diff --git a/app/public/app.js b/app/public/app.js
index bf8df08..4a287ec 100644
--- a/app/public/app.js
+++ b/app/public/app.js
@@ -122,6 +122,7 @@ const contrastToggle = document.getElementById('contrast-toggle');
 const contrastStatus = document.getElementById('contrast-status');
 const radarOpacityEl = document.getElementById('radar-opacity');
 const lightningAgeEl = document.getElementById('lightning-age');
+const mapsFullscreenBtn = document.getElementById('maps-fullscreen-btn');
 
 // ── Helpers ──────────────────────────────────────────────────────────────────
 const show = el => el.classList.remove('hidden');
@@ -466,6 +467,8 @@ document.querySelectorAll('.tab').forEach(btn => {
     }
     if (btn.dataset.tab === 'maps') {
       setTimeout(refreshMapsOverview, 80);
+    } else {
+      setMapsFullscreen(false);
     }
   });
 });
@@ -731,9 +734,33 @@ function createOverviewMap(mapEl) {
 
   const radarLayer = L.tileLayer('https://tilecache.rainviewer.com/v2/radar/nowcast_0/256/{z}/{x}/{y}/2/1_1.png', {
     maxZoom: 15,
-    opacity: Math.max(0.15, Math.min(0.9, state.radarOpacity / 100)),
+    opacity: Math.max(0.25, Math.min(0.9, state.radarOpacity / 100)),
   }).addTo(map);
 
+  let lastRadarFramePath = null;
+
+  async function refreshRadarOverlay() {
+    try {
+      const r = await fetch('/api/radar/times');
+      if (!r.ok) return;
+      const data = await r.json();
+      const frames = [
+        ...(data?.radar?.past || []),
+        ...(data?.radar?.nowcast || []),
+      ];
+      const latest = frames[frames.length - 1];
+      const path = latest?.path;
+      if (!path || path === lastRadarFramePath) return;
+      lastRadarFramePath = path;
+      radarLayer.setUrl(`https://tilecache.rainviewer.com${path}/256/{z}/{x}/{y}/2/1_1.png`);
+    } catch (e) {
+      console.warn('Maps radar overlay refresh failed', e);
+    }
+  }
+
+  refreshRadarOverlay();
+  setInterval(refreshRadarOverlay, 5 * 60 * 1000);
+
   let marker = null;
 
   function panTo(lat, lon, zoom) {
@@ -749,11 +776,11 @@ function createOverviewMap(mapEl) {
   }
 
   function setRadarOpacity(opacityPct) {
-    const normalized = Math.max(0.15, Math.min(0.9, Number(opacityPct) / 100));
+    const normalized = Math.max(0.25, Math.min(0.9, Number(opacityPct) / 100));
     radarLayer.setOpacity(normalized);
   }
 
-  return { map, panTo, setRadarOpacity };
+  return { map, panTo, setRadarOpacity, refreshRadarOverlay };
 }
 
 function clearLightningLayer() {
@@ -774,6 +801,7 @@ function refreshMapsOverview() {
   if (!mapsOverview.map) return;
 
   mapsOverview.map.invalidateSize();
+  mapsOverview.refreshRadarOverlay();
 
   if (!state.currentCity) return;
 
@@ -906,6 +934,50 @@ function renderWindArrows(city) {
 
 const mapsOverview = createOverviewMap(document.getElementById('map-overview'));
 
+function setMapsFullscreen(active) {
+  const wrap = document.querySelector('#tab-maps .maps-wrap');
+  if (!wrap) return;
+  wrap.classList.toggle('is-fullscreen', active);
+  document.body.classList.toggle('map-fullscreen-lock', active);
+  if (mapsFullscreenBtn) {
+    mapsFullscreenBtn.textContent = active ? 'Exit fullscreen' : 'Fullscreen map';
+  }
+  setTimeout(() => {
+    if (mapsOverview?.map) mapsOverview.map.invalidateSize();
+  }, 100);
+}
+
+if (mapsFullscreenBtn) {
+  mapsFullscreenBtn.addEventListener('click', async () => {
+    const wrap = document.querySelector('#tab-maps .maps-wrap');
+    if (!wrap) return;
+
+    if (document.fullscreenElement === wrap) {
+      await document.exitFullscreen().catch(() => {});
+      setMapsFullscreen(false);
+      return;
+    }
+
+    if (wrap.requestFullscreen) {
+      try {
+        await wrap.requestFullscreen();
+        setMapsFullscreen(true);
+        return;
+      } catch {
+        // Some mobile browsers reject Fullscreen API; fallback below.
+      }
+    }
+
+    setMapsFullscreen(!wrap.classList.contains('is-fullscreen'));
+  });
+}
+
+document.addEventListener('fullscreenchange', () => {
+  const wrap = document.querySelector('#tab-maps .maps-wrap');
+  if (!wrap) return;
+  setMapsFullscreen(document.fullscreenElement === wrap);
+});
+
 // ── Rendering ────────────────────────────────────────────────────────────────
 function renderDailyForecast(daily) {
   const list = document.getElementById('daily-list');
diff --git a/app/public/index.html b/app/public/index.html
index 48ee8bc..935583a 100644
--- a/app/public/index.html
+++ b/app/public/index.html
@@ -158,6 +158,12 @@
 
   <!-- ── TAB: MAPS ── -->
   <div id="tab-maps" class="tab-panel hidden">
+    <div class="section-head">
+      <span class="section-label">Maps</span>
+      <span class="section-actions">
+        <button id="maps-fullscreen-btn" class="link-btn" type="button">Fullscreen map</button>
+      </span>
+    </div>
     <div class="maps-wrap">
       <div id="map-overview" class="radar-map map-overview"></div>
       <div class="maps-controls">
diff --git a/app/public/style.css b/app/public/style.css
index de45d75..db53761 100644
--- a/app/public/style.css
+++ b/app/public/style.css
@@ -167,6 +167,7 @@ a:hover { text-decoration: underline; }
 .search-row {
   display: flex;
   align-items: center;
+  flex-wrap: nowrap;
   gap: 0;
   border: 1px solid var(--line);
   border-radius: var(--radius-lg);
@@ -195,6 +196,7 @@ button, input, select { font-family: var(--ui); }
 }
 
 .search-row button {
+  flex: 0 0 auto;
   min-height: 46px;
   border: none;
   border-left: 1px solid var(--line);
@@ -205,18 +207,25 @@ button, input, select { font-family: var(--ui); }
 #search-btn {
   background: linear-gradient(180deg, #15445f 0%, #11344c 100%);
   color: #f2f8fc;
-  text-transform: uppercase;
-  letter-spacing: 0.03em;
-  font-weight: 700;
-  min-width: 96px;
-  font-size: 0.78rem;
+  min-width: 52px;
+  width: 52px;
+  font-size: 0;
+  letter-spacing: 0;
+  text-transform: none;
+  padding: 0;
+}
+
+#search-btn::before {
+  content: '🔎';
+  font-size: 1rem;
+  line-height: 1;
 }
 
 #locate-btn,
 #units-btn {
   background: var(--surface) !important;
   color: var(--ink) !important;
-  min-width: 50px;
+  min-width: 48px;
 }
 
 #locate-btn {
@@ -224,34 +233,15 @@ button, input, select { font-family: var(--ui); }
 }
 
 @media (max-width: 390px) {
-  #search-btn {
-    min-width: 84px;
-    font-size: 0.72rem;
-  }
-
+  #search-btn,
   #locate-btn,
   #units-btn {
     min-width: 46px;
+    width: 46px;
     padding: 0 0.5rem;
   }
 }
 
-@media (max-width: 460px) {
-  #search-btn {
-    min-width: 48px;
-    font-size: 0;
-    letter-spacing: 0;
-    text-transform: none;
-    padding: 0;
-  }
-
-  #search-btn::before {
-    content: '🔎';
-    font-size: 1rem;
-    line-height: 1;
-  }
-}
-
 .suggestions {
   list-style: none;
   margin-top: 0.3rem;
@@ -668,6 +658,32 @@ button, input, select { font-family: var(--ui); }
   padding: 0.35rem 0.55rem;
 }
 
+#maps-fullscreen-btn {
+  font-size: 0.78rem;
+  font-weight: 700;
+}
+
+body.map-fullscreen-lock {
+  overflow: hidden;
+}
+
+.maps-wrap.is-fullscreen {
+  position: fixed;
+  inset: 0;
+  z-index: 520;
+  margin: 0;
+  border-radius: 0;
+  border: none;
+  background: var(--paper);
+  overflow-y: auto;
+  padding: calc(0.65rem + env(safe-area-inset-top, 0px)) 0.65rem calc(0.65rem + env(safe-area-inset-bottom, 0px));
+}
+
+.maps-wrap.is-fullscreen .map-overview {
+  height: calc(100dvh - 210px);
+  min-height: 320px;
+}
+
 .wind-legend {
   display: flex;
   align-items: center;