diff --git a/assets/css/header.css b/assets/css/header.css
index 846ecf1..b03e7b5 100644
--- a/assets/css/header.css
+++ b/assets/css/header.css
@@ -158,13 +158,14 @@
 
 /* Per-environment gradient themes — !important keeps the gradient fixed
    under the brass hover overlay (ui.css :hover rules load later). */
-.scope-env-row[data-env="open"]      .cs-btn.on { background: linear-gradient(135deg, #7ec8e3 0%, #c8922a 100%) !important; border-color: #a07020 !important; color: #fff; }
+.scope-env-row[data-env="open"]      .cs-btn.on { background: linear-gradient(135deg, #5a8a28 0%, #b8d860 100%) !important; border-color: #4a7818 !important; color: #fff; }
 .scope-env-row[data-env="forest"]    .cs-btn.on { background: linear-gradient(135deg, #1b5e3b 0%, #57bf8a 100%) !important; border-color: #1b5e3b !important; color: #fff; }
 .scope-env-row[data-env="alpine"]    .cs-btn.on { background: linear-gradient(135deg, #a8cfe8 0%, #dff0fa 100%) !important; border-color: #6aaedd !important; color: #1a3a58; }
 .scope-env-row[data-env="beach"]     .cs-btn.on { background: linear-gradient(135deg, #2a8fc8 0%, #e8d87a 100%) !important; border-color: #1e78b0 !important; color: #fff; }
 .scope-env-row[data-env="river"]     .cs-btn.on { background: linear-gradient(135deg, #2e6e5e 0%, #78c4a8 100%) !important; border-color: #2e6e5e !important; color: #fff; }
 .scope-env-row[data-env="desert"]    .cs-btn.on { background: linear-gradient(135deg, #b86820 0%, #e8c458 100%) !important; border-color: #a05818 !important; color: #fff; }
 .scope-env-row[data-env="openwater"] .cs-btn.on { background: linear-gradient(135deg, #0c4878 0%, #2898d8 100%) !important; border-color: #0c4878 !important; color: #fff; }
+.scope-env-row[data-env="urban"]     .cs-btn.on { background: linear-gradient(135deg, #4a5568 0%, #a89880 100%) !important; border-color: #3a4455 !important; color: #fff; }
 
 /* On hover the brass overlay covers the interior — force white text for contrast */
 .scope-env-row .cs-btn.on:hover { color: #fff; }
diff --git a/assets/js/config.js b/assets/js/config.js
index f2af372..aeb57f5 100644
--- a/assets/js/config.js
+++ b/assets/js/config.js
@@ -122,13 +122,14 @@ export const POLLEN_TYPES = {
 //   label      - short display name
 //   note       - shown in column header tooltip to flag modified calculation
 export const UTCI_ENVIRONMENTS = {
-  open:      { shortLabel: null,           label: 'Open / Exposed',         dirFactor: 1.00, difFactor: 1.00, globFactor: 1.00, taOffset:  0.0, note: null },
-  forest:    { shortLabel: 'Forest',       label: 'Forest / Woodland',       dirFactor: 0.15, difFactor: 0.40, globFactor: 0.20, taOffset: -2.0, note: 'Canopy-shaded estimate - direct radiation reduced 85%, air temp adjusted for evapotranspiration cooling' },
-  alpine:    { shortLabel: 'Alpine',       label: 'High Altitude / Alpine',  dirFactor: 1.15, difFactor: 1.10, globFactor: 1.12, taOffset: -1.0, note: 'Alpine estimate assuming approx. 2000 m elevation - radiation enhanced ~15% through thinner atmosphere, adjusted for exposed ridge conditions' },
+  open:      { shortLabel: null,           label: 'Grass / Open Field',      dirFactor: 1.00, difFactor: 1.00, globFactor: 1.00, taOffset:  0.0, note: null },
+  urban:     { shortLabel: 'City',         label: 'Town / City',             dirFactor: 0.70, difFactor: 0.75, globFactor: 0.82, taOffset:  2.5, note: 'Urban heat island estimate - UHI raises air temp ~2–3 °C, building canyons reduce direct and diffuse solar load, reflections from concrete and glass partially offset sky-view reduction' },
   beach:     { shortLabel: 'Beach',        label: 'Beach / Lakeside',        dirFactor: 1.12, difFactor: 1.06, globFactor: 1.10, taOffset:  0.0, note: 'Reflected radiation from water and sand surfaces increases effective solar load - no shade, higher UV dose' },
   river:     { shortLabel: 'Riverbank',    label: 'River / Riverbank',       dirFactor: 0.50, difFactor: 0.60, globFactor: 0.55, taOffset: -2.5, note: 'Shaded riverbank estimate - canopy and valley walls reduce direct sun, evaporative cooling from water surface lowers apparent air temp' },
-  desert:    { shortLabel: 'Desert',       label: 'Desert / Arid',           dirFactor: 1.22, difFactor: 1.10, globFactor: 1.18, taOffset:  3.5, note: 'Extreme radiation load from high albedo sand and bare ground - ground-level heat significantly raises effective felt temperature' },
+  forest:    { shortLabel: 'Forest',       label: 'Forest / Woodland',       dirFactor: 0.15, difFactor: 0.40, globFactor: 0.20, taOffset: -2.0, note: 'Canopy-shaded estimate - direct radiation reduced 85%, air temp adjusted for evapotranspiration cooling' },
   openwater: { shortLabel: 'Open Water',   label: 'Open Water',              dirFactor: 1.14, difFactor: 1.08, globFactor: 1.12, taOffset:  0.0, note: 'Open water - full solar exposure with additional radiation reflected from the water surface, no shade or shelter, no ground heat contribution' },
+  alpine:    { shortLabel: 'Alpine',       label: 'High Altitude / Alpine',  dirFactor: 1.15, difFactor: 1.10, globFactor: 1.12, taOffset: -1.0, note: 'Alpine estimate assuming approx. 2000 m elevation - radiation enhanced ~15% through thinner atmosphere, adjusted for exposed ridge conditions' },
+  desert:    { shortLabel: 'Desert',       label: 'Desert / Arid',           dirFactor: 1.22, difFactor: 1.10, globFactor: 1.18, taOffset:  3.5, note: 'Extreme radiation load from high albedo sand and bare ground - ground-level heat significantly raises effective felt temperature' },
 };
 
 // Maps OUTDOORS_VARIANTS keys to a default UTCI_ENVIRONMENTS key.
@@ -139,11 +140,16 @@ export const VARIANT_DEFAULT_ENV = {
   forest:      'forest',
   park:        'forest',
   beach:       'beach',
-  sailing:     'beach',
+  sailing:     'openwater',
   hiking:      'alpine',
   wintersports:'alpine',
   fishing:     'river',
   naturist:    'beach',
+  urban:       'urban',
+  farming:     'open',
+  construction:'urban',
+  office:      'urban',
+  windowcleaning:'urban',
 };
 
 // Left-to-right order of the profile buttons in the top filter bar.
diff --git a/assets/js/hooks/useAppState.js b/assets/js/hooks/useAppState.js
index c915064..d6ab5f1 100644
--- a/assets/js/hooks/useAppState.js
+++ b/assets/js/hooks/useAppState.js
@@ -154,6 +154,9 @@ export function useAppState() {
       const hasIndoor = profile.cols['indoorT'] || profile.cols['managedT'];
       setIndoorMode(hasIndoor ? 'on' : 'off');
       setIndoorManaged(false);
+      if (hasIndoor) setBuildingTypeAndSave('brick');
+      const defaultEnv = VARIANT_DEFAULT_ENV[key];
+      if (defaultEnv) setUtciEnvAndSave(defaultEnv);
     } else {
       // Custom profile initializes from config - blank slate, user picks columns.
       const customCols = FILTER_PROFILES.custom?.cols;