:root{--ink:#1d2026;--muted:#5d6472;--line:#e2e5ea;--bg:#fbfbfc;--accent:#5c3f7a}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.65 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent)}
.bar{display:flex;align-items:center;justify-content:space-between;
  gap:24px;padding:16px 24px;border-bottom:1px solid var(--line);background:#fff}
.bar .mark{font-weight:600;letter-spacing:.2px}
.bar .mark a{color:inherit;text-decoration:none}
.bar nav a{margin-left:18px;color:var(--muted);text-decoration:none;font-size:14px}
.bar nav a:hover{color:var(--accent)}
.wrap{max-width:760px;margin:0 auto;padding:40px 24px 64px}
h1{font-size:28px;line-height:1.25;margin:0 0 16px}
h2{font-size:18px;margin:32px 0 10px}
.lead{color:var(--muted);font-size:17px}
.grid{display:grid;grid-template-columns:200px 1fr;gap:8px 20px;margin:0}
.grid dt{color:var(--muted)}
.grid dd{margin:0}
pre{background:#fff;border:1px solid var(--line);border-radius:6px;
  padding:12px 14px;overflow-x:auto;font-size:14px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:500}
.foot{border-top:1px solid var(--line);padding:20px 24px;color:var(--muted);font-size:14px}
.foot a{color:var(--muted)}
@media(max-width:560px){.grid{grid-template-columns:1fr}}