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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Arial,
        sans-serif;
      background-color: #f8fafc;
      color: #1e293b;
      line-height: 1.7;
      padding-bottom: 50px;
    }

    .container {
      max-width: 1100px;
      margin: 0 auto;
      padding: 0 16px;
    }

    /* HERO */
    .hero {
      background: #ffffff;
      border-radius: 16px;
      padding: 32px 24px;
      margin: 20px 0;
      border: 1px solid #e2e8f0;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    .hero h1 {
      font-size: 1.8rem;
      color: #0f172a;
      margin-bottom: 12px;
      line-height: 1.5;
    }

    .hero p {
      color: #64748b;
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    .btn-primary {
      background-color: #d97706;
      color: white;
      border: none;
      padding: 10px 20px;
      border-radius: 8px;
      font-weight: 600;
      cursor: pointer;
      text-decoration: none;
      display: inline-block;
    }

    /* SEO CONTENT */
    .seo-section {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 16px;
      padding: 24px;
      margin-bottom: 30px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    }

    .seo-section h2 {
      color: #0f172a;
      font-size: 1.35rem;
      margin-bottom: 10px;
      margin-top: 20px;
    }

    .seo-section h2:first-child {
      margin-top: 0;
    }

    .seo-section p {
      color: #475569;
      font-size: 0.92rem;
      margin-bottom: 14px;
    }

    /* STATS */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 16px;
      margin-bottom: 30px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 20px;
      text-align: center;
    }

    .stat-card .label {
      font-size: 0.85rem;
      color: #64748b;
      margin-bottom: 8px;
    }

    .stat-card .value {
      font-size: 1.6rem;
      font-weight: 700;
      color: #0f172a;
    }

    /* DATASET */
    .dataset-heading {
      color: #0f172a;
      font-size: 1.5rem;
      margin-bottom: 18px;
    }

    .dataset-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }

    /* CARD */
    .card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 16px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    }

    .card-top {
      display: flex;
      justify-content: center;
      margin-bottom: 16px;
    }

    .badge-box {
      background: #f1f5f9;
      border-radius: 8px;
      padding: 6px 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
    }

    .dot.verified {
      background-color: #16a34a;
    }

    .dot.review {
      background-color: #ea580c;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      text-align: center;
      color: #0f172a;
      margin-bottom: 8px;
    }

    .dataset-id {
      text-align: center;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      color: #64748b;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 6px;
      width: fit-content;
      margin: 0 auto 16px auto;
      letter-spacing: 0.5px;
    }

    .card-desc {
      font-size: 0.85rem;
      color: #64748b;
      margin-bottom: 16px;
      text-align: left;
    }

    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      justify-content: center;
      margin-bottom: 20px;
    }

    .tag {
      background: #f1f5f9;
      color: #475569;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 6px;
    }

    /* META */
    .meta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      background: #f8fafc;
      padding: 12px;
      border-radius: 12px;
      margin-bottom: 20px;
    }

    .meta-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 10px;
      text-align: center;
    }

    .meta-item .key {
      font-size: 0.7rem;
      color: #94a3b8;
      display: block;
      margin-bottom: 2px;
    }

    .meta-item .val {
      font-size: 0.85rem;
      font-weight: 600;
      color: #1e293b;
    }

    /* BUTTONS */
    .card-actions {
      display: flex;
      gap: 10px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn {
      padding: 8px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      text-decoration: none;
      display: inline-block;
      text-align: center;
    }

    .btn-dark {
      background: #064e3b;
      color: #ffffff;
    }

    .btn-kaggle {
      background: #20beff;
      color: #ffffff;
    }

    .btn-disabled {
      background: #f1f5f9;
      color: #94a3b8;
      cursor: not-allowed;
    }

    /* FOOTER */
    footer {
      max-width: 1100px;
      margin: 40px auto 0;
      padding: 24px 16px;
      text-align: center;
      color: #64748b;
      font-size: 0.85rem;
    }

    @media (max-width: 600px) {
      .hero { padding: 24px 18px; }
      .hero h1 { font-size: 1.45rem; }
      .dataset-grid { grid-template-columns: 1fr; }
      .meta-grid { grid-template-columns: 1fr 1fr; }
    }