/* avatar-lab — shared tokens.
   The subject is measurement, so the visual language comes from instruments:
   monospace for readouts and headings, tabular numerals everywhere digits
   line up, semantic pass/fail kept separate from the accent hue. */
:root{
  --paper:#F4F5F6; --raised:#FFFFFF; --ink:#16181C; --muted:#6A6F78;
  --faint:#9AA0A8; --rule:#DDE0E3; --accent:#12626E; --accent-soft:#E3EFF1;
  --pass:#2E7D4F; --fail:#B3452F; --warn:#8A6A1F;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#101215; --raised:#181B1F; --ink:#E8EAED; --muted:#9AA1A9;
    --faint:#6C737B; --rule:#2A2E34; --accent:#4FC0CE; --accent-soft:#16292D;
    --pass:#5FB98A; --fail:#E08A72; --warn:#C9A54B;
  }
}
:root[data-theme="dark"]{
  --paper:#101215; --raised:#181B1F; --ink:#E8EAED; --muted:#9AA1A9;
  --faint:#6C737B; --rule:#2A2E34; --accent:#4FC0CE; --accent-soft:#16292D;
  --pass:#5FB98A; --fail:#E08A72; --warn:#C9A54B;
}
:root[data-theme="light"]{
  --paper:#F4F5F6; --raised:#FFFFFF; --ink:#16181C; --muted:#6A6F78;
  --faint:#9AA0A8; --rule:#DDE0E3; --accent:#12626E; --accent-soft:#E3EFF1;
  --pass:#2E7D4F; --fail:#B3452F; --warn:#8A6A1F;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);
  font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:860px;margin:0 auto;padding:0 24px 96px}
.measure{max-width:66ch}

h1,h2,h3,.eyebrow,.brand,.stamp{font-family:var(--mono)}
h1{font-size:clamp(28px,4.4vw,42px);line-height:1.15;letter-spacing:-.03em;
  margin:0 0 14px;text-wrap:balance;font-weight:600}
h2{font-size:20px;letter-spacing:-.02em;margin:0 0 6px;font-weight:600;text-wrap:balance}
h3{font-size:15.5px;letter-spacing:-.01em;margin:0 0 6px;font-weight:600}
p{margin:0 0 14px}
a{color:var(--accent)}
a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
strong{font-weight:650}
.eyebrow{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--faint);margin:0 0 10px}
.lede{font-size:19px;line-height:1.5;margin:0 0 20px;text-wrap:pretty}
.small{font-size:14px;line-height:1.6;color:var(--muted)}
.tiny{font-size:12.5px;line-height:1.55;color:var(--faint)}

/* site chrome */
nav.site{display:flex;align-items:baseline;gap:22px;flex-wrap:wrap;
  padding:22px 0 20px;border-bottom:1px solid var(--rule)}
.brand{font-weight:650;letter-spacing:-.03em;font-size:16px;
  color:var(--ink);text-decoration:none;margin-right:auto}
.brand em{font-style:normal;color:var(--accent)}
nav.site a.nl{font-size:13.5px;color:var(--muted);text-decoration:none;
  font-family:var(--mono);letter-spacing:-.01em}
nav.site a.nl:hover,nav.site a.nl[aria-current="page"]{color:var(--accent)}

header.top{padding:52px 0 30px;border-bottom:1px solid var(--rule);margin-bottom:34px}
.stamp{font-size:11.5px;color:var(--faint);letter-spacing:.04em}

section{padding:34px 0;border-top:1px solid var(--rule)}
section:first-of-type{border-top:none}
.sechead{margin-bottom:18px}

/* generic surfaces */
.note{background:var(--accent-soft);border:1px solid var(--rule);border-radius:2px;
  padding:15px 18px;margin:16px 0;font-size:14.5px;line-height:1.6}
.note p{margin:0}
.note p+p{margin-top:8px}
.card{background:var(--raised);border:1px solid var(--rule);border-radius:2px;
  padding:16px 18px}

.pair{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule);
  border:1px solid var(--rule);border-radius:2px;overflow:hidden;margin:4px 0 0}
.pair>div{background:var(--raised);padding:18px 20px}
.pair h3{color:var(--accent)}
.pair.neg h3,.pair>div.neg h3{color:var(--fail)}
.pair ul{margin:0;padding-left:17px}
.pair li{margin:5px 0;font-size:14.5px;line-height:1.55;color:var(--muted)}

.tablewrap{overflow-x:auto;margin:18px 0 10px;border:1px solid var(--rule);
  border-radius:2px;background:var(--raised)}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:14px}
th,td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--rule);
  vertical-align:middle}
thead th{font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--faint);font-weight:600;
  border-bottom:1px solid var(--ink);white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
td.num{font-family:var(--mono);font-variant-numeric:tabular-nums;text-align:right;
  white-space:nowrap}
td.name{font-weight:600;white-space:nowrap}
td .mech{display:block;font-size:12px;color:var(--faint);font-weight:400;
  font-family:var(--mono);letter-spacing:-.01em}
tr.hi td{background:var(--accent-soft)}

ul.plain{margin:0 0 14px;padding-left:18px}
ul.plain li{margin:6px 0;color:var(--muted);font-size:15px;line-height:1.6}
ul.plain li strong{color:var(--ink)}

code{font-family:var(--mono);font-size:.9em;background:var(--accent-soft);
  padding:1px 5px;border-radius:2px}
pre{font-family:var(--mono);font-size:13px;line-height:1.55;background:var(--raised);
  border:1px solid var(--rule);border-radius:2px;padding:14px 16px;
  overflow-x:auto;margin:12px 0;white-space:pre;color:var(--ink)}
pre .bad{color:var(--fail)}
pre .good{color:var(--pass)}

footer{border-top:1px solid var(--rule);margin-top:34px;padding-top:26px}

@media (max-width:640px){
  .pair{grid-template-columns:1fr}
  body{font-size:16px}
}