:root{
  --bg:#f6f8f9; --paper:#ffffff; --ink:#14232b; --muted:#5c6b73;
  --line:#dce4e7; --brand:#0a6f78; --brand2:#0e4b57; --soft:#e7f4f4;
  --warn:#fff4d8; --danger:#fff0ef; --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.68}
a{color:var(--brand2);text-underline-offset:3px}
img,svg{max-width:100%}
.wrap{width:min(var(--max),calc(100% - 32px));margin:auto}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.navbar{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:-.02em}
.brand-mark{width:38px;height:38px}
.navlinks{display:flex;align-items:center;gap:18px;font-size:.94rem}
.navlinks a{text-decoration:none;color:var(--ink);font-weight:650}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 10px}
.notice{background:#0f3037;color:#eaf7f7;font-size:.88rem;padding:9px 0}
.notice a{color:white}
.hero{padding:70px 0 50px;background:linear-gradient(145deg,#e9f5f4 0%,#f9fbfb 62%,#f2f7f8 100%)}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center}
.eyebrow{display:inline-block;color:var(--brand);font-weight:800;text-transform:uppercase;letter-spacing:.08em;font-size:.78rem}
h1,h2,h3{line-height:1.16;letter-spacing:-.025em}
h1{font-size:clamp(2.25rem,5vw,4.6rem);margin:.3rem 0 1rem}
h2{font-size:clamp(1.55rem,3vw,2.25rem);margin-top:2.2rem}
h3{font-size:1.22rem;margin-top:1.6rem}
.lede{font-size:1.15rem;color:#42565e;max-width:760px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn{display:inline-block;text-decoration:none;border-radius:11px;padding:12px 17px;font-weight:800;border:1px solid var(--brand2)}
.btn-primary{background:var(--brand2);color:#fff}
.btn-secondary{background:#fff;color:var(--brand2)}
.hero-card,.card,.callout,.toc,.source-box,.product-box{background:var(--paper);border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 24px rgba(27,60,68,.05)}
.hero-card{padding:24px}
.section{padding:48px 0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{padding:22px}
.card h3{margin-top:0}
.card p{color:var(--muted)}
.article-shell{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:36px;align-items:start;padding:40px 0 70px}
.article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(24px,4vw,46px)}
.article h1{font-size:clamp(2rem,4vw,3.25rem)}
.article-meta{color:var(--muted);font-size:.9rem}
.article p,.article li{font-size:1.03rem}
.toc{padding:20px;position:sticky;top:96px}
.toc strong{display:block;margin-bottom:8px}
.toc a{display:block;text-decoration:none;padding:5px 0;font-size:.92rem}
.callout{padding:18px 20px;margin:24px 0}
.callout.caution{background:var(--warn)}
.callout.medical{background:var(--danger)}
.callout strong{display:block;margin-bottom:4px}
.product-box{padding:22px;margin:28px 0;border:2px solid #bcd9da}
.product-box .btn{margin-top:8px}
.source-box{padding:20px;margin-top:34px;background:#fbfcfc}
.source-box li{font-size:.93rem;margin-bottom:7px}
.breadcrumbs{font-size:.88rem;color:var(--muted);margin-bottom:18px}
.breadcrumbs a{color:var(--muted)}
.tag{display:inline-block;background:var(--soft);color:var(--brand2);border-radius:999px;padding:5px 10px;font-weight:750;font-size:.78rem;margin-right:7px}
table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.95rem}
th,td{border:1px solid var(--line);padding:11px;vertical-align:top;text-align:left}
th{background:#f1f6f7}
.site-footer{background:#102a31;color:#dcebed;padding:48px 0 28px}
.site-footer a{color:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}
.small{font-size:.88rem;color:var(--muted)}
.site-footer .small{color:#b9cdd1}
.kicker{font-weight:800;color:var(--brand2)}
hr{border:0;border-top:1px solid var(--line);margin:30px 0}
@media(max-width:850px){
 .hero-grid,.article-shell,.grid-3,.grid-2,.footer-grid{grid-template-columns:1fr}
 .toc{position:static;order:-1}
 .navlinks{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:18px 24px;flex-direction:column;align-items:flex-start}
 .navlinks.open{display:flex}
 .menu-btn{display:block}
 .site-header{position:relative}
}