Update src/App.svelte

src/App.svelte

@@ -1,8 +1,5 @@
-<!-- src/App.svelte -->
 <script lang="ts">
   import { onMount } from 'svelte';
-  import Card from './lib/Card.svelte';
-  import Chart from './lib/Chart.svelte';
 
   let loading = true;
   let error: string | null = null;
@@ -15,16 +12,13 @@
 
   onMount(async () => {
     try {
-      // Simulate API call
       await new Promise(resolve => setTimeout(resolve, 1000));
-      
       stats = {
         revenue: 124500,
         users: 2341,
         orders: 342,
         conversion: 3.2
       };
-      
       loading = false;
     } catch (err) {
       error = 'Failed to load dashboard data';
@@ -32,20 +26,170 @@
     }
   });
 
-  const formatCurrency = (amount: number) => {
-    return new Intl.NumberFormat('en-US', {
+  const formatCurrency = (amount: number) =>
+    new Intl.NumberFormat('en-US', {
       style: 'currency',
       currency: 'USD',
       minimumFractionDigits: 0,
       maximumFractionDigits: 0
     }).format(amount);
-  };
 
-  const formatNumber = (num: number) => {
-    return new Intl.NumberFormat('en-US').format(num);
-  };
+  const formatNumber = (num: number) =>
+    new Intl.NumberFormat('en-US').format(num);
 </script>
 
+<svelte:head>
+  <style>
+    :root {
+      --primary: #3b82f6;
+      --success: #10b981;
+      --danger: #ef4444;
+      --gray-50: #f9fafb;
+      --gray-100: #f3f4f6;
+      --gray-200: #e5e7eb;
+      --gray-300: #d1d5db;
+      --gray-400: #9ca3af;
+      --gray-500: #6b7280;
+      --gray-600: #4b5563;
+      --gray-700: #374151;
+      --gray-800: #1f2937;
+      --gray-900: #111827;
+    }
+
+    * { box-sizing: border-box; }
+
+    body {
+      margin: 0;
+      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+      background-color: var(--gray-50);
+      color: var(--gray-900);
+      line-height: 1.5;
+    }
+
+    .container {
+      max-width: 1200px;
+      margin: 0 auto;
+      padding: 2rem 1rem;
+    }
+
+    header { margin-bottom: 2rem; }
+
+    h1 {
+      margin: 0;
+      font-size: 2rem;
+      font-weight: 700;
+      color: var(--gray-900);
+    }
+
+    .subtitle {
+      margin: 0.25rem 0 0;
+      color: var(--gray-600);
+    }
+
+    .grid {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+      gap: 1.5rem;
+      margin-bottom: 2rem;
+    }
+
+    .loading, .error {
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      justify-content: center;
+      min-height: 400px;
+      color: var(--gray-500);
+    }
+
+    .spinner {
+      width: 40px;
+      height: 40px;
+      border: 4px solid var(--gray-200);
+      border-top: 4px solid var(--primary);
+      border-radius: 50%;
+      animation: spin 1s linear infinite;
+    }
+
+    @keyframes spin {
+      0% { transform: rotate(0deg); }
+      100% { transform: rotate(360deg); }
+    }
+
+    .error { color: var(--danger); }
+
+    .card {
+      background: white;
+      border-radius: 0.5rem;
+      padding: 1.5rem;
+      box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
+      transition: box-shadow 0.15s;
+    }
+
+    .card:hover {
+      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
+    }
+
+    .card-title {
+      margin: 0 0 0.5rem;
+      font-size: 0.875rem;
+      font-weight: 500;
+      color: var(--gray-600);
+      text-transform: uppercase;
+      letter-spacing: 0.05em;
+    }
+
+    .card-value {
+      margin: 0;
+      font-size: 1.875rem;
+      font-weight: 700;
+      color: var(--gray-900);
+    }
+
+    .card-change {
+      margin-top: 0.5rem;
+      font-size: 0.875rem;
+      font-weight: 500;
+    }
+
+    .positive { color: var(--success); }
+    .negative { color: var(--danger); }
+
+    .chart-section {
+      background: white;
+      border-radius: 0.5rem;
+      padding: 1.5rem;
+      box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
+    }
+
+    .chart-section h2 {
+      margin: 0 0 1rem;
+      font-size: 1.25rem;
+      font-weight: 600;
+      color: var(--gray-900);
+    }
+
+    .chart-placeholder {
+      width: 100%;
+      height: 200px;
+      background: var(--gray-100);
+      border: 2px dashed var(--gray-300);
+      border-radius: 0.5rem;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      color: var(--gray-500);
+      font-size: 1rem;
+    }
+
+    @media (max-width: 640px) {
+      .container { padding: 1rem; }
+      h1 { font-size: 1.5rem; }
+      .grid { grid-template-columns: 1fr; }
+    }
+  </style>
+</svelte:head>
+
 <main class="container">
   <header>
     <h1>Dashboard</h1>
@@ -63,35 +207,34 @@
     </div>
   {:else}
     <section class="grid">
-      <Card
-        title="Revenue"
-        value={formatCurrency(stats.revenue)}
-        change="+12.5%"
-        positive={true}
-      />
-      <Card
-        title="Active Users"
-        value={formatNumber(stats.users)}
-        change="+5.2%"
-        positive={true}
-      />
-      <Card
-        title="Orders"
-        value={formatNumber(stats.orders)}
-        change="-2.4%"
-        positive={false}
-      />
-      <Card
-        title="Conversion"
-        value={`${stats.conversion}%`}
-        change="+0.3%"
-        positive={true}
-      />
+      <div class="card">
+        <h3 class="card-title">Revenue</h3>
+        <p class="card-value">{formatCurrency(stats.revenue)}</p>
+        <p class="card-change positive">+12.5%</p>
+      </div>
+
+      <div class="card">
+        <h3 class="card-title">Active Users</h3>
+        <p class="card-value">{formatNumber(stats.users)}</p>
+        <p class="card-change positive">+5.2%</p>
+      </div>
+
+      <div class="card">
+        <h3 class="card-title">Orders</h3>
+        <p class="card-value">{formatNumber(stats.orders)}</p>
+        <p class="card-change negative">-2.4%</p>
+      </div>
+
+      <div class="card">
+        <h3 class="card-title">Conversion</h3>
+        <p class="card-value">{stats.conversion}%</p>
+        <p class="card-change positive">+0.3%</p>
+      </div>
     </section>
 
     <section class="chart-section">
       <h2>Revenue Trend</h2>
-      <Chart />
+      <div class="chart-placeholder">Chart placeholder</div>
     </section>
   {/if}
 </main>