:root {
      --green: #22c55e;
      --green-dark: #16a34a;
      --red: #ef4444;
      --gray-50: #f9fafb;
      --gray-100: #f3f4f6;
      --gray-200: #e5e7eb;
      --gray-600: #4b5563;
      --gray-800: #1f2937;
      --gray-900: #111827;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: var(--gray-50);
      color: var(--gray-800);
      line-height: 1.6;
      min-height: 100vh;
    }

    .container {
      max-width: 800px;
      margin: 0 auto;
      padding: 2rem 1rem;
    }

    header {
      text-align: center;
      margin-bottom: 2rem;
    }

    header h1 {
      font-size: 1.5rem;
      color: var(--gray-900);
      margin-bottom: 0.5rem;
    }

    header p {
      color: var(--gray-600);
      font-size: 0.9rem;
    }

    .card {
      background: white;
      border-radius: 12px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
      padding: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.5rem 1rem;
      border-radius: 9999px;
      font-weight: 600;
      font-size: 0.9rem;
    }

    .status-badge.valid {
      background: #dcfce7;
      color: var(--green-dark);
    }

    .status-badge.invalid {
      background: #fee2e2;
      color: #dc2626;
    }

    .info-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1rem;
      margin-top: 1rem;
    }

    .info-item {
      padding: 0.75rem;
      background: var(--gray-50);
      border-radius: 8px;
    }

    .info-item label {
      display: block;
      font-size: 0.75rem;
      color: var(--gray-600);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 0.25rem;
    }

    .info-item .value {
      font-weight: 500;
      word-break: break-all;
    }

    .crypto-section {
      margin-top: 1.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid var(--gray-200);
    }

    .crypto-section h3 {
      font-size: 0.9rem;
      color: var(--gray-600);
      margin-bottom: 1rem;
    }

    .hash-display {
      font-family: 'SF Mono', Monaco, monospace;
      font-size: 0.75rem;
      background: var(--gray-100);
      padding: 0.75rem;
      border-radius: 6px;
      word-break: break-all;
      color: var(--gray-600);
    }

    .documents-list {
      list-style: none;
    }

    .documents-list li {
      padding: 0.5rem 0;
      border-bottom: 1px solid var(--gray-100);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .documents-list li:last-child {
      border-bottom: none;
    }

    .doc-type {
      font-size: 0.75rem;
      background: var(--gray-200);
      padding: 0.125rem 0.5rem;
      border-radius: 4px;
    }

    .error-page {
      text-align: center;
      padding: 3rem 1rem;
    }

    .error-page h2 {
      color: var(--red);
      margin-bottom: 1rem;
    }

    footer {
      text-align: center;
      padding: 2rem;
      color: var(--gray-600);
      font-size: 0.8rem;
    }

    .home-input {
      display: flex;
      gap: 0.5rem;
      margin-top: 1rem;
    }

    .home-input input {
      flex: 1;
      padding: 0.75rem 1rem;
      border: 1px solid var(--gray-200);
      border-radius: 8px;
      font-size: 1rem;
    }

    .home-input button {
      padding: 0.75rem 1.5rem;
      background: var(--green);
      color: white;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      font-weight: 600;
    }

    .home-input button:hover {
      background: var(--green-dark);
    }