:root{
  --bg:#f4f2ec; --surface:#fff; --surface-2:#faf9f5; --border:#e6e2d8;
  --text:#161b26; --muted:#666e7d;
  --accent:#2f54eb; --accent-soft:#e9edfd; --on-accent:#fff;
  --code-bg:#f7f5ef; --code-border:#eae5d9;
  --shadow:0 1px 2px rgba(22,27,38,.05), 0 3px 12px rgba(22,27,38,.05);
  --c-builtin:#3b82f6; --c-str:#0d9f6e; --c-seq:#8b5cf6; --c-mapset:#6366f1;
  --c-oop:#ec4899; --c-exc:#ef4444; --c-module:#e0850b; --c-iter:#06b6d4;
  --c-op:#64748b; --c-typing:#9173f0;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0d1220; --surface:#151c2c; --surface-2:#1a2234; --border:#273148;
    --text:#e7ebf3; --muted:#95a1b6;
    --accent:#6b8cff; --accent-soft:#1b2646; --on-accent:#0d1220;
    --code-bg:#0f1626; --code-border:#273148;
    --shadow:0 1px 2px rgba(0,0,0,.32), 0 3px 14px rgba(0,0,0,.36);
    --c-builtin:#60a5fa; --c-str:#34d399; --c-seq:#a78bfa; --c-mapset:#818cf8;
    --c-oop:#f472b6; --c-exc:#f87171; --c-module:#fbbf24; --c-iter:#22d3ee;
    --c-op:#94a3b8; --c-typing:#b39cf7;
  }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);line-height:1.6;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
code,pre{font-family:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace}
.top{max-width:820px;margin:0 auto;padding:18px 16px;display:flex;
  justify-content:space-between;align-items:center;gap:12px}
.brand{font-weight:700;color:var(--text);text-decoration:none}
.lang{color:var(--accent);text-decoration:none;font-size:14px}
.card{max-width:820px;margin:0 auto 40px;background:var(--surface);
  border:1px solid var(--border);border-top:4px solid var(--cg);border-radius:15px;
  box-shadow:var(--shadow);padding:22px 24px}
@media (max-width:600px){.card{margin:0 0 24px;border-radius:0;padding:18px 16px}}
h1{margin:8px 0 6px;font-size:26px;overflow-wrap:anywhere}
h2{margin:22px 0 8px;font-size:13px;text-transform:uppercase;letter-spacing:.06em;
  color:var(--muted)}
.badges{margin:0;display:flex;flex-wrap:wrap;gap:6px}
.badges span{font-size:12px;padding:2px 9px;border-radius:999px;
  background:var(--surface-2);border:1px solid var(--border);color:var(--muted)}
.subcat{margin:0;color:var(--muted);font-size:14px}
.summary{font-size:17px}
pre{background:var(--code-bg);border:1px solid var(--code-border);border-radius:10px;
  padding:12px 14px;overflow-x:auto;font-size:14px;line-height:1.5}
.related{display:flex;flex-wrap:wrap;gap:8px}
.related a,.actions a{font-size:14px;padding:6px 12px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);text-decoration:none}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.actions a.primary{background:var(--accent);color:var(--on-accent)}
a:hover{text-decoration:underline}