:root{--ink:#1f2937;--muted:#5f6b7a;--border:#dfe4ea;--surface:#f7f9fb;--accent:#0b766e;--accent-dark:#075b55;--warn:#fff7e6;--warn-border:#e5b95d}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:white;line-height:1.62}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}header{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:5}.nav{max-width:1040px;margin:auto;padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:800;font-size:1.22rem;letter-spacing:-.02em;color:#15232f}.links{display:flex;gap:20px;flex-wrap:wrap;font-size:.95rem}main{max-width:900px;margin:auto;padding:56px 24px 72px}.hero{padding:72px 0 42px}.hero h1{font-size:clamp(2.2rem,6vw,4rem);line-height:1.05;margin:0 0 18px;letter-spacing:-.045em}.hero p{font-size:1.2rem;color:var(--muted);max-width:760px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-block;padding:11px 17px;border-radius:9px;border:1px solid var(--border);font-weight:700}.btn.primary{background:var(--accent);border-color:var(--accent);color:white}.btn.primary:hover{background:var(--accent-dark);text-decoration:none}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:30px 0}.card{border:1px solid var(--border);border-radius:14px;padding:22px;background:#fff}.card h3{margin-top:0}h1{font-size:2.4rem;line-height:1.12;letter-spacing:-.035em}h2{font-size:1.45rem;margin-top:2.2em;border-top:1px solid var(--border);padding-top:1.1em}h3{font-size:1.08rem;margin-top:1.8em}p,li{font-size:1rem}ul,ol{padding-left:1.4rem}.meta{color:var(--muted);margin-top:-8px;margin-bottom:32px}.notice{background:var(--warn);border:1px solid var(--warn-border);padding:14px 16px;border-radius:10px;margin:22px 0}.callout{background:var(--surface);border:1px solid var(--border);padding:18px;border-radius:12px}footer{border-top:1px solid var(--border);background:var(--surface)}.footer{max-width:1040px;margin:auto;padding:28px 24px;color:var(--muted);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.92rem}code{background:#f3f4f6;border-radius:5px;padding:2px 5px}@media(max-width:760px){.grid{grid-template-columns:1fr}.links{gap:12px}.nav{align-items:flex-start;flex-direction:column}.hero{padding-top:46px}}