:root {
        color-scheme: light;
        font-family: Arial, Helvetica, sans-serif;
      }

      body {
        margin: 0;
        background: linear-gradient(135deg, #f4f7fb, #e8f0ff);
        color: #1f2937;
      }

      .container {
        max-width: 900px;
        margin: 0 auto;
        padding: 40px 20px 60px;
      }

      header {
        text-align: center;
        margin-bottom: 30px;
      }

      h1 {
        margin-bottom: 10px;
        font-size: 2rem;
      }

      .subtitle {
        margin: 0;
        color: #4b5563;
        font-size: 1rem;
      }

      .grid {
        display: grid;
        gap: 16px;
      }

      .card {
        background: white;
        border-radius: 14px;
        padding: 20px;
        box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
      }

      .card h2 {
        margin-top: 0;
        font-size: 1.2rem;
      }

      .card p {
        color: #4b5563;
        line-height: 1.5;
      }

      .btn {
        display: inline-block;
        margin-top: 10px;
        padding: 10px 16px;
        background: #2563eb;
        color: white;
        text-decoration: none;
        border-radius: 8px;
        font-weight: 600;
      }

      .btn:hover {
        background: #1d4ed8;
      }

      footer {
        text-align: center;
        margin-top: 24px;
        color: #6b7280;
        font-size: 0.9rem;
      }