:root{--bg:#f6f7f9;--card:#fff;--text:#14171c;--muted:#5b6472;--border:#dfe3e8;--accent:#c8102e}
@media (prefers-color-scheme:dark){:root{--bg:#101215;--card:#181b20;--text:#eef0f3;--muted:#a3abb7;--border:#2c313a;--accent:#ff4d5e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
header,main,footer{max-width:860px;margin:0 auto;padding:0 16px}
header{display:flex;align-items:center;gap:12px;padding-top:28px}
header img{width:44px;height:44px}
header a{color:inherit;text-decoration:none;font-weight:700;font-size:18px}
nav{margin-left:auto;display:flex;gap:16px;font-size:14px}
nav a{font-weight:500;color:var(--muted)}
h1{font-size:32px;line-height:1.2;margin:32px 0 8px}
h2{font-size:21px;margin:32px 0 8px}
h3{font-size:17px;margin:20px 0 6px}
.lead{font-size:19px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin:16px 0}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px}
.card h3{margin-top:0}
code,kbd{background:var(--card);border:1px solid var(--border);border-radius:6px;padding:1px 6px;font-size:14px}
a{color:var(--accent)}
.note{border-left:3px solid var(--accent);padding:4px 12px;color:var(--muted)}
.todo{color:var(--accent)}
table{border-collapse:collapse;width:100%;font-size:15px}
td,th{border-bottom:1px solid var(--border);padding:8px;text-align:left;vertical-align:top}
footer{color:var(--muted);font-size:14px;padding-top:40px;padding-bottom:40px}
main{overflow-wrap:break-word}
@media (max-width:640px){
  header{flex-wrap:wrap}
  nav{margin-left:0;width:100%}
  h1{font-size:26px}
  table{display:block;overflow-x:auto}
}