:root { --ink:#171717; --muted:#686868; --line:#d8d8d4; --soft:#f4f4f0; --accent:#176b52; --page:#fbfbf8; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; color:var(--ink); background:var(--page); font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; line-height:1.55; }
a { color:inherit; text-decoration:none; }
.site-header { height:68px; display:grid; grid-template-columns:1fr auto 1fr; align-items:center; padding:0 clamp(20px,5vw,76px); border-bottom:1px solid var(--line); position:sticky; top:0; background:rgba(251,251,248,.94); backdrop-filter:blur(10px); z-index:10; }
.wordmark { font:700 18px/1 ui-monospace,SFMono-Regular,Menlo,monospace; letter-spacing:-.05em; }
.mark { color:var(--accent); }
nav { display:flex; gap:28px; font-size:13px; }
nav a:hover,.intro-links a:hover { color:var(--accent); }
.language { justify-self:end; border:1px solid var(--ink); background:transparent; padding:5px 9px; font:600 11px/1 ui-monospace,monospace; cursor:pointer; }
main { max-width:1240px; margin:auto; padding:0 clamp(20px,5vw,76px); }
.intro { padding:clamp(80px,12vw,150px) 0 clamp(76px,10vw,120px); max-width:900px; }
.eyebrow { color:var(--accent); text-transform:uppercase; letter-spacing:.14em; font:600 11px/1.3 ui-monospace,monospace; }
h1 { margin:22px 0 28px; font-size:clamp(42px,7.2vw,88px); line-height:1.02; letter-spacing:-.055em; font-weight:600; }
.lede { max-width:720px; font-size:clamp(17px,2vw,21px); color:var(--muted); }
.intro-links { display:flex; gap:28px; margin-top:38px; font-size:14px; font-weight:600; }
.principles { display:grid; grid-template-columns:repeat(3,1fr); border-top:1px solid var(--ink); border-bottom:1px solid var(--line); }
.principles div { padding:26px 28px 32px 0; }
.principles div+div { border-left:1px solid var(--line); padding-left:28px; }
.principles span,.section-heading span { color:var(--accent); font:600 11px/1 ui-monospace,monospace; }
.principles strong { display:block; margin:24px 0 8px; font-size:15px; }
.principles p { margin:0; color:var(--muted); font-size:13px; max-width:280px; }
.section { padding:100px 0; border-bottom:1px solid var(--line); }
.section-heading { display:grid; grid-template-columns:80px 1fr; align-items:baseline; margin-bottom:44px; }
h2 { margin:0; font-size:clamp(28px,4vw,48px); letter-spacing:-.04em; font-weight:550; }
h3 { font-size:13px; margin:0 0 14px; }
.split { display:grid; grid-template-columns:1fr 1fr; gap:24px; }
pre { margin:0; padding:22px; overflow:auto; background:var(--soft); border-top:1px solid var(--ink); font:12px/1.8 ui-monospace,SFMono-Regular,Menlo,monospace; }
.note { color:var(--muted); font-size:12px; margin:20px 0 0; }
.section-intro { max-width:720px; color:var(--muted); font-size:17px; margin:-18px 0 34px 80px; }
.downloads { border-top:1px solid var(--ink); margin-bottom:34px; }
.download { display:grid; grid-template-columns:1.2fr 1fr auto; gap:18px; align-items:center; padding:13px 0; border-bottom:1px solid var(--line); font-size:13px; }
.download span { color:var(--muted); font:11px/1.4 ui-monospace,monospace; }
.download a,.inline-link { color:var(--accent); font-weight:600; }
.usage-steps { margin-top:28px; }
.result-controls { display:flex; gap:18px; justify-content:flex-end; margin:-78px 0 38px; }
label { display:grid; gap:5px; color:var(--muted); font-size:10px; text-transform:uppercase; letter-spacing:.08em; }
select { min-width:180px; border:0; border-bottom:1px solid var(--ink); background:transparent; padding:6px 26px 6px 0; font:13px inherit; color:var(--ink); }
.device-meta { display:grid; grid-template-columns:repeat(5,1fr); border-top:1px solid var(--ink); margin-bottom:34px; }
.meta-item { padding:16px 12px 0 0; }
.meta-item span { display:block; color:var(--muted); font-size:10px; text-transform:uppercase; letter-spacing:.08em; }
.meta-item strong { font-size:13px; font-weight:550; }
.table-wrap { overflow-x:auto; }
table { border-collapse:collapse; width:100%; min-width:980px; font-size:12px; }
th { color:var(--muted); font-size:9px; text-transform:uppercase; letter-spacing:.08em; font-weight:600; text-align:left; padding:11px 12px; border-bottom:1px solid var(--ink); }
td { padding:13px 12px; border-bottom:1px solid var(--line); vertical-align:top; }
td.numeric { font:12px/1.5 ui-monospace,monospace; white-space:nowrap; }
.type-line { color:var(--muted); font-size:10px; }
.result-group { margin:58px 0 72px; }
.result-group:first-child { margin-top:36px; }
.group-heading { display:grid; grid-template-columns:minmax(220px,.7fr) 1.3fr; gap:36px; padding:0 0 18px; border-bottom:1px solid var(--ink); }
.group-heading h3 { margin:0; font-size:21px; letter-spacing:-.025em; }
.group-heading p { margin:0; color:var(--muted); font-size:13px; }
.terminology { margin-top:74px; border-top:1px solid var(--ink); padding-top:24px; }
.terminology h3 { font-size:18px; }
.terminology dl { margin:24px 0 0; display:grid; grid-template-columns:220px 1fr; }
.terminology dt,.terminology dd { margin:0; padding:13px 0; border-top:1px solid var(--line); font-size:12px; }
.terminology dt { font:600 11px/1.6 ui-monospace,monospace; }
.terminology dd { color:var(--muted); }
.contribute-copy p { max-width:480px; margin:0; font-size:18px; color:var(--muted); }
footer { max-width:1240px; margin:auto; padding:26px clamp(20px,5vw,76px) 42px; display:flex; justify-content:space-between; color:var(--muted); font:10px/1.4 ui-monospace,monospace; }
.error { color:#9d2b22; padding:20px 0; }
@media (max-width:760px) { .site-header { grid-template-columns:1fr auto; } nav { display:none; } .principles,.split { grid-template-columns:1fr; } .principles div+div { border-left:0; border-top:1px solid var(--line); padding-left:0; } .section { padding:72px 0; } .section-heading { grid-template-columns:42px 1fr; } .section-intro { margin:0 0 28px; } .download { grid-template-columns:1fr auto; } .download span { grid-column:1/-1; grid-row:2; } .result-controls { margin:0 0 30px; justify-content:stretch; flex-direction:column; } select { width:100%; } .device-meta { grid-template-columns:1fr 1fr; } .group-heading { grid-template-columns:1fr; gap:8px; } .terminology dl { grid-template-columns:1fr; } .terminology dd { padding-top:0; border-top:0; } footer { gap:14px; flex-wrap:wrap; } }