:root{--bg:#f7f8f4;--ink:#1b2927;--muted:#5f6b64;--line:#e2e6dc;--accent:#a39954;--surface:#fff;color-scheme:light dark;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
@media (prefers-color-scheme:dark){:root{--bg:#141b1a;--ink:#e8ece6;--muted:#a3ada6;--line:#2a3533;--surface:#1b2422}}
*{box-sizing:border-box}body{margin:0;background:var(--bg)}
header{max-width:760px;margin:auto;padding:24px 16px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line)}
.brand{font-size:26px;font-weight:750;letter-spacing:-1.2px;color:var(--ink);text-decoration:none}.brand span{color:var(--accent)}
nav{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap;font-size:13px}nav a{color:var(--muted)}
main{max-width:760px;margin:auto;padding:28px 16px 64px;line-height:1.65;font-size:16px}
h1{font-size:clamp(28px,6vw,40px);letter-spacing:-1.2px;line-height:1.15;margin:8px 0 6px}
h2{font-size:19px;letter-spacing:-.3px;margin:34px 0 8px}
p,li{color:var(--ink)}.muted{color:var(--muted);font-size:14px}ul{padding-left:20px}li{margin:6px 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px 20px;margin:20px 0}
.steps li{margin:10px 0}
mark{background:#f3e7a6;color:#1b2927;padding:0 4px;border-radius:4px}
a{color:inherit}footer{max-width:760px;margin:auto;padding:24px 16px;font-size:12px;color:var(--muted);border-top:1px solid var(--line)}
.card h2.first{margin-top:0}