feat(ui): enhance Countdown and layout components

* Improve Countdown component styling and structure
* Update layout to include responsive menu and background pattern
* Adjust PhotoBackground and page styles for better presentation
* Add damask pattern SVG for background use

ui/src/routes/+layout.svelte

@@ -1,45 +1,93 @@
 <script lang="ts">
-	import '../app.css';
-	import favicon from '$lib/assets/favicon.svg';
-	import { page } from '$app/state';
-	import Countdown from '$lib/components/Countdown.svelte';
-	import { createWeddingInfo } from '$lib/wedding-info.svelte';
+  import "../app.css";
+  import favicon from "$lib/assets/favicon.svg";
+  import { page } from "$app/state";
+  import Countdown from "$lib/components/Countdown.svelte";
+  import { createWeddingInfo } from "$lib/wedding-info.svelte";
 
-	let { children } = $props();
+  let { children } = $props();
 
-	const wedding = createWeddingInfo();
+  const wedding = createWeddingInfo();
 
-	const links = [
-		{ href: '/', label: 'Home' },
-		{ href: '/rsvp', label: 'RSVP' },
-		{ href: '/photos', label: 'Photos' }
-	];
+  const links = [
+    { href: "/", label: "Home" },
+    { href: "/rsvp", label: "RSVP" },
+    { href: "/photos", label: "Photos" },
+  ];
+
+  let menuOpen = $state(false);
+
+  $effect(() => {
+    page.url.pathname;
+    menuOpen = false;
+  });
 </script>
 
 <svelte:head><link rel="icon" href={favicon} /></svelte:head>
 
-<div class="bg-surface-50 dark:bg-surface-950 flex min-h-screen flex-col">
-	<div class="sticky top-0 z-20 flex flex-col">
-		<nav class="bg-primary-950 flex items-center justify-between px-4 py-3 sm:px-8">
-			<a href="/" class="text-surface-50 font-malibu text-xl tracking-wide">Zoé &amp; Shaldon</a>
-			<div class="flex gap-2">
-				{#each links as link (link.href)}
-					<a
-						href={link.href}
-						class="btn field-sm {page.url.pathname === link.href
-							? 'preset-filled-secondary-500'
-							: 'text-surface-100 hover:text-secondary-400'}"
-					>
-						{link.label}
-					</a>
-				{/each}
-			</div>
-		</nav>
-		<div class="text-surface-50 flex justify-center px-4 py-3 drop-shadow-[0_2px_6px_rgba(0,0,0,0.6)]">
-			<Countdown target={wedding.date} compact pastMessage="Already married! 🎉" />
-		</div>
-	</div>
-	<main class="flex flex-1 flex-col">
-		{@render children()}
-	</main>
+<div
+	class="bg-surface-50 dark:bg-surface-950 flex min-h-screen flex-col bg-[url('/patterns/damask.svg')] bg-repeat [background-size:160px_160px]"
+>
+  <div class="sticky top-0 z-20 flex flex-col">
+    <nav
+      class="bg-primary-950 flex items-center justify-between px-4 py-3 sm:px-8"
+    >
+      <a
+        href="/"
+        class="text-surface-50 font-malibu hidden text-3xl tracking-wide sm:inline"
+        >Zoé &amp; Shaldon</a
+      >
+      <Countdown
+        target={wedding.date}
+        compact
+        pastMessage="Already married! 🎉"
+      />
+      <div class="hidden gap-2 sm:flex">
+        {#each links as link (link.href)}
+          <a
+            href={link.href}
+            class="btn field-sm {page.url.pathname === link.href
+              ? 'preset-filled-secondary-500'
+              : 'text-surface-100 hover:text-secondary-400'}"
+          >
+            {link.label}
+          </a>
+        {/each}
+      </div>
+      <button
+        type="button"
+        class="text-surface-50 flex items-center justify-center p-2 sm:hidden"
+        aria-label="Menu"
+        aria-expanded={menuOpen}
+        onclick={() => (menuOpen = !menuOpen)}
+      >
+        {#if menuOpen}
+          <svg viewBox="0 0 24 24" class="size-6" fill="none" stroke="currentColor" stroke-width="2">
+            <path stroke-linecap="round" d="M6 6l12 12M18 6L6 18" />
+          </svg>
+        {:else}
+          <svg viewBox="0 0 24 24" class="size-6" fill="none" stroke="currentColor" stroke-width="2">
+            <path stroke-linecap="round" d="M4 7h16M4 12h16M4 17h16" />
+          </svg>
+        {/if}
+      </button>
+    </nav>
+    {#if menuOpen}
+      <div class="bg-primary-950 border-primary-800 flex flex-col gap-1 border-t px-4 py-3 sm:hidden">
+        {#each links as link (link.href)}
+          <a
+            href={link.href}
+            class="btn field-sm w-full {page.url.pathname === link.href
+              ? 'preset-filled-secondary-500'
+              : 'text-surface-100 hover:text-secondary-400'}"
+          >
+            {link.label}
+          </a>
+        {/each}
+      </div>
+    {/if}
+  </div>
+  <main class="flex flex-1 flex-col">
+    {@render children()}
+  </main>
 </div>

ui/src/routes/+page.svelte

@@ -8,7 +8,7 @@
 </script>
 
 <section
-  class="relative flex flex-1 items-center justify-center overflow-hidden px-4 py-16 text-center"
+  class="relative flex flex-1 items-center justify-center overflow-hidden px-4 py-16 text-center z-10"
 >
   <PhotoBackground />
 

ui/src/routes/photos/+page.svelte

@@ -65,7 +65,7 @@
 	{#if !isOpen}
 		<div class="flex flex-col items-center gap-6 text-center">
 			<h1 class="font-serif text-4xl">Photo uploads open on the wedding day</h1>
-			<p class="text-surface-600-400 text-lg">Come back on {formatFullDate(wedding.date)} to share your photos with Zoé &amp; Shaldon.</p>
+			<p class="text-surface-600-400 text-2xl">Come back on {formatFullDate(wedding.date)} to share your photos with Zoé &amp; Shaldon.</p>
 		</div>
 	{:else if status === 'done'}
 		<div class="preset-filled-primary-500 rounded-base max-w-md p-4 text-center">
@@ -74,36 +74,36 @@
 	{:else}
 		<div class="w-full max-w-md">
 			<h1 class="font-serif text-4xl">Share your photos</h1>
-			<p class="text-surface-600-400 mt-2 mb-8 text-lg">
+			<p class="text-surface-600-400 mt-2 mb-8 text-2xl">
 				Upload photos from the day — up to {MAX_FILES} at a time, {MAX_SIZE_MB}MB each.
 			</p>
 
 			<form class="flex flex-col gap-4" onsubmit={onSubmit}>
 				<label class="label">
-					<span class="label-text">Name *</span>
-					<input class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700" type="text" required bind:value={name} disabled={status === 'submitting'} />
+					<span class="label-text text-2xl">Name *</span>
+					<input class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700 text-2xl" type="text" required bind:value={name} disabled={status === 'submitting'} />
 				</label>
 
 				<label class="label">
-					<span class="label-text">Message to the couple (optional)</span>
-					<textarea class="textarea border border-surface-300 focus:border-primary-500 dark:border-surface-700" rows="3" bind:value={message} disabled={status === 'submitting'}
+					<span class="label-text text-2xl">Message to the couple (optional)</span>
+					<textarea class="textarea border border-surface-300 focus:border-primary-500 dark:border-surface-700 text-2xl" rows="3" bind:value={message} disabled={status === 'submitting'}
 					></textarea>
 				</label>
 
 				<label class="label">
-					<span class="label-text">Email (optional)</span>
-					<input class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700" type="email" bind:value={email} disabled={status === 'submitting'} />
+					<span class="label-text text-2xl">Email (optional)</span>
+					<input class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700 text-2xl" type="email" bind:value={email} disabled={status === 'submitting'} />
 				</label>
 
 				<label class="label">
-					<span class="label-text">Phone (optional)</span>
-					<input class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700" type="tel" bind:value={phone} disabled={status === 'submitting'} />
+					<span class="label-text text-2xl">Phone (optional)</span>
+					<input class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700 text-2xl" type="tel" bind:value={phone} disabled={status === 'submitting'} />
 				</label>
 
 				<label class="label">
-					<span class="label-text">Photos *</span>
+					<span class="label-text text-2xl">Photos *</span>
 					<input
-						class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700"
+						class="input border border-surface-300 focus:border-primary-500 dark:border-surface-700 text-2xl"
 						type="file"
 						accept="image/*"
 						multiple
@@ -114,10 +114,10 @@
 				</label>
 
 				{#if status === 'error'}
-					<p class="text-error-500 text-base">{errorMessage}</p>
+					<p class="text-error-500 text-2xl">{errorMessage}</p>
 				{/if}
 
-				<button class="btn preset-filled-secondary-500 mt-2" type="submit" disabled={status === 'submitting'}>
+				<button class="btn preset-filled-secondary-500 mt-2 text-2xl" type="submit" disabled={status === 'submitting'}>
 					{status === 'submitting' ? 'Uploading…' : 'Upload photos'}
 				</button>
 			</form>

ui/src/routes/qr/+page.svelte

@@ -7,7 +7,7 @@
 
 <section class="flex flex-1 items-center justify-center px-4 py-16">
 	<div class="border-surface-300 dark:border-surface-700 flex flex-col items-center gap-4 border px-6 py-10 text-center">
-		<p class="text-primary-600-400 text-base tracking-[0.25em] uppercase">Scan to visit</p>
+		<p class="text-primary-600-400 text-2xl tracking-[0.25em] uppercase">Scan to visit</p>
 		<h1 class="font-malibu text-4xl">Zoé &amp; Shaldon</h1>
 
 		<QrCode value={wedding.siteUrl} class="flex flex-col items-center gap-4">
@@ -15,7 +15,7 @@
 				<QrCode.Pattern />
 			</QrCode.Frame>
 
-			<p class="text-surface-700 dark:text-surface-300 text-base break-all">{wedding.siteUrl}</p>
+			<p class="text-surface-700 dark:text-surface-300 text-2xl break-all">{wedding.siteUrl}</p>
 
 			<QrCode.DownloadTrigger mimeType="image/png" fileName="zoe-and-shaldon-qr.png">
 				Download PNG

ui/src/routes/rsvp/+page.svelte

@@ -60,7 +60,7 @@
 </script>
 
 <section
-  class="relative flex flex-1 items-center justify-center overflow-hidden px-4 py-16"
+  class="relative flex flex-1 items-center justify-center overflow-hidden px-4 py-16 z-10"
 >
   <PhotoBackground />
 
@@ -159,7 +159,7 @@
         </div>
 
         <label class="label">
-          <span class="label-text text-surface-100"
+          <span class="label-text text-surface-100 text-2xl"
             >Message to the couple (optional)</span
           >
           <textarea