:root{
  --bg:#f7fbff; --bg2:#eef7ff; --surface:#ffffff; --ink:#0f172a; --muted:#526179; --line:#dbe7f3;
  --primary:#2563eb; --primary-dark:#1e40af; --accent:#14b8a6; --accent2:#8b5cf6; --danger:#b91c1c;
  --shadow:0 24px 70px rgba(15,23,42,.11); --shadow-soft:0 14px 36px rgba(37,99,235,.10);
  --radius:28px; --radius-sm:18px; --container:1180px;
}
*{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;color:var(--ink);background:linear-gradient(180deg,var(--bg),#fff 42%);line-height:1.65} body:before{content:"";position:fixed;inset:-20%;z-index:-1;background:radial-gradient(circle at 20% 10%,rgba(37,99,235,.12),transparent 30%),radial-gradient(circle at 82% 15%,rgba(20,184,166,.14),transparent 28%),radial-gradient(circle at 45% 90%,rgba(139,92,246,.08),transparent 34%)}
a{color:var(--primary);text-decoration:none} a:hover{text-decoration:underline}.container{width:min(var(--container),calc(100% - 36px));margin-inline:auto}.skip-link{position:absolute;left:-999px;top:0;background:#fff;padding:12px 16px;z-index:20}.skip-link:focus{left:16px;top:16px}.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border-bottom:1px solid rgba(219,231,243,.85)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:76px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:850;letter-spacing:-.03em;color:var(--ink);font-size:1.14rem}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:var(--shadow-soft)}.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end}.main-nav a{color:#27364d;font-weight:700;font-size:.92rem;padding:9px 11px;border-radius:999px}.main-nav a:hover,.main-nav a.active{background:#edf5ff;text-decoration:none;color:var(--primary-dark)}.nav-toggle{display:none;border:0;background:#f1f5fb;border-radius:14px;padding:10px;gap:4px;flex-direction:column}.nav-toggle span{display:block;width:23px;height:2px;background:var(--ink);border-radius:99px}.hero,.page-hero{padding:82px 0 64px;position:relative;overflow:hidden}.page-hero{background:linear-gradient(135deg,rgba(37,99,235,.08),rgba(20,184,166,.08));border-bottom:1px solid var(--line)}.page-hero.compact{padding:50px 0}.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.8fr);gap:44px;align-items:center}.hero h1,.page-hero h1{font-size:clamp(2.35rem,6vw,5.1rem);line-height:.96;letter-spacing:-.075em;margin:0 0 22px}.page-hero h1{font-size:clamp(2.15rem,5vw,4.25rem)}.hero-lede,.page-hero p{font-size:1.18rem;color:var(--muted);max-width:780px}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 14px;font-weight:850;letter-spacing:.1em;text-transform:uppercase;color:var(--primary);font-size:.78rem}.eyebrow:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 7px rgba(20,184,166,.12)}.hero-actions,.form-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:13px 18px;font-weight:850;cursor:pointer;transition:.22s ease;font-size:.98rem}.button:hover{text-decoration:none;transform:translateY(-1px)}.button.primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 14px 26px rgba(37,99,235,.24)}.button.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}.glass-card,.calculator-card,.tool-card,.guide-card,.toc-card{background:rgba(255,255,255,.92);border:1px solid rgba(219,231,243,.92);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-panel{min-height:420px;display:grid;place-items:center}.result-preview{width:100%;padding:30px;position:relative;overflow:hidden}.result-preview:after{content:"";position:absolute;right:-70px;bottom:-70px;width:210px;height:210px;border-radius:50%;background:linear-gradient(135deg,rgba(37,99,235,.20),rgba(20,184,166,.18))}.badge{display:inline-flex;padding:7px 11px;border-radius:999px;background:#e9f7ff;color:#075985;font-weight:850;font-size:.82rem}.check-list{padding:0;margin:20px 0 0;list-style:none}.check-list li{padding:10px 0 10px 34px;position:relative}.check-list li:before{content:"✓";position:absolute;left:0;top:10px;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#dcfce7;color:#15803d;font-weight:900}.section{padding:74px 0}.soft-section{background:linear-gradient(180deg,#f6fbff,#fff);border-block:1px solid var(--line)}.section-heading{max-width:760px;margin:0 auto 32px;text-align:center}.section-heading h2,.split h2,.prose h2{font-size:clamp(1.65rem,3.2vw,2.65rem);line-height:1.08;letter-spacing:-.045em;margin:0 0 14px}.section-heading p,.split p{color:var(--muted)}.split{display:grid;grid-template-columns:.8fr 1.2fr;gap:42px;align-items:start}.card-grid,.guide-grid{display:grid;gap:18px}.card-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.tool-card,.guide-card{padding:24px;color:var(--ink);min-height:210px;transition:.22s ease}.tool-card:hover,.guide-card:hover{transform:translateY(-4px);text-decoration:none;box-shadow:0 30px 72px rgba(15,23,42,.14)}.tool-card span,.guide-card span,.related-list span{display:inline-flex;margin-bottom:12px;color:var(--primary);font-weight:900;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase}.tool-card h3,.guide-card h3{margin:0 0 8px;font-size:1.25rem;line-height:1.2}.tool-card p,.guide-card p{margin:0;color:var(--muted)}.guide-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:34px;align-items:start}.main-content{min-width:0}.prose{font-size:1.04rem}.prose.narrow{max-width:850px}.prose p,.prose li{color:#344155}.prose h2{margin-top:24px}.prose h3{font-size:1.28rem;margin:25px 0 8px}.medical,.notice{border:1px solid #bfdbfe;background:#eff6ff;color:#1e3a8a;border-radius:18px;padding:16px 18px;margin:22px 0}.medical strong{color:#1e40af}.calculator-card{padding:24px}.sticky-card{position:sticky;top:98px}.calculator-card h2{margin:0 0 16px;letter-spacing:-.03em;line-height:1.1}.calc-form{display:grid;gap:14px}.calc-form label{display:grid;gap:7px;font-weight:800;color:#26364d;font-size:.92rem}.calc-form input,.calc-form select,.calc-form textarea{width:100%;border:1px solid #cfddeb;background:#fff;border-radius:15px;padding:13px 13px;font:inherit;color:var(--ink);outline:none}.calc-form input:focus,.calc-form select:focus,.calc-form textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}.field-row{display:grid;grid-template-columns:1fr 120px;gap:12px}.form-error{min-height:1.4em;color:var(--danger);font-weight:750;margin:0}.result-box{margin-top:20px;border-radius:22px;background:linear-gradient(135deg,#eff6ff,#ecfeff);border:1px solid #bfdbfe;padding:18px}.result-box[hidden]{display:none}.result-topline{font-size:.84rem;font-weight:900;color:var(--primary);letter-spacing:.08em;text-transform:uppercase}.result-main{font-size:2.25rem;line-height:1.1;font-weight:900;letter-spacing:-.06em;margin:6px 0;color:var(--ink)}.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}.result-stat{background:#fff;border:1px solid #dbeafe;border-radius:16px;padding:13px}.result-stat strong{display:block;font-size:1.18rem}.result-stat span{display:block;color:var(--muted);font-size:.85rem}.result-note{margin:12px 0 0;font-size:.9rem;color:#334155}.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}.info-grid div{border:1px solid var(--line);border-radius:18px;background:#fff;padding:15px}.info-grid strong{display:block}.info-grid span{color:var(--muted);font-size:.92rem}.formula-box{background:#0f172a;color:#e2e8f0;border-radius:18px;padding:18px;margin:18px 0;overflow:auto}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff;margin:20px 0}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:0}th{background:#f8fbff}.related-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}.related-list a{display:block;border:1px solid var(--line);background:#fff;border-radius:18px;padding:16px;color:var(--ink);transition:.2s}.related-list a:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-soft)}.related-list strong{display:block;line-height:1.2}.related-list small{display:block;color:var(--muted);margin-top:5px}.faq-list{display:grid;gap:10px;margin:20px 0}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 16px}.faq-list summary{font-weight:850;cursor:pointer;padding:16px 0}.faq-list p{margin:0 0 16px}.breadcrumb{font-size:.92rem;color:var(--muted);margin-bottom:18px}.breadcrumb a{font-weight:800}.breadcrumb span{margin:0 8px;color:#94a3b8}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:34px;align-items:start}.article-body{max-width:820px}.toc-card{padding:22px;position:sticky;top:98px}.toc-card .related-list{grid-template-columns:1fr}.site-footer{background:#0f172a;color:#cbd5e1;padding:54px 0 28px;margin-top:40px}.footer-grid{display:grid;grid-template-columns:340px minmax(0,1fr);gap:32px}.footer-brand{color:#fff}.site-footer p{color:#94a3b8}.footer-links{display:flex;flex-wrap:wrap;gap:8px 14px;align-content:start}.footer-links a{color:#dbeafe;font-weight:700}.micro,.copyright{font-size:.88rem}.copyright{margin-top:28px;color:#94a3b8;border-top:1px solid rgba(148,163,184,.2);padding-top:20px}.reveal{opacity:0;transform:translateY(16px);transition:.55s ease}.reveal.in{opacity:1;transform:none}
@media (max-width:960px){.main-nav{position:absolute;top:76px;left:18px;right:18px;display:none;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}.main-nav.open{display:flex}.nav-toggle{display:flex}.hero-grid,.content-grid,.article-layout,.split,.footer-grid{grid-template-columns:1fr}.sticky-card,.toc-card{position:static}.card-grid.three,.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero,.page-hero{padding:50px 0}.hero-panel{min-height:auto}.related-list{grid-template-columns:1fr}}
@media (max-width:620px){.container{width:min(100% - 28px,var(--container))}.hero h1,.page-hero h1{letter-spacing:-.055em}.card-grid.three,.guide-grid,.info-grid,.result-grid{grid-template-columns:1fr}.field-row{grid-template-columns:1fr}.section{padding:52px 0}.button{width:100%}.hero-actions .button{width:auto}.calculator-card,.tool-card,.guide-card{border-radius:22px;padding:20px}.footer-links{display:grid;grid-template-columns:1fr 1fr}}