:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --accent: #0ea5e9;
      --bg: #f5f5f7;
      --text: #111827;
      --muted: #6b7280;
      --card-bg: #ffffff;
      --border-radius: 16px;
      --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
    }

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

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.6;
    }

    .page-wrapper {
      max-width: 1100px;
      margin: 0 auto;
      padding: 24px 16px 40px;
    }

    header {
      text-align: center;
      margin-bottom: 32px;
    }

    header h1 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    header p {
      max-width: 680px;
      margin: 0 auto;
      color: var(--muted);
      font-size: 0.98rem;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 4px 12px;
      border-radius: 999px;
      background: rgba(37, 99, 235, 0.06);
      color: var(--primary-dark);
      font-size: 0.78rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-bottom: 12px;
    }

    .badge span {
      width: 6px;
      height: 6px;
      border-radius: 999px;
      background: var(--accent);
    }

    main {
      display: grid;
      grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
      gap: 24px;
    }

    .intro-card,
    .faq-card,
    .cta-card {
      background: var(--card-bg);
      border-radius: var(--border-radius);
      padding: 20px 20px 22px;
      box-shadow: var(--shadow-soft);
    }

    .intro-card h2 {
      font-size: 1.3rem;
      margin-bottom: 10px;
    }

    .intro-card p {
      font-size: 0.95rem;
      color: var(--muted);
      margin-bottom: 10px;
    }

    .keyword-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 10px;
    }

    .keyword-tags span {
      font-size: 0.75rem;
      background: #eff6ff;
      color: #1d4ed8;
      padding: 4px 8px;
      border-radius: 999px;
      white-space: nowrap;
    }

    .faq-card h2 {
      font-size: 1.2rem;
      margin-bottom: 12px;
    }

    details {
      border-radius: 12px;
      border: 1px solid #e5e7eb;
      padding: 10px 12px;
      margin-bottom: 10px;
      background: #ffffff;
      transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
    }

    details[open] {
      box-shadow: 0 12px 26px rgba(15, 23, 42, 0.12);
      border-color: #bfdbfe;
      transform: translateY(-1px);
    }

    summary {
      list-style: none;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.98rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    .summary-label {
      flex: 1;
    }

    .summary-icon {
      flex-shrink: 0;
      font-size: 1.1rem;
      color: var(--primary-dark);
    }

    details p {
      margin-top: 8px;
      font-size: 0.9rem;
      color: #374151;
    }

    .faq-note {
      margin-top: 8px;
      font-size: 0.8rem;
      color: var(--muted);
    }

    .cta-card {
      position: sticky;
      top: 16px;
      align-self: flex-start;
      border-top: 3px solid var(--primary);
    }

    .cta-card h3 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }

    .cta-card p {
      font-size: 0.9rem;
      color: var(--muted);
      margin-bottom: 12px;
    }

    .cta-highlight {
      font-size: 0.86rem;
      background: rgba(14, 165, 233, 0.08);
      padding: 8px 10px;
      border-radius: 10px;
      margin-bottom: 12px;
    }

    .cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 10px 16px;
      border-radius: 999px;
      border: none;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #ffffff;
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      text-decoration: none;
      box-shadow: 0 12px 25px rgba(37, 99, 235, 0.35);
      transition: transform 0.12s ease, box-shadow 0.12s ease;
      margin-bottom: 8px;
    }

    .cta-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 16px 30px rgba(37, 99, 235, 0.45);
    }

    .cta-btn span {
      font-size: 1rem;
    }

    .cta-mini {
      font-size: 0.8rem;
      color: var(--muted);
    }

    footer {
      margin-top: 26px;
      text-align: center;
      font-size: 0.78rem;
      color: var(--muted);
    }

    /* Responsive (tablette & mobile) */
    @media (max-width: 900px) {
      main {
        grid-template-columns: minmax(0, 1fr);
      }

      .cta-card {
        position: static;
      }

      header h1 {
        font-size: 1.6rem;
      }
    }

    @media (max-width: 600px) {
      .page-wrapper {
        padding: 18px 12px 28px;
      }

      .intro-card,
      .faq-card,
      .cta-card {
        padding: 16px 14px 18px;
      }

      header h1 {
        font-size: 1.4rem;
      }
    }