*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7}a{color:var(--accent);text-underline-offset:3px}header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100% - 1120px)/2));border-bottom:1px solid color-mix(in srgb,var(--ink) 12%,transparent);position:sticky;top:0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(16px);z-index:5}.brand{text-decoration:none;color:var(--ink);font-size:19px;font-weight:800;letter-spacing:-.02em}.brand b{color:var(--accent)}header nav{display:flex;gap:24px}header nav a{text-decoration:none;color:var(--muted);font-weight:650}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:var(--card);padding:10px;z-index:10}main{max-width:1120px;margin:auto;padding:36px 24px 80px}.crumbs{display:flex;gap:9px;flex-wrap:wrap;color:var(--muted);font-size:14px;margin-bottom:28px}.crumbs a{color:var(--muted)}article{max-width:780px;margin:auto}h1{font-size:clamp(2.35rem,6vw,4.6rem);line-height:1.02;letter-spacing:-.045em;margin:10px 0 20px}h2{font-size:1.55rem;line-height:1.25;letter-spacing:-.02em;margin:46px 0 14px}.dek{font-size:1.24rem;color:var(--muted);line-height:1.55}.byline{font-size:14px;color:var(--muted);border-bottom:1px solid color-mix(in srgb,var(--ink) 12%,transparent);padding-bottom:22px}.eyebrow{color:var(--accent);font-size:12px;font-weight:850;letter-spacing:.16em}.notice,aside{background:var(--card);border:1px solid color-mix(in srgb,var(--ink) 12%,transparent);border-left:4px solid var(--accent);padding:20px 22px;border-radius:14px;margin:30px 0}.notice p{margin:.35rem 0 0}li{margin:.65rem 0}details{background:var(--card);border:1px solid color-mix(in srgb,var(--ink) 12%,transparent);border-radius:12px;padding:15px 18px;margin:12px 0}summary{font-weight:750;cursor:pointer}.sources{font-size:.95rem;color:var(--muted)}.guide-hero{max-width:820px;margin:30px auto 48px;text-align:center}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.guide-card{display:block;background:var(--card);border:1px solid color-mix(in srgb,var(--ink) 12%,transparent);border-radius:18px;padding:24px;text-decoration:none;color:var(--ink);transition:.2s}.guide-card:hover{transform:translateY(-3px);border-color:var(--accent)}.guide-card h2{font-size:1.25rem;margin:0 0 8px}.guide-card p{color:var(--muted);margin:0}footer{border-top:1px solid color-mix(in srgb,var(--ink) 12%,transparent);padding:38px 24px;text-align:center;color:var(--muted);font-size:14px}footer div{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}footer a{color:var(--muted)}footer p{max-width:760px;margin:16px auto}.dark .guide-card,.dark .notice,.dark details,.dark aside{box-shadow:0 12px 40px #0004}@media(max-width:700px){header{height:auto;padding:18px 20px;align-items:flex-start;gap:18px}header nav{gap:12px;flex-wrap:wrap;justify-content:flex-end}main{padding-top:26px}.guide-grid{grid-template-columns:1fr}h1{font-size:2.55rem}}