:root{--bg:#f6f7f6;--panel:#fff;--fg:#1b2220;--muted:#5d6a66;--line:#d9dedb;--accent:#0b6b63;--code:#eef1ef}
@media (prefers-color-scheme:dark){:root{--bg:#101413;--panel:#151a19;--fg:#e6ebe9;--muted:#8c9a96;--line:#242b29;--accent:#4fb3a6;--code:#1a201f}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
font:15px/1.65 "IBM Plex Sans","Helvetica Neue",Arial,sans-serif}
code,kbd,.mono,pre{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Consolas,monospace}
a{color:var(--accent)}
.top{border-bottom:1px solid var(--line);background:var(--panel)}
.top .in{max-width:62rem;margin:0 auto;padding:.85rem 1.4rem;display:flex;justify-content:space-between;align-items:baseline;gap:1rem}
.brand{text-decoration:none;color:var(--fg);font-weight:600;font-size:1.05rem;letter-spacing:.01em}
.brand b{color:var(--accent);font-weight:600}
.top .meta{color:var(--muted);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase}
.page{max-width:62rem;margin:0 auto;padding:2.4rem 1.4rem 0;display:grid;grid-template-columns:12rem 1fr;gap:2.6rem}
nav{border-right:1px solid var(--line);padding-right:1.2rem}
nav a{display:block;text-decoration:none;color:var(--muted);padding:.3rem 0;font-size:.9rem}
nav a:hover,nav a.on{color:var(--fg)}
nav a.on{font-weight:600;box-shadow:inset 2px 0 0 var(--accent);padding-left:.6rem}
nav .grp{color:var(--muted);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;margin:1.6rem 0 .5rem}
main{min-width:0;padding-bottom:3rem}
h1{font-size:1.7rem;font-weight:600;letter-spacing:-.01em;margin:0 0 .8rem;line-height:1.25}
h2{font-size:1.02rem;font-weight:600;margin:2.4rem 0 .7rem;padding-bottom:.3rem;border-bottom:1px solid var(--line)}
h3{font-size:.92rem;font-weight:600;margin:1.6rem 0 .3rem}
p{margin:0 0 .9rem;max-width:40rem}
.lead{color:var(--muted);font-size:1.02rem}
ul{margin:0 0 1rem;padding-left:1.1rem;max-width:40rem}
li{margin-bottom:.35rem}
table{border-collapse:collapse;width:100%;max-width:40rem;font-size:.88rem;margin:.4rem 0 1.2rem}
th,td{text-align:left;padding:.42rem .6rem;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase}
td.n{text-align:right;font-family:"IBM Plex Mono",ui-monospace,monospace;white-space:nowrap}
pre{background:var(--code);border:1px solid var(--line);padding:.8rem .9rem;overflow-x:auto;
font-size:.82rem;line-height:1.5;margin:.4rem 0 1.2rem;max-width:40rem}
.facts{display:flex;flex-wrap:wrap;gap:2.2rem;margin:1.6rem 0 0;padding:1.1rem 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.facts div b{display:block;font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:1.5rem;font-weight:500;letter-spacing:-.02em}
.facts div span{color:var(--muted);font-size:.78rem}
.note{border-left:2px solid var(--accent);padding:.1rem 0 .1rem .8rem;color:var(--muted);font-size:.9rem;margin:1.2rem 0}
footer{border-top:1px solid var(--line);margin-top:1rem;background:var(--panel)}
footer .in{max-width:62rem;margin:0 auto;padding:1.4rem;color:var(--muted);font-size:.82rem;
display:flex;justify-content:space-between;flex-wrap:wrap;gap:.6rem}
@media (max-width:52rem){
.page{grid-template-columns:1fr;gap:1.4rem;padding-top:1.4rem}
nav{border-right:0;border-bottom:1px solid var(--line);padding:0 0 .9rem;display:flex;flex-wrap:wrap;gap:1rem}
nav a{padding:0;font-size:.86rem}
nav a.on{box-shadow:none;padding-left:0;color:var(--accent)}
nav .grp{display:none}
}