Add tab icons, fix mobile nav overflow, and soften card styling

app/public/index.html

@@ -23,11 +23,26 @@
   <header class="masthead">
     <h1>Weather</h1>
     <nav class="tabs">
-      <button class="tab active" data-tab="conditions">Conditions</button>
-      <button class="tab" data-tab="radar-full">Radar</button>
-      <button class="tab" data-tab="maps">Maps</button>
-      <button class="tab" data-tab="alerts">Alerts</button>
-      <button class="tab" data-tab="settings">Settings</button>
+      <button class="tab active" data-tab="conditions" aria-label="Conditions">
+        <span class="tab-icon" aria-hidden="true">☀</span>
+        <span class="tab-text">Now</span>
+      </button>
+      <button class="tab" data-tab="radar-full" aria-label="Radar">
+        <span class="tab-icon" aria-hidden="true">◉</span>
+        <span class="tab-text">Radar</span>
+      </button>
+      <button class="tab" data-tab="maps" aria-label="Maps">
+        <span class="tab-icon" aria-hidden="true">⌘</span>
+        <span class="tab-text">Maps</span>
+      </button>
+      <button class="tab" data-tab="alerts" aria-label="Alerts">
+        <span class="tab-icon" aria-hidden="true">⚠</span>
+        <span class="tab-text">Alerts</span>
+      </button>
+      <button class="tab" data-tab="settings" aria-label="Settings">
+        <span class="tab-icon" aria-hidden="true">⚙</span>
+        <span class="tab-text">Settings</span>
+      </button>
     </nav>
     <span class="tagline">Open-Meteo · RainViewer</span>
   </header>