diff --git a/.gitignore b/.gitignore
index 5dbc419..c2b63a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,9 @@
 # Cowork session backups
 backup/
 
+# Cowork agent instructions
+AGENTS.md
+
 # OS / editor cruft
 .DS_Store
 Thumbs.db
diff --git a/assets/css/table.css b/assets/css/table.css
index c868abf..e4ccb30 100644
--- a/assets/css/table.css
+++ b/assets/css/table.css
@@ -554,6 +554,71 @@
   color: #4a3420;
 }
 
+/* ── POPUP OPEN/CLOSE ANIMATION ─────────────────────────────────────────
+   The popup mounts/unmounts instantly in JS, so we animate it via a
+   scale + fade keyframe anchored to the arrow tip (transform-origin).
+   Above-the-target: origin is bottom-center. Below: top-center.        */
+@keyframes popup-open {
+  from { opacity: 0; transform: translateX(-50%) translateY(-100%) scaleY(0.6); }
+  to   { opacity: 1; transform: translateX(-50%) translateY(-100%) scaleY(1);   }
+}
+@keyframes popup-open-below {
+  from { opacity: 0; transform: translateX(-50%) scaleY(0.6); }
+  to   { opacity: 1; transform: translateX(-50%) scaleY(1);   }
+}
+
+.col-info-popup:not(.col-info-popup--below) {
+  transform-origin: bottom center;
+  animation: popup-open 0.22s cubic-bezier(0.34, 1.4, 0.64, 1) both;
+}
+.col-info-popup.col-info-popup--below {
+  transform-origin: top center;
+  animation: popup-open-below 0.22s cubic-bezier(0.34, 1.4, 0.64, 1) both;
+}
+
+/* ── EVENT TAG POPUP — SLIDESHOW ────────────────────────────────────────
+   The stage holds the current slide. On transition, evTransition is set
+   to 'exiting' (fade out) then 'entering' (fade in) via the hook.      */
+@keyframes ev-fade-in  { from { opacity: 0; } to { opacity: 1; } }
+@keyframes ev-fade-out { from { opacity: 1; } to { opacity: 0; } }
+
+.ev-popup-stage {
+  transition: opacity 0.38s ease;
+}
+.ev-popup-entering {
+  animation: ev-fade-in  0.38s ease both;
+}
+.ev-popup-exiting {
+  animation: ev-fade-out 0.38s ease both;
+}
+
+/* Slideshow navigation dots */
+.ev-popup-dots {
+  display: flex;
+  gap: 5px;
+  margin-top: 8px;
+  justify-content: center;
+  align-items: center;
+}
+.ev-popup-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: #c9b08a;
+  opacity: 0.4;
+  cursor: pointer;
+  transition: opacity 0.2s, transform 0.2s;
+  flex-shrink: 0;
+}
+.ev-popup-dot.active {
+  opacity: 1;
+  transform: scale(1.35);
+  background: #7a5530;
+}
+.ev-popup-dot:hover {
+  opacity: 0.75;
+}
+
 
 /* ── 8. NOW-ROW & NIGHT-ROW DECORATIONS ─────────────────────────────── */
 
diff --git a/assets/css/ui.css b/assets/css/ui.css
index c479062..9a82f8c 100644
--- a/assets/css/ui.css
+++ b/assets/css/ui.css
@@ -5,24 +5,62 @@
 /* ── EVENT BANNER ───────────────────────────────────────────────────── */
 /* Animated slide-down banner for cosmic/weather/promo events.           */
 
+/* Open/close: grow vertically using grid-template-rows (silky smooth,
+   no max-height hack — it animates from 0fr → 1fr and back).           */
 .event-banner-wrap {
+  display: grid;
+  grid-template-rows: 0fr;
+  transition: grid-template-rows 0.45s cubic-bezier(0.4, 0, 0.2, 1);
+}
+.event-banner-wrap > * {
   overflow: hidden;
-  max-height: 0;
-  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
 }
 .event-banner-wrap.visible {
-  max-height: 120px;
+  grid-template-rows: 1fr;
 }
+/* When closing, fade the content out before the row collapses */
+.event-banner-wrap:not(.visible) .event-banner-stage {
+  opacity: 0;
+}
+
+/* Slide crossfade: both banners rendered simultaneously, fading into each other */
+@keyframes banner-fade-in {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+@keyframes banner-fade-out {
+  from { opacity: 1; }
+  to   { opacity: 0; }
+}
+
+/* Container that holds both slides during a crossfade */
+/* Also fades in/out with the wrap open/close */
+.event-banner-stage {
+  opacity: 1;
+  transition: opacity 0.35s ease;
+  position: relative;
+  margin-bottom: 12px;
+}
+
 .event-banner {
   display: flex;
   align-items: center;
   gap: 14px;
   padding: 13px 18px;
   border-radius: 4px;
-  margin-bottom: 12px;
   position: relative;
   border-left: 4px solid rgba(255,255,255,0.25);
 }
+
+/* Single-element crossfade — content swaps during the transition gap */
+.event-banner.banner-exiting {
+  animation: banner-fade-out 0.4s ease both;
+  pointer-events: none;
+}
+
+.event-banner.banner-entering {
+  animation: banner-fade-in 0.4s ease both;
+}
 .event-banner-emoji {
   font-size: 24px;
   flex-shrink: 0;
@@ -85,12 +123,12 @@
   opacity: 0.75;
 }
 
-/* Cell tag — tiny event icon in the hour column */
+/* Cell tag — event icon in the hour column */
 .event-cell-tag {
-  font-size: 11px;
+  font-size: 15px;
   line-height: 1;
   vertical-align: middle;
-  margin-left: 3px;
+  margin-left: 1px;
   display: inline-block;
   cursor: pointer;
   border-radius: 3px;
@@ -236,10 +274,6 @@
 
 /* ── EVENT BANNER — mobile fixes ────────────────────────────────────── */
 @media (max-width: 640px) {
-  .event-banner-wrap.visible {
-    max-height: 260px;           /* generous — banner can be tall with dates line */
-  }
-
   .event-banner-wrap {
     margin-top: 8px;             /* push banner clear of the fixed nav bar */
     margin-bottom: 18px;         /* breathing room between banner and header */
diff --git a/assets/js/app.js b/assets/js/app.js
index 1e9c370..31db63e 100644
--- a/assets/js/app.js
+++ b/assets/js/app.js
@@ -21,17 +21,26 @@
 // ════════════════════════════════════════════════════════════════════════
 
 import { h, render, Fragment } from '../vendor/preact.js';
-import { useState, useEffect, useLayoutEffect, useRef } from '../vendor/preact-hooks.js';
+import { useState, useEffect, useRef, useCallback } from '../vendor/preact-hooks.js';
 import htm from '../vendor/htm.js';
-import { vaporPressureHpa, solarElevationDeg, calcTmrt, utciApprox, calcConcreteTemp, calcVehicleInteriorTemp, calcIndoorTempPass, calcManagedIndoorTempPass } from './physics.js';
 import {
-  utciCategory, precipPenalty, windCompass8, uvSplit,
+  utciCategory,
   SKIN_TYPES, sunburnMinutes, burnLabel,
   VEHICLE_TYPES, BUILDING_TYPES,
-  cloudCategory, confidenceBand, moonGlyph,
+  confidenceBand, moonGlyph,
 } from './utils.js';
 import { SkyScope, WindVane, CloudIcon, ScopeReticle, PrecipIcon, CustomSelect, VentPill } from './components.js';
 import { getActiveEvents, getLensEvent, getCellTagEvents, getUpcomingEvents } from './events.js';
+import {
+  FREE_DAYS, FILTER_PROFILES, OUTDOORS_VARIANTS, POLLEN_TYPES,
+  profileButtonOrder, variantIcons,
+  activityVariantKeys, placeVariantKeys,
+  COL_DESCRIPTIONS,
+} from './config.js';
+import { buildHourlyRows } from './compute.js';
+import { useForecast } from './hooks/useForecast.js';
+import { useColumnPopup } from './hooks/useColumnPopup.js';
+import { useTableScroll } from './hooks/useTableScroll.js';
 
 const html = htm.bind(h);
 
@@ -57,15 +66,14 @@ export function UTCIForecast() {
     setLocation(loc);
   };
 
-  const [forecast, setForecast] = useState(null);     // raw Open-Meteo response
-  const [airQuality, setAirQuality] = useState(null); // raw Open-Meteo air quality response
-  const [loading, setLoading]   = useState(false);    // true while fetching
-  const [error, setError]       = useState(null);     // fetch error message
+  // Forecast data is owned by useForecast — it fetches on location change,
+  // auto-refreshes every 5 minutes, and exposes the air-quality side data too.
+  const { forecast, airQuality, loading, error, now } = useForecast(location);
+
   const [searchQuery, setSearchQuery]   = useState('');     // text in the search box
   const [searchResults, setSearchResults] = useState([]);   // geocoding dropdown
   const [searching, setSearching]       = useState(false);  // search-in-flight flag
   const [selectedDay, setSelectedDay]   = useState(0);      // which day tab is active
-  const [now, setNow]                   = useState(new Date()); // ticks every 5 min
   const [proPromptDay, setProPromptDay] = useState(null);   // locked day clicked → show upsell card
   const [proPromptSource, setProPromptSource] = useState('day'); // 'day' | 'custom'
 
@@ -135,64 +143,7 @@ export function UTCIForecast() {
     return localStorage.getItem('sunscope_pro') === '1';
   });
 
-  // How many days the free tier shows. Days beyond this get a 🔒.
-  // Bump this number if you want to give free users more access.
-  const FREE_DAYS = 3;
-
-  // Filter profile presets — each preset defines which columns are visible
-  // when that profile is selected.
-  const FILTER_PROFILES = {
-    basic: {
-      label: 'Basic',
-      icon: '🌡️',
-      cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true, aqi: false, pollen: false },
-    },
-    home: {
-      label: 'Home',
-      icon: '🏠',
-      cols: { hour: true, air: true, rh: true, dew: true, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: false, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: true, managedT: true, vis: false, aqi: true, pollen: true },
-    },
-    vehicle: {
-      label: 'Vehicle',
-      icon: '🚗',
-      cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: false, soilT6: false, soilM: true, concreteT: false, vehicleT: true, indoorT: false, managedT: false, vis: true, aqi: false, pollen: false },
-    },
-    farming: {
-      label: 'Farming',
-      icon: '🌾',
-      cols: { hour: true, air: true, rh: true, dew: true, wind: true, dir: true, cloud: true, sun: true, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: true, soilT6: true, soilM: true, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: true, pollen: true },
-    },
-    outdoors: {
-      label: 'Places',
-      icon: '🌤️',
-      // Default cols match the first variant (urban). Switching variant updates visibleCols.
-      cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true, uvB: false, burn: true, utciP: true, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: true, vehicleT: false, indoorT: false, managedT: false, vis: true, aqi: true, pollen: false },
-    },
-    alltemps: {
-      label: 'Temps',
-      icon: '🌡️',
-      proOnly: true,
-      cols: { hour: true, air: true, rh: false, dew: false, wind: false, dir: false, cloud: false, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: false, soilT: true, soilT6: false, soilM: false, concreteT: true, vehicleT: true, indoorT: true, managedT: true, vis: false, aqi: false, pollen: false },
-    },
-    custom: {
-      label: 'Custom',
-      icon: '⚙️',
-      proOnly: true,
-      cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: false, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: false, pollen: false },
-    },
-  };
-
-  // Places sub-variants — each has its own column set.
-  // Selecting a variant applies its cols to visibleCols.
-  const OUTDOORS_VARIANTS = {
-    urban:    { name: 'Urban',         cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: true,  vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: true,  pollen: false } },
-    beach:    { name: 'Beach',         cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: true,  cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: true,  burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
-    events:   { name: 'Events',        cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: true,  vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: false, pollen: true  } },
-    festival: { name: 'Festival', proOnly: true, cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: true,  concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: true,  pollen: true  } },
-    wintersports: { name: 'Winter Sports', proOnly: true, cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: true,  burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
-    naturist:     { name: 'Naturist', proOnly: true, cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: false, cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: true,  uvA: true,  uvB: true,  burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: true,  pollen: true  } },
-    sailing:      { name: 'Sailing',  proOnly: true, cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: true,  cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
-  };
+  // (FREE_DAYS, FILTER_PROFILES and OUTDOORS_VARIANTS now live in ./config.js.)
 
   // Current active filter profile
   const [activeProfile, setActiveProfile] = useState('basic');
@@ -231,16 +182,8 @@ export function UTCIForecast() {
     setPollenType(v);
   };
 
-  // Pollen type options shown in the pulldown selector.
-  const POLLEN_TYPES = {
-    all_pollen:     { name: 'All pollen',     unit: 'grains/m³' },
-    grass_pollen:   { name: 'Grass pollen',   unit: 'grains/m³' },
-    birch_pollen:   { name: 'Birch pollen',   unit: 'grains/m³' },
-    alder_pollen:   { name: 'Alder pollen',   unit: 'grains/m³' },
-    mugwort_pollen: { name: 'Mugwort pollen', unit: 'grains/m³' },
-    olive_pollen:   { name: 'Olive pollen',   unit: 'grains/m³' },
-    ragweed_pollen: { name: 'Ragweed pollen', unit: 'grains/m³' },
-  };
+  // (POLLEN_TYPES now lives in ./config.js.)
+
   const searchTimeout = useRef(null);
 
   const activateProfile = (key) => {
@@ -254,18 +197,9 @@ export function UTCIForecast() {
     }
   };
 
-  const profileButtonOrder = ['basic', 'home', 'vehicle', 'alltemps', 'custom'];
-  const variantIcons = {
-    urban: '🏙️',
-    beach: '🏖️',
-    events: '🎪',
-    festival: '⛺',
-    sailing: '⛵',
-    wintersports: '🎿',
-    naturist: '☀️',
-  };
-  const activityVariantKeys = ['sailing', 'wintersports', 'naturist'];
-  const placeVariantKeys = ['urban', 'beach', 'events', 'festival'];
+  // (profileButtonOrder, variantIcons, activityVariantKeys,
+  // placeVariantKeys now live in ./config.js.)
+
   const activityOptions = [
     {
       value: 'farming',
@@ -286,6 +220,13 @@ export function UTCIForecast() {
       label: `${variantIcons[k]} ${v.name}${v.proOnly && !isPro ? ' 🔒' : ''}`,
     };
   });
+  // activeCols: the effective column set for the current profile/variant.
+  // Use this everywhere instead of FILTER_PROFILES[activeProfile].cols so that
+  // outdoors variants each get their own cols rather than the generic outdoors cols.
+  const activeCols = activeProfile === 'outdoors'
+    ? (OUTDOORS_VARIANTS[outdoorsVariant]?.cols ?? FILTER_PROFILES.outdoors.cols)
+    : (FILTER_PROFILES[activeProfile]?.cols ?? FILTER_PROFILES.basic.cols);
+
   const activityValue = activeProfile === 'farming'
     ? 'farming'
     : activeProfile === 'outdoors' && activityVariantKeys.includes(outdoorsVariant)
@@ -309,374 +250,41 @@ export function UTCIForecast() {
   const bodyTableRef   = useRef(null);
   const tableWrapRef   = useRef(null);
 
-  // ─── COLUMN HEADER POPUP ─────────────────────────────────────────────
-  // Clicking a <th> shows a small description popup below it.
-  // State holds { key, x, y } or null when closed.
-  const [colPopup, setColPopup] = useState(null);
-  const colPopupRef   = useRef(null);
-  const colPopupThRef = useRef(null);
-  const hoverTimerRef = useRef(null);
-  const closeTimerRef = useRef(null);
+  // ─── COLUMN HEADER & EVENT TAG POPUPS ────────────────────────────────
+  // All popup state + handlers live in the useColumnPopup hook. The JSX
+  // wires up the th cells and event-tag spans with the handlers returned
+  // here, and reads colPopup / eventTagPopup to know when to render the
+  // floating panel.
+  const {
+    colPopup, colPopupRef,
+    handleThClick, handleThEnter, handleThLeave,
+    handlePopupEnter, handlePopupLeave,
+    eventTagPopup, eventTagPopupRef,
+    evSlideIndex, evTransition, evSlideTo,
+    handleEventTagClick, handleEventTagEnter, handleEventTagLeave,
+    handleEventTagPopupEnter, handleEventTagPopupLeave,
+    closePopup, closeEventTagPopup,
+  } = useColumnPopup();
 
-  // Event tag popup — same behaviour as column popups but for cell emoji icons.
-  const [eventTagPopup, setEventTagPopup] = useState(null); // { ev, x, y, arrowLeft, below }
-  const eventTagPopupRef  = useRef(null);
-  const evHoverTimerRef   = useRef(null);
-  const evCloseTimerRef   = useRef(null);
+  // (COL_DESCRIPTIONS, calcPopupPos and all the popup handlers now live in
+  // ./config.js and ./hooks/useColumnPopup.js respectively.)
 
-  const openEventTagPopup = (ev, spanEl) => {
-    const rect = spanEl.getBoundingClientRect();
-    const popupW = 260, popupH = 80, margin = 8, gap = 6;
-    let x = rect.left + rect.width / 2;
-    x = Math.max(popupW / 2 + margin, Math.min(x, window.innerWidth - popupW / 2 - margin));
-    const below = rect.top < popupH + gap + margin;
-    const y = below ? rect.bottom + gap : rect.top - gap;
-    const popupLeft = x - popupW / 2;
-    const arrowLeft = Math.max(16, Math.min(rect.left + rect.width / 2 - popupLeft, popupW - 16));
-    setEventTagPopup({ ev, x, y, arrowLeft, below });
-  };
-
-  const closeEventTagPopup = () => {
-    setEventTagPopup(null);
-    clearTimeout(evHoverTimerRef.current);
-    clearTimeout(evCloseTimerRef.current);
-  };
-
-  const handleEventTagClick = (ev, e) => {
-    e.stopPropagation();
-    clearTimeout(evHoverTimerRef.current);
-    clearTimeout(evCloseTimerRef.current);
-    if (eventTagPopup?.ev?.id === ev.id) { closeEventTagPopup(); return; }
-    openEventTagPopup(ev, e.currentTarget);
-  };
-
-  const handleEventTagEnter = (ev, e) => {
-    clearTimeout(evHoverTimerRef.current);
-    clearTimeout(evCloseTimerRef.current);
-    if (eventTagPopup?.ev?.id === ev.id) return;
-    const spanEl = e.currentTarget;
-    evHoverTimerRef.current = setTimeout(() => openEventTagPopup(ev, spanEl), 700);
-  };
-
-  const handleEventTagLeave = () => clearTimeout(evHoverTimerRef.current);
-
-  const handleEventTagPopupEnter = () => clearTimeout(evCloseTimerRef.current);
-  const handleEventTagPopupLeave = () => { evCloseTimerRef.current = setTimeout(closeEventTagPopup, 200); };
-
-  useEffect(() => {
-    if (!eventTagPopup) return;
-    const onClickOutside = (e) => {
-      if (eventTagPopupRef.current && !eventTagPopupRef.current.contains(e.target)) closeEventTagPopup();
-    };
-    const onScrollOrResize = () => closeEventTagPopup();
-    document.addEventListener('mousedown', onClickOutside);
-    window.addEventListener('scroll', onScrollOrResize, { passive: true, capture: true });
-    window.addEventListener('resize', onScrollOrResize, { passive: true });
-    return () => {
-      document.removeEventListener('mousedown', onClickOutside);
-      window.removeEventListener('scroll', onScrollOrResize, { capture: true });
-      window.removeEventListener('resize', onScrollOrResize);
-    };
-  }, [eventTagPopup]);
-
-  const COL_DESCRIPTIONS = {
-    hour:      { title: 'Hour',             desc: 'Local wall-clock time for this forecast row. Each row covers one hour.' },
-    air:       { title: 'Air Temperature',  desc: 'Measured air temperature at 2 m above the ground. This is the standard thermometer reading — it does not account for sun, wind, or humidity.' },
-    rh:        { title: 'Relative Humidity', desc: 'How much moisture the air holds relative to its maximum capacity at that temperature. High RH makes warm days feel stickier and cold days feel rawer.' },
-    dew:       { title: 'Dew Point',        desc: 'The temperature at which air becomes saturated and moisture begins to condense. A useful measure of absolute humidity — above 16 °C it starts to feel muggy; above 21 °C it feels oppressive.' },
-    wind:      { title: 'Wind Speed',       desc: 'Mean wind speed at 10 m, with peak gust in brackets where significantly higher. Wind dramatically increases heat loss from exposed skin — the basis of wind chill.' },
-    dir:       { title: 'Wind Direction',   desc: 'The compass direction the wind is blowing from, shown as an arrow and abbreviated label (e.g. SW = south-westerly).' },
-    cloud:     { title: 'Cloud Cover',      desc: 'Total cloud cover as a percentage of the sky. High cloud blocks solar radiation and reduces both daytime heating and overnight cooling.' },
-    sun:       { title: 'Sun Elevation',    desc: 'The angle of the sun above the horizon in degrees. Below 0° the sun has set. The higher the elevation, the more intense the solar radiation reaching the ground.' },
-    direct:    { title: 'Direct Radiation', desc: 'Shortwave solar radiation arriving in a direct beam from the sun (W/m²). The primary driver of skin heating on sunny days.' },
-    diffuse:   { title: 'Diffuse Radiation', desc: 'Scattered solar radiation arriving from all directions across the sky (W/m²). Present even under cloud; contributes to overall solar load.' },
-    tmrt:      { title: 'Mean Radiant Temp', desc: 'The temperature a person\'s skin "sees" from all surrounding surfaces and the sun combined. Can exceed air temperature by 20–30 °C on a sunny day — this is why shade feels so much cooler.' },
-    delta:     { title: 'UTCI − Air Delta', desc: 'The difference between the UTCI felt temperature and the plain air temperature. A large positive value means solar radiation is adding significant heat stress beyond what the thermometer shows.' },
-    utci:      { title: 'UTCI',             desc: 'Universal Thermal Climate Index — the raw felt temperature combining air temp, humidity, wind, and solar radiation. Does not include precipitation effects.' },
-    uvA:       { title: 'UV-A Index',       desc: 'Estimated UV-A radiation index. UV-A penetrates deeper into the skin and contributes to long-term ageing and some skin cancers, even through glass.' },
-    uvB:       { title: 'UV-B Index',       desc: 'Estimated UV-B radiation index. UV-B causes sunburn and is the main driver of vitamin D production. Intensity depends strongly on solar elevation and cloud cover.' },
-    burn:      { title: 'Burn Time',        desc: 'Estimated time to reach one Minimal Erythemal Dose (MED) — the threshold for sunburn — based on the UV index and your selected skin type. This is a guide, not a medical measurement.' },
-    utciP:     { title: 'UTCI+P',           desc: 'SunScope\'s adjusted felt temperature: UTCI plus the soak-factor penalty for precipitation. Rain and snow on wet clothing can reduce the felt temperature by up to 8 °C.' },
-    precip:    { title: 'Precipitation',    desc: 'Expected rainfall or snowfall in mm per hour. Snow is shown in cm. Even light drizzle meaningfully reduces felt temperature when combined with wind.' },
-    soilT:     { title: 'Soil Temperature', desc: 'Temperature of the soil at the surface (0 cm depth). Useful for planting decisions — most seeds germinate above 7–10 °C.' },
-    soilT6:    { title: 'Soil Temp 6 cm',   desc: 'Temperature of the soil at 6 cm depth, the root zone for many crops and seedlings. Lags behind surface temperature by several hours.' },
-    soilM:     { title: 'Soil Moisture',    desc: 'Volumetric water content of the top 1 cm of soil (m³/m³). Values above 0.4 suggest saturated ground; below 0.2 indicates dry conditions.' },
-    concreteT: { title: 'Concrete Surface', desc: 'Estimated temperature of sun-exposed urban concrete or paving. Concrete absorbs more solar energy than grass and cannot cool itself through evaporation — surface temps can run 15–25 °C above air temperature on sunny days.' },
-    vehicleT:  { title: 'Vehicle Interior', desc: 'Estimated ambient cabin temperature inside a parked vehicle. Cars heat rapidly through thin body panels and glass; motorhomes and caravans are modelled as insulated occupied living spaces with retained warmth, lower glass gain, and slower heat response. Dangerous for children and pets above 35 °C; potentially fatal above 45 °C.' },
-    indoorT:   { title: 'Indoors',          desc: 'Estimated ambient temperature inside a selected building type with windows closed and no air conditioning. Accounts for retained warmth, window solar gain, internal gains, and thermal lag without repeatedly accumulating solar heat hour after hour.' },
-    managedT:  { title: 'Managed Indoors',  desc: 'Estimated indoor temperature with curtains closed and windows opened when outdoor air is cooler than inside — the standard UK heatwave advice. Curtains block most direct solar gain; smart ventilation pulls the temperature down during cooler periods.' },
-    vis:       { title: 'Visibility',       desc: 'Horizontal visibility in kilometres, sourced from the CAMS air quality model. Values below 1 km indicate fog or very thick haze; below 10 km suggests mist, smoke, or significant pollution. Relevant for driving, flying, and photography.' },
-    aqi:       { title: 'Air Quality Index', desc: 'European Air Quality Index (0–100+), combining PM2.5, PM10, ozone, nitrogen dioxide, and sulphur dioxide. 0–20 = Good; 20–40 = Fair; 40–60 = Moderate; 60–80 = Poor; 80–100 = Very Poor; 100+ = Extremely Poor. Sourced from Copernicus CAMS.' },
-    pollen:    { title: 'Pollen',           desc: 'Pollen concentration in grains per cubic metre for the selected pollen type, sourced from the Copernicus CAMS pollen forecast. Low = <10; Moderate = 10–50; High = 50–200; Very High = 200+. Values vary by species and season.' },
-  };
-
-  const calcPopupPos = (thEl) => {
-    const rect = thEl.getBoundingClientRect();
-    const popupW = 260, popupH = 110, margin = 8, gap = 6;
-    let x = rect.left + rect.width / 2;
-    x = Math.max(popupW / 2 + margin, Math.min(x, window.innerWidth - popupW / 2 - margin));
-    const below = rect.top < popupH + gap + margin;
-    const y = below ? rect.bottom + gap : rect.top - gap;
-    const popupLeft = x - popupW / 2;
-    const arrowLeft = Math.max(16, Math.min(rect.left + rect.width / 2 - popupLeft, popupW - 16));
-    return { x, y, arrowLeft, below };
-  };
-
-  const openPopup = (key, thEl) => {
-    colPopupThRef.current = thEl;
-    setColPopup({ key, ...calcPopupPos(thEl) });
-  };
-
-  const closePopup = () => {
-    setColPopup(null);
-    colPopupThRef.current = null;
-    clearTimeout(hoverTimerRef.current);
-    clearTimeout(closeTimerRef.current);
-  };
-
-  const handleThClick = (key, e) => {
-    clearTimeout(hoverTimerRef.current);
-    clearTimeout(closeTimerRef.current);
-    if (colPopup?.key === key) { closePopup(); return; }
-    openPopup(key, e.currentTarget);
-  };
-
-  const handleThEnter = (key, e) => {
-    clearTimeout(hoverTimerRef.current);
-    clearTimeout(closeTimerRef.current);
-    // If a different popup is open, close it immediately and start fresh timer
-    if (colPopup && colPopup.key !== key) closePopup();
-    if (colPopup?.key === key) return; // already showing this one
-    const thEl = e.currentTarget;
-    hoverTimerRef.current = setTimeout(() => openPopup(key, thEl), 1000);
-  };
-
-  // Leaving a th: just cancel the pending open. Don't auto-close —
-  // the user might be moving into the popup, or just passing through.
-  const handleThLeave = () => {
-    clearTimeout(hoverTimerRef.current);
-  };
-
-  // Popup mouse handlers: keep it open while hovering, close on leave.
-  const handlePopupEnter = () => clearTimeout(closeTimerRef.current);
-  const handlePopupLeave = () => { closeTimerRef.current = setTimeout(closePopup, 200); };
-
-  useEffect(() => {
-    if (!colPopup) return;
-    const onClickOutside = (e) => {
-      if (colPopupRef.current && !colPopupRef.current.contains(e.target)) closePopup();
-    };
-    // Close on scroll (avoids scroll-linked jank) or resize
-    const onScrollOrResize = () => closePopup();
-    document.addEventListener('mousedown', onClickOutside);
-    window.addEventListener('scroll', onScrollOrResize, { passive: true, capture: true });
-    window.addEventListener('resize', onScrollOrResize, { passive: true });
-    return () => {
-      document.removeEventListener('mousedown', onClickOutside);
-      window.removeEventListener('scroll', onScrollOrResize, { capture: true });
-      window.removeEventListener('resize', onScrollOrResize);
-    };
-  }, [colPopup]);
-
-  // ─── TABLE SCROLL INDICATORS ─────────────────────────────────────────
-  // Track whether the body scroller can scroll left/right so we can show
-  // fade + chevron indicators on the table edges.
-  const [tableCanScrollLeft,  setTableCanScrollLeft]  = useState(false);
-  const [tableCanScrollRight, setTableCanScrollRight] = useState(false);
-
-  const updateTableScrollIndicators = () => {
-    const el = bodyScrollRef.current;
-    if (!el) return;
-    setTableCanScrollLeft(el.scrollLeft > 1);
-    setTableCanScrollRight(el.scrollLeft + el.clientWidth < el.scrollWidth - 1);
-  };
-
-  // ─── DRAG-TO-SCROLL ──────────────────────────────────────────────────
-  // Attach pointer-event drag scrolling to the body scroller so desktop
-  // users can click-drag the table horizontally.
-  useEffect(() => {
-    const el = bodyScrollRef.current;
-    if (!el) return;
-    let isDown = false;
-    let startX = 0;
-    let startScroll = 0;
-
-    const onMouseDown = (e) => {
-      // Only act on clicks that land inside the body scroller
-      if (!el.contains(e.target)) return;
-      if (e.button !== 0) return;
-      if (e.target.closest('button, a, input, select')) return;
-      isDown = true;
-      startX = e.clientX;
-      startScroll = el.scrollLeft;
-      el.style.cursor = 'grabbing';
-      document.body.style.userSelect = 'none';
-      document.body.style.webkitUserSelect = 'none';
-    };
-    const onMouseMove = (e) => {
-      if (!isDown) return;
-      const dx = e.clientX - startX;
-      el.scrollLeft = startScroll - dx;
-    };
-    const onMouseUp = () => {
-      if (!isDown) return;
-      isDown = false;
-      el.style.cursor = '';
-      document.body.style.userSelect = '';
-      document.body.style.webkitUserSelect = '';
-    };
-
-    // Attach everything to document so Preact's synthetic event system
-    // cannot intercept or swallow the events before we see them.
-    document.addEventListener('mousedown', onMouseDown);
-    document.addEventListener('mousemove', onMouseMove);
-    document.addEventListener('mouseup',   onMouseUp);
-
-    // Also update indicators on scroll
-    el.addEventListener('scroll', updateTableScrollIndicators);
-
-    return () => {
-      document.removeEventListener('mousedown', onMouseDown);
-      document.removeEventListener('mousemove', onMouseMove);
-      document.removeEventListener('mouseup',   onMouseUp);
-      el.removeEventListener('scroll', updateTableScrollIndicators);
-    };
-  }, [forecast]);
-
-  // Update indicators after layout sync (columns may have changed width)
-  useEffect(() => {
-    updateTableScrollIndicators();
-  }, [forecast, visibleCols, selectedDay]);
-
-  // ─── TABLE SCROLL SYNC ───────────────────────────────────────────────
-  // The hourly table is rendered as two stacked scroll areas:
-  //   • Sticky header strip (locked to viewport top, clipped)
-  //   • Body scroller (overflow-x: auto — owns the horizontal scrollbar)
-  // We need to (a) keep the header track shifted horizontally to match
-  // the body's scrollLeft, and (b) keep the header cells the same pixel
-  // width as the body cells even as columns toggle or the window resizes.
-  // ─────────────────────────────────────────────────────────────────────
-  const handleBodyScroll = () => {
-    const track = headTrackRef.current;
-    const body  = bodyScrollRef.current;
-    if (!track || !body) return;
-    track.style.transform = `translate3d(${-body.scrollLeft}px, 0, 0)`;
-    updateTableScrollIndicators();
-  };
-
-  useLayoutEffect(() => {
-    // Synchronise the head and body table column widths with a
-    // "shrink-to-fit then distribute" strategy:
-    //   • Measure each column's true natural (content-fit) width by
-    //     temporarily switching both tables to table-layout: auto +
-    //     width: max-content. White-space: nowrap on cells stops content
-    //     from wrapping, so the measurement is the smallest width that
-    //     won't clip the content.
-    //   • If the body scroller has spare horizontal space (natural total
-    //     < container width), scale every column up proportionally to
-    //     fill it — so toggling columns off makes the remaining ones fan
-    //     out instead of leaving an awkward gap.
-    //   • Otherwise apply the natural widths as-is and let the body
-    //     scroller's overflow-x: auto produce a horizontal scrollbar.
-    const sync = () => {
-      const headTable  = headTableRef.current;
-      const bodyTable  = bodyTableRef.current;
-      const bodyScroll = bodyScrollRef.current;
-      if (!headTable || !bodyTable || !bodyScroll) return;
-      const bodyRow = bodyTable.querySelector('tbody tr');
-      const headRow = headTable.querySelector('thead tr');
-      if (!bodyRow || !headRow) return;
-      const headCells = Array.from(headRow.children);
-      const bodyCells = Array.from(bodyRow.children);
-      const n = Math.min(headCells.length, bodyCells.length);
-      if (n === 0) return;
-
-      // Step 1: clear any previously-forced cell widths and switch the
-      // tables to natural sizing so the measurement reflects the true
-      // content-fit width — independent of how wide the container is.
-      headCells.forEach(c => { c.style.width = ''; c.style.minWidth = ''; c.style.maxWidth = ''; });
-      bodyCells.forEach(c => { c.style.width = ''; c.style.minWidth = ''; c.style.maxWidth = ''; });
-      headTable.style.width = 'max-content';
-      bodyTable.style.width = 'max-content';
-      headTable.style.tableLayout = 'auto';
-      bodyTable.style.tableLayout = 'auto';
-
-      // Step 2: read each cell's natural width. getBoundingClientRect
-      // forces synchronous layout — that's what we want.
-      const naturalW = new Array(n);
-      let naturalTotal = 0;
-      for (let i = 0; i < n; i++) {
-        const headW = headCells[i].getBoundingClientRect().width;
-        const bodyW = bodyCells[i].getBoundingClientRect().width;
-        const w = Math.max(Math.ceil(headW), Math.ceil(bodyW));
-        naturalW[i] = w;
-        naturalTotal += w;
-      }
-
-      // Step 3: decide final widths based on available container width.
-      const containerW = bodyScroll.clientWidth;
-      const finalW = new Array(n);
-      let totalWidth;
-      if (naturalTotal > 0 && naturalTotal < containerW) {
-        // Spare space — distribute proportionally across columns so they
-        // fan out to fill the scroller (no awkward right-hand gap).
-        const scale = containerW / naturalTotal;
-        let running = 0;
-        for (let i = 0; i < n - 1; i++) {
-          finalW[i] = Math.floor(naturalW[i] * scale);
-          running += finalW[i];
-        }
-        // Absorb sub-pixel rounding into the last column so the total
-        // exactly matches the container width.
-        finalW[n - 1] = containerW - running;
-        totalWidth = containerW;
-      } else {
-        // Naturals don't fit — use them as-is and let the body scroll.
-        for (let i = 0; i < n; i++) finalW[i] = naturalW[i];
-        totalWidth = naturalTotal;
-      }
-
-      // Step 4: restore the CSS-defined table-layout: fixed so the
-      // explicit cell widths we apply below are honoured by the browser
-      // (not redistributed by the auto-layout algorithm).
-      headTable.style.tableLayout = '';
-      bodyTable.style.tableLayout = '';
-
-      // Step 5: apply the final width to both head and body cells.
-      for (let i = 0; i < n; i++) {
-        const px = `${finalW[i]}px`;
-        headCells[i].style.width    = px;
-        headCells[i].style.minWidth = px;
-        headCells[i].style.maxWidth = px;
-        bodyCells[i].style.width    = px;
-        bodyCells[i].style.minWidth = px;
-        bodyCells[i].style.maxWidth = px;
-      }
-      // Make both tables exactly totalWidth wide so they share the same
-      // horizontal extent — column N in the header sits directly above
-      // column N in the body, no drift as you scroll right.
-      headTable.style.width = `${totalWidth}px`;
-      bodyTable.style.width = `${totalWidth}px`;
-      // Re-apply current horizontal offset so column alignment survives.
-      handleBodyScroll();
-    };
-    // Run once after layout
-    sync();
-    // Re-sync when the scroll container's width changes (window resize,
-    // sidebar opens, etc). We observe the scroller — not the body table —
-    // because the body table's width is now driven by sync itself, which
-    // would otherwise create a feedback loop.
-    let ro = null;
-    if (typeof ResizeObserver !== 'undefined' && bodyScrollRef.current) {
-      ro = new ResizeObserver(sync);
-      ro.observe(bodyScrollRef.current);
-    }
-    window.addEventListener('resize', sync);
-    return () => {
-      if (ro) ro.disconnect();
-      window.removeEventListener('resize', sync);
-    };
-  }, [forecast, visibleCols, selectedDay, skinType, vehicleType]);
+  // ─── TABLE SCROLL ────────────────────────────────────────────────────
+  // useTableScroll owns everything horizontal-scroll-related for the
+  // hourly table:
+  //   • scroll indicators (drives fade + chevron CSS)
+  //   • drag-to-scroll for desktop users
+  //   • column-width sync between sticky header and body
+  // It needs the four table refs and the deps that should trigger a
+  // re-sync (anything that changes the rendered cell content / count).
+  const {
+    tableCanScrollLeft,
+    tableCanScrollRight,
+    handleBodyScroll,
+  } = useTableScroll({
+    headTableRef, bodyTableRef, bodyScrollRef, headTrackRef,
+    forecast, visibleCols, selectedDay, skinType, vehicleType,
+  });
 
   // Geocoding search
   useEffect(() => {
@@ -695,218 +303,15 @@ export function UTCIForecast() {
     }, 300);
   }, [searchQuery]);
 
-  // ─── FORECAST FETCH ──────────────────────────────────────────────────
-  // Runs every time `location` changes (i.e. when a new city is picked).
-  // Builds the Open-Meteo URL and stores the response in `forecast`.
-  // Change forecast_days=14 below to fetch a different range (max 16).
-  // Add or remove fields in the `&hourly=...` list to fetch more data —
-  // but if you remove one that's used elsewhere, expect errors.
-  useEffect(() => {
-    async function load() {
-      setLoading(true); setError(null);
-      try {
-        const url =
-          `https://api.open-meteo.com/v1/forecast` +
-          `?latitude=${location.lat}&longitude=${location.lon}` +
-          `&hourly=temperature_2m,relative_humidity_2m,dew_point_2m,` +
-          `wind_speed_10m,wind_direction_10m,wind_gusts_10m,` +
-          `direct_radiation,diffuse_radiation,shortwave_radiation,` +
-          `cloud_cover,cloud_cover_low,cloud_cover_mid,cloud_cover_high,` +
-          `uv_index,precipitation,snowfall,visibility,` +
-          `soil_temperature_0cm,soil_temperature_6cm,soil_moisture_0_to_1cm` +
-          `&wind_speed_unit=ms&timezone=auto&forecast_days=14`;
-        const r = await fetch(url);
-        if (!r.ok) throw new Error(`Open-Meteo HTTP ${r.status}`);
-        setForecast(await r.json());
-      } catch (e) { setError(e.message); }
-      finally { setLoading(false); }
-    }
-    load();
-    loadAirQuality(location);
-  }, [location]);
-
-  // ─── AIR QUALITY FETCH (with 6-hour localStorage cache) ──────────────
-  // Fetches visibility, European AQI, and pollen from the Open-Meteo
-  // Air Quality API. Cached per location for 6 hours — pollen and AQI
-  // data updates at most a couple of times per day so there's no need
-  // to hit the API every 5 minutes with the weather refresh.
-  const SIX_HOURS_MS = 6 * 60 * 60 * 1000;
-  async function loadAirQuality(loc) {
-    const cacheKey = `sunscope_aq_${loc.lat.toFixed(4)}_${loc.lon.toFixed(4)}`;
-    try {
-      const cached = localStorage.getItem(cacheKey);
-      if (cached) {
-        const { ts, data } = JSON.parse(cached);
-        if (Date.now() - ts < SIX_HOURS_MS) {
-          setAirQuality(data);
-          return;
-        }
-      }
-    } catch (e) { /* ignore bad cache */ }
-    try {
-      const url =
-        `https://air-quality-api.open-meteo.com/v1/air-quality` +
-        `?latitude=${loc.lat}&longitude=${loc.lon}` +
-        `&hourly=european_aqi,` +
-        `grass_pollen,birch_pollen,alder_pollen,` +
-        `mugwort_pollen,olive_pollen,ragweed_pollen` +
-        `&timezone=auto&forecast_days=5`;
-      const r = await fetch(url);
-      if (!r.ok) return; // silently fail — these columns just show '—'
-      const data = await r.json();
-      setAirQuality(data);
-      try {
-        localStorage.setItem(cacheKey, JSON.stringify({ ts: Date.now(), data }));
-      } catch (e) { /* ignore storage errors */ }
-    } catch (_) { /* silently ignore */ }
-  }
-
-  // ─── AUTO-REFRESH — tick every 5 minutes ─────────────────────────────
-  // Updates `now` so the scope always shows the current hour's data.
-  // Also refetches the forecast so fresh API data comes in automatically.
-  useEffect(() => {
-    const FIVE_MIN = 5 * 60 * 1000;
-    const id = setInterval(() => {
-      setNow(new Date());
-      // Trigger a fresh forecast fetch by nudging location identity.
-      // We do this via a separate load rather than touching location state
-      // (which would reset other things), so we call load() directly.
-      async function refresh() {
-        try {
-          const url =
-            `https://api.open-meteo.com/v1/forecast` +
-            `?latitude=${location.lat}&longitude=${location.lon}` +
-            `&hourly=temperature_2m,relative_humidity_2m,dew_point_2m,` +
-            `wind_speed_10m,wind_direction_10m,wind_gusts_10m,` +
-            `direct_radiation,diffuse_radiation,shortwave_radiation,` +
-            `cloud_cover,cloud_cover_low,cloud_cover_mid,cloud_cover_high,` +
-            `uv_index,precipitation,snowfall,visibility,` +
-            `soil_temperature_0cm,soil_temperature_6cm,soil_moisture_0_to_1cm` +
-            `&wind_speed_unit=ms&timezone=auto&forecast_days=14`;
-          const r = await fetch(url);
-          if (r.ok) setForecast(await r.json());
-        } catch (_) { /* silently ignore refresh errors */ }
-        // Air quality: only refetch if cache has expired (6-hour TTL)
-        const cacheKey = `sunscope_aq_${location.lat.toFixed(4)}_${location.lon.toFixed(4)}`;
-        try {
-          const cached = localStorage.getItem(cacheKey);
-          if (cached) {
-            const { ts } = JSON.parse(cached);
-            if (Date.now() - ts < SIX_HOURS_MS) return; // still fresh
-          }
-        } catch (e) { /* ignore */ }
-        loadAirQuality(location);
-      }
-      refresh();
-    }, FIVE_MIN);
-    return () => clearInterval(id);
-  }, [location]);
+  // (FORECAST FETCH, AIR QUALITY FETCH and 5-min AUTO-REFRESH now live in
+  // ./hooks/useForecast.js — called at the top of this component.)
 
   // ─── COMPUTATION ─────────────────────────────────────────────────────
-  // Take the raw API arrays and stitch them into one object per hour,
-  // calculating UTCI + soak-factor for each row. This is what gets
-  // displayed in the table.
-  //
-  // Open-Meteo with timezone=auto returns local wall-clock strings like
-  // "2026-05-13T14:00" — no Z suffix. We use two forms:
-  //   • String slices (iso.slice(...)) for display & day grouping
-  //   • A true UTC Date for solarElevationDeg (see per-row comment below)
-  const utcOffsetMs = (forecast?.utc_offset_seconds ?? 0) * 1000;
-
-  // Build a fast lookup map from the air quality hourly data: ISO string → index.
-  // Normalise to "YYYY-MM-DDTHH" (13 chars) so forecast timestamps like
-  // "2026-05-17T14:00" match AQ timestamps like "2026-05-17T14".
-  const aqTimeMap = {};
-  if (airQuality?.hourly?.time) {
-    airQuality.hourly.time.forEach((t, i) => { aqTimeMap[t.slice(0, 13)] = i; });
-  }
-  const getAq = (field, iso) => {
-    if (!airQuality?.hourly?.[field]) return null;
-    const i = aqTimeMap[iso.slice(0, 13)];
-    if (i === undefined) return null;
-    return airQuality.hourly[field][i] ?? null;
-  };
-
-  const hourlyRows = forecast ? forecast.hourly.time.map((iso, i) => {
-    const h = forecast.hourly;
-    const Ta   = h.temperature_2m[i];
-    const RH   = h.relative_humidity_2m[i];
-    const dew  = h.dew_point_2m ? h.dew_point_2m[i] : null;
-    const va   = h.wind_speed_10m[i];
-    const wd   = h.wind_direction_10m ? h.wind_direction_10m[i] : null;
-    const gust = h.wind_gusts_10m    ? h.wind_gusts_10m[i]    : null;
-    const dir  = h.direct_radiation[i]    || 0;
-    const dif  = h.diffuse_radiation[i]   || 0;
-    const glob = h.shortwave_radiation[i] || 0;
-    const cc     = h.cloud_cover[i];
-    const ccLow  = h.cloud_cover_low  ? h.cloud_cover_low[i]  : null;
-    const ccMid  = h.cloud_cover_mid  ? h.cloud_cover_mid[i]  : null;
-    const ccHigh = h.cloud_cover_high ? h.cloud_cover_high[i] : null;
-    const uv     = h.uv_index ? (h.uv_index[i] || 0) : 0;
-    const precip = h.precipitation[i] || 0;
-    const snow   = h.snowfall[i] || 0;
-    const soilT0 = h.soil_temperature_0cm    ? h.soil_temperature_0cm[i]    : null;
-    const soilT6 = h.soil_temperature_6cm    ? h.soil_temperature_6cm[i]    : null;
-    const soilM  = h.soil_moisture_0_to_1cm  ? h.soil_moisture_0_to_1cm[i]  : null;
-    const concreteT = calcConcreteTemp(Ta, glob, va);
-    // iso is a local wall-clock string e.g. "2026-05-13T14:00" (no Z).
-    // For display we slice the string directly — no Date object needed.
-    // For solarElevationDeg (which uses .getUTC* internally) we need the
-    // true UTC instant: treat the local time as UTC then subtract the offset.
-    // e.g. Brisbane UTC+10: local 14:00 → parse as UTC 14:00 → subtract 10h → UTC 04:00 ✓
-    // True UTC instant: treat the local wall-clock string as UTC, then
-    // subtract the offset. e.g. Brisbane UTC+10, local 14:00 → UTC 04:00.
-    const dt   = new Date(Date.parse(iso + 'Z') - utcOffsetMs);
-    const elev = solarElevationDeg(location.lat, location.lon, dt);
-    const vehicleT = calcVehicleInteriorTemp(Ta, glob, elev, vehicleType, vehicleVent);
-    const eh       = vaporPressureHpa(Ta, RH);
-    const Tmrt     = calcTmrt(Ta, dir, dif, glob, elev);
-    const utci     = utciApprox(Ta, Tmrt, va, eh);
-    const utciAdj = utci + precipPenalty(precip, snow, va);
-    // Derived
-    const compass = windCompass8(wd);
-    const { uvA, uvB } = uvSplit(uv, elev);
-    const cloudCat = cloudCategory(cc, ccLow, ccMid, ccHigh);
-    // Visibility from the main forecast API (metres → km).
-    const visKm        = (() => { const v = h.visibility ? h.visibility[i] : null; return v != null ? v / 1000 : null; })();
-    const aqi          = getAq('european_aqi', iso);
-    const grassPollen  = getAq('grass_pollen', iso);
-    const birchPollen  = getAq('birch_pollen', iso);
-    const alderPollen  = getAq('alder_pollen', iso);
-    const mugwortPollen= getAq('mugwort_pollen', iso);
-    const olivePollen  = getAq('olive_pollen', iso);
-    const ragweedPollen= getAq('ragweed_pollen', iso);
-    return {
-      iso, dt, Ta, RH, dew, va, wd, gust, dir, dif, glob,
-      cc, ccLow, ccMid, ccHigh, cloudCat,
-      uv, uvA, uvB,
-      precip, snow,
-      soilT0, soilT6, soilM, concreteT, vehicleT,
-      elev, Tmrt, utci, utciAdj, eh, compass,
-      visKm, aqi,
-      grassPollen, birchPollen, alderPollen, mugwortPollen, olivePollen, ragweedPollen,
-    };
-  }) : [];
-
-  // Two-pass indoor temperature: needs the full hourly arrays so thermal
-  // lag can look back at previous hours. Run after hourlyRows is built,
-  // then stamp each row with its indoorT value.
-  if (hourlyRows.length > 0) {
-    const TaArr   = hourlyRows.map(r => r.Ta);
-    const globArr = hourlyRows.map(r => r.glob);
-    const elevArr = hourlyRows.map(r => r.elev);
-    const indoorTemps = calcIndoorTempPass(TaArr, globArr, elevArr, buildingType);
-    const managedTemps = calcManagedIndoorTempPass(TaArr, globArr, elevArr, buildingType);
-    hourlyRows.forEach((r, i) => { r.indoorT = indoorTemps[i]; r.managedT = managedTemps[i]; });
-  }
-
-  // Group those hourly rows into days for the day tabs.
-  const days = [];
-  hourlyRows.forEach(row => {
-    const key = row.iso.slice(0, 10);
-    let day = days.find(d => d.key === key);
-    if (!day) { day = { key, rows: [] }; days.push(day); }
-    day.rows.push(row);
+  // Stitch the raw API arrays into one object per hour (UTCI + soak factor,
+  // indoor temps, AQI, pollen, etc) and group into days for the day tabs.
+  // See ./compute.js for the full algorithm.
+  const { hourlyRows, days, utcOffsetMs } = buildHourlyRows({
+    forecast, airQuality, location, vehicleType, vehicleVent, buildingType,
   });
 
   const visible = days[selectedDay]?.rows || [];
@@ -927,21 +332,55 @@ export function UTCIForecast() {
   // activeEvents     — today's events → drives banner & lens overlay.
   // selectedDayEvents — viewed day's events → drives cell tags.
   const [dismissedEventIds, setDismissedEventIds] = useState([]);
-  const [bannerIndex, setBannerIndex] = useState(0);
+  const [bannerIndex, setBannerIndex]           = useState(0);
+  const [bannerTransition, setBannerTransition] = useState(null); // 'entering' | 'exiting' | null
+  // bannerVisible drives the .visible class — kept true until the collapse
+  // animation finishes so content doesn't vanish before the wrap closes.
+  const [bannerVisible, setBannerVisible]       = useState(false);
+  const bannerIndexRef = useRef(0);
+  useEffect(() => { bannerIndexRef.current = bannerIndex; }, [bannerIndex]);
+
   const todayRows = days[0]?.rows || [];
   const activeEvents = getActiveEvents(todayRows, location)
     .filter(ev => !dismissedEventIds.includes(ev.id));
   const lensEvent = getLensEvent(activeEvents);
   const selectedDayEvents = getActiveEvents(visible, location);
 
+  // Sync visibility: show as soon as events exist, hide after dismiss animation
+  useEffect(() => {
+    if (activeEvents.length > 0) setBannerVisible(true);
+  }, [activeEvents.length]);
+
+  // Crossfade to a new banner index: fade out → swap → fade in
+  const bannerSlideTo = useCallback((next) => {
+    setBannerTransition('exiting');
+    setTimeout(() => {
+      setBannerIndex(next);
+      setBannerTransition('entering');
+      setTimeout(() => setBannerTransition(null), 420);
+    }, 400);
+  }, []);
+
+  // Dismiss with animation: fade stage → collapse wrap → remove event
+  const dismissBanner = useCallback((evId) => {
+    // 1. fade the stage out (CSS handles this via :not(.visible))
+    setBannerVisible(false);
+    // 2. after wrap has collapsed (grid transition ~450ms), remove the event
+    setTimeout(() => {
+      setDismissedEventIds(ids => [...ids, evId]);
+      setBannerIndex(0);
+    }, 500);
+  }, []);
+
   // Auto-advance banner slideshow every 10 seconds when multiple events
   useEffect(() => {
     if (activeEvents.length <= 1) { setBannerIndex(0); return; }
     const id = setInterval(() => {
-      setBannerIndex(i => (i + 1) % activeEvents.length);
+      const next = (bannerIndexRef.current + 1) % activeEvents.length;
+      bannerSlideTo(next);
     }, 10000);
     return () => clearInterval(id);
-  }, [activeEvents.length, activeEvents.map(e => e.id).join(',')]);
+  }, [activeEvents.length, activeEvents.map(e => e.id).join(','), bannerSlideTo]);
 
   // Keep index in bounds if events change
   useEffect(() => {
@@ -989,7 +428,7 @@ export function UTCIForecast() {
       <main class="utci-shell">
 
         <!-- ── EVENT BANNER ── slideshow when multiple events active ── -->
-        <div class=${`event-banner-wrap${activeEvents.length > 0 ? ' visible' : ''}`}>
+        <div class=${`event-banner-wrap${bannerVisible ? ' visible' : ''}`}>
           ${activeEvents.length > 0 && (() => {
             const ev = activeEvents[bannerIndex] || activeEvents[0];
             const fmtDate = (iso) => iso
@@ -1008,38 +447,40 @@ export function UTCIForecast() {
                     : `Active ${startFmt} – ${endFmt}`)
               : null;
             return html`
-              <div class="event-banner"
-                style=${{ background: ev.color, color: ev.textColor }}
-              >
-                <span class="event-banner-emoji">${ev.emoji}</span>
-                <div class="event-banner-body">
-                  <div class="event-banner-title">${ev.title}</div>
-                  <div class="event-banner-msg">${ev.message}</div>
-                  ${dateLine && html`
-                    <div class="event-banner-dates" style=${{ opacity: 0.75, fontSize: '11px', fontFamily: 'Manrope, sans-serif', fontWeight: 700, letterSpacing: '0.05em', textTransform: 'uppercase', marginTop: '5px' }}>
-                      ${dateLine}
-                    </div>
-                  `}
-                  ${activeEvents.length > 1 && html`
-                    <div class="event-banner-dots">
-                      ${activeEvents.map((_, i) => html`
-                        <span
-                          key=${i}
-                          class=${`event-banner-dot${i === bannerIndex ? ' active' : ''}`}
-                          onClick=${() => setBannerIndex(i)}
-                          style=${{ background: ev.textColor }}
-                        />
-                      `)}
-                    </div>
-                  `}
+              <div class="event-banner-stage">
+                <div class=${`event-banner${bannerTransition ? ` banner-${bannerTransition}` : ''}`}
+                  style=${{ background: ev.color, color: ev.textColor }}
+                >
+                  <span class="event-banner-emoji">${ev.emoji}</span>
+                  <div class="event-banner-body">
+                    <div class="event-banner-title">${ev.title}</div>
+                    <div class="event-banner-msg">${ev.message}</div>
+                    ${dateLine && html`
+                      <div class="event-banner-dates" style=${{ opacity: 0.75, fontSize: '11px', fontFamily: 'Manrope, sans-serif', fontWeight: 700, letterSpacing: '0.05em', textTransform: 'uppercase', marginTop: '5px' }}>
+                        ${dateLine}
+                      </div>
+                    `}
+                    ${activeEvents.length > 1 && html`
+                      <div class="event-banner-dots">
+                        ${activeEvents.map((_, i) => html`
+                          <span
+                            key=${i}
+                            class=${`event-banner-dot${i === bannerIndex ? ' active' : ''}`}
+                            onClick=${() => bannerSlideTo(i)}
+                            style=${{ background: ev.textColor }}
+                          />
+                        `)}
+                      </div>
+                    `}
+                  </div>
+                  <button
+                    class="event-banner-dismiss"
+                    style=${{ color: ev.textColor }}
+                    onClick=${() => dismissBanner(ev.id)}
+                    aria-label="Dismiss"
+                    title="Dismiss this event"
+                  >✕</button>
                 </div>
-                <button
-                  class="event-banner-dismiss"
-                  style=${{ color: ev.textColor }}
-                  onClick=${() => setDismissedEventIds(ids => [...ids, ev.id])}
-                  aria-label="Dismiss"
-                  title="Dismiss this event"
-                >✕</button>
               </div>`;
           })()}
         </div>
@@ -1455,22 +896,18 @@ export function UTCIForecast() {
               })}
               <span class="profile-divider" aria-hidden="true"></span>
               <${CustomSelect}
-                key="activities"
-                value=${activityValue}
-                isOn=${activeProfile === 'farming' || (activeProfile === 'outdoors' && activityVariantKeys.includes(outdoorsVariant))}
+                key="places"
+                value=${placeValue}
+                isOn=${activeProfile === 'outdoors' && placeVariantKeys.includes(outdoorsVariant)}
                 noHide=${true}
-                hideLabel="🎯 Activities"
-                buttonLabel=${activityValue === 'off' ? '🎯 Activities' : ` ${activityLabel}`}
-                options=${activityOptions}
+                hideLabel="🌤️ Places"
+                buttonLabel=${placeValue === 'off' ? '🌤️ Places' : `${placeLabel}`}
+                options=${placeOptions}
                 onChange=${(v) => {
                   if (v === 'off') {
                     activateProfile('basic');
                     return;
                   }
-                  if (v === 'farming') {
-                    activateProfile('farming');
-                    return;
-                  }
                   if (OUTDOORS_VARIANTS[v]?.proOnly && !isPro) {
                     setProPromptSource(`variant:${v}`);
                     setProPromptDay(0);
@@ -1484,18 +921,22 @@ export function UTCIForecast() {
                 }}
               />
               <${CustomSelect}
-                key="places"
-                value=${placeValue}
-                isOn=${activeProfile === 'outdoors' && placeVariantKeys.includes(outdoorsVariant)}
+                key="activities"
+                value=${activityValue}
+                isOn=${activeProfile === 'farming' || (activeProfile === 'outdoors' && activityVariantKeys.includes(outdoorsVariant))}
                 noHide=${true}
-                hideLabel="🌤️ Places"
-                buttonLabel=${placeValue === 'off' ? '🌤️ Places' : `${placeLabel}`}
-                options=${placeOptions}
+                hideLabel="🎯 Activities"
+                buttonLabel=${activityValue === 'off' ? '🎯 Activities' : ` ${activityLabel}`}
+                options=${activityOptions}
                 onChange=${(v) => {
                   if (v === 'off') {
                     activateProfile('basic');
                     return;
                   }
+                  if (v === 'farming') {
+                    activateProfile('farming');
+                    return;
+                  }
                   if (OUTDOORS_VARIANTS[v]?.proOnly && !isPro) {
                     setProPromptSource(`variant:${v}`);
                     setProPromptDay(0);
@@ -1538,23 +979,23 @@ export function UTCIForecast() {
               Burn + Vehicle dropdowns always shown (free + pro).
               Pro users see all toggles; free users see profile-filtered subset.
             -->
-            ${(isPro || activeProfile === 'outdoors' || FILTER_PROFILES[activeProfile]?.cols['burn'] || FILTER_PROFILES[activeProfile]?.cols['vehicleT'] || FILTER_PROFILES[activeProfile]?.cols['indoorT'] || FILTER_PROFILES[activeProfile]?.cols['managedT']) && html`
+            ${(isPro || activeCols['burn'] || activeCols['vehicleT'] || activeCols['indoorT'] || activeCols['managedT'] || activeCols['pollen']) && html`
               <div class="col-toggles">
                 <span class="col-toggles-label">Columns:</span>
 
-${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['air']) && html`<button class=${`col-toggle${visibleCols.air ? ' on' : ''}`} onClick=${() => toggleCol('air')}>Air</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['rh']) && html`<button class=${`col-toggle${visibleCols.rh ? ' on' : ''}`} onClick=${() => toggleCol('rh')}>RH</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['dew']) && html`<button class=${`col-toggle${visibleCols.dew ? ' on' : ''}`} onClick=${() => toggleCol('dew')}>Dew</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['soilT']) && html`<button class=${`col-toggle${visibleCols.soilT ? ' on' : ''}`} onClick=${() => toggleCol('soilT')}>Soil °C</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['soilT6']) && html`<button class=${`col-toggle${visibleCols.soilT6 ? ' on' : ''}`} onClick=${() => toggleCol('soilT6')}>Soil 6cm</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['soilM']) && html`<button class=${`col-toggle${visibleCols.soilM ? ' on' : ''}`} onClick=${() => toggleCol('soilM')}>Soil moist</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['concreteT']) && html`<button class=${`col-toggle${visibleCols.concreteT ? ' on' : ''}`} onClick=${() => toggleCol('concreteT')}>Concrete</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['wind']) && html`<button class=${`col-toggle${visibleCols.wind ? ' on' : ''}`} onClick=${() => toggleCol('wind')}>Wind</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['dir']) && html`<button class=${`col-toggle${visibleCols.dir ? ' on' : ''}`} onClick=${() => toggleCol('dir')}>Dir</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['cloud']) && html`<button class=${`col-toggle${visibleCols.cloud ? ' on' : ''}`} onClick=${() => toggleCol('cloud')}>Cloud</button>`}
-                ${isPro && html`<button class=${`col-toggle${visibleCols.vis ? ' on' : ''}`} onClick=${() => toggleCol('vis')}>Visibility</button>`}
-                ${isPro && html`<button class=${`col-toggle${visibleCols.aqi ? ' on' : ''}`} onClick=${() => toggleCol('aqi')}>Air Quality</button>`}
-                <${CustomSelect}
+${isPro && (activeProfile === 'custom' || activeCols['air']) && html`<button class=${`col-toggle${visibleCols.air ? ' on' : ''}`} onClick=${() => toggleCol('air')}>Air</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['rh']) && html`<button class=${`col-toggle${visibleCols.rh ? ' on' : ''}`} onClick=${() => toggleCol('rh')}>RH</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['dew']) && html`<button class=${`col-toggle${visibleCols.dew ? ' on' : ''}`} onClick=${() => toggleCol('dew')}>Dew</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['soilT']) && html`<button class=${`col-toggle${visibleCols.soilT ? ' on' : ''}`} onClick=${() => toggleCol('soilT')}>Soil °C</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['soilT6']) && html`<button class=${`col-toggle${visibleCols.soilT6 ? ' on' : ''}`} onClick=${() => toggleCol('soilT6')}>Soil 6cm</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['soilM']) && html`<button class=${`col-toggle${visibleCols.soilM ? ' on' : ''}`} onClick=${() => toggleCol('soilM')}>Soil moist</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['concreteT']) && html`<button class=${`col-toggle${visibleCols.concreteT ? ' on' : ''}`} onClick=${() => toggleCol('concreteT')}>Concrete</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['wind']) && html`<button class=${`col-toggle${visibleCols.wind ? ' on' : ''}`} onClick=${() => toggleCol('wind')}>Wind</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['dir']) && html`<button class=${`col-toggle${visibleCols.dir ? ' on' : ''}`} onClick=${() => toggleCol('dir')}>Dir</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['cloud']) && html`<button class=${`col-toggle${visibleCols.cloud ? ' on' : ''}`} onClick=${() => toggleCol('cloud')}>Cloud</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['vis']) && html`<button class=${`col-toggle${visibleCols.vis ? ' on' : ''}`} onClick=${() => toggleCol('vis')}>Visibility</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['aqi']) && html`<button class=${`col-toggle${visibleCols.aqi ? ' on' : ''}`} onClick=${() => toggleCol('aqi')}>Air Quality</button>`}
+                ${(isPro || activeCols['pollen']) && html`<${CustomSelect}
                   value=${pollenType}
                   isOn=${visibleCols.pollen}
                   hideLabel="Pollen"
@@ -1571,17 +1012,17 @@ ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['a
                       setVisibleCols(prev => ({ ...prev, pollen: true }));
                     }
                   }}
-                />
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['sun']) && html`<button class=${`col-toggle${visibleCols.sun ? ' on' : ''}`} onClick=${() => toggleCol('sun')}>Sun</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['direct']) && html`<button class=${`col-toggle${visibleCols.direct ? ' on' : ''}`} onClick=${() => toggleCol('direct')}>Direct</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['diffuse']) && html`<button class=${`col-toggle${visibleCols.diffuse ? ' on' : ''}`} onClick=${() => toggleCol('diffuse')}>Diffuse</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['tmrt']) && html`<button class=${`col-toggle${visibleCols.tmrt ? ' on' : ''}`} onClick=${() => toggleCol('tmrt')}>Tmrt</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['delta']) && html`<button class=${`col-toggle${visibleCols.delta ? ' on' : ''}`} onClick=${() => toggleCol('delta')}>Δ</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['utci']) && html`<button class=${`col-toggle${visibleCols.utci ? ' on' : ''}`} onClick=${() => toggleCol('utci')}>UTCI</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['uvA']) && html`<button class=${`col-toggle${visibleCols.uvA ? ' on' : ''}`} onClick=${() => toggleCol('uvA')}>UV-A</button>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['uvB']) && html`<button class=${`col-toggle${visibleCols.uvB ? ' on' : ''}`} onClick=${() => toggleCol('uvB')}>UV-B</button>`}
+                />`}
+                ${isPro && (activeProfile === 'custom' || activeCols['sun']) && html`<button class=${`col-toggle${visibleCols.sun ? ' on' : ''}`} onClick=${() => toggleCol('sun')}>Sun</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['direct']) && html`<button class=${`col-toggle${visibleCols.direct ? ' on' : ''}`} onClick=${() => toggleCol('direct')}>Direct</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['diffuse']) && html`<button class=${`col-toggle${visibleCols.diffuse ? ' on' : ''}`} onClick=${() => toggleCol('diffuse')}>Diffuse</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['tmrt']) && html`<button class=${`col-toggle${visibleCols.tmrt ? ' on' : ''}`} onClick=${() => toggleCol('tmrt')}>Tmrt</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['delta']) && html`<button class=${`col-toggle${visibleCols.delta ? ' on' : ''}`} onClick=${() => toggleCol('delta')}>Δ</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['utci']) && html`<button class=${`col-toggle${visibleCols.utci ? ' on' : ''}`} onClick=${() => toggleCol('utci')}>UTCI</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['uvA']) && html`<button class=${`col-toggle${visibleCols.uvA ? ' on' : ''}`} onClick=${() => toggleCol('uvA')}>UV-A</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['uvB']) && html`<button class=${`col-toggle${visibleCols.uvB ? ' on' : ''}`} onClick=${() => toggleCol('uvB')}>UV-B</button>`}
 
-                ${(activeProfile === 'custom' || FILTER_PROFILES[activeProfile]?.cols['burn']) && html`
+                ${(isPro ? (activeProfile === 'custom' || activeCols['burn']) : activeCols['burn']) && html`
                   <${CustomSelect}
                     value=${skinType}
                     isOn=${visibleCols.burn}
@@ -1601,7 +1042,7 @@ ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['a
                     }}
                   />`}
 
-                ${(activeProfile === 'custom' || FILTER_PROFILES[activeProfile]?.cols['vehicleT']) && html`
+                ${(isPro ? (activeProfile === 'custom' || activeCols['vehicleT']) : activeCols['vehicleT']) && html`
                   <span class="col-toggle-group">
                     <${CustomSelect}
                       value=${vehicleType}
@@ -1633,7 +1074,7 @@ ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['a
                       />`}
                   </span>`}
 
-                ${(activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['indoorT'] || FILTER_PROFILES[activeProfile].cols['managedT']) && html`
+                ${(isPro ? (activeProfile === 'custom' || activeCols['indoorT'] || activeCols['managedT']) : (activeCols['indoorT'] || activeCols['managedT'])) && html`
                   <span class="col-toggle-group">
                     <${CustomSelect}
                       value=${buildingType}
@@ -1664,7 +1105,7 @@ ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['a
                         title="Managed: curtains closed by day, windows open when cooler outside"
                       />`}
                   </span>`}
-                ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['precip']) && html`<button class=${`col-toggle${visibleCols.precip ? ' on' : ''}`} onClick=${() => toggleCol('precip')}>Precip</button>`}
+                ${isPro && (activeProfile === 'custom' || activeCols['precip']) && html`<button class=${`col-toggle${visibleCols.precip ? ' on' : ''}`} onClick=${() => toggleCol('precip')}>Precip</button>`}
 
               </div>`}
 
@@ -1796,14 +1237,17 @@ ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['a
                           <span style=${{ display: 'inline-flex', alignItems: 'center', gap: '7px', verticalAlign: 'middle' }}>
                             <${SkyScope} elev=${r.elev} dt=${r.dt} glob=${r.glob} size=${30} />
                             <span>${localHHMM}</span>
-                            ${getCellTagEvents(selectedDayEvents, r).map(ev => html`
-                              <span key=${ev.id} class="event-cell-tag"
-                                onClick=${(e) => handleEventTagClick(ev, e)}
-                                onMouseEnter=${(e) => handleEventTagEnter(ev, e)}
-                                onMouseLeave=${handleEventTagLeave}
-                                role="button" tabIndex="0" aria-label=${ev.title}
-                              >${ev.emoji}</span>
-                            `)}
+                            ${(() => {
+                              const rowEvents = getCellTagEvents(selectedDayEvents, r);
+                              return rowEvents.map(ev => html`
+                                <span key=${ev.id} class="event-cell-tag"
+                                  onClick=${(e) => handleEventTagClick(rowEvents, e)}
+                                  onMouseEnter=${(e) => handleEventTagEnter(rowEvents, e)}
+                                  onMouseLeave=${handleEventTagLeave}
+                                  role="button" tabIndex="0" aria-label=${ev.title}
+                                >${ev.emoji}</span>
+                              `);
+                            })()}
                           </span>
                         </td>
                         ${visibleCols.air     && html`<td style=${{ background: tempBg(r.Ta) }}>${r.Ta.toFixed(1)}</td>`}
@@ -1830,9 +1274,11 @@ ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['a
                             <span class="wind-dir-label" style=${{ fontFamily: 'Manrope, sans-serif', fontSize: '11px', fontWeight: 700 }}>${r.compass.label}</span>
                           </span>
                         </td>`}
-                        ${visibleCols.cloud   && html`<td style=${{ background: scaleBg(r.cc, 0, 100, '110,130,150', 0.07) }}>
+                        ${visibleCols.cloud   && html`<td style=${{ background: scaleBg(r.cc, 0, 100, '110,130,150', 0.07), verticalAlign: 'middle' }}>
                           <span style=${{ display: 'inline-flex', alignItems: 'center', gap: '6px', verticalAlign: 'middle' }}>
-                            <${CloudIcon} category=${r.cloudCat} elev=${r.elev} dt=${r.dt} size=${28} />
+                            <span style=${{ position: 'relative', top: '6px' }}>
+                              <${CloudIcon} category=${r.cloudCat} elev=${r.elev} dt=${r.dt} size=${28} />
+                            </span>
                             <span>${Math.round(r.cc)}</span>
                           </span>
                         </td>`}
@@ -1970,24 +1416,41 @@ ${isPro && (activeProfile === 'custom' || FILTER_PROFILES[activeProfile].cols['a
                 <p class="col-info-desc">${COL_DESCRIPTIONS[colPopup.key].desc}</p>
               </div>`}
 
-            ${eventTagPopup && html`
-              <div
-                ref=${eventTagPopupRef}
-                class=${`col-info-popup${eventTagPopup.below ? ' col-info-popup--below' : ''}`}
-                style=${{
-                  position: 'fixed',
-                  left: `${eventTagPopup.x}px`,
-                  top: `${eventTagPopup.y}px`,
-                  transform: eventTagPopup.below ? 'translateX(-50%)' : 'translateX(-50%) translateY(-100%)',
-                  '--arrow-left': `${eventTagPopup.arrowLeft}px`,
-                }}
-                onMouseEnter=${handleEventTagPopupEnter}
-                onMouseLeave=${handleEventTagPopupLeave}
-              >
-                <button class="col-info-close" onClick=${closeEventTagPopup} aria-label="Close">×</button>
-                <strong class="col-info-title">${eventTagPopup.ev.emoji} ${eventTagPopup.ev.title}</strong>
-                <p class="col-info-desc">${eventTagPopup.ev.message}</p>
-              </div>`}
+            ${eventTagPopup && (() => {
+              const evs = eventTagPopup.events;
+              const ev  = evs[evSlideIndex] || evs[0];
+              return html`
+                <div
+                  ref=${eventTagPopupRef}
+                  class=${`col-info-popup col-info-popup--ev${eventTagPopup.below ? ' col-info-popup--below' : ''}`}
+                  style=${{
+                    position: 'fixed',
+                    left: `${eventTagPopup.x}px`,
+                    top: `${eventTagPopup.y}px`,
+                    transform: eventTagPopup.below ? 'translateX(-50%)' : 'translateX(-50%) translateY(-100%)',
+                    '--arrow-left': `${eventTagPopup.arrowLeft}px`,
+                  }}
+                  onMouseEnter=${handleEventTagPopupEnter}
+                  onMouseLeave=${handleEventTagPopupLeave}
+                >
+                  <button class="col-info-close" onClick=${closeEventTagPopup} aria-label="Close">×</button>
+                  <div class=${`ev-popup-stage${evTransition ? ` ev-popup-${evTransition}` : ''}`}>
+                    <strong class="col-info-title">${ev.emoji} ${ev.title}</strong>
+                    <p class="col-info-desc">${ev.message}</p>
+                  </div>
+                  ${evs.length > 1 && html`
+                    <div class="ev-popup-dots">
+                      ${evs.map((_, i) => html`
+                        <span
+                          key=${i}
+                          class=${`ev-popup-dot${i === evSlideIndex ? ' active' : ''}`}
+                          onClick=${() => evSlideTo(i)}
+                        />
+                      `)}
+                    </div>
+                  `}
+                </div>`;
+            })()}
 
             <div class="utci-legend">
               <span class="utci-legend-label">Thermal stress bands</span>
diff --git a/assets/js/compute.js b/assets/js/compute.js
new file mode 100644
index 0000000..b74e36f
--- /dev/null
+++ b/assets/js/compute.js
@@ -0,0 +1,118 @@
+// ════════════════════════════════════════════════════════════════════════
+//  compute.js — Build the per-hour display rows from the raw API data.
+//
+//  Pure-ish function: feed in (forecast, airQuality, location, vehicleType,
+//  vehicleVent, buildingType) and get back { hourlyRows, days, utcOffsetMs }.
+//
+//  Open-Meteo with timezone=auto returns local wall-clock strings like
+//  "2026-05-13T14:00" — no Z suffix. Two forms are used in each row:
+//    • String slices (iso.slice(...)) for display & day grouping
+//    • A true UTC Date (dt) for solarElevationDeg (which uses .getUTC*).
+// ════════════════════════════════════════════════════════════════════════
+
+import {
+  vaporPressureHpa, solarElevationDeg, calcTmrt, utciApprox,
+  calcConcreteTemp, calcVehicleInteriorTemp,
+  calcIndoorTempPass, calcManagedIndoorTempPass,
+} from './physics.js';
+import { windCompass8, uvSplit, cloudCategory, precipPenalty } from './utils.js';
+
+export function buildHourlyRows({ forecast, airQuality, location, vehicleType, vehicleVent, buildingType }) {
+  const utcOffsetMs = (forecast?.utc_offset_seconds ?? 0) * 1000;
+
+  // Build a fast lookup map from the air quality hourly data: ISO string → index.
+  // Normalise to "YYYY-MM-DDTHH" (13 chars) so forecast timestamps like
+  // "2026-05-17T14:00" match AQ timestamps like "2026-05-17T14".
+  const aqTimeMap = {};
+  if (airQuality?.hourly?.time) {
+    airQuality.hourly.time.forEach((t, i) => { aqTimeMap[t.slice(0, 13)] = i; });
+  }
+  const getAq = (field, iso) => {
+    if (!airQuality?.hourly?.[field]) return null;
+    const i = aqTimeMap[iso.slice(0, 13)];
+    if (i === undefined) return null;
+    return airQuality.hourly[field][i] ?? null;
+  };
+
+  const hourlyRows = forecast ? forecast.hourly.time.map((iso, i) => {
+    const h = forecast.hourly;
+    const Ta   = h.temperature_2m[i];
+    const RH   = h.relative_humidity_2m[i];
+    const dew  = h.dew_point_2m ? h.dew_point_2m[i] : null;
+    const va   = h.wind_speed_10m[i];
+    const wd   = h.wind_direction_10m ? h.wind_direction_10m[i] : null;
+    const gust = h.wind_gusts_10m    ? h.wind_gusts_10m[i]    : null;
+    const dir  = h.direct_radiation[i]    || 0;
+    const dif  = h.diffuse_radiation[i]   || 0;
+    const glob = h.shortwave_radiation[i] || 0;
+    const cc     = h.cloud_cover[i];
+    const ccLow  = h.cloud_cover_low  ? h.cloud_cover_low[i]  : null;
+    const ccMid  = h.cloud_cover_mid  ? h.cloud_cover_mid[i]  : null;
+    const ccHigh = h.cloud_cover_high ? h.cloud_cover_high[i] : null;
+    const uv     = h.uv_index ? (h.uv_index[i] || 0) : 0;
+    const precip = h.precipitation[i] || 0;
+    const snow   = h.snowfall[i] || 0;
+    const soilT0 = h.soil_temperature_0cm    ? h.soil_temperature_0cm[i]    : null;
+    const soilT6 = h.soil_temperature_6cm    ? h.soil_temperature_6cm[i]    : null;
+    const soilM  = h.soil_moisture_0_to_1cm  ? h.soil_moisture_0_to_1cm[i]  : null;
+    const concreteT = calcConcreteTemp(Ta, glob, va);
+    // iso is a local wall-clock string e.g. "2026-05-13T14:00" (no Z).
+    // For display we slice the string directly — no Date object needed.
+    // For solarElevationDeg (which uses .getUTC* internally) we need the
+    // true UTC instant: treat the local time as UTC then subtract the offset.
+    // e.g. Brisbane UTC+10: local 14:00 → parse as UTC 14:00 → subtract 10h → UTC 04:00 ✓
+    const dt   = new Date(Date.parse(iso + 'Z') - utcOffsetMs);
+    const elev = solarElevationDeg(location.lat, location.lon, dt);
+    const vehicleT = calcVehicleInteriorTemp(Ta, glob, elev, vehicleType, vehicleVent);
+    const eh       = vaporPressureHpa(Ta, RH);
+    const Tmrt     = calcTmrt(Ta, dir, dif, glob, elev);
+    const utci     = utciApprox(Ta, Tmrt, va, eh);
+    const utciAdj = utci + precipPenalty(precip, snow, va);
+    // Derived
+    const compass = windCompass8(wd);
+    const { uvA, uvB } = uvSplit(uv, elev);
+    const cloudCat = cloudCategory(cc, ccLow, ccMid, ccHigh);
+    // Visibility from the main forecast API (metres → km).
+    const visKm        = (() => { const v = h.visibility ? h.visibility[i] : null; return v != null ? v / 1000 : null; })();
+    const aqi          = getAq('european_aqi', iso);
+    const grassPollen  = getAq('grass_pollen', iso);
+    const birchPollen  = getAq('birch_pollen', iso);
+    const alderPollen  = getAq('alder_pollen', iso);
+    const mugwortPollen= getAq('mugwort_pollen', iso);
+    const olivePollen  = getAq('olive_pollen', iso);
+    const ragweedPollen= getAq('ragweed_pollen', iso);
+    return {
+      iso, dt, Ta, RH, dew, va, wd, gust, dir, dif, glob,
+      cc, ccLow, ccMid, ccHigh, cloudCat,
+      uv, uvA, uvB,
+      precip, snow,
+      soilT0, soilT6, soilM, concreteT, vehicleT,
+      elev, Tmrt, utci, utciAdj, eh, compass,
+      visKm, aqi,
+      grassPollen, birchPollen, alderPollen, mugwortPollen, olivePollen, ragweedPollen,
+    };
+  }) : [];
+
+  // Two-pass indoor temperature: needs the full hourly arrays so thermal
+  // lag can look back at previous hours. Run after hourlyRows is built,
+  // then stamp each row with its indoorT value.
+  if (hourlyRows.length > 0) {
+    const TaArr   = hourlyRows.map(r => r.Ta);
+    const globArr = hourlyRows.map(r => r.glob);
+    const elevArr = hourlyRows.map(r => r.elev);
+    const indoorTemps = calcIndoorTempPass(TaArr, globArr, elevArr, buildingType);
+    const managedTemps = calcManagedIndoorTempPass(TaArr, globArr, elevArr, buildingType);
+    hourlyRows.forEach((r, i) => { r.indoorT = indoorTemps[i]; r.managedT = managedTemps[i]; });
+  }
+
+  // Group those hourly rows into days for the day tabs.
+  const days = [];
+  hourlyRows.forEach(row => {
+    const key = row.iso.slice(0, 10);
+    let day = days.find(d => d.key === key);
+    if (!day) { day = { key, rows: [] }; days.push(day); }
+    day.rows.push(row);
+  });
+
+  return { hourlyRows, days, utcOffsetMs };
+}
diff --git a/assets/js/config.js b/assets/js/config.js
new file mode 100644
index 0000000..5002bfd
--- /dev/null
+++ b/assets/js/config.js
@@ -0,0 +1,162 @@
+// ════════════════════════════════════════════════════════════════════════
+//  config.js — Pure-data configuration constants for the UTCIForecast app.
+//
+//  Moved out of app.js so the main component is easier to read and edit.
+//  Nothing here has state or side effects — just constants and lookup
+//  tables imported by app.js (and anywhere else that needs them).
+//
+//  Where to find things:
+//    FREE_DAYS .................. how many days the free tier shows
+//    FILTER_PROFILES ............ preset column sets (Basic, Home, etc.)
+//    OUTDOORS_VARIANTS .......... Places & Activities sub-variants
+//    POLLEN_TYPES ............... pollen-column pulldown options
+//    variantIcons ............... emoji glyph per place/activity variant
+//    profileButtonOrder ......... left-to-right order of the profile buttons
+//    activityVariantKeys ........ which variants appear in the Activities menu
+//    placeVariantKeys ........... which variants appear in the Places menu
+//    COL_DESCRIPTIONS ........... tooltip text for each table column header
+// ════════════════════════════════════════════════════════════════════════
+
+// How many days the free tier shows. Days beyond this get a 🔒.
+// Bump this number if you want to give free users more access.
+export const FREE_DAYS = 3;
+
+// Filter profile presets — each preset defines which columns are visible
+// when that profile is selected.
+export const FILTER_PROFILES = {
+  basic: {
+    label: 'Basic',
+    icon: '🌡️',
+    cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true, aqi: false, pollen: false },
+  },
+  home: {
+    label: 'Home',
+    icon: '🏠',
+    cols: { hour: true, air: true, rh: true, dew: true, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: false, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: true, managedT: true, vis: false, aqi: true, pollen: true },
+  },
+  vehicle: {
+    label: 'Vehicle',
+    icon: '🚗',
+    cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: false, soilT6: false, soilM: true, concreteT: false, vehicleT: true, indoorT: false, managedT: false, vis: true, aqi: false, pollen: false },
+  },
+  farming: {
+    label: 'Farming',
+    icon: '🌾',
+    cols: { hour: true, air: true, rh: true, dew: true, wind: true, dir: true, cloud: true, sun: true, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: true, soilT6: true, soilM: true, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: true, pollen: true },
+  },
+  outdoors: {
+    label: 'Places',
+    icon: '🌤️',
+    // Default cols match the first variant (urban). Switching variant updates visibleCols.
+    cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true, uvB: false, burn: true, utciP: true, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: true, vehicleT: false, indoorT: false, managedT: false, vis: true, aqi: true, pollen: false },
+  },
+  alltemps: {
+    label: 'Temps',
+    icon: '🌡️',
+    proOnly: true,
+    cols: { hour: true, air: true, rh: false, dew: false, wind: false, dir: false, cloud: false, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: false, soilT: true, soilT6: false, soilM: false, concreteT: true, vehicleT: true, indoorT: true, managedT: true, vis: false, aqi: false, pollen: false },
+  },
+  custom: {
+    label: 'Custom',
+    icon: '⚙️',
+    proOnly: true,
+    cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: false, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true, precip: true, soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: false, pollen: false },
+  },
+};
+
+// Places sub-variants — each has its own column set.
+// Selecting a variant applies its cols to visibleCols.
+export const OUTDOORS_VARIANTS = {
+  urban:    { name: 'Urban',         cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: true,  vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: true,  pollen: false } },
+  beach:    { name: 'Beach',         cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: true,  cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: true,  burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+  events:   { name: 'Events',        cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: true,  vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: false, pollen: true  } },
+  festival: { name: 'Festival', proOnly: true, cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: true,  concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: true,  pollen: true  } },
+  wintersports: { name: 'Winter Sports', proOnly: true, cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: true,  burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+  naturist:     { name: 'Naturist', proOnly: true, cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: false, cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: true,  uvA: true,  uvB: true,  burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: true,  pollen: true  } },
+  sailing:      { name: 'Sailing',       proOnly: true, cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: true,  cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: true,  uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+  // Places — free
+  park:         { name: 'Park / Picnic',              cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: false, pollen: true  } },
+  airport:      { name: 'Airport / Travel',           cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: false, precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+  // Places — Pro
+  construction: { name: 'Construction',  proOnly: true, cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: true,  uvA: false, uvB: false, burn: false, utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: true,  pollen: false } },
+  // Activities — free
+  cycling:      { name: 'Cycling',                    cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+  running:      { name: 'Running',                    cols: { hour: true, air: true, rh: true,  dew: false, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: true,  uvA: false, uvB: false, burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: false, pollen: true  } },
+  dogwalk:      { name: 'Dog Walking',                cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: false, cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: false, aqi: false, pollen: true  } },
+  // Activities — Pro
+  hiking:       { name: 'Hiking',        proOnly: true, cols: { hour: true, air: true, rh: false, dew: false, wind: true, dir: true,  cloud: true, sun: true,  direct: false, diffuse: false, tmrt: false, delta: false, utci: true,  uvA: true,  uvB: true,  burn: true,  utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+  photography:  { name: 'Photography',   proOnly: true, cols: { hour: true, air: true, rh: false, dew: false, wind: false, dir: false, cloud: true, sun: true,  direct: true,  diffuse: true,  tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: false, precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+  fishing:      { name: 'Fishing',       proOnly: true, cols: { hour: true, air: true, rh: false, dew: true,  wind: true, dir: true,  cloud: true, sun: false, direct: false, diffuse: false, tmrt: false, delta: false, utci: false, uvA: false, uvB: false, burn: false, utciP: true,  precip: true,  soilT: false, soilT6: false, soilM: false, concreteT: false, vehicleT: false, indoorT: false, managedT: false, vis: true,  aqi: false, pollen: false } },
+};
+
+// Pollen type options shown in the pulldown selector.
+export const POLLEN_TYPES = {
+  all_pollen:     { name: 'All pollen',     unit: 'grains/m³' },
+  grass_pollen:   { name: 'Grass pollen',   unit: 'grains/m³' },
+  birch_pollen:   { name: 'Birch pollen',   unit: 'grains/m³' },
+  alder_pollen:   { name: 'Alder pollen',   unit: 'grains/m³' },
+  mugwort_pollen: { name: 'Mugwort pollen', unit: 'grains/m³' },
+  olive_pollen:   { name: 'Olive pollen',   unit: 'grains/m³' },
+  ragweed_pollen: { name: 'Ragweed pollen', unit: 'grains/m³' },
+};
+
+// Left-to-right order of the profile buttons in the top filter bar.
+export const profileButtonOrder = ['basic', 'home', 'vehicle', 'alltemps', 'custom'];
+
+// Emoji glyph per place/activity variant.
+export const variantIcons = {
+  urban: '🏙️',
+  beach: '🏖️',
+  events: '🎪',
+  park: '🌳',
+  airport: '✈️',
+  festival: '⛺',
+  construction: '🏗️',
+  cycling: '🚴',
+  running: '🏃',
+  dogwalk: '🐾',
+  sailing: '⛵',
+  wintersports: '🎿',
+  naturist: '☀️',
+  hiking: '🏔️',
+  photography: '📸',
+  fishing: '🎣',
+};
+
+// Which variant keys appear in the Activities dropdown.
+export const activityVariantKeys = ['cycling', 'running', 'dogwalk', 'sailing', 'wintersports', 'naturist', 'hiking', 'photography', 'fishing'];
+
+// Which variant keys appear in the Places dropdown.
+export const placeVariantKeys = ['urban', 'beach', 'events', 'park', 'airport', 'festival', 'construction'];
+
+// Tooltip text shown when the user clicks/hovers a table column header.
+export const COL_DESCRIPTIONS = {
+  hour:      { title: 'Hour',             desc: 'Local wall-clock time for this forecast row. Each row covers one hour.' },
+  air:       { title: 'Air Temperature',  desc: 'Measured air temperature at 2 m above the ground. This is the standard thermometer reading — it does not account for sun, wind, or humidity.' },
+  rh:        { title: 'Relative Humidity', desc: 'How much moisture the air holds relative to its maximum capacity at that temperature. High RH makes warm days feel stickier and cold days feel rawer.' },
+  dew:       { title: 'Dew Point',        desc: 'The temperature at which air becomes saturated and moisture begins to condense. A useful measure of absolute humidity — above 16 °C it starts to feel muggy; above 21 °C it feels oppressive.' },
+  wind:      { title: 'Wind Speed',       desc: 'Mean wind speed at 10 m, with peak gust in brackets where significantly higher. Wind dramatically increases heat loss from exposed skin — the basis of wind chill.' },
+  dir:       { title: 'Wind Direction',   desc: 'The compass direction the wind is blowing from, shown as an arrow and abbreviated label (e.g. SW = south-westerly).' },
+  cloud:     { title: 'Cloud Cover',      desc: 'Total cloud cover as a percentage of the sky. High cloud blocks solar radiation and reduces both daytime heating and overnight cooling.' },
+  sun:       { title: 'Sun Elevation',    desc: 'The angle of the sun above the horizon in degrees. Below 0° the sun has set. The higher the elevation, the more intense the solar radiation reaching the ground.' },
+  direct:    { title: 'Direct Radiation', desc: 'Shortwave solar radiation arriving in a direct beam from the sun (W/m²). The primary driver of skin heating on sunny days.' },
+  diffuse:   { title: 'Diffuse Radiation', desc: 'Scattered solar radiation arriving from all directions across the sky (W/m²). Present even under cloud; contributes to overall solar load.' },
+  tmrt:      { title: 'Mean Radiant Temp', desc: 'The temperature a person\'s skin "sees" from all surrounding surfaces and the sun combined. Can exceed air temperature by 20–30 °C on a sunny day — this is why shade feels so much cooler.' },
+  delta:     { title: 'UTCI − Air Delta', desc: 'The difference between the UTCI felt temperature and the plain air temperature. A large positive value means solar radiation is adding significant heat stress beyond what the thermometer shows.' },
+  utci:      { title: 'UTCI',             desc: 'Universal Thermal Climate Index — the raw felt temperature combining air temp, humidity, wind, and solar radiation. Does not include precipitation effects.' },
+  uvA:       { title: 'UV-A Index',       desc: 'Estimated UV-A radiation index. UV-A penetrates deeper into the skin and contributes to long-term ageing and some skin cancers, even through glass.' },
+  uvB:       { title: 'UV-B Index',       desc: 'Estimated UV-B radiation index. UV-B causes sunburn and is the main driver of vitamin D production. Intensity depends strongly on solar elevation and cloud cover.' },
+  burn:      { title: 'Burn Time',        desc: 'Estimated time to reach one Minimal Erythemal Dose (MED) — the threshold for sunburn — based on the UV index and your selected skin type. This is a guide, not a medical measurement.' },
+  utciP:     { title: 'UTCI+P',           desc: 'SunScope\'s adjusted felt temperature: UTCI plus the soak-factor penalty for precipitation. Rain and snow on wet clothing can reduce the felt temperature by up to 8 °C.' },
+  precip:    { title: 'Precipitation',    desc: 'Expected rainfall or snowfall in mm per hour. Snow is shown in cm. Even light drizzle meaningfully reduces felt temperature when combined with wind.' },
+  soilT:     { title: 'Soil Temperature', desc: 'Temperature of the soil at the surface (0 cm depth). Useful for planting decisions — most seeds germinate above 7–10 °C.' },
+  soilT6:    { title: 'Soil Temp 6 cm',   desc: 'Temperature of the soil at 6 cm depth, the root zone for many crops and seedlings. Lags behind surface temperature by several hours.' },
+  soilM:     { title: 'Soil Moisture',    desc: 'Volumetric water content of the top 1 cm of soil (m³/m³). Values above 0.4 suggest saturated ground; below 0.2 indicates dry conditions.' },
+  concreteT: { title: 'Concrete Surface', desc: 'Estimated temperature of sun-exposed urban concrete or paving. Concrete absorbs more solar energy than grass and cannot cool itself through evaporation — surface temps can run 15–25 °C above air temperature on sunny days.' },
+  vehicleT:  { title: 'Vehicle Interior', desc: 'Estimated ambient cabin temperature inside a parked vehicle. Cars heat rapidly through thin body panels and glass; motorhomes and caravans are modelled as insulated occupied living spaces with retained warmth, lower glass gain, and slower heat response. Dangerous for children and pets above 35 °C; potentially fatal above 45 °C.' },
+  indoorT:   { title: 'Indoors',          desc: 'Estimated ambient temperature inside a selected building type with windows closed and no air conditioning. Accounts for retained warmth, window solar gain, internal gains, and thermal lag without repeatedly accumulating solar heat hour after hour.' },
+  managedT:  { title: 'Managed Indoors',  desc: 'Estimated indoor temperature with curtains closed and windows opened when outdoor air is cooler than inside — the standard UK heatwave advice. Curtains block most direct solar gain; smart ventilation pulls the temperature down during cooler periods.' },
+  vis:       { title: 'Visibility',       desc: 'Horizontal visibility in kilometres, sourced from the CAMS air quality model. Values below 1 km indicate fog or very thick haze; below 10 km suggests mist, smoke, or significant pollution. Relevant for driving, flying, and photography.' },
+  aqi:       { title: 'Air Quality Index', desc: 'European Air Quality Index (0–100+), combining PM2.5, PM10, ozone, nitrogen dioxide, and sulphur dioxide. 0–20 = Good; 20–40 = Fair; 40–60 = Moderate; 60–80 = Poor; 80–100 = Very Poor; 100+ = Extremely Poor. Sourced from Copernicus CAMS.' },
+  pollen:    { title: 'Pollen',           desc: 'Pollen concentration in grains per cubic metre for the selected pollen type, sourced from the Copernicus CAMS pollen forecast. Low = <10; Moderate = 10–50; High = 50–200; Very High = 200+. Values vary by species and season.' },
+};
diff --git a/assets/js/events.js b/assets/js/events.js
index 9d55511..469e6e3 100644
--- a/assets/js/events.js
+++ b/assets/js/events.js
@@ -1,20 +1,45 @@
 // ════════════════════════════════════════════════════════════════════════
 //  events.js — Cosmic & weather event engine for SunScope.
 //
+//  This is the public-facing barrel module. It composes the smaller files
+//  under ./events/ and exposes the same API as before, so callers
+//  (app.js, components.js) keep working without changes.
+//
 //  Returns the "active event" (or null) based on:
 //    1. PROMO_OVERRIDE  — manually set a message for promotions etc.
 //    2. Hardcoded cosmic calendar (eclipses, meteor showers, alignments)
 //    3. Weather-derived events (stargazing, sunset, heat spike, storm)
 //
-//  To set a promo banner, edit PROMO_OVERRIDE near the top of this file.
+//  To set a promo banner, edit PROMO_OVERRIDE below.
 //  Set it back to null when done.
 //
 //  Each event object:
 //    { id, emoji, title, message, color, textColor, type }
 //
 //  type: 'cosmic' | 'weather' | 'promo'
+//
+//  Where to find things:
+//    Cosmic calendar data ........ ./events/cosmic-calendar.js
+//    Almanac calendar data ....... ./events/almanac-calendar.js
+//    Weather check functions ..... ./events/weather-checks.js
+//    Dynamic message helper ...... ./events/dynamic-message.js
+//    Lens overlay SVG renderer ... ./events/lens-overlay.js
 // ════════════════════════════════════════════════════════════════════════
 
+import { COSMIC_CALENDAR } from './events/cosmic-calendar.js';
+import {
+  checkStargazing,
+  checkSunset,
+  checkHeatSpike,
+  checkStorm,
+  checkFrost,
+} from './events/weather-checks.js';
+import { dynamicCosmicMessage } from './events/dynamic-message.js';
+
+// Re-export so callers that imported these from events.js keep working.
+export { getUpcomingEvents } from './events/almanac-calendar.js';
+export { getLensOverlaySVG } from './events/lens-overlay.js';
+
 // ─── PROMO OVERRIDE ──────────────────────────────────────────────────────
 // Set this to show a custom banner regardless of weather or cosmic events.
 // Leave as null for automatic event detection.
@@ -32,708 +57,6 @@
 //
 export const PROMO_OVERRIDE = null;
 
-// ─── COSMIC CALENDAR ─────────────────────────────────────────────────────
-// Hardcoded events — these are known years in advance.
-// Each entry: { id, start: 'YYYY-MM-DD', end: 'YYYY-MM-DD', peak: 'YYYY-MM-DD' (optional), ...eventProps }
-// Active if today falls within [start, end] (inclusive).
-// Night-only events (meteor showers, eclipses) are marked nightOnly: true
-// so the cell icons only appear in night-time rows.
-
-const COSMIC_CALENDAR = [
-
-  // ── METEOR SHOWERS ──────────────────────────────────────────────────
-  {
-    id: 'quadrantids-2026',
-    emoji: '☄️',
-    title: 'Quadrantid Meteor Shower',
-    message: 'The Quadrantid meteor shower is active — up to 120 meteors/hour at peak. Best after midnight in a dark sky.',
-    color: '#2a1a5a',
-    textColor: '#e8d8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-01-01', end: '2026-01-05', peak: '2026-01-03',
-  },
-  {
-    id: 'lyrids-2026',
-    emoji: '☄️',
-    title: 'Lyrid Meteor Shower',
-    message: 'The Lyrid meteor shower peaks tonight — up to 20 meteors/hour from a dark sky after midnight.',
-    color: '#2a1a5a',
-    textColor: '#e8d8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-04-16', end: '2026-04-25', peak: '2026-04-22',
-  },
-  {
-    id: 'eta-aquariids-2026',
-    emoji: '☄️',
-    title: 'Eta Aquariid Meteor Shower',
-    message: 'The Eta Aquariid shower peaks tonight — fragments of Halley\'s Comet, up to 50/hour before dawn.',
-    color: '#2a1a5a',
-    textColor: '#e8d8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-04-19', end: '2026-05-28', peak: '2026-05-06',
-  },
-  {
-    id: 'perseids-2026',
-    emoji: '☄️',
-    title: 'Perseid Meteor Shower',
-    message: 'The Perseids are active — one of the best showers of the year, up to 100 meteors/hour at peak.',
-    color: '#3a1a00',
-    textColor: '#ffe8c0',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-07-17', end: '2026-08-24', peak: '2026-08-12',
-  },
-  {
-    id: 'orionids-2026',
-    emoji: '☄️',
-    title: 'Orionid Meteor Shower',
-    message: 'The Orionid shower peaks tonight — fast, bright meteors from Halley\'s Comet debris. Up to 25/hour.',
-    color: '#2a1a5a',
-    textColor: '#e8d8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-10-02', end: '2026-11-07', peak: '2026-10-21',
-  },
-  {
-    id: 'leonids-2026',
-    emoji: '☄️',
-    title: 'Leonid Meteor Shower',
-    message: 'The Leonid shower is active tonight — fast, bright meteors from comet Tempel-Tuttle.',
-    color: '#2a1a5a',
-    textColor: '#e8d8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-11-06', end: '2026-11-30', peak: '2026-11-17',
-  },
-  {
-    id: 'geminids-2026',
-    emoji: '☄️',
-    title: 'Geminid Meteor Shower',
-    message: 'The Geminids peak tonight — the best shower of the year, up to 150 meteors/hour. No moon interference.',
-    color: '#3a1a00',
-    textColor: '#ffe8c0',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-12-04', end: '2026-12-20', peak: '2026-12-13',
-  },
-  {
-    id: 'ursids-2026',
-    emoji: '☄️',
-    title: 'Ursid Meteor Shower',
-    message: 'The Ursid shower peaks tonight — a quieter festive shower near the winter solstice.',
-    color: '#2a1a5a',
-    textColor: '#e8d8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-12-17', end: '2026-12-26', peak: '2026-12-22',
-  },
-
-  // ── ECLIPSES ────────────────────────────────────────────────────────
-  {
-    id: 'solar-eclipse-2026-aug',
-    emoji: '🌑',
-    title: 'Total Solar Eclipse',
-    message: 'A total solar eclipse crosses Europe and North Africa today — look for rapid temperature drops and unusual animal behaviour even in partial zones.',
-    color: '#1a0a2a',
-    textColor: '#d8c8f8',
-    type: 'cosmic',
-    nightOnly: false,
-    start: '2026-08-12', end: '2026-08-12',
-  },
-  {
-    id: 'lunar-eclipse-2026-mar',
-    emoji: '🌕',
-    title: 'Total Lunar Eclipse',
-    message: 'A total lunar eclipse is visible tonight — the Moon turns deep red (a "Blood Moon") as it passes through Earth\'s shadow.',
-    color: '#3a0a0a',
-    textColor: '#ffd8d8',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-03-03', end: '2026-03-03',
-  },
-
-  // ── PLANETARY EVENTS ────────────────────────────────────────────────
-  {
-    id: 'saturn-opposition-2026',
-    emoji: '🪐',
-    title: 'Saturn at Opposition',
-    message: 'Saturn is at its closest and brightest tonight — visible all night long, rings tilted beautifully toward Earth.',
-    color: '#1a2a3a',
-    textColor: '#c8e8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-09-23', end: '2026-09-23',
-  },
-  {
-    id: 'jupiter-opposition-2026',
-    emoji: '🪐',
-    title: 'Jupiter at Opposition',
-    message: 'Jupiter is at its closest and brightest tonight — you can see its cloud bands with binoculars.',
-    color: '#1a2a3a',
-    textColor: '#c8e8ff',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-10-08', end: '2026-10-08',
-  },
-  {
-    id: 'mars-conjunction-2026',
-    emoji: '🔴',
-    title: 'Mars & Venus Conjunction',
-    message: 'Mars and Venus are remarkably close in the evening sky tonight — a striking pair visible to the naked eye.',
-    color: '#2a1520',
-    textColor: '#ffc8d8',
-    type: 'cosmic',
-    nightOnly: true,
-    start: '2026-06-30', end: '2026-07-02',
-  },
-
-  // ── 2027 METEOR SHOWERS ─────────────────────────────────────────────
-  {
-    id: 'quadrantids-2027',
-    emoji: '☄️',
-    title: 'Quadrantid Meteor Shower',
-    message: 'The Quadrantid meteor shower is active — up to 120 meteors/hour at peak. Best in the hours before dawn on 4 Jan from a dark site.',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-01-01', end: '2027-01-05', peak: '2027-01-04',
-  },
-  {
-    id: 'lyrids-2027',
-    emoji: '☄️',
-    title: 'Lyrid Meteor Shower',
-    message: 'The Lyrid meteor shower peaks — up to 20 meteors/hour after midnight. Note: bright waning gibbous moon may reduce visibility this year.',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-04-16', end: '2027-04-25', peak: '2027-04-23',
-  },
-  {
-    id: 'eta-aquariids-2027',
-    emoji: '☄️',
-    title: 'Eta Aquariid Meteor Shower',
-    message: 'The Eta Aquariids peak — fragments of Halley\'s Comet, up to 50/hour before dawn. New moon on 6 May means excellent dark skies this year.',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-04-19', end: '2027-05-28', peak: '2027-05-05',
-  },
-  {
-    id: 'perseids-2027',
-    emoji: '☄️',
-    title: 'Perseid Meteor Shower',
-    message: 'The Perseids are active — one of the best showers of the year, up to 100 meteors/hour at peak around 13 Aug.',
-    color: '#3a1a00', textColor: '#ffe8c0',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-07-17', end: '2027-08-24', peak: '2027-08-13',
-  },
-  {
-    id: 'orionids-2027',
-    emoji: '☄️',
-    title: 'Orionid Meteor Shower',
-    message: 'The Orionid shower peaks — fast, bright meteors from Halley\'s Comet debris. Up to 25/hour.',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-10-02', end: '2027-11-07', peak: '2027-10-21',
-  },
-  {
-    id: 'leonids-2027',
-    emoji: '☄️',
-    title: 'Leonid Meteor Shower',
-    message: 'The Leonid shower peaks — fast meteors from comet Tempel-Tuttle, up to 15/hour.',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-11-06', end: '2027-11-30', peak: '2027-11-17',
-  },
-  {
-    id: 'geminids-2027',
-    emoji: '☄️',
-    title: 'Geminid Meteor Shower',
-    message: 'The Geminids peak — the finest shower of the year, up to 150 meteors/hour, visible even before midnight.',
-    color: '#3a1a00', textColor: '#ffe8c0',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-12-04', end: '2027-12-20', peak: '2027-12-14',
-  },
-  {
-    id: 'ursids-2027',
-    emoji: '☄️',
-    title: 'Ursid Meteor Shower',
-    message: 'The Ursid shower peaks near the winter solstice — circumpolar, best from northern latitudes.',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-12-17', end: '2027-12-26', peak: '2027-12-22',
-  },
-
-  // ── 2027 ECLIPSES ───────────────────────────────────────────────────
-  {
-    id: 'annular-solar-eclipse-2027-feb',
-    emoji: '🌑',
-    title: 'Annular Solar Eclipse',
-    message: 'An annular solar eclipse creates a "ring of fire" effect — visible across parts of South America, Africa and the Indian Ocean.',
-    color: '#1a0a2a', textColor: '#d8c8f8',
-    type: 'cosmic', nightOnly: false,
-    start: '2027-02-06', end: '2027-02-06', peak: '2027-02-06',
-  },
-  {
-    id: 'total-solar-eclipse-2027-aug',
-    emoji: '🌑',
-    title: 'Total Solar Eclipse',
-    message: 'A spectacular total solar eclipse — the path of totality crosses Morocco, Spain, Algeria, Libya, Egypt and Saudi Arabia. One of the longest totalities of the century.',
-    color: '#1a0a2a', textColor: '#d8c8f8',
-    type: 'cosmic', nightOnly: false,
-    start: '2027-08-02', end: '2027-08-02', peak: '2027-08-02',
-  },
-
-  // ── 2027 PLANETARY EVENTS ───────────────────────────────────────────
-  {
-    id: 'mars-opposition-2027',
-    emoji: '🔴',
-    title: 'Mars at Opposition',
-    message: 'Mars is at its closest and brightest — a vivid red beacon visible all night long. Good binoculars will reveal its surface colour.',
-    color: '#2a1520', textColor: '#ffc8d8',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-02-19', end: '2027-02-19', peak: '2027-02-19',
-  },
-  {
-    id: 'venus-jupiter-conjunction-2027',
-    emoji: '🪐',
-    title: 'Venus & Jupiter Conjunction',
-    message: 'Venus and Jupiter appear strikingly close together in the evening sky — a dazzling naked-eye pairing of the two brightest planets.',
-    color: '#1a2a3a', textColor: '#c8e8ff',
-    type: 'cosmic', nightOnly: true,
-    start: '2027-08-23', end: '2027-08-27', peak: '2027-08-25',
-  },
-];
-
-// ─── WEATHER-DERIVED EVENTS ───────────────────────────────────────────────
-// Computed in real-time from the forecast data.
-// Each checker function receives (rows [, location]) and returns an event
-// object or null. rows = today's hourlyRows array.
-// location = { lat, lon, name, country }.
-//
-// To add a new weather event: write a checkXxx(rows, location) function
-// below and add it to the checks[] array inside getActiveEvents().
-
-function checkStargazing(rows) {
-  // Great stargazing: mostly clear night hours with low cloud
-  const nightRows = rows.filter(r => r.elev < -5);
-  if (nightRows.length < 3) return null;
-  const avgCloud = nightRows.reduce((s, r) => s + r.cc, 0) / nightRows.length;
-  if (avgCloud > 30) return null;
-  return {
-    id: 'stargazing',
-    emoji: '⭐',
-    title: 'Great Stargazing Tonight',
-    message: `Clear skies expected overnight at ${nightRows.length} hours with average ${Math.round(avgCloud)}% cloud — ideal conditions for stargazing.`,
-    color: '#080e1a',
-    textColor: '#c8dcff',
-    type: 'weather',
-    nightOnly: true,
-  };
-}
-
-function checkSunset(rows, location) {
-  // Find the actual sunset window: the LAST contiguous run of rows where
-  // solar elevation is in the golden/civil-twilight band (-3° to 8°).
-  // This distinguishes sunset from sunrise (which is the first such run).
-  const twilightIndices = rows
-    .map((r, i) => ({ r, i }))
-    .filter(({ r }) => r.elev > -3 && r.elev < 8);
-  if (twilightIndices.length === 0) return null;
-
-  // Split into runs separated by gaps (midday gap separates sunrise from sunset)
-  const runs = [];
-  let run = [twilightIndices[0]];
-  for (let k = 1; k < twilightIndices.length; k++) {
-    if (twilightIndices[k].i === twilightIndices[k - 1].i + 1) {
-      run.push(twilightIndices[k]);
-    } else {
-      runs.push(run);
-      run = [twilightIndices[k]];
-    }
-  }
-  runs.push(run);
-
-  // Use the LAST run (sunset). If only one run exists it's either sunrise-only
-  // or a single dusk window — use it but we'll label generically.
-  const sunsetRun = runs[runs.length - 1];
-  const sunsetRows = sunsetRun.map(({ r }) => r);
-  const isSunrise = runs.length === 1 && sunsetRows[0].elev < sunsetRows[sunsetRows.length - 1].elev;
-  // If sun is rising through the band this is a sunrise window, not sunset — skip.
-  if (isSunrise) return null;
-
-  const avgCloud = sunsetRows.reduce((s, r) => s + r.cc, 0) / sunsetRows.length;
-  const avgLowCloud = sunsetRows.reduce((s, r) => s + (r.ccLow || 0), 0) / sunsetRows.length;
-  if (avgLowCloud > 25) return null;
-  if (avgCloud < 5 || avgCloud > 75) return null;
-
-  // Store the ISO time range so getCellTagEvents can limit the icon to those hours
-  const firstISO = sunsetRun[0].r.iso;
-  const lastISO  = sunsetRun[sunsetRun.length - 1].r.iso;
-
-  return {
-    id: 'perfect-sunset',
-    emoji: '🌅',
-    title: 'Spectacular Sunset Conditions',
-    message: `Low cloud is clear near the horizon but high cloud will scatter the light — conditions look ideal for a vivid sunset near ${location.name}.`,
-    color: '#3a1a00',
-    textColor: '#ffe0b0',
-    type: 'weather',
-    nightOnly: false,
-    isoRange: [firstISO, lastISO],  // only show cell icon during these hours
-  };
-}
-
-function checkHeatSpike(rows) {
-  const maxTemp = Math.max(...rows.map(r => r.Ta).filter(isFinite));
-  if (maxTemp < 30) return null;
-  const severity = maxTemp >= 36 ? 'extreme' : maxTemp >= 33 ? 'severe' : 'notable';
-  const msgs = {
-    notable: `Temperatures reaching ${maxTemp.toFixed(1)}°C — above seasonal norms. Stay hydrated and avoid prolonged sun exposure.`,
-    severe:  `Heat warning: ${maxTemp.toFixed(1)}°C expected today. Risk of heat exhaustion for vulnerable people — keep cool and hydrated.`,
-    extreme: `Extreme heat alert: ${maxTemp.toFixed(1)}°C forecast. Risk of heat stroke — avoid outdoor activity during peak hours.`,
-  };
-  return {
-    id: 'heat-spike',
-    emoji: '🔥',
-    title: severity === 'extreme' ? 'Extreme Heat Alert' : severity === 'severe' ? 'Heat Warning' : 'Heat Spike Today',
-    message: msgs[severity],
-    color: severity === 'extreme' ? '#3a0000' : severity === 'severe' ? '#4a1000' : '#5a2000',
-    textColor: '#ffd0b0',
-    type: 'weather',
-    nightOnly: false,
-  };
-}
-
-function checkStorm(rows) {
-  const maxGust = Math.max(...rows.map(r => r.gust ?? r.va ?? 0).filter(isFinite));
-  const maxPrecip = Math.max(...rows.map(r => r.precip ?? 0).filter(isFinite));
-  if (maxGust < 15 && maxPrecip < 5) return null;
-  const isStorm = maxGust >= 20 || maxPrecip >= 10;
-  return {
-    id: 'storm',
-    emoji: '🌩️',
-    title: isStorm ? 'Storm Conditions Forecast' : 'Blustery & Wet Today',
-    message: isStorm
-      ? `Storm-level conditions expected — gusts to ${maxGust.toFixed(0)} m/s with heavy precipitation. Take care outdoors.`
-      : `Unsettled day ahead — windy with gusts to ${maxGust.toFixed(0)} m/s and ${maxPrecip.toFixed(1)} mm/h rain at peak.`,
-    color: '#1a2030',
-    textColor: '#c0d8f0',
-    type: 'weather',
-    nightOnly: false,
-  };
-}
-
-function checkFrost(rows) {
-  const minTemp = Math.min(...rows.map(r => r.Ta).filter(isFinite));
-  if (minTemp > 2) return null;
-  return {
-    id: 'frost',
-    emoji: '❄️',
-    title: minTemp <= 0 ? 'Freezing Conditions' : 'Frost Risk Tonight',
-    message: minTemp <= 0
-      ? `Temperatures dropping to ${minTemp.toFixed(1)}°C — ice on roads and surfaces is likely. Allow extra travel time.`
-      : `Temperatures near freezing tonight (${minTemp.toFixed(1)}°C) — frost possible on exposed surfaces and vehicles.`,
-    color: '#0a1a2a',
-    textColor: '#c8e8ff',
-    type: 'weather',
-    nightOnly: false,
-  };
-}
-
-// ─── ALMANAC CALENDAR ────────────────────────────────────────────────────
-// Extended calendar used for the "What's Coming" panel.
-// Includes all events from COSMIC_CALENDAR plus multi-year entries.
-// Each entry has a latHint: null = global, 'north' = better from northern
-// latitudes, 'south' = southern, 'path:...' = specific eclipse path note.
-
-const ALMANAC_CALENDAR = [
-  // 2026 events (covers rest of year from today)
-  {
-    id: 'lunar-eclipse-2026-mar',
-    emoji: '🌕',
-    title: 'Total Lunar Eclipse',
-    desc: 'The Moon turns deep red as it passes through Earth\'s shadow. Visible from Europe, Africa, and the Americas.',
-    start: '2026-03-03', peak: '2026-03-03',
-    color: '#3a0a0a', textColor: '#ffd8d8',
-    latHint: null,
-    type: 'eclipse',
-  },
-  {
-    id: 'lyrids-2026',
-    emoji: '☄️',
-    title: 'Lyrid Meteor Shower',
-    desc: 'Up to 20 meteors/hour at peak. Active Apr 16–25, best after midnight from a dark site.',
-    start: '2026-04-16', peak: '2026-04-22',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: 'north',
-    type: 'meteor',
-  },
-  {
-    id: 'eta-aquariids-2026',
-    emoji: '☄️',
-    title: 'Eta Aquariid Meteor Shower',
-    desc: 'Debris from Halley\'s Comet — up to 50/hour before dawn. Best from southern latitudes but visible worldwide.',
-    start: '2026-04-19', peak: '2026-05-06',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: 'south',
-    type: 'meteor',
-  },
-  {
-    id: 'mars-conjunction-2026',
-    emoji: '🔴',
-    title: 'Mars & Venus Conjunction',
-    desc: 'Mars and Venus appear strikingly close in the evening sky — a beautiful naked-eye pairing.',
-    start: '2026-06-30', peak: '2026-07-01',
-    color: '#2a1520', textColor: '#ffc8d8',
-    latHint: null,
-    type: 'planetary',
-  },
-  {
-    id: 'perseids-2026',
-    emoji: '☄️',
-    title: 'Perseid Meteor Shower',
-    desc: 'One of the best showers of the year — up to 100/hour at peak, no need for a telescope.',
-    start: '2026-07-17', peak: '2026-08-12',
-    color: '#3a1a00', textColor: '#ffe8c0',
-    latHint: 'north',
-    type: 'meteor',
-  },
-  {
-    id: 'solar-eclipse-2026-aug',
-    emoji: '🌑',
-    title: 'Total Solar Eclipse',
-    desc: 'The path of totality crosses Spain, Iceland, and Greenland. Partial eclipse visible across most of Europe.',
-    start: '2026-08-12', peak: '2026-08-12',
-    color: '#1a0a2a', textColor: '#d8c8f8',
-    latHint: 'path:Spain, Iceland, Greenland — partial eclipse across UK & Europe',
-    type: 'eclipse',
-  },
-  {
-    id: 'saturn-opposition-2026',
-    emoji: '🪐',
-    title: 'Saturn at Opposition',
-    desc: 'Saturn is at its closest and brightest — rings tilted beautifully toward Earth. Visible all night.',
-    start: '2026-09-23', peak: '2026-09-23',
-    color: '#1a2a3a', textColor: '#c8e8ff',
-    latHint: null,
-    type: 'planetary',
-  },
-  {
-    id: 'orionids-2026',
-    emoji: '☄️',
-    title: 'Orionid Meteor Shower',
-    desc: 'Fast, bright meteors from Halley\'s Comet — up to 25/hour. Active Oct 2 – Nov 7.',
-    start: '2026-10-02', peak: '2026-10-21',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: null,
-    type: 'meteor',
-  },
-  {
-    id: 'jupiter-opposition-2026',
-    emoji: '🪐',
-    title: 'Jupiter at Opposition',
-    desc: 'Jupiter at its closest — you can see its cloud bands and four Galilean moons with binoculars.',
-    start: '2026-10-08', peak: '2026-10-08',
-    color: '#1a2a3a', textColor: '#c8e8ff',
-    latHint: null,
-    type: 'planetary',
-  },
-  {
-    id: 'leonids-2026',
-    emoji: '☄️',
-    title: 'Leonid Meteor Shower',
-    desc: 'Fast, bright meteors from comet Tempel-Tuttle. Up to 15/hour at peak.',
-    start: '2026-11-06', peak: '2026-11-17',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: null,
-    type: 'meteor',
-  },
-  {
-    id: 'geminids-2026',
-    emoji: '☄️',
-    title: 'Geminid Meteor Shower',
-    desc: 'The finest shower of the year — up to 150 meteors/hour, visible even before midnight.',
-    start: '2026-12-04', peak: '2026-12-13',
-    color: '#3a1a00', textColor: '#ffe8c0',
-    latHint: 'north',
-    type: 'meteor',
-  },
-  {
-    id: 'ursids-2026',
-    emoji: '☄️',
-    title: 'Ursid Meteor Shower',
-    desc: 'A quieter shower near the winter solstice — circumpolar, so best from northern latitudes.',
-    start: '2026-12-17', peak: '2026-12-22',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: 'north',
-    type: 'meteor',
-  },
-
-  // ── 2027 ─────────────────────────────────────────────────────────────
-  {
-    id: 'quadrantids-2027',
-    emoji: '☄️',
-    title: 'Quadrantid Meteor Shower',
-    desc: 'Up to 120 meteors/hour at peak — one of the strongest showers but with a very sharp peak. Best in the hours before dawn on 4 Jan.',
-    start: '2027-01-01', peak: '2027-01-04',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: 'north',
-    type: 'meteor',
-  },
-  {
-    id: 'annular-solar-eclipse-2027-feb',
-    emoji: '🌑',
-    title: 'Annular Solar Eclipse',
-    desc: 'A "ring of fire" eclipse visible from parts of South America, Africa and the Indian Ocean. Partial eclipse across much of the southern hemisphere.',
-    start: '2027-02-06', peak: '2027-02-06',
-    color: '#1a0a2a', textColor: '#d8c8f8',
-    latHint: 'path:South America, southern Africa, Indian Ocean',
-    type: 'eclipse',
-  },
-  {
-    id: 'mars-opposition-2027',
-    emoji: '🔴',
-    title: 'Mars at Opposition',
-    desc: 'Mars is at its closest and brightest — a vivid red beacon visible all night long. Good binoculars reveal its distinct colour.',
-    start: '2027-02-19', peak: '2027-02-19',
-    color: '#2a1520', textColor: '#ffc8d8',
-    latHint: null,
-    type: 'planetary',
-  },
-  {
-    id: 'lyrids-2027',
-    emoji: '☄️',
-    title: 'Lyrid Meteor Shower',
-    desc: 'Up to 20 meteors/hour at peak. Note: bright waning gibbous moon may reduce visibility this year. Active Apr 16–25.',
-    start: '2027-04-16', peak: '2027-04-23',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: 'north',
-    type: 'meteor',
-  },
-  {
-    id: 'eta-aquariids-2027',
-    emoji: '☄️',
-    title: 'Eta Aquariid Meteor Shower',
-    desc: 'Debris from Halley\'s Comet — up to 50/hour before dawn. New moon on 6 May means excellent dark skies this year.',
-    start: '2027-04-19', peak: '2027-05-05',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: 'south',
-    type: 'meteor',
-  },
-  {
-    id: 'perseids-2027',
-    emoji: '☄️',
-    title: 'Perseid Meteor Shower',
-    desc: 'One of the best showers of the year — up to 100/hour at peak, no telescope needed. Active Jul 17 – Aug 24.',
-    start: '2027-07-17', peak: '2027-08-13',
-    color: '#3a1a00', textColor: '#ffe8c0',
-    latHint: 'north',
-    type: 'meteor',
-  },
-  {
-    id: 'total-solar-eclipse-2027-aug',
-    emoji: '🌑',
-    title: 'Total Solar Eclipse',
-    desc: 'One of the longest total solar eclipses of the century. Path of totality crosses Morocco, Spain, Algeria, Libya, Egypt and Saudi Arabia.',
-    start: '2027-08-02', peak: '2027-08-02',
-    color: '#1a0a2a', textColor: '#d8c8f8',
-    latHint: 'path:Morocco, Spain, Algeria, Libya, Egypt, Saudi Arabia',
-    type: 'eclipse',
-  },
-  {
-    id: 'venus-jupiter-conjunction-2027',
-    emoji: '🪐',
-    title: 'Venus & Jupiter Conjunction',
-    desc: 'Venus and Jupiter appear strikingly close together in the evening sky — a dazzling naked-eye pairing of the two brightest planets.',
-    start: '2027-08-23', peak: '2027-08-25',
-    color: '#1a2a3a', textColor: '#c8e8ff',
-    latHint: null,
-    type: 'planetary',
-  },
-  {
-    id: 'orionids-2027',
-    emoji: '☄️',
-    title: 'Orionid Meteor Shower',
-    desc: 'Fast, bright meteors from Halley\'s Comet debris — up to 25/hour. Active Oct 2 – Nov 7.',
-    start: '2027-10-02', peak: '2027-10-21',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: null,
-    type: 'meteor',
-  },
-  {
-    id: 'leonids-2027',
-    emoji: '☄️',
-    title: 'Leonid Meteor Shower',
-    desc: 'Fast meteors from comet Tempel-Tuttle. Up to 15/hour at peak. Active Nov 6–30.',
-    start: '2027-11-06', peak: '2027-11-17',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: null,
-    type: 'meteor',
-  },
-  {
-    id: 'geminids-2027',
-    emoji: '☄️',
-    title: 'Geminid Meteor Shower',
-    desc: 'The finest shower of the year — up to 150 meteors/hour, visible even before midnight. Active Dec 4–20.',
-    start: '2027-12-04', peak: '2027-12-14',
-    color: '#3a1a00', textColor: '#ffe8c0',
-    latHint: 'north',
-    type: 'meteor',
-  },
-  {
-    id: 'ursids-2027',
-    emoji: '☄️',
-    title: 'Ursid Meteor Shower',
-    desc: 'A quieter shower near the winter solstice — circumpolar, best from northern latitudes. Active Dec 17–26.',
-    start: '2027-12-17', peak: '2027-12-22',
-    color: '#2a1a5a', textColor: '#e8d8ff',
-    latHint: 'north',
-    type: 'meteor',
-  },
-];
-
-// Returns a location-aware visibility note for an almanac entry.
-// lat = user's latitude.
-function getVisibilityNote(entry, lat) {
-  if (!entry.latHint) return null;
-  if (entry.latHint.startsWith('path:')) {
-    return entry.latHint.replace('path:', '').trim();
-  }
-  if (entry.latHint === 'north') {
-    if (lat >= 45) return 'Well placed for your latitude';
-    if (lat >= 20) return 'Visible from your location';
-    return 'Better from northern latitudes';
-  }
-  if (entry.latHint === 'south') {
-    if (lat <= 10) return 'Well placed for your latitude';
-    if (lat <= 40) return 'Visible from your location';
-    return 'Better from southern latitudes';
-  }
-  return null;
-}
-
-// ─── MAIN ALMANAC EXPORT ─────────────────────────────────────────────────
-// Returns events with peak dates in the next `days` days (default 90),
-// sorted by peak date, with a visibility note added.
-export function getUpcomingEvents(location, days = 90) {
-  const today = new Date();
-  today.setHours(0, 0, 0, 0);
-  const cutoff = new Date(today);
-  cutoff.setDate(cutoff.getDate() + days);
-  const todayStr = today.toISOString().slice(0, 10);
-  const cutoffStr = cutoff.toISOString().slice(0, 10);
-
-  return ALMANAC_CALENDAR
-    .filter(ev => ev.peak >= todayStr && ev.peak <= cutoffStr)
-    .sort((a, b) => a.peak.localeCompare(b.peak))
-    .map(ev => ({
-      ...ev,
-      visibilityNote: getVisibilityNote(ev, location?.lat ?? 51),
-      daysUntil: Math.round((new Date(ev.peak + 'T00:00Z') - today) / 86400000),
-    }));
-}
-
 // ─── CELL TAG LOGIC ──────────────────────────────────────────────────────
 // Returns the subset of active events that should show an icon for this row.
 export function getCellTagEvents(events, row) {
@@ -750,33 +73,6 @@ export function getCellTagEvents(events, row) {
   });
 }
 
-
-// ─── DYNAMIC MESSAGE GENERATOR ───────────────────────────────────────────
-// Rewrites a cosmic event's message based on where today sits vs. the peak.
-//   Before peak : "is active and building — peak on <date>. <detail>"
-//   On peak ±1d : "peaks tonight — <detail>"
-//   After peak  : "is past its peak (<date>) but still possibly visible — <detail>"
-// Single-day events (start === end) keep their static message unchanged.
-
-function dynamicCosmicMessage(ev, dateStr) {
-  if (!ev.peak || ev.start === ev.end) return ev.message;
-  var today    = new Date(dateStr + 'T00:00Z');
-  var peak     = new Date(ev.peak  + 'T00:00Z');
-  var diffDays = Math.round((today - peak) / 86400000);
-  var peakFmt  = peak.toLocaleDateString('en-GB', { day: 'numeric', month: 'short', timeZone: 'UTC' });
-  var base = ev.message
-    .replace(/^.*?(?:peaks tonight|peak tonight|is active tonight|is active|peaks)\s*—\s*/i, '')
-    .trim();
-  var baseCapd = base.charAt(0).toUpperCase() + base.slice(1);
-  if (diffDays < -1) {
-    return ev.title + ' is active and building — peak on ' + peakFmt + '. ' + baseCapd;
-  } else if (diffDays <= 1) {
-    return ev.title + ' peaks tonight — ' + base;
-  } else {
-    return ev.title + ' is past its peak (' + peakFmt + ') but still possibly visible — ' + base;
-  }
-}
-
 // ─── MAIN EXPORT ─────────────────────────────────────────────────────────
 // Returns ALL active events for the given rows/date as an array.
 // Empty array = nothing active.
@@ -831,96 +127,3 @@ export function getLensEvent(events) {
     return distE < distB ? ev : best;
   });
 }
-
-// ─── LENS OVERLAY RENDERER ───────────────────────────────────────────────
-// Returns an SVG string for the event overlay inside the big ScopeReticle.
-// Rendered INSIDE the lens clip path, BELOW the glass shine/shade layers.
-// cx, cy = lens centre coords; lensR = lens radius.
-export function getLensOverlaySVG(event, cx, cy, lensR) {
-  if (!event) return null;
-  const id = event.id;
-
-  if (event.emoji === '☄️') {
-    return [
-      '<g opacity="0.55" clip-path="url(#scope-lens-clip)">',
-      '<line x1="' + (cx-60) + '" y1="' + (cy-50) + '" x2="' + (cx-20) + '" y2="' + (cy-20) + '" stroke="#ffe8a0" stroke-width="1.5" stroke-linecap="round" opacity="0.9"/>',
-      '<line x1="' + (cx-40) + '" y1="' + (cy-70) + '" x2="' + (cx+5) + '" y2="' + (cy-30) + '" stroke="#fff0c0" stroke-width="1" stroke-linecap="round" opacity="0.7"/>',
-      '<line x1="' + (cx+30) + '" y1="' + (cy-60) + '" x2="' + (cx+65) + '" y2="' + (cy-25) + '" stroke="#ffe8a0" stroke-width="1.8" stroke-linecap="round" opacity="0.8"/>',
-      '<line x1="' + (cx-10) + '" y1="' + (cy-40) + '" x2="' + (cx+30) + '" y2="' + (cy-5) + '" stroke="#fff0c0" stroke-width="0.9" stroke-linecap="round" opacity="0.65"/>',
-      '<line x1="' + (cx-70) + '" y1="' + (cy-20) + '" x2="' + (cx-35) + '" y2="' + (cy+10) + '" stroke="#ffe8a0" stroke-width="1.2" stroke-linecap="round" opacity="0.6"/>',
-      '</g>',
-    ].join('');
-  }
-
-  if (id.includes('solar-eclipse')) {
-    const cx_ = cx, cy_ = cy - 20;
-    return '<g clip-path="url(#scope-lens-clip)">'
-      + '<radialGradient id="corona-glow" cx="' + cx_ + '" cy="' + cy_ + '" r="38" gradientUnits="userSpaceOnUse">'
-      + '<stop offset="0%" stop-color="rgba(255,220,100,0)" />'
-      + '<stop offset="55%" stop-color="rgba(255,220,100,0.55)" />'
-      + '<stop offset="100%" stop-color="rgba(255,180,40,0)" /></radialGradient>'
-      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="38" fill="url(#corona-glow)" opacity="0.8" />'
-      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="18" fill="rgba(5,2,15,0.88)" /></g>';
-  }
-
-  if (id.includes('lunar-eclipse')) {
-    const cx_ = cx, cy_ = cy - 30;
-    return '<g clip-path="url(#scope-lens-clip)">'
-      + '<radialGradient id="blood-moon-glow" cx="' + cx_ + '" cy="' + cy_ + '" r="30" gradientUnits="userSpaceOnUse">'
-      + '<stop offset="0%" stop-color="rgba(180,30,10,0.7)" />'
-      + '<stop offset="100%" stop-color="rgba(120,10,5,0)" /></radialGradient>'
-      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="30" fill="url(#blood-moon-glow)" />'
-      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="16" fill="rgba(160,25,10,0.75)" />'
-      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="16" fill="none" stroke="rgba(220,60,20,0.5)" stroke-width="1.5" /></g>';
-  }
-
-  if (event.emoji === '🪐' && event.id.includes('conjunction')) {
-    return '<g clip-path="url(#scope-lens-clip)" opacity="0.65">'
-      + '<circle cx="' + (cx+20) + '" cy="' + (cy-35) + '" r="10" fill="rgba(210,185,130,0.7)" />'
-      + '<ellipse cx="' + (cx+20) + '" cy="' + (cy-35) + '" rx="18" ry="4.5" fill="none" stroke="rgba(200,170,100,0.65)" stroke-width="2.5" /></g>';
-  }
-
-  if (event.emoji === '🔴') {
-    return '<g clip-path="url(#scope-lens-clip)" opacity="0.6">'
-      + '<circle cx="' + (cx+30) + '" cy="' + (cy-30) + '" r="7" fill="rgba(200,80,40,0.75)" />'
-      + '<circle cx="' + (cx-20) + '" cy="' + (cy-45) + '" r="5" fill="rgba(220,160,80,0.7)" /></g>';
-  }
-
-  if (id === 'stargazing') {
-    const pts = [[cx-50,cy-55,1.8],[cx+40,cy-65,1.4],[cx-20,cy-70,1.0],[cx+65,cy-40,1.6],[cx-60,cy-30,1.2],[cx+50,cy-55,1.0],[cx-35,cy-45,1.4],[cx+20,cy-50,1.8],[cx-75,cy-50,1.0]];
-    const dots = pts.map(function(s){return '<circle cx="'+s[0]+'" cy="'+s[1]+'" r="'+s[2]+'" fill="rgba(255,255,255,0.9)" />';}).join('');
-    return '<g clip-path="url(#scope-lens-clip)" opacity="0.7">' + dots + '</g>';
-  }
-
-  if (id === 'perfect-sunset') {
-    return '<g clip-path="url(#scope-lens-clip)" opacity="0.5">'
-      + '<radialGradient id="sunset-lens-glow" cx="' + cx + '" cy="' + (cy+20) + '" r="' + lensR + '" gradientUnits="userSpaceOnUse">'
-      + '<stop offset="0%" stop-color="rgba(255,120,20,0.7)" />'
-      + '<stop offset="50%" stop-color="rgba(255,60,10,0.25)" />'
-      + '<stop offset="100%" stop-color="rgba(200,20,0,0)" /></radialGradient>'
-      + '<circle cx="' + cx + '" cy="' + cy + '" r="' + lensR + '" fill="url(#sunset-lens-glow)" /></g>';
-  }
-
-  if (id === 'heat-spike') {
-    return '<g clip-path="url(#scope-lens-clip)" opacity="0.35">'
-      + '<path d="M ' + (cx-lensR+10) + ' ' + (cy+30) + ' Q ' + (cx-20) + ' ' + (cy+15) + ' ' + (cx+20) + ' ' + (cy+30) + ' Q ' + (cx+60) + ' ' + (cy+45) + ' ' + (cx+lensR-10) + ' ' + (cy+30) + '" fill="none" stroke="rgba(255,120,20,0.6)" stroke-width="2" />'
-      + '<path d="M ' + (cx-lensR+10) + ' ' + (cy+45) + ' Q ' + (cx-10) + ' ' + (cy+30) + ' ' + (cx+30) + ' ' + (cy+45) + ' Q ' + (cx+65) + ' ' + (cy+60) + ' ' + (cx+lensR-10) + ' ' + (cy+45) + '" fill="none" stroke="rgba(255,100,10,0.5)" stroke-width="2" /></g>';
-  }
-
-  if (id === 'storm') {
-    const sl = [-55,-30,-5,20,45,65].map(function(x){
-      return '<line x1="' + (cx+x) + '" y1="' + (cy-lensR+10) + '" x2="' + (cx+x-15) + '" y2="' + (cy+lensR-10) + '" stroke="rgba(140,180,220,0.6)" stroke-width="1" stroke-linecap="round" />';
-    }).join('');
-    return '<g clip-path="url(#scope-lens-clip)" opacity="0.45">' + sl + '</g>';
-  }
-
-  if (id === 'frost') {
-    const fc = [[-50,40],[0,55],[50,40],[-30,65],[30,65]].map(function(p){
-      var dx=p[0], dy=p[1];
-      return '<g transform="translate(' + (cx+dx) + ',' + (cy+dy) + ')"><line x1="-6" y1="0" x2="6" y2="0" stroke="rgba(180,220,255,0.8)" stroke-width="1" /><line x1="0" y1="-6" x2="0" y2="6" stroke="rgba(180,220,255,0.8)" stroke-width="1" /><line x1="-4" y1="-4" x2="4" y2="4" stroke="rgba(180,220,255,0.7)" stroke-width="0.8" /><line x1="4" y1="-4" x2="-4" y2="4" stroke="rgba(180,220,255,0.7)" stroke-width="0.8" /></g>';
-    }).join('');
-    return '<g clip-path="url(#scope-lens-clip)" opacity="0.5">' + fc + '</g>';
-  }
-
-  return null;
-}
diff --git a/assets/js/events/almanac-calendar.js b/assets/js/events/almanac-calendar.js
new file mode 100644
index 0000000..f3c999e
--- /dev/null
+++ b/assets/js/events/almanac-calendar.js
@@ -0,0 +1,298 @@
+// ════════════════════════════════════════════════════════════════════════
+//  almanac-calendar.js — Extended event calendar for the "What's Coming"
+//  panel and getUpcomingEvents() export.
+//
+//  Includes all events from COSMIC_CALENDAR plus multi-year entries.
+//  Each entry has a `latHint`:
+//    null         = global / no hint
+//    'north'      = better from northern latitudes
+//    'south'      = better from southern latitudes
+//    'path:...'   = specific eclipse path note
+// ════════════════════════════════════════════════════════════════════════
+
+export const ALMANAC_CALENDAR = [
+  // 2026 events (covers rest of year from today)
+  {
+    id: 'lunar-eclipse-2026-mar',
+    emoji: '🌕',
+    title: 'Total Lunar Eclipse',
+    desc: 'The Moon turns deep red as it passes through Earth\'s shadow. Visible from Europe, Africa, and the Americas.',
+    start: '2026-03-03', peak: '2026-03-03',
+    color: '#3a0a0a', textColor: '#ffd8d8',
+    latHint: null,
+    type: 'eclipse',
+  },
+  {
+    id: 'lyrids-2026',
+    emoji: '☄️',
+    title: 'Lyrid Meteor Shower',
+    desc: 'Up to 20 meteors/hour at peak. Active Apr 16–25, best after midnight from a dark site.',
+    start: '2026-04-16', peak: '2026-04-22',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: 'north',
+    type: 'meteor',
+  },
+  {
+    id: 'eta-aquariids-2026',
+    emoji: '☄️',
+    title: 'Eta Aquariid Meteor Shower',
+    desc: 'Debris from Halley\'s Comet — up to 50/hour before dawn. Best from southern latitudes but visible worldwide.',
+    start: '2026-04-19', peak: '2026-05-06',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: 'south',
+    type: 'meteor',
+  },
+  {
+    id: 'mars-conjunction-2026',
+    emoji: '🔴',
+    title: 'Mars & Venus Conjunction',
+    desc: 'Mars and Venus appear strikingly close in the evening sky — a beautiful naked-eye pairing.',
+    start: '2026-06-30', peak: '2026-07-01',
+    color: '#2a1520', textColor: '#ffc8d8',
+    latHint: null,
+    type: 'planetary',
+  },
+  {
+    id: 'perseids-2026',
+    emoji: '☄️',
+    title: 'Perseid Meteor Shower',
+    desc: 'One of the best showers of the year — up to 100/hour at peak, no need for a telescope.',
+    start: '2026-07-17', peak: '2026-08-12',
+    color: '#3a1a00', textColor: '#ffe8c0',
+    latHint: 'north',
+    type: 'meteor',
+  },
+  {
+    id: 'solar-eclipse-2026-aug',
+    emoji: '🌑',
+    title: 'Total Solar Eclipse',
+    desc: 'The path of totality crosses Spain, Iceland, and Greenland. Partial eclipse visible across most of Europe.',
+    start: '2026-08-12', peak: '2026-08-12',
+    color: '#1a0a2a', textColor: '#d8c8f8',
+    latHint: 'path:Spain, Iceland, Greenland — partial eclipse across UK & Europe',
+    type: 'eclipse',
+  },
+  {
+    id: 'saturn-opposition-2026',
+    emoji: '🪐',
+    title: 'Saturn at Opposition',
+    desc: 'Saturn is at its closest and brightest — rings tilted beautifully toward Earth. Visible all night.',
+    start: '2026-09-23', peak: '2026-09-23',
+    color: '#1a2a3a', textColor: '#c8e8ff',
+    latHint: null,
+    type: 'planetary',
+  },
+  {
+    id: 'orionids-2026',
+    emoji: '☄️',
+    title: 'Orionid Meteor Shower',
+    desc: 'Fast, bright meteors from Halley\'s Comet — up to 25/hour. Active Oct 2 – Nov 7.',
+    start: '2026-10-02', peak: '2026-10-21',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: null,
+    type: 'meteor',
+  },
+  {
+    id: 'jupiter-opposition-2026',
+    emoji: '🪐',
+    title: 'Jupiter at Opposition',
+    desc: 'Jupiter at its closest — you can see its cloud bands and four Galilean moons with binoculars.',
+    start: '2026-10-08', peak: '2026-10-08',
+    color: '#1a2a3a', textColor: '#c8e8ff',
+    latHint: null,
+    type: 'planetary',
+  },
+  {
+    id: 'leonids-2026',
+    emoji: '☄️',
+    title: 'Leonid Meteor Shower',
+    desc: 'Fast, bright meteors from comet Tempel-Tuttle. Up to 15/hour at peak.',
+    start: '2026-11-06', peak: '2026-11-17',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: null,
+    type: 'meteor',
+  },
+  {
+    id: 'geminids-2026',
+    emoji: '☄️',
+    title: 'Geminid Meteor Shower',
+    desc: 'The finest shower of the year — up to 150 meteors/hour, visible even before midnight.',
+    start: '2026-12-04', peak: '2026-12-13',
+    color: '#3a1a00', textColor: '#ffe8c0',
+    latHint: 'north',
+    type: 'meteor',
+  },
+  {
+    id: 'ursids-2026',
+    emoji: '☄️',
+    title: 'Ursid Meteor Shower',
+    desc: 'A quieter shower near the winter solstice — circumpolar, so best from northern latitudes.',
+    start: '2026-12-17', peak: '2026-12-22',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: 'north',
+    type: 'meteor',
+  },
+
+  // ── 2027 ─────────────────────────────────────────────────────────────
+  {
+    id: 'quadrantids-2027',
+    emoji: '☄️',
+    title: 'Quadrantid Meteor Shower',
+    desc: 'Up to 120 meteors/hour at peak — one of the strongest showers but with a very sharp peak. Best in the hours before dawn on 4 Jan.',
+    start: '2027-01-01', peak: '2027-01-04',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: 'north',
+    type: 'meteor',
+  },
+  {
+    id: 'annular-solar-eclipse-2027-feb',
+    emoji: '🌑',
+    title: 'Annular Solar Eclipse',
+    desc: 'A "ring of fire" eclipse visible from parts of South America, Africa and the Indian Ocean. Partial eclipse across much of the southern hemisphere.',
+    start: '2027-02-06', peak: '2027-02-06',
+    color: '#1a0a2a', textColor: '#d8c8f8',
+    latHint: 'path:South America, southern Africa, Indian Ocean',
+    type: 'eclipse',
+  },
+  {
+    id: 'mars-opposition-2027',
+    emoji: '🔴',
+    title: 'Mars at Opposition',
+    desc: 'Mars is at its closest and brightest — a vivid red beacon visible all night long. Good binoculars reveal its distinct colour.',
+    start: '2027-02-19', peak: '2027-02-19',
+    color: '#2a1520', textColor: '#ffc8d8',
+    latHint: null,
+    type: 'planetary',
+  },
+  {
+    id: 'lyrids-2027',
+    emoji: '☄️',
+    title: 'Lyrid Meteor Shower',
+    desc: 'Up to 20 meteors/hour at peak. Note: bright waning gibbous moon may reduce visibility this year. Active Apr 16–25.',
+    start: '2027-04-16', peak: '2027-04-23',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: 'north',
+    type: 'meteor',
+  },
+  {
+    id: 'eta-aquariids-2027',
+    emoji: '☄️',
+    title: 'Eta Aquariid Meteor Shower',
+    desc: 'Debris from Halley\'s Comet — up to 50/hour before dawn. New moon on 6 May means excellent dark skies this year.',
+    start: '2027-04-19', peak: '2027-05-05',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: 'south',
+    type: 'meteor',
+  },
+  {
+    id: 'perseids-2027',
+    emoji: '☄️',
+    title: 'Perseid Meteor Shower',
+    desc: 'One of the best showers of the year — up to 100/hour at peak, no telescope needed. Active Jul 17 – Aug 24.',
+    start: '2027-07-17', peak: '2027-08-13',
+    color: '#3a1a00', textColor: '#ffe8c0',
+    latHint: 'north',
+    type: 'meteor',
+  },
+  {
+    id: 'total-solar-eclipse-2027-aug',
+    emoji: '🌑',
+    title: 'Total Solar Eclipse',
+    desc: 'One of the longest total solar eclipses of the century. Path of totality crosses Morocco, Spain, Algeria, Libya, Egypt and Saudi Arabia.',
+    start: '2027-08-02', peak: '2027-08-02',
+    color: '#1a0a2a', textColor: '#d8c8f8',
+    latHint: 'path:Morocco, Spain, Algeria, Libya, Egypt, Saudi Arabia',
+    type: 'eclipse',
+  },
+  {
+    id: 'venus-jupiter-conjunction-2027',
+    emoji: '🪐',
+    title: 'Venus & Jupiter Conjunction',
+    desc: 'Venus and Jupiter appear strikingly close together in the evening sky — a dazzling naked-eye pairing of the two brightest planets.',
+    start: '2027-08-23', peak: '2027-08-25',
+    color: '#1a2a3a', textColor: '#c8e8ff',
+    latHint: null,
+    type: 'planetary',
+  },
+  {
+    id: 'orionids-2027',
+    emoji: '☄️',
+    title: 'Orionid Meteor Shower',
+    desc: 'Fast, bright meteors from Halley\'s Comet debris — up to 25/hour. Active Oct 2 – Nov 7.',
+    start: '2027-10-02', peak: '2027-10-21',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: null,
+    type: 'meteor',
+  },
+  {
+    id: 'leonids-2027',
+    emoji: '☄️',
+    title: 'Leonid Meteor Shower',
+    desc: 'Fast meteors from comet Tempel-Tuttle. Up to 15/hour at peak. Active Nov 6–30.',
+    start: '2027-11-06', peak: '2027-11-17',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: null,
+    type: 'meteor',
+  },
+  {
+    id: 'geminids-2027',
+    emoji: '☄️',
+    title: 'Geminid Meteor Shower',
+    desc: 'The finest shower of the year — up to 150 meteors/hour, visible even before midnight. Active Dec 4–20.',
+    start: '2027-12-04', peak: '2027-12-14',
+    color: '#3a1a00', textColor: '#ffe8c0',
+    latHint: 'north',
+    type: 'meteor',
+  },
+  {
+    id: 'ursids-2027',
+    emoji: '☄️',
+    title: 'Ursid Meteor Shower',
+    desc: 'A quieter shower near the winter solstice — circumpolar, best from northern latitudes. Active Dec 17–26.',
+    start: '2027-12-17', peak: '2027-12-22',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    latHint: 'north',
+    type: 'meteor',
+  },
+];
+
+// Returns a location-aware visibility note for an almanac entry.
+// lat = user's latitude.
+export function getVisibilityNote(entry, lat) {
+  if (!entry.latHint) return null;
+  if (entry.latHint.startsWith('path:')) {
+    return entry.latHint.replace('path:', '').trim();
+  }
+  if (entry.latHint === 'north') {
+    if (lat >= 45) return 'Well placed for your latitude';
+    if (lat >= 20) return 'Visible from your location';
+    return 'Better from northern latitudes';
+  }
+  if (entry.latHint === 'south') {
+    if (lat <= 10) return 'Well placed for your latitude';
+    if (lat <= 40) return 'Visible from your location';
+    return 'Better from southern latitudes';
+  }
+  return null;
+}
+
+// ─── MAIN ALMANAC EXPORT ─────────────────────────────────────────────────
+// Returns events with peak dates in the next `days` days (default 90),
+// sorted by peak date, with a visibility note added.
+export function getUpcomingEvents(location, days = 90) {
+  const today = new Date();
+  today.setHours(0, 0, 0, 0);
+  const cutoff = new Date(today);
+  cutoff.setDate(cutoff.getDate() + days);
+  const todayStr = today.toISOString().slice(0, 10);
+  const cutoffStr = cutoff.toISOString().slice(0, 10);
+
+  return ALMANAC_CALENDAR
+    .filter(ev => ev.peak >= todayStr && ev.peak <= cutoffStr)
+    .sort((a, b) => a.peak.localeCompare(b.peak))
+    .map(ev => ({
+      ...ev,
+      visibilityNote: getVisibilityNote(ev, location?.lat ?? 51),
+      daysUntil: Math.round((new Date(ev.peak + 'T00:00Z') - today) / 86400000),
+    }));
+}
diff --git a/assets/js/events/cosmic-calendar.js b/assets/js/events/cosmic-calendar.js
new file mode 100644
index 0000000..8fd428e
--- /dev/null
+++ b/assets/js/events/cosmic-calendar.js
@@ -0,0 +1,276 @@
+// ════════════════════════════════════════════════════════════════════════
+//  cosmic-calendar.js — Hardcoded cosmic events (meteor showers, eclipses,
+//  planetary oppositions/conjunctions) used by getActiveEvents.
+//
+//  Each entry: { id, start: 'YYYY-MM-DD', end: 'YYYY-MM-DD',
+//                peak: 'YYYY-MM-DD' (optional), ...eventProps }
+//  Active if today falls within [start, end] (inclusive).
+//  Night-only events (meteor showers, eclipses) are marked nightOnly: true
+//  so the cell icons only appear in night-time rows.
+// ════════════════════════════════════════════════════════════════════════
+
+export const COSMIC_CALENDAR = [
+
+  // ── METEOR SHOWERS ──────────────────────────────────────────────────
+  {
+    id: 'quadrantids-2026',
+    emoji: '☄️',
+    title: 'Quadrantid Meteor Shower',
+    message: 'The Quadrantid meteor shower is active — up to 120 meteors/hour at peak. Best after midnight in a dark sky.',
+    color: '#2a1a5a',
+    textColor: '#e8d8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-01-01', end: '2026-01-05', peak: '2026-01-03',
+  },
+  {
+    id: 'lyrids-2026',
+    emoji: '☄️',
+    title: 'Lyrid Meteor Shower',
+    message: 'The Lyrid meteor shower peaks tonight — up to 20 meteors/hour from a dark sky after midnight.',
+    color: '#2a1a5a',
+    textColor: '#e8d8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-04-16', end: '2026-04-25', peak: '2026-04-22',
+  },
+  {
+    id: 'eta-aquariids-2026',
+    emoji: '☄️',
+    title: 'Eta Aquariid Meteor Shower',
+    message: 'The Eta Aquariid shower peaks tonight — fragments of Halley\'s Comet, up to 50/hour before dawn.',
+    color: '#2a1a5a',
+    textColor: '#e8d8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-04-19', end: '2026-05-28', peak: '2026-05-06',
+  },
+  {
+    id: 'perseids-2026',
+    emoji: '☄️',
+    title: 'Perseid Meteor Shower',
+    message: 'The Perseids are active — one of the best showers of the year, up to 100 meteors/hour at peak.',
+    color: '#3a1a00',
+    textColor: '#ffe8c0',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-07-17', end: '2026-08-24', peak: '2026-08-12',
+  },
+  {
+    id: 'orionids-2026',
+    emoji: '☄️',
+    title: 'Orionid Meteor Shower',
+    message: 'The Orionid shower peaks tonight — fast, bright meteors from Halley\'s Comet debris. Up to 25/hour.',
+    color: '#2a1a5a',
+    textColor: '#e8d8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-10-02', end: '2026-11-07', peak: '2026-10-21',
+  },
+  {
+    id: 'leonids-2026',
+    emoji: '☄️',
+    title: 'Leonid Meteor Shower',
+    message: 'The Leonid shower is active tonight — fast, bright meteors from comet Tempel-Tuttle.',
+    color: '#2a1a5a',
+    textColor: '#e8d8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-11-06', end: '2026-11-30', peak: '2026-11-17',
+  },
+  {
+    id: 'geminids-2026',
+    emoji: '☄️',
+    title: 'Geminid Meteor Shower',
+    message: 'The Geminids peak tonight — the best shower of the year, up to 150 meteors/hour. No moon interference.',
+    color: '#3a1a00',
+    textColor: '#ffe8c0',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-12-04', end: '2026-12-20', peak: '2026-12-13',
+  },
+  {
+    id: 'ursids-2026',
+    emoji: '☄️',
+    title: 'Ursid Meteor Shower',
+    message: 'The Ursid shower peaks tonight — a quieter festive shower near the winter solstice.',
+    color: '#2a1a5a',
+    textColor: '#e8d8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-12-17', end: '2026-12-26', peak: '2026-12-22',
+  },
+
+  // ── ECLIPSES ────────────────────────────────────────────────────────
+  {
+    id: 'solar-eclipse-2026-aug',
+    emoji: '🌑',
+    title: 'Total Solar Eclipse',
+    message: 'A total solar eclipse crosses Europe and North Africa today — look for rapid temperature drops and unusual animal behaviour even in partial zones.',
+    color: '#1a0a2a',
+    textColor: '#d8c8f8',
+    type: 'cosmic',
+    nightOnly: false,
+    start: '2026-08-12', end: '2026-08-12',
+  },
+  {
+    id: 'lunar-eclipse-2026-mar',
+    emoji: '🌕',
+    title: 'Total Lunar Eclipse',
+    message: 'A total lunar eclipse is visible tonight — the Moon turns deep red (a "Blood Moon") as it passes through Earth\'s shadow.',
+    color: '#3a0a0a',
+    textColor: '#ffd8d8',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-03-03', end: '2026-03-03',
+  },
+
+  // ── PLANETARY EVENTS ────────────────────────────────────────────────
+  {
+    id: 'saturn-opposition-2026',
+    emoji: '🪐',
+    title: 'Saturn at Opposition',
+    message: 'Saturn is at its closest and brightest tonight — visible all night long, rings tilted beautifully toward Earth.',
+    color: '#1a2a3a',
+    textColor: '#c8e8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-09-23', end: '2026-09-23',
+  },
+  {
+    id: 'jupiter-opposition-2026',
+    emoji: '🪐',
+    title: 'Jupiter at Opposition',
+    message: 'Jupiter is at its closest and brightest tonight — you can see its cloud bands with binoculars.',
+    color: '#1a2a3a',
+    textColor: '#c8e8ff',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-10-08', end: '2026-10-08',
+  },
+  {
+    id: 'mars-conjunction-2026',
+    emoji: '🔴',
+    title: 'Mars & Venus Conjunction',
+    message: 'Mars and Venus are remarkably close in the evening sky tonight — a striking pair visible to the naked eye.',
+    color: '#2a1520',
+    textColor: '#ffc8d8',
+    type: 'cosmic',
+    nightOnly: true,
+    start: '2026-06-30', end: '2026-07-02',
+  },
+
+  // ── 2027 METEOR SHOWERS ─────────────────────────────────────────────
+  {
+    id: 'quadrantids-2027',
+    emoji: '☄️',
+    title: 'Quadrantid Meteor Shower',
+    message: 'The Quadrantid meteor shower is active — up to 120 meteors/hour at peak. Best in the hours before dawn on 4 Jan from a dark site.',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-01-01', end: '2027-01-05', peak: '2027-01-04',
+  },
+  {
+    id: 'lyrids-2027',
+    emoji: '☄️',
+    title: 'Lyrid Meteor Shower',
+    message: 'The Lyrid meteor shower peaks — up to 20 meteors/hour after midnight. Note: bright waning gibbous moon may reduce visibility this year.',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-04-16', end: '2027-04-25', peak: '2027-04-23',
+  },
+  {
+    id: 'eta-aquariids-2027',
+    emoji: '☄️',
+    title: 'Eta Aquariid Meteor Shower',
+    message: 'The Eta Aquariids peak — fragments of Halley\'s Comet, up to 50/hour before dawn. New moon on 6 May means excellent dark skies this year.',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-04-19', end: '2027-05-28', peak: '2027-05-05',
+  },
+  {
+    id: 'perseids-2027',
+    emoji: '☄️',
+    title: 'Perseid Meteor Shower',
+    message: 'The Perseids are active — one of the best showers of the year, up to 100 meteors/hour at peak around 13 Aug.',
+    color: '#3a1a00', textColor: '#ffe8c0',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-07-17', end: '2027-08-24', peak: '2027-08-13',
+  },
+  {
+    id: 'orionids-2027',
+    emoji: '☄️',
+    title: 'Orionid Meteor Shower',
+    message: 'The Orionid shower peaks — fast, bright meteors from Halley\'s Comet debris. Up to 25/hour.',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-10-02', end: '2027-11-07', peak: '2027-10-21',
+  },
+  {
+    id: 'leonids-2027',
+    emoji: '☄️',
+    title: 'Leonid Meteor Shower',
+    message: 'The Leonid shower peaks — fast meteors from comet Tempel-Tuttle, up to 15/hour.',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-11-06', end: '2027-11-30', peak: '2027-11-17',
+  },
+  {
+    id: 'geminids-2027',
+    emoji: '☄️',
+    title: 'Geminid Meteor Shower',
+    message: 'The Geminids peak — the finest shower of the year, up to 150 meteors/hour, visible even before midnight.',
+    color: '#3a1a00', textColor: '#ffe8c0',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-12-04', end: '2027-12-20', peak: '2027-12-14',
+  },
+  {
+    id: 'ursids-2027',
+    emoji: '☄️',
+    title: 'Ursid Meteor Shower',
+    message: 'The Ursid shower peaks near the winter solstice — circumpolar, best from northern latitudes.',
+    color: '#2a1a5a', textColor: '#e8d8ff',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-12-17', end: '2027-12-26', peak: '2027-12-22',
+  },
+
+  // ── 2027 ECLIPSES ───────────────────────────────────────────────────
+  {
+    id: 'annular-solar-eclipse-2027-feb',
+    emoji: '🌑',
+    title: 'Annular Solar Eclipse',
+    message: 'An annular solar eclipse creates a "ring of fire" effect — visible across parts of South America, Africa and the Indian Ocean.',
+    color: '#1a0a2a', textColor: '#d8c8f8',
+    type: 'cosmic', nightOnly: false,
+    start: '2027-02-06', end: '2027-02-06', peak: '2027-02-06',
+  },
+  {
+    id: 'total-solar-eclipse-2027-aug',
+    emoji: '🌑',
+    title: 'Total Solar Eclipse',
+    message: 'A spectacular total solar eclipse — the path of totality crosses Morocco, Spain, Algeria, Libya, Egypt and Saudi Arabia. One of the longest totalities of the century.',
+    color: '#1a0a2a', textColor: '#d8c8f8',
+    type: 'cosmic', nightOnly: false,
+    start: '2027-08-02', end: '2027-08-02', peak: '2027-08-02',
+  },
+
+  // ── 2027 PLANETARY EVENTS ───────────────────────────────────────────
+  {
+    id: 'mars-opposition-2027',
+    emoji: '🔴',
+    title: 'Mars at Opposition',
+    message: 'Mars is at its closest and brightest — a vivid red beacon visible all night long. Good binoculars will reveal its surface colour.',
+    color: '#2a1520', textColor: '#ffc8d8',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-02-19', end: '2027-02-19', peak: '2027-02-19',
+  },
+  {
+    id: 'venus-jupiter-conjunction-2027',
+    emoji: '🪐',
+    title: 'Venus & Jupiter Conjunction',
+    message: 'Venus and Jupiter appear strikingly close together in the evening sky — a dazzling naked-eye pairing of the two brightest planets.',
+    color: '#1a2a3a', textColor: '#c8e8ff',
+    type: 'cosmic', nightOnly: true,
+    start: '2027-08-23', end: '2027-08-27', peak: '2027-08-25',
+  },
+];
diff --git a/assets/js/events/dynamic-message.js b/assets/js/events/dynamic-message.js
new file mode 100644
index 0000000..1ef5ad4
--- /dev/null
+++ b/assets/js/events/dynamic-message.js
@@ -0,0 +1,29 @@
+// ════════════════════════════════════════════════════════════════════════
+//  dynamic-message.js — Rewrites a cosmic event's message based on where
+//  today sits vs. the peak.
+//
+//    Before peak : "is active and building — peak on <date>. <detail>"
+//    On peak ±1d : "peaks tonight — <detail>"
+//    After peak  : "is past its peak (<date>) but still possibly visible — <detail>"
+//
+//  Single-day events (start === end) keep their static message unchanged.
+// ════════════════════════════════════════════════════════════════════════
+
+export function dynamicCosmicMessage(ev, dateStr) {
+  if (!ev.peak || ev.start === ev.end) return ev.message;
+  var today    = new Date(dateStr + 'T00:00Z');
+  var peak     = new Date(ev.peak  + 'T00:00Z');
+  var diffDays = Math.round((today - peak) / 86400000);
+  var peakFmt  = peak.toLocaleDateString('en-GB', { day: 'numeric', month: 'short', timeZone: 'UTC' });
+  var base = ev.message
+    .replace(/^.*?(?:peaks tonight|peak tonight|is active tonight|is active|peaks)\s*—\s*/i, '')
+    .trim();
+  var baseCapd = base.charAt(0).toUpperCase() + base.slice(1);
+  if (diffDays < -1) {
+    return ev.title + ' is active and building — peak on ' + peakFmt + '. ' + baseCapd;
+  } else if (diffDays <= 1) {
+    return ev.title + ' peaks tonight — ' + base;
+  } else {
+    return ev.title + ' is past its peak (' + peakFmt + ') but still possibly visible — ' + base;
+  }
+}
diff --git a/assets/js/events/lens-overlay.js b/assets/js/events/lens-overlay.js
new file mode 100644
index 0000000..8b6f9bc
--- /dev/null
+++ b/assets/js/events/lens-overlay.js
@@ -0,0 +1,100 @@
+// ════════════════════════════════════════════════════════════════════════
+//  lens-overlay.js — Returns an SVG string for the event overlay inside
+//  the big ScopeReticle.
+//
+//  Rendered INSIDE the lens clip path, BELOW the glass shine/shade layers.
+//  cx, cy = lens centre coords; lensR = lens radius.
+//
+//  To add a new overlay for an event: add another `if (...)` block below
+//  that matches by event.emoji or event.id and returns an SVG fragment
+//  string. Return null when no overlay applies.
+// ════════════════════════════════════════════════════════════════════════
+
+export function getLensOverlaySVG(event, cx, cy, lensR) {
+  if (!event) return null;
+  const id = event.id;
+
+  if (event.emoji === '☄️') {
+    return [
+      '<g opacity="0.55" clip-path="url(#scope-lens-clip)">',
+      '<line x1="' + (cx-60) + '" y1="' + (cy-50) + '" x2="' + (cx-20) + '" y2="' + (cy-20) + '" stroke="#ffe8a0" stroke-width="1.5" stroke-linecap="round" opacity="0.9"/>',
+      '<line x1="' + (cx-40) + '" y1="' + (cy-70) + '" x2="' + (cx+5) + '" y2="' + (cy-30) + '" stroke="#fff0c0" stroke-width="1" stroke-linecap="round" opacity="0.7"/>',
+      '<line x1="' + (cx+30) + '" y1="' + (cy-60) + '" x2="' + (cx+65) + '" y2="' + (cy-25) + '" stroke="#ffe8a0" stroke-width="1.8" stroke-linecap="round" opacity="0.8"/>',
+      '<line x1="' + (cx-10) + '" y1="' + (cy-40) + '" x2="' + (cx+30) + '" y2="' + (cy-5) + '" stroke="#fff0c0" stroke-width="0.9" stroke-linecap="round" opacity="0.65"/>',
+      '<line x1="' + (cx-70) + '" y1="' + (cy-20) + '" x2="' + (cx-35) + '" y2="' + (cy+10) + '" stroke="#ffe8a0" stroke-width="1.2" stroke-linecap="round" opacity="0.6"/>',
+      '</g>',
+    ].join('');
+  }
+
+  if (id.includes('solar-eclipse')) {
+    const cx_ = cx, cy_ = cy - 20;
+    return '<g clip-path="url(#scope-lens-clip)">'
+      + '<radialGradient id="corona-glow" cx="' + cx_ + '" cy="' + cy_ + '" r="38" gradientUnits="userSpaceOnUse">'
+      + '<stop offset="0%" stop-color="rgba(255,220,100,0)" />'
+      + '<stop offset="55%" stop-color="rgba(255,220,100,0.55)" />'
+      + '<stop offset="100%" stop-color="rgba(255,180,40,0)" /></radialGradient>'
+      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="38" fill="url(#corona-glow)" opacity="0.8" />'
+      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="18" fill="rgba(5,2,15,0.88)" /></g>';
+  }
+
+  if (id.includes('lunar-eclipse')) {
+    const cx_ = cx, cy_ = cy - 30;
+    return '<g clip-path="url(#scope-lens-clip)">'
+      + '<radialGradient id="blood-moon-glow" cx="' + cx_ + '" cy="' + cy_ + '" r="30" gradientUnits="userSpaceOnUse">'
+      + '<stop offset="0%" stop-color="rgba(180,30,10,0.7)" />'
+      + '<stop offset="100%" stop-color="rgba(120,10,5,0)" /></radialGradient>'
+      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="30" fill="url(#blood-moon-glow)" />'
+      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="16" fill="rgba(160,25,10,0.75)" />'
+      + '<circle cx="' + cx_ + '" cy="' + cy_ + '" r="16" fill="none" stroke="rgba(220,60,20,0.5)" stroke-width="1.5" /></g>';
+  }
+
+  if (event.emoji === '🪐' && event.id.includes('conjunction')) {
+    return '<g clip-path="url(#scope-lens-clip)" opacity="0.65">'
+      + '<circle cx="' + (cx+20) + '" cy="' + (cy-35) + '" r="10" fill="rgba(210,185,130,0.7)" />'
+      + '<ellipse cx="' + (cx+20) + '" cy="' + (cy-35) + '" rx="18" ry="4.5" fill="none" stroke="rgba(200,170,100,0.65)" stroke-width="2.5" /></g>';
+  }
+
+  if (event.emoji === '🔴') {
+    return '<g clip-path="url(#scope-lens-clip)" opacity="0.6">'
+      + '<circle cx="' + (cx+30) + '" cy="' + (cy-30) + '" r="7" fill="rgba(200,80,40,0.75)" />'
+      + '<circle cx="' + (cx-20) + '" cy="' + (cy-45) + '" r="5" fill="rgba(220,160,80,0.7)" /></g>';
+  }
+
+  if (id === 'stargazing') {
+    const pts = [[cx-50,cy-55,1.8],[cx+40,cy-65,1.4],[cx-20,cy-70,1.0],[cx+65,cy-40,1.6],[cx-60,cy-30,1.2],[cx+50,cy-55,1.0],[cx-35,cy-45,1.4],[cx+20,cy-50,1.8],[cx-75,cy-50,1.0]];
+    const dots = pts.map(function(s){return '<circle cx="'+s[0]+'" cy="'+s[1]+'" r="'+s[2]+'" fill="rgba(255,255,255,0.9)" />';}).join('');
+    return '<g clip-path="url(#scope-lens-clip)" opacity="0.7">' + dots + '</g>';
+  }
+
+  if (id === 'perfect-sunset') {
+    return '<g clip-path="url(#scope-lens-clip)" opacity="0.5">'
+      + '<radialGradient id="sunset-lens-glow" cx="' + cx + '" cy="' + (cy+20) + '" r="' + lensR + '" gradientUnits="userSpaceOnUse">'
+      + '<stop offset="0%" stop-color="rgba(255,120,20,0.7)" />'
+      + '<stop offset="50%" stop-color="rgba(255,60,10,0.25)" />'
+      + '<stop offset="100%" stop-color="rgba(200,20,0,0)" /></radialGradient>'
+      + '<circle cx="' + cx + '" cy="' + cy + '" r="' + lensR + '" fill="url(#sunset-lens-glow)" /></g>';
+  }
+
+  if (id === 'heat-spike') {
+    return '<g clip-path="url(#scope-lens-clip)" opacity="0.35">'
+      + '<path d="M ' + (cx-lensR+10) + ' ' + (cy+30) + ' Q ' + (cx-20) + ' ' + (cy+15) + ' ' + (cx+20) + ' ' + (cy+30) + ' Q ' + (cx+60) + ' ' + (cy+45) + ' ' + (cx+lensR-10) + ' ' + (cy+30) + '" fill="none" stroke="rgba(255,120,20,0.6)" stroke-width="2" />'
+      + '<path d="M ' + (cx-lensR+10) + ' ' + (cy+45) + ' Q ' + (cx-10) + ' ' + (cy+30) + ' ' + (cx+30) + ' ' + (cy+45) + ' Q ' + (cx+65) + ' ' + (cy+60) + ' ' + (cx+lensR-10) + ' ' + (cy+45) + '" fill="none" stroke="rgba(255,100,10,0.5)" stroke-width="2" /></g>';
+  }
+
+  if (id === 'storm') {
+    const sl = [-55,-30,-5,20,45,65].map(function(x){
+      return '<line x1="' + (cx+x) + '" y1="' + (cy-lensR+10) + '" x2="' + (cx+x-15) + '" y2="' + (cy+lensR-10) + '" stroke="rgba(140,180,220,0.6)" stroke-width="1" stroke-linecap="round" />';
+    }).join('');
+    return '<g clip-path="url(#scope-lens-clip)" opacity="0.45">' + sl + '</g>';
+  }
+
+  if (id === 'frost') {
+    const fc = [[-50,40],[0,55],[50,40],[-30,65],[30,65]].map(function(p){
+      var dx=p[0], dy=p[1];
+      return '<g transform="translate(' + (cx+dx) + ',' + (cy+dy) + ')"><line x1="-6" y1="0" x2="6" y2="0" stroke="rgba(180,220,255,0.8)" stroke-width="1" /><line x1="0" y1="-6" x2="0" y2="6" stroke="rgba(180,220,255,0.8)" stroke-width="1" /><line x1="-4" y1="-4" x2="4" y2="4" stroke="rgba(180,220,255,0.7)" stroke-width="0.8" /><line x1="4" y1="-4" x2="-4" y2="4" stroke="rgba(180,220,255,0.7)" stroke-width="0.8" /></g>';
+    }).join('');
+    return '<g clip-path="url(#scope-lens-clip)" opacity="0.5">' + fc + '</g>';
+  }
+
+  return null;
+}
diff --git a/assets/js/events/weather-checks.js b/assets/js/events/weather-checks.js
new file mode 100644
index 0000000..36f31ac
--- /dev/null
+++ b/assets/js/events/weather-checks.js
@@ -0,0 +1,139 @@
+// ════════════════════════════════════════════════════════════════════════
+//  weather-checks.js — Weather-derived event detectors.
+//
+//  Computed in real-time from the forecast data.
+//  Each checker function receives (rows [, location]) and returns an event
+//  object or null. rows = today's hourlyRows array.
+//  location = { lat, lon, name, country }.
+//
+//  To add a new weather event: write a checkXxx(rows, location) function
+//  below, export it, and add it to the checks[] array inside
+//  getActiveEvents() (in events.js).
+// ════════════════════════════════════════════════════════════════════════
+
+export function checkStargazing(rows) {
+  // Great stargazing: mostly clear night hours with low cloud
+  const nightRows = rows.filter(r => r.elev < -5);
+  if (nightRows.length < 3) return null;
+  const avgCloud = nightRows.reduce((s, r) => s + r.cc, 0) / nightRows.length;
+  if (avgCloud > 30) return null;
+  return {
+    id: 'stargazing',
+    emoji: '⭐',
+    title: 'Great Stargazing Tonight',
+    message: `Clear skies expected overnight at ${nightRows.length} hours with average ${Math.round(avgCloud)}% cloud — ideal conditions for stargazing.`,
+    color: '#080e1a',
+    textColor: '#c8dcff',
+    type: 'weather',
+    nightOnly: true,
+  };
+}
+
+export function checkSunset(rows, location) {
+  // Find the actual sunset window: the LAST contiguous run of rows where
+  // solar elevation is in the golden/civil-twilight band (-3° to 8°).
+  // This distinguishes sunset from sunrise (which is the first such run).
+  const twilightIndices = rows
+    .map((r, i) => ({ r, i }))
+    .filter(({ r }) => r.elev > -3 && r.elev < 8);
+  if (twilightIndices.length === 0) return null;
+
+  // Split into runs separated by gaps (midday gap separates sunrise from sunset)
+  const runs = [];
+  let run = [twilightIndices[0]];
+  for (let k = 1; k < twilightIndices.length; k++) {
+    if (twilightIndices[k].i === twilightIndices[k - 1].i + 1) {
+      run.push(twilightIndices[k]);
+    } else {
+      runs.push(run);
+      run = [twilightIndices[k]];
+    }
+  }
+  runs.push(run);
+
+  // Use the LAST run (sunset). If only one run exists it's either sunrise-only
+  // or a single dusk window — use it but we'll label generically.
+  const sunsetRun = runs[runs.length - 1];
+  const sunsetRows = sunsetRun.map(({ r }) => r);
+  const isSunrise = runs.length === 1 && sunsetRows[0].elev < sunsetRows[sunsetRows.length - 1].elev;
+  // If sun is rising through the band this is a sunrise window, not sunset — skip.
+  if (isSunrise) return null;
+
+  const avgCloud = sunsetRows.reduce((s, r) => s + r.cc, 0) / sunsetRows.length;
+  const avgLowCloud = sunsetRows.reduce((s, r) => s + (r.ccLow || 0), 0) / sunsetRows.length;
+  if (avgLowCloud > 25) return null;
+  if (avgCloud < 5 || avgCloud > 75) return null;
+
+  // Store the ISO time range so getCellTagEvents can limit the icon to those hours
+  const firstISO = sunsetRun[0].r.iso;
+  const lastISO  = sunsetRun[sunsetRun.length - 1].r.iso;
+
+  return {
+    id: 'perfect-sunset',
+    emoji: '🌅',
+    title: 'Spectacular Sunset Conditions',
+    message: `Low cloud is clear near the horizon but high cloud will scatter the light — conditions look ideal for a vivid sunset near ${location.name}.`,
+    color: '#3a1a00',
+    textColor: '#ffe0b0',
+    type: 'weather',
+    nightOnly: false,
+    isoRange: [firstISO, lastISO],  // only show cell icon during these hours
+  };
+}
+
+export function checkHeatSpike(rows) {
+  const maxTemp = Math.max(...rows.map(r => r.Ta).filter(isFinite));
+  if (maxTemp < 30) return null;
+  const severity = maxTemp >= 36 ? 'extreme' : maxTemp >= 33 ? 'severe' : 'notable';
+  const msgs = {
+    notable: `Temperatures reaching ${maxTemp.toFixed(1)}°C — above seasonal norms. Stay hydrated and avoid prolonged sun exposure.`,
+    severe:  `Heat warning: ${maxTemp.toFixed(1)}°C expected today. Risk of heat exhaustion for vulnerable people — keep cool and hydrated.`,
+    extreme: `Extreme heat alert: ${maxTemp.toFixed(1)}°C forecast. Risk of heat stroke — avoid outdoor activity during peak hours.`,
+  };
+  return {
+    id: 'heat-spike',
+    emoji: '🔥',
+    title: severity === 'extreme' ? 'Extreme Heat Alert' : severity === 'severe' ? 'Heat Warning' : 'Heat Spike Today',
+    message: msgs[severity],
+    color: severity === 'extreme' ? '#3a0000' : severity === 'severe' ? '#4a1000' : '#5a2000',
+    textColor: '#ffd0b0',
+    type: 'weather',
+    nightOnly: false,
+  };
+}
+
+export function checkStorm(rows) {
+  const maxGust = Math.max(...rows.map(r => r.gust ?? r.va ?? 0).filter(isFinite));
+  const maxPrecip = Math.max(...rows.map(r => r.precip ?? 0).filter(isFinite));
+  if (maxGust < 15 && maxPrecip < 5) return null;
+  const isStorm = maxGust >= 20 || maxPrecip >= 10;
+  return {
+    id: 'storm',
+    emoji: '🌩️',
+    title: isStorm ? 'Storm Conditions Forecast' : 'Blustery & Wet Today',
+    message: isStorm
+      ? `Storm-level conditions expected — gusts to ${maxGust.toFixed(0)} m/s with heavy precipitation. Take care outdoors.`
+      : `Unsettled day ahead — windy with gusts to ${maxGust.toFixed(0)} m/s and ${maxPrecip.toFixed(1)} mm/h rain at peak.`,
+    color: '#1a2030',
+    textColor: '#c0d8f0',
+    type: 'weather',
+    nightOnly: false,
+  };
+}
+
+export function checkFrost(rows) {
+  const minTemp = Math.min(...rows.map(r => r.Ta).filter(isFinite));
+  if (minTemp > 2) return null;
+  return {
+    id: 'frost',
+    emoji: '❄️',
+    title: minTemp <= 0 ? 'Freezing Conditions' : 'Frost Risk Tonight',
+    message: minTemp <= 0
+      ? `Temperatures dropping to ${minTemp.toFixed(1)}°C — ice on roads and surfaces is likely. Allow extra travel time.`
+      : `Temperatures near freezing tonight (${minTemp.toFixed(1)}°C) — frost possible on exposed surfaces and vehicles.`,
+    color: '#0a1a2a',
+    textColor: '#c8e8ff',
+    type: 'weather',
+    nightOnly: false,
+  };
+}
diff --git a/assets/js/hooks/useColumnPopup.js b/assets/js/hooks/useColumnPopup.js
new file mode 100644
index 0000000..6a9d1cd
--- /dev/null
+++ b/assets/js/hooks/useColumnPopup.js
@@ -0,0 +1,221 @@
+// ════════════════════════════════════════════════════════════════════════
+//  useColumnPopup — owns the column-header popup AND the event-tag popup.
+//
+//  Both popups behave identically:
+//    • click an anchor → toggle the popup open
+//    • hover an anchor for N ms → open
+//    • move into the popup → keep it open
+//    • leave the popup → close after 200 ms
+//    • click outside / scroll / resize → close immediately
+//
+//  Returns everything app.js needs to wire up the th cells and event-tag
+//  spans, plus the popup state objects for rendering the floating panels.
+// ════════════════════════════════════════════════════════════════════════
+
+import { useState, useEffect, useRef, useCallback } from '../../vendor/preact-hooks.js';
+
+export function useColumnPopup() {
+  // ─── Column header popup ────────────────────────────────────────────
+  const [colPopup, setColPopup] = useState(null);
+  const colPopupRef   = useRef(null);
+  const colPopupThRef = useRef(null);
+  const hoverTimerRef = useRef(null);
+  const closeTimerRef = useRef(null);
+
+  // ─── Event tag popup ────────────────────────────────────────────────
+  // Holds { events[], slideIndex, x, y, arrowLeft, below }
+  // When multiple events are in the popup they auto-cycle with a crossfade.
+  const [eventTagPopup, setEventTagPopup] = useState(null);
+  const [evSlideIndex, setEvSlideIndex]   = useState(0);
+  // 'entering' | 'exiting' | null — drives CSS crossfade classes
+  const [evTransition, setEvTransition]   = useState(null);
+  const prevSlideIndexRef = useRef(0);
+  const eventTagPopupRef  = useRef(null);
+  const evHoverTimerRef   = useRef(null);
+  const evCloseTimerRef   = useRef(null);
+  const evSlideTimerRef   = useRef(null);
+
+  const calcPopupPos = (thEl) => {
+    const rect = thEl.getBoundingClientRect();
+    const popupW = 260, popupH = 110, margin = 8, gap = 6;
+    let x = rect.left + rect.width / 2;
+    x = Math.max(popupW / 2 + margin, Math.min(x, window.innerWidth - popupW / 2 - margin));
+    const below = rect.top < popupH + gap + margin;
+    const y = below ? rect.bottom + gap : rect.top - gap;
+    const popupLeft = x - popupW / 2;
+    const arrowLeft = Math.max(16, Math.min(rect.left + rect.width / 2 - popupLeft, popupW - 16));
+    return { x, y, arrowLeft, below };
+  };
+
+  const openPopup = (key, thEl) => {
+    colPopupThRef.current = thEl;
+    setColPopup({ key, ...calcPopupPos(thEl) });
+  };
+
+  const closePopup = () => {
+    setColPopup(null);
+    colPopupThRef.current = null;
+    clearTimeout(hoverTimerRef.current);
+    clearTimeout(closeTimerRef.current);
+  };
+
+  const handleThClick = (key, e) => {
+    clearTimeout(hoverTimerRef.current);
+    clearTimeout(closeTimerRef.current);
+    if (colPopup?.key === key) { closePopup(); return; }
+    openPopup(key, e.currentTarget);
+  };
+
+  const handleThEnter = (key, e) => {
+    clearTimeout(hoverTimerRef.current);
+    clearTimeout(closeTimerRef.current);
+    // If a different popup is open, close it immediately and start fresh timer
+    if (colPopup && colPopup.key !== key) closePopup();
+    if (colPopup?.key === key) return; // already showing this one
+    const thEl = e.currentTarget;
+    hoverTimerRef.current = setTimeout(() => openPopup(key, thEl), 1000);
+  };
+
+  // Leaving a th: just cancel the pending open. Don't auto-close —
+  // the user might be moving into the popup, or just passing through.
+  const handleThLeave = () => {
+    clearTimeout(hoverTimerRef.current);
+  };
+
+  // Popup mouse handlers: keep it open while hovering, close on leave.
+  const handlePopupEnter = () => clearTimeout(closeTimerRef.current);
+  const handlePopupLeave = () => { closeTimerRef.current = setTimeout(closePopup, 200); };
+
+  useEffect(() => {
+    if (!colPopup) return;
+    const onClickOutside = (e) => {
+      if (colPopupRef.current && !colPopupRef.current.contains(e.target)) closePopup();
+    };
+    // Close on scroll (avoids scroll-linked jank) or resize
+    const onScrollOrResize = () => closePopup();
+    document.addEventListener('mousedown', onClickOutside);
+    window.addEventListener('scroll', onScrollOrResize, { passive: true, capture: true });
+    window.addEventListener('resize', onScrollOrResize, { passive: true });
+    return () => {
+      document.removeEventListener('mousedown', onClickOutside);
+      window.removeEventListener('scroll', onScrollOrResize, { capture: true });
+      window.removeEventListener('resize', onScrollOrResize);
+    };
+  }, [colPopup]);
+
+  // ─── Event tag popup helpers ─────────────────────────────────────────
+  const calcEventPopupPos = (spanEl) => {
+    const rect = spanEl.getBoundingClientRect();
+    const popupW = 260, popupH = 80, margin = 8, gap = 6;
+    let x = rect.left + rect.width / 2;
+    x = Math.max(popupW / 2 + margin, Math.min(x, window.innerWidth - popupW / 2 - margin));
+    const below = rect.top < popupH + gap + margin;
+    const y = below ? rect.bottom + gap : rect.top - gap;
+    const popupLeft = x - popupW / 2;
+    const arrowLeft = Math.max(16, Math.min(rect.left + rect.width / 2 - popupLeft, popupW - 16));
+    return { x, y, arrowLeft, below };
+  };
+
+  // ─── Slideshow advance ───────────────────────────────────────────────
+  // evSlideTo triggers a crossfade to a new slide index.
+  const evSlideTo = useCallback((nextIndex) => {
+    setEvTransition('exiting');
+    // After the exit animation (~400 ms) swap content and fade in
+    setTimeout(() => {
+      prevSlideIndexRef.current = nextIndex;
+      setEvSlideIndex(nextIndex);
+      setEvTransition('entering');
+      // Clear the entering class once the animation finishes
+      setTimeout(() => setEvTransition(null), 420);
+    }, 400);
+  }, []);
+
+  // Auto-advance slideshow when popup is open with multiple events.
+  // We store a ref to evSlideIndex so the interval closure always reads
+  // the latest value without needing to be recreated on every slide change.
+  const evSlideIndexRef = useRef(0);
+  useEffect(() => { evSlideIndexRef.current = evSlideIndex; }, [evSlideIndex]);
+
+  useEffect(() => {
+    if (!eventTagPopup || eventTagPopup.events.length <= 1) {
+      clearInterval(evSlideTimerRef.current);
+      return;
+    }
+    evSlideTimerRef.current = setInterval(() => {
+      const next = (evSlideIndexRef.current + 1) % eventTagPopup.events.length;
+      evSlideTo(next);
+    }, 4000);
+    return () => clearInterval(evSlideTimerRef.current);
+  }, [eventTagPopup, evSlideTo]);
+
+  // ─── Event tag popup handlers ────────────────────────────────────────
+  const openEventTagPopup = (events, spanEl) => {
+    clearInterval(evSlideTimerRef.current);
+    setEvSlideIndex(0);
+    setEvTransition(null);
+    setEventTagPopup({ events, ...calcEventPopupPos(spanEl) });
+  };
+
+  const closeEventTagPopup = () => {
+    setEventTagPopup(null);
+    setEvSlideIndex(0);
+    setEvTransition(null);
+    clearTimeout(evHoverTimerRef.current);
+    clearTimeout(evCloseTimerRef.current);
+    clearInterval(evSlideTimerRef.current);
+  };
+
+  // rowEvents = all events for that row (passed in from app.js)
+  const handleEventTagClick = (rowEvents, e) => {
+    e.stopPropagation();
+    clearTimeout(evHoverTimerRef.current);
+    clearTimeout(evCloseTimerRef.current);
+    // Toggle off if same set already open
+    if (eventTagPopup && JSON.stringify(eventTagPopup.events.map(ev => ev.id)) === JSON.stringify(rowEvents.map(ev => ev.id))) {
+      closeEventTagPopup(); return;
+    }
+    openEventTagPopup(rowEvents, e.currentTarget);
+  };
+
+  const handleEventTagEnter = (rowEvents, e) => {
+    clearTimeout(evHoverTimerRef.current);
+    clearTimeout(evCloseTimerRef.current);
+    const spanEl = e.currentTarget;
+    evHoverTimerRef.current = setTimeout(() => openEventTagPopup(rowEvents, spanEl), 700);
+  };
+
+  const handleEventTagLeave = () => clearTimeout(evHoverTimerRef.current);
+
+  const handleEventTagPopupEnter = () => clearTimeout(evCloseTimerRef.current);
+  const handleEventTagPopupLeave = () => { evCloseTimerRef.current = setTimeout(closeEventTagPopup, 200); };
+
+  useEffect(() => {
+    if (!eventTagPopup) return;
+    const onClickOutside = (e) => {
+      if (eventTagPopupRef.current && !eventTagPopupRef.current.contains(e.target)) closeEventTagPopup();
+    };
+    const onScrollOrResize = () => closeEventTagPopup();
+    document.addEventListener('mousedown', onClickOutside);
+    window.addEventListener('scroll', onScrollOrResize, { passive: true, capture: true });
+    window.addEventListener('resize', onScrollOrResize, { passive: true });
+    return () => {
+      document.removeEventListener('mousedown', onClickOutside);
+      window.removeEventListener('scroll', onScrollOrResize, { capture: true });
+      window.removeEventListener('resize', onScrollOrResize);
+    };
+  }, [eventTagPopup]);
+
+  return {
+    // column-header popup
+    colPopup, colPopupRef,
+    handleThClick, handleThEnter, handleThLeave,
+    handlePopupEnter, handlePopupLeave,
+    closePopup,
+    // event-tag popup
+    eventTagPopup, eventTagPopupRef,
+    evSlideIndex, evTransition, evSlideTo,
+    handleEventTagClick, handleEventTagEnter, handleEventTagLeave,
+    handleEventTagPopupEnter, handleEventTagPopupLeave,
+    closeEventTagPopup,
+  };
+}
diff --git a/assets/js/hooks/useForecast.js b/assets/js/hooks/useForecast.js
new file mode 100644
index 0000000..77a333c
--- /dev/null
+++ b/assets/js/hooks/useForecast.js
@@ -0,0 +1,124 @@
+// ════════════════════════════════════════════════════════════════════════
+//  useForecast — fetches the weather forecast and air quality for the
+//  given location and keeps them fresh.
+//
+//  Responsibilities:
+//    1. Fetch /v1/forecast on location change.
+//    2. Fetch /v1/air-quality on location change, with a 6-hour
+//       localStorage cache (AQI / pollen update slowly).
+//    3. Auto-refresh both every 5 minutes so the displayed data stays
+//       current as time passes. Air quality only refetches if cache is
+//       stale.
+//
+//  Inputs:
+//    location  — { lat, lon, name, country }
+//
+//  Outputs:
+//    forecast    — raw /v1/forecast response, or null
+//    airQuality  — raw /v1/air-quality response, or null
+//    loading     — true while the forecast fetch is in flight
+//    error       — fetch error message, or null
+//    now         — Date that ticks every 5 minutes (drives the "current row")
+// ════════════════════════════════════════════════════════════════════════
+
+import { useState, useEffect } from '../../vendor/preact-hooks.js';
+
+const SIX_HOURS_MS = 6 * 60 * 60 * 1000;
+const FIVE_MIN     = 5 * 60 * 1000;
+
+function buildForecastUrl(loc) {
+  return `https://api.open-meteo.com/v1/forecast` +
+    `?latitude=${loc.lat}&longitude=${loc.lon}` +
+    `&hourly=temperature_2m,relative_humidity_2m,dew_point_2m,` +
+    `wind_speed_10m,wind_direction_10m,wind_gusts_10m,` +
+    `direct_radiation,diffuse_radiation,shortwave_radiation,` +
+    `cloud_cover,cloud_cover_low,cloud_cover_mid,cloud_cover_high,` +
+    `uv_index,precipitation,snowfall,visibility,` +
+    `soil_temperature_0cm,soil_temperature_6cm,soil_moisture_0_to_1cm` +
+    `&wind_speed_unit=ms&timezone=auto&forecast_days=14`;
+}
+
+function buildAirQualityUrl(loc) {
+  return `https://air-quality-api.open-meteo.com/v1/air-quality` +
+    `?latitude=${loc.lat}&longitude=${loc.lon}` +
+    `&hourly=european_aqi,` +
+    `grass_pollen,birch_pollen,alder_pollen,` +
+    `mugwort_pollen,olive_pollen,ragweed_pollen` +
+    `&timezone=auto&forecast_days=5`;
+}
+
+export function useForecast(location) {
+  const [forecast, setForecast]     = useState(null);
+  const [airQuality, setAirQuality] = useState(null);
+  const [loading, setLoading]       = useState(false);
+  const [error, setError]           = useState(null);
+  const [now, setNow]               = useState(new Date());
+
+  // Air quality loader — also used by the 5-minute refresh below.
+  async function loadAirQuality(loc) {
+    const cacheKey = `sunscope_aq_${loc.lat.toFixed(4)}_${loc.lon.toFixed(4)}`;
+    try {
+      const cached = localStorage.getItem(cacheKey);
+      if (cached) {
+        const { ts, data } = JSON.parse(cached);
+        if (Date.now() - ts < SIX_HOURS_MS) {
+          setAirQuality(data);
+          return;
+        }
+      }
+    } catch (e) { /* ignore bad cache */ }
+    try {
+      const r = await fetch(buildAirQualityUrl(loc));
+      if (!r.ok) return; // silently fail — these columns just show '—'
+      const data = await r.json();
+      setAirQuality(data);
+      try {
+        localStorage.setItem(cacheKey, JSON.stringify({ ts: Date.now(), data }));
+      } catch (e) { /* ignore storage errors */ }
+    } catch (_) { /* silently ignore */ }
+  }
+
+  // ─── INITIAL FETCH on location change ─────────────────────────────
+  useEffect(() => {
+    async function load() {
+      setLoading(true); setError(null);
+      try {
+        const r = await fetch(buildForecastUrl(location));
+        if (!r.ok) throw new Error(`Open-Meteo HTTP ${r.status}`);
+        setForecast(await r.json());
+      } catch (e) { setError(e.message); }
+      finally { setLoading(false); }
+    }
+    load();
+    loadAirQuality(location);
+  }, [location]);
+
+  // ─── AUTO-REFRESH every 5 minutes ─────────────────────────────────
+  // Updates `now` (drives the "current hour" highlight) and refetches
+  // the forecast so fresh API data comes in automatically. Air quality
+  // only refetches if its 6-hour cache has expired.
+  useEffect(() => {
+    const id = setInterval(() => {
+      setNow(new Date());
+      async function refresh() {
+        try {
+          const r = await fetch(buildForecastUrl(location));
+          if (r.ok) setForecast(await r.json());
+        } catch (_) { /* silently ignore refresh errors */ }
+        const cacheKey = `sunscope_aq_${location.lat.toFixed(4)}_${location.lon.toFixed(4)}`;
+        try {
+          const cached = localStorage.getItem(cacheKey);
+          if (cached) {
+            const { ts } = JSON.parse(cached);
+            if (Date.now() - ts < SIX_HOURS_MS) return; // still fresh
+          }
+        } catch (e) { /* ignore */ }
+        loadAirQuality(location);
+      }
+      refresh();
+    }, FIVE_MIN);
+    return () => clearInterval(id);
+  }, [location]);
+
+  return { forecast, airQuality, loading, error, now };
+}
diff --git a/assets/js/hooks/useTableScroll.js b/assets/js/hooks/useTableScroll.js
new file mode 100644
index 0000000..b99cf59
--- /dev/null
+++ b/assets/js/hooks/useTableScroll.js
@@ -0,0 +1,222 @@
+// ════════════════════════════════════════════════════════════════════════
+//  useTableScroll — owns the horizontal scroll behaviour of the hourly
+//  table (sticky header + body scroller layout).
+//
+//  Responsibilities:
+//    1. SCROLL INDICATORS — track whether the body can scroll left/right so
+//       the table edges can show fade + chevron indicators.
+//    2. DRAG-TO-SCROLL — pointer-event drag on the body scroller for
+//       desktop users.
+//    3. SCROLL SYNC — keep the sticky header track shifted horizontally to
+//       match the body's scrollLeft, and keep header cell widths in lock-
+//       step with body cell widths even as columns toggle / window resizes.
+//
+//  Inputs (passed by app.js):
+//    refs: { headTableRef, bodyTableRef, bodyScrollRef, headTrackRef }
+//    deps: { forecast, visibleCols, selectedDay, skinType, vehicleType }
+//      — anything that should cause a re-sync when it changes.
+//
+//  Outputs:
+//    tableCanScrollLeft, tableCanScrollRight  → drive the fade/chevron CSS
+//    handleBodyScroll                          → attach to body onScroll
+// ════════════════════════════════════════════════════════════════════════
+
+import { useState, useEffect, useLayoutEffect } from '../../vendor/preact-hooks.js';
+
+export function useTableScroll({
+  headTableRef,
+  bodyTableRef,
+  bodyScrollRef,
+  headTrackRef,
+  forecast,
+  visibleCols,
+  selectedDay,
+  skinType,
+  vehicleType,
+}) {
+  // ─── SCROLL INDICATORS ─────────────────────────────────────────────
+  const [tableCanScrollLeft,  setTableCanScrollLeft]  = useState(false);
+  const [tableCanScrollRight, setTableCanScrollRight] = useState(false);
+
+  const updateTableScrollIndicators = () => {
+    const el = bodyScrollRef.current;
+    if (!el) return;
+    setTableCanScrollLeft(el.scrollLeft > 1);
+    setTableCanScrollRight(el.scrollLeft + el.clientWidth < el.scrollWidth - 1);
+  };
+
+  // ─── DRAG-TO-SCROLL ────────────────────────────────────────────────
+  useEffect(() => {
+    const el = bodyScrollRef.current;
+    if (!el) return;
+    let isDown = false;
+    let startX = 0;
+    let startScroll = 0;
+
+    const onMouseDown = (e) => {
+      // Only act on clicks that land inside the body scroller
+      if (!el.contains(e.target)) return;
+      if (e.button !== 0) return;
+      if (e.target.closest('button, a, input, select')) return;
+      isDown = true;
+      startX = e.clientX;
+      startScroll = el.scrollLeft;
+      el.style.cursor = 'grabbing';
+      document.body.style.userSelect = 'none';
+      document.body.style.webkitUserSelect = 'none';
+    };
+    const onMouseMove = (e) => {
+      if (!isDown) return;
+      const dx = e.clientX - startX;
+      el.scrollLeft = startScroll - dx;
+    };
+    const onMouseUp = () => {
+      if (!isDown) return;
+      isDown = false;
+      el.style.cursor = '';
+      document.body.style.userSelect = '';
+      document.body.style.webkitUserSelect = '';
+    };
+
+    // Attach everything to document so Preact's synthetic event system
+    // cannot intercept or swallow the events before we see them.
+    document.addEventListener('mousedown', onMouseDown);
+    document.addEventListener('mousemove', onMouseMove);
+    document.addEventListener('mouseup',   onMouseUp);
+
+    // Also update indicators on scroll
+    el.addEventListener('scroll', updateTableScrollIndicators);
+
+    return () => {
+      document.removeEventListener('mousedown', onMouseDown);
+      document.removeEventListener('mousemove', onMouseMove);
+      document.removeEventListener('mouseup',   onMouseUp);
+      el.removeEventListener('scroll', updateTableScrollIndicators);
+    };
+  }, [forecast]);
+
+  // Update indicators after layout sync (columns may have changed width)
+  useEffect(() => {
+    updateTableScrollIndicators();
+  }, [forecast, visibleCols, selectedDay]);
+
+  // ─── BODY SCROLL HANDLER (called from JSX onScroll) ───────────────
+  const handleBodyScroll = () => {
+    const track = headTrackRef.current;
+    const body  = bodyScrollRef.current;
+    if (!track || !body) return;
+    track.style.transform = `translate3d(${-body.scrollLeft}px, 0, 0)`;
+    updateTableScrollIndicators();
+  };
+
+  // ─── COLUMN-WIDTH SCROLL SYNC (layout effect) ─────────────────────
+  // Synchronise the head and body table column widths with a
+  // "shrink-to-fit then distribute" strategy. See the comments inside
+  // sync() for the algorithm.
+  useLayoutEffect(() => {
+    const sync = () => {
+      const headTable  = headTableRef.current;
+      const bodyTable  = bodyTableRef.current;
+      const bodyScroll = bodyScrollRef.current;
+      if (!headTable || !bodyTable || !bodyScroll) return;
+      const bodyRow = bodyTable.querySelector('tbody tr');
+      const headRow = headTable.querySelector('thead tr');
+      if (!bodyRow || !headRow) return;
+      const headCells = Array.from(headRow.children);
+      const bodyCells = Array.from(bodyRow.children);
+      const n = Math.min(headCells.length, bodyCells.length);
+      if (n === 0) return;
+
+      // Step 1: clear any previously-forced cell widths and switch the
+      // tables to natural sizing so the measurement reflects the true
+      // content-fit width — independent of how wide the container is.
+      headCells.forEach(c => { c.style.width = ''; c.style.minWidth = ''; c.style.maxWidth = ''; });
+      bodyCells.forEach(c => { c.style.width = ''; c.style.minWidth = ''; c.style.maxWidth = ''; });
+      headTable.style.width = 'max-content';
+      bodyTable.style.width = 'max-content';
+      headTable.style.tableLayout = 'auto';
+      bodyTable.style.tableLayout = 'auto';
+
+      // Step 2: read each cell's natural width. getBoundingClientRect
+      // forces synchronous layout — that's what we want.
+      const naturalW = new Array(n);
+      let naturalTotal = 0;
+      for (let i = 0; i < n; i++) {
+        const headW = headCells[i].getBoundingClientRect().width;
+        const bodyW = bodyCells[i].getBoundingClientRect().width;
+        const w = Math.max(Math.ceil(headW), Math.ceil(bodyW));
+        naturalW[i] = w;
+        naturalTotal += w;
+      }
+
+      // Step 3: decide final widths based on available container width.
+      const containerW = bodyScroll.clientWidth;
+      const finalW = new Array(n);
+      let totalWidth;
+      if (naturalTotal > 0 && naturalTotal < containerW) {
+        // Spare space — distribute proportionally across columns so they
+        // fan out to fill the scroller (no awkward right-hand gap).
+        const scale = containerW / naturalTotal;
+        let running = 0;
+        for (let i = 0; i < n - 1; i++) {
+          finalW[i] = Math.floor(naturalW[i] * scale);
+          running += finalW[i];
+        }
+        // Absorb sub-pixel rounding into the last column so the total
+        // exactly matches the container width.
+        finalW[n - 1] = containerW - running;
+        totalWidth = containerW;
+      } else {
+        // Naturals don't fit — use them as-is and let the body scroll.
+        for (let i = 0; i < n; i++) finalW[i] = naturalW[i];
+        totalWidth = naturalTotal;
+      }
+
+      // Step 4: restore the CSS-defined table-layout: fixed so the
+      // explicit cell widths we apply below are honoured by the browser
+      // (not redistributed by the auto-layout algorithm).
+      headTable.style.tableLayout = '';
+      bodyTable.style.tableLayout = '';
+
+      // Step 5: apply the final width to both head and body cells.
+      for (let i = 0; i < n; i++) {
+        const px = `${finalW[i]}px`;
+        headCells[i].style.width    = px;
+        headCells[i].style.minWidth = px;
+        headCells[i].style.maxWidth = px;
+        bodyCells[i].style.width    = px;
+        bodyCells[i].style.minWidth = px;
+        bodyCells[i].style.maxWidth = px;
+      }
+      // Make both tables exactly totalWidth wide so they share the same
+      // horizontal extent — column N in the header sits directly above
+      // column N in the body, no drift as you scroll right.
+      headTable.style.width = `${totalWidth}px`;
+      bodyTable.style.width = `${totalWidth}px`;
+      // Re-apply current horizontal offset so column alignment survives.
+      handleBodyScroll();
+    };
+    // Run once after layout
+    sync();
+    // Re-sync when the scroll container's width changes (window resize,
+    // sidebar opens, etc). We observe the scroller — not the body table —
+    // because the body table's width is now driven by sync itself, which
+    // would otherwise create a feedback loop.
+    let ro = null;
+    if (typeof ResizeObserver !== 'undefined' && bodyScrollRef.current) {
+      ro = new ResizeObserver(sync);
+      ro.observe(bodyScrollRef.current);
+    }
+    window.addEventListener('resize', sync);
+    return () => {
+      if (ro) ro.disconnect();
+      window.removeEventListener('resize', sync);
+    };
+  }, [forecast, visibleCols, selectedDay, skinType, vehicleType]);
+
+  return {
+    tableCanScrollLeft,
+    tableCanScrollRight,
+    handleBodyScroll,
+  };
+}