:root{--bg:#ffffff;--fg:#16181d;--muted:#5d636e;--line:#e5e7eb;--accent:#2f6df6;--card:#f7f8fa}
@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--fg:#e8eaed;--muted:#9aa1ab;--line:#242832;--accent:#6f9bff;--card:#161a21}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 24px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;text-decoration:none;color:var(--fg)}
nav a{margin-left:18px;color:var(--muted);text-decoration:none;font-size:15px}
nav a:hover{color:var(--accent)}
main{max-width:960px;margin:0 auto;padding:0 24px 56px}
.hero{padding:56px 0 32px;max-width:640px}
.hero.narrow{padding-bottom:8px}
h1{font-size:38px;line-height:1.15;margin:0 0 14px;letter-spacing:-.02em}
.hero p{color:var(--muted);font-size:18px;margin:0 0 20px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:10px 18px;border-radius:8px;background:var(--accent);color:#fff;text-decoration:none;font-size:15px}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line)}
.cover{width:100%;height:auto;border:1px solid var(--line);border-radius:12px;margin:8px 0 40px;display:block}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:16px;margin-bottom:44px}
.grid article{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.grid h2{font-size:17px;margin:0 0 6px}
.grid p{margin:0;color:var(--muted);font-size:15px}
.note h2{font-size:20px;margin:28px 0 8px}
.note p{color:var(--muted);margin:0 0 12px}
code{background:var(--card);border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:14px}
footer{border-top:1px solid var(--line);padding:22px 24px;color:var(--muted);font-size:14px}
footer p{max-width:960px;margin:0 auto}