Event banner also a popup/flyout

assets/css/ui.css

@@ -5,27 +5,26 @@
 /* ── 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).           */
+/* Flyout: a fixed panel pinned to the very top of the screen that slides
+   down over everything (including the nav) and retracts upward on close.   */
 .event-banner-wrap {
-  display: grid;
-  grid-template-rows: 0fr;
-  transition: grid-template-rows 0.45s cubic-bezier(0.4, 0, 0.2, 1);
-  position: absolute;
+  position: fixed;
   top: 0;
   left: 0;
   right: 0;
-  z-index: 10;
-}
-.event-banner-wrap > * {
-  overflow: hidden;
+  z-index: 9999;
+  display: flex;
+  justify-content: center;
+  padding: 0 14px;
+  transform: translateY(-130%);
+  transition: transform 0.5s cubic-bezier(0.34, 1.25, 0.64, 1);
+  /* The wrap is full-width but the panel is centred — keep the wrap itself
+     click-through so its transparent sides never block the nav beneath it.
+     Only the visible banner panel (.event-banner) captures clicks. */
+  pointer-events: none;
 }
 .event-banner-wrap.visible {
-  grid-template-rows: 1fr;
-}
-/* When closing, fade the content out before the row collapses */
-.event-banner-wrap:not(.visible) .event-banner-stage {
-  opacity: 0;
+  transform: translateY(0);
 }
 
 /* Slide crossfade: both banners rendered simultaneously, fading into each other */
@@ -38,13 +37,13 @@
   to   { opacity: 0; }
 }
 
-/* Container that holds both slides during a crossfade */
-/* Also fades in/out with the wrap open/close */
+/* Container that holds both slides during a crossfade. Constrains the
+   flyout to a centred panel width and clips the absolute outgoing slide. */
 .event-banner-stage {
-  opacity: 1;
-  transition: opacity 0.35s ease;
   position: relative;
-  margin-bottom: 12px;
+  overflow: hidden;
+  width: 100%;
+  max-width: 720px;
 }
 
 /* True crossfade — outgoing slide sits absolutely on top and fades out */
@@ -52,11 +51,14 @@
   display: flex;
   align-items: center;
   gap: 14px;
-  padding: 13px 18px;
-  border-radius: 4px;
+  padding: 14px 18px;
+  border-radius: 0 0 12px 12px;     /* rounded bottom — it hangs from the top edge */
   position: relative;
   z-index: 1;
   border-left: 4px solid rgba(255,255,255,0.25);
+  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
+  cursor: pointer;                  /* whole banner is click-to-close */
+  pointer-events: auto;             /* re-enable clicks on the panel itself */
 }
 .event-banner--outgoing {
   position: absolute;
@@ -67,10 +69,6 @@
   pointer-events: none;
   animation: banner-fade-out 0.45s ease both;
 }
-.event-banner-stage {
-  position: relative;
-  overflow: hidden;
-}
 .event-banner-emoji {
   font-size: 24px;
   flex-shrink: 0;
@@ -285,8 +283,7 @@
 /* ── EVENT BANNER — mobile fixes ────────────────────────────────────── */
 @media (max-width: 640px) {
   .event-banner-wrap {
-    margin-top: 0;               /* JS pins the banner's top to the nav's bottom edge */
-    margin-bottom: 0;
+    padding: 0;                  /* full-bleed flyout on small screens */
   }
 
   .event-banner {
@@ -294,7 +291,7 @@
     gap: 10px;
     padding: 18px 12px 14px 14px;
     margin-bottom: 0;
-    border-radius: 4px;
+    border-radius: 0 0 12px 12px;
   }
 
   .event-banner-emoji {