:root{
      --brand:#0ea5e9;      /* medical blue */
      --ink:#0b1220;        /* heading */
      --muted:#475569;      /* body */
      --bg:#ffffff;
      --card:#f6fafc;
      --line:#e6eef4;
      --accent:#6d28d9;     /* subtle violet accent */
    }
    *{box-sizing:border-box}
    html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif}
    a{color:var(--brand);text-decoration:none}
    a:hover{text-decoration:underline}
    .container{width:100%;max-width:1100px;margin:0 auto;padding:clamp(16px,3vw,28px)}
    .hero{
      position:relative;border-radius:20px;overflow:hidden;background:linear-gradient(180deg, #eaf6ff 0%, #ffffff 100%);
      box-shadow:0 10px 30px rgba(2, 132, 199, .12);
    }
    .hero-inner{display:grid;grid-template-columns:1fr;align-items:center}
    @media (min-width:900px){ .hero-inner{grid-template-columns:1.1fr .9fr} }
    .eyebrow{font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);font-size:.85rem}
    h1{font-size:clamp(26px,4vw,44px);line-height:1.15;margin:8px 0 12px}
    h2{font-size:clamp(22px,3vw,30px);margin:26px 0 14px}
    h3{font-size:clamp(18px,2.2vw,22px);margin:18px 0 10px}
    p{color:var(--muted);margin:10px 0}
    .lead{font-size:clamp(16px,2.2vw,18px);color:#0f172a}
    .hero-visual{position:relative;min-height:240px}
    .hero-visual img{width:100%;height:auto;display:block}
    .pill{display:inline-flex;gap:8px;align-items:center;padding:10px 14px;border-radius:999px;background:#e6f6ff;color:#065a82;font-weight:600}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
    .btn{display:inline-flex;align-items:center;gap:10px;padding:12px 18px;border-radius:14px;font-weight:700;border:1px solid transparent}
    .btn.primary{background:var(--brand);color:#fff}
    .btn.secondary{background:#fff;border-color:var(--line);color:#0b1220}
    .grid{display:grid;gap:16px}
    @media (min-width:900px){ .grid.cols-2{grid-template-columns:1fr 1fr} .grid.cols-3{grid-template-columns:repeat(3,1fr)} }
    .card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px}
    .kbd{font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;background:#eef6ff;border:1px solid #d8e8f7;border-radius:8px;padding:2px 8px}
    .toc{background:#ffffff;border:1px dashed var(--line);border-radius:14px;padding:14px}
    .toc a{display:block;padding:8px 8px;border-radius:8px}
    .toc a:hover{background:#f6fbff}
    .figure{border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#fff}
    .figure img{width:100%;height:auto;display:block}
    .figure .cap{padding:10px 12px;font-size:.92rem;color:var(--muted);background:#fff}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px;background:#fff}
    table{border-collapse:collapse;width:100%;min-width:640px}
    th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
    th{background:#f8fbff;color:#0b1220}
    .kbd-badge{display:inline-block;margin-left:6px;font-size:.75rem;color:#155e75;background:#e5f3f7;border-radius:6px;padding:2px 6px}
    .note{border-left:4px solid var(--accent);background:#fbf7ff;padding:12px 14px;border-radius:12px}
    .badges{display:flex;flex-wrap:wrap;gap:8px}
    .badge{padding:8px 10px;border-radius:999px;background:#eef2ff;color:#3730a3;font-weight:600;font-size:.85rem;border:1px solid #e5e7eb}
    .cta-banner{display:grid;gap:14px;align-items:center;background:linear-gradient(135deg, #0ea5e9 0%, #6d28d9 100%);color:#fff;border-radius:18px;padding:20px}
    @media (min-width:900px){ .cta-banner{grid-template-columns:1.2fr .8fr} }
    .footer-hint{font-size:.9rem;color:var(--muted)}
    /* smooth anchors */
    html{scroll-behavior:smooth}