Added mobile hamburger.

frontend/src/App.svelte

@@ -23,6 +23,7 @@
   let loading = $state(true)
   let route = $state(window.location.hash || '#/')
   let updateAvailable = $state(false)
+  let mobileNavOpen = $state(false)
 
   // Check if this is a kiosk token URL before doing anything else
   const kioskToken = $derived(window.location.hash.match(/^#\/v\/([A-Z0-9]+)/i)?.[1] ?? '')
@@ -52,6 +53,7 @@
     }
     window.addEventListener('hashchange', () => {
       route = window.location.hash || '#/'
+      mobileNavOpen = false
     })
 
     // Periodically check for updates
@@ -92,8 +94,18 @@
   <GateUI {session} {onLogout} />
 {:else}
   <div class="layout">
-    <Nav {session} {onLogout} active={path} />
+    <!-- svelte-ignore a11y_no_static_element_interactions -->
+    {#if mobileNavOpen}
+      <div class="nav-overlay" onclick={() => mobileNavOpen = false} onkeydown={() => {}}></div>
+    {/if}
+    <Nav {session} {onLogout} active={path} open={mobileNavOpen} />
     <div class="main">
+      <header class="mobile-header">
+        <button class="hamburger" onclick={() => mobileNavOpen = !mobileNavOpen} aria-label="Menu">
+          <span></span><span></span><span></span>
+        </button>
+        <span class="mobile-brand">Turn<span class="accent">pike</span></span>
+      </header>
       {#if path === '/' || path === ''}
         {#if role === 'volunteer_lead'}
           <ScheduleBoard {session} />

frontend/src/app.css

@@ -170,8 +170,39 @@ tr:hover td { background: rgba(255,255,255,0.02); }
 
 @keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
 
+/* Mobile header — hidden on desktop */
+.mobile-header { display: none; }
+
 @media (max-width: 640px) {
-  .sidebar { display: none; }
+  .mobile-header {
+    display: flex;
+    align-items: center;
+    gap: 0.75rem;
+    padding: 0.75rem 1rem;
+    background: var(--c-surface);
+    border-bottom: 1px solid var(--c-border);
+  }
+  .mobile-brand { font-weight: 700; font-size: 1rem; }
+  .mobile-brand .accent { color: var(--c-accent); }
+  .hamburger {
+    display: flex; flex-direction: column; gap: 4px;
+    background: none; border: none; padding: 4px; cursor: pointer;
+  }
+  .hamburger span {
+    display: block; width: 20px; height: 2px;
+    background: var(--c-text); border-radius: 1px;
+    transition: transform var(--transition), opacity var(--transition);
+  }
+  .sidebar {
+    position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
+    transform: translateX(-100%);
+    transition: transform 200ms ease;
+  }
+  .sidebar.open { transform: translateX(0); }
+  .nav-overlay {
+    position: fixed; inset: 0; z-index: 99;
+    background: rgba(0,0,0,0.5);
+  }
   .page { padding: 1rem; }
   .stats { grid-template-columns: repeat(2, 1fr); }
 }

frontend/src/components/Nav.svelte

@@ -1,5 +1,5 @@
 <script>
-  let { session, active, onLogout } = $props()
+  let { session, active, onLogout, open = false } = $props()
 
   const role = $derived(session?.user?.role ?? '')
 
@@ -42,7 +42,7 @@
   }
 </script>
 
-<nav class="sidebar">
+<nav class="sidebar" class:open>
   <div class="sidebar-brand">Turn<span>pike</span></div>
   {#each links as link}
     <a href={link.href} class="nav-link" class:active={isActive(link.href)}>