:root{--bg:#fbfaf7;--fg:#1d1d1f;--muted:#5f6368;--accent:#0b3d91;--line:#e3e1dc;--card:#ffffff;--warn:#7a4b00;--warnbg:#fff6e0}
@media (prefers-color-scheme:dark){:root{--bg:#121316;--fg:#ececec;--muted:#a3a7ad;--accent:#8ab4ff;--line:#2c2f35;--card:#1a1c20;--warn:#ffd27a;--warnbg:#2b2416}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 Georgia,"Times New Roman",serif}
header{border-bottom:1px solid var(--line);background:var(--card)}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
.top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding:14px 0}
.brand{font:700 16px/1.2 system-ui,sans-serif;color:var(--fg);text-decoration:none}
nav a{font:500 15px system-ui,sans-serif;color:var(--muted);text-decoration:none;margin-left:16px}
nav a:first-child{margin-left:0}
nav a[aria-current]{color:var(--accent)}
main{padding:28px 0 48px}
h1{font-size:32px;line-height:1.2;margin:0 0 8px}
h2{font-size:23px;margin:36px 0 10px;padding-top:8px;border-top:1px solid var(--line)}
h3{font-size:18px;margin:24px 0 6px}
.byline{font:14px system-ui,sans-serif;color:var(--muted);margin-bottom:24px}
.lead{font-size:19px}
a{color:var(--accent)}
.note{background:var(--warnbg);color:var(--warn);border-radius:6px;padding:12px 14px;font:15px/1.5 system-ui,sans-serif;margin:20px 0}
.tbl{overflow-x:auto;margin:14px 0}
table{border-collapse:collapse;width:100%;font:15px/1.45 system-ui,sans-serif;background:var(--card)}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--bg)}
li{margin:6px 0}
blockquote{margin:12px 0;padding:4px 14px;border-left:3px solid var(--accent);color:var(--muted)}
footer{border-top:1px solid var(--line);font:13px/1.5 system-ui,sans-serif;color:var(--muted);padding:20px 0 40px}
.src{font:14px/1.5 system-ui,sans-serif}