:root{
  --bg:#f7f6f2; --ink:#16181d; --muted:#5b616e; --line:#e3e1da; --card:#ffffff;
  --accent:#1f4fd6; --moat:#0f2a4a; --cold:#1b1f24; --steady:#2e6050;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 "Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--accent)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line);background:var(--bg)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;letter-spacing:.02em;text-decoration:none;color:var(--ink);font-size:18px}
.brand span{color:var(--accent)}
nav a{color:var(--muted);text-decoration:none;margin-left:20px;font-size:15px}
nav a:hover{color:var(--ink)}
.hero{padding:72px 0 40px}
.hero h1{font-size:clamp(32px,6vw,52px);line-height:1.1;margin:0 0 16px;letter-spacing:-.02em}
.hero p{font-size:18px;color:var(--muted);max-width:640px;margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;padding:24px 0 56px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;flex-direction:column}
.card .tag{display:inline-block;width:36px;height:6px;border-radius:3px;margin-bottom:14px}
.card h3{margin:0 0 6px;font-size:19px}
.card p{margin:0 0 16px;color:var(--muted);font-size:15px;flex:1}
.card a.btn{align-self:flex-start;text-decoration:none;font-weight:600;font-size:14px;border:1px solid var(--line);padding:8px 14px;border-radius:999px;color:var(--ink)}
.card a.btn:hover{border-color:var(--ink)}
section.about{border-top:1px solid var(--line);padding:40px 0 56px}
section.about h2{font-size:22px;margin:0 0 10px}
section.about p{color:var(--muted);max-width:720px}
.doc{padding:48px 0 64px;max-width:760px}
.doc h1{font-size:34px;margin:0 0 6px;letter-spacing:-.01em}
.doc .meta{color:var(--muted);margin:0 0 28px;font-size:14px}
.doc h2{font-size:20px;margin:32px 0 8px}
.doc p,.doc li{color:#2b2f37}
.doc ul{padding-left:20px}
footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
footer a{color:var(--muted)}
@media (max-width:520px){nav a{margin-left:12px;font-size:14px}.hero{padding:48px 0 24px}}