@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/plex-sans-400.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/plex-sans-500.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/plex-sans-600.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/plex-mono-400.woff2) format("woff2")}
@font-face{font-family:"Noto Sans Tamil";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/noto-sans-tamil-400.woff2) format("woff2");unicode-range:U+0B80-0BFF,U+200C-200D}
@font-face{font-family:"Noto Sans Tamil";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/noto-sans-tamil-600.woff2) format("woff2");unicode-range:U+0B80-0BFF,U+200C-200D}
@font-face{font-family:"Plex Sans Fallback";src:local("Arial"),local("Liberation Sans"),local("Helvetica");size-adjust:103.31%;ascent-override:99.22%;descent-override:26.62%;line-gap-override:0.00%}
@font-face{font-family:"Plex Mono Fallback";src:local("Courier New"),local("Liberation Mono");size-adjust:99.98%;ascent-override:102.52%;descent-override:27.50%;line-gap-override:0.00%}
:root{
  --page:#FBFAF7;
  --surface:#F3F1EC;
  --ink:#16161A;
  --ink-2:#3D3C39;
  --muted:#6B6A66;
  --rule:#E4E1DA;
  --rule-2:#CBC7BD;
  --accent:#D23C2A;
  --accent-text:#C23624;
}
@media (prefers-color-scheme:dark){
:root:not([data-theme="light"]){
    --page:#0E0F12;
    --surface:#16171B;
    --ink:#E8E6E1;
    --ink-2:#C2C0BA;
    --muted:#8F8E89;
    --rule:#2A2B30;
    --rule-2:#3E4047;
    --accent:#FF6A55;
    --accent-text:#FF6A55;
}
}
:root[data-theme="dark"]{
  --page:#0E0F12;
  --surface:#16171B;
  --ink:#E8E6E1;
  --ink-2:#C2C0BA;
  --muted:#8F8E89;
  --rule:#2A2B30;
  --rule-2:#3E4047;
  --accent:#FF6A55;
  --accent-text:#FF6A55;
}
/* KuralBench site. Tokens (colours) are prepended by tools/site/build.py. */
:root {
  --sans: "IBM Plex Sans", "Plex Sans Fallback", "Noto Sans Tamil", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "Plex Mono Fallback", "Noto Sans Tamil", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --tamil: "Noto Sans Tamil", "IBM Plex Sans", "Plex Sans Fallback", sans-serif;
  --measure: 1120px;
  --gutter: 24px;
  --radius: 4px;
  --ease: cubic-bezier(.2, .6, .2, 1);
  --t: 180ms;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  font-kerning: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: underline; text-decoration-color: var(--rule-2); text-decoration-thickness: 1px; text-underline-offset: 3px; transition: text-decoration-color var(--t) var(--ease); }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; border-radius: 2px; }
[hidden] { display: none !important; }
code, pre, kbd { font-family: var(--mono); font-size: .875em; font-variant-ligatures: none; }
code { overflow-wrap: anywhere; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }
[lang="ta"] { font-family: var(--tamil); font-size: 1.15em; line-height: 1.8; font-feature-settings: normal; letter-spacing: 0; }
[lang="ta"] [lang="ta"] { font-size: 1em; }
.muted { color: var(--muted); }
.small { font-size: 14px; line-height: 1.5; }
.num { font-variant-numeric: tabular-nums lining-nums; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 16px; top: -80px; z-index: 100; background: var(--ink); color: var(--page); padding: 12px 16px; border-radius: var(--radius); font-size: 15px; }
.skip:focus { top: 8px; }

/* ---------- layout */
.wrap { max-width: calc(var(--measure) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gutter); }
.c4 { grid-column: span 4; } .c5 { grid-column: span 5; } .c6 { grid-column: span 6; } .c7 { grid-column: span 7; } .c8 { grid-column: span 8; }
.sec { padding: 60px 0; border-top: 1px solid var(--rule); }
.sec-head { align-self: start; }
.grid > .sec-head { position: sticky; top: 96px; }
.more { margin: 40px 0 0; }

/* ---------- type */
h1, h2, h3, h4 { margin: 0; font-weight: 500; }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); line-height: 1.04; letter-spacing: -.02em; text-wrap: balance; }
h2 { font-size: 1.75rem; line-height: 1.2; letter-spacing: -.012em; }
h3 { font-size: 1.125rem; line-height: 1.3; }
.kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 20px; font-size: 12px; line-height: 1; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.kicker::before { content: ""; width: 12px; height: 2px; background: var(--accent); flex: none; }
.lede { margin: 16px 0 0; font-size: 1.125rem; line-height: 1.55; color: var(--ink-2); max-width: 36em; }
.mini { margin: 0 0 12px; font-size: 12px; line-height: 1.4; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.sec-head > .small { margin: 20px 0 0; }
.callout { margin: 28px 0 0; padding-top: 16px; border-top: 1px solid var(--rule); font-size: 15px; line-height: 1.55; color: var(--ink-2); }

/* ---------- controls */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px; border: 1px solid transparent; border-radius: var(--radius); font-size: 15px; font-weight: 500; text-decoration: none; cursor: pointer; transition: opacity var(--t) var(--ease), background-color var(--t) var(--ease), border-color var(--t) var(--ease); }
.btn-solid { background: var(--ink); color: var(--page); }
.btn-solid:hover { opacity: .88; }
.btn-quiet { background: transparent; border-color: var(--rule-2); color: var(--ink); }
.btn-quiet:hover { border-color: var(--ink); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 20px; }
.chip { min-height: 44px; padding: 0 16px; background: transparent; border: 1px solid var(--rule-2); border-radius: var(--radius); font-size: 15px; font-weight: 500; cursor: pointer; transition: background-color var(--t) var(--ease), border-color var(--t) var(--ease); }
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--page); }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; background: transparent; border: 0; border-radius: var(--radius); color: var(--ink-2); cursor: pointer; transition: color var(--t) var(--ease); }
.icon-btn:hover { color: var(--ink); }
.menu-btn { display: none; }

/* code blocks */
.code { background: var(--surface); border-radius: var(--radius); overflow: hidden; }
.code-bar { display: flex; align-items: center; justify-content: space-between; min-height: 44px; padding: 0 4px 0 16px; border-bottom: 1px solid var(--rule); font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.code pre { margin: 0; padding: 16px; overflow-x: auto; font-size: 14px; line-height: 1.65; color: var(--ink); tab-size: 2; }
.code pre code { font-size: inherit; overflow-wrap: normal; }
.copy { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 12px; background: transparent; border: 0; border-radius: var(--radius); font-size: 14px; font-weight: 500; letter-spacing: 0; text-transform: none; color: var(--ink-2); cursor: pointer; transition: color var(--t) var(--ease); }
.copy:hover { color: var(--ink); }
.code-hero pre { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 13px; padding-inline: 14px; }

/* ---------- header / footer */
.site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--page) 85%, transparent); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-bottom: 1px solid var(--rule); }
.bar { display: flex; align-items: center; gap: 24px; height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 600; letter-spacing: -.01em; text-decoration: none; min-height: 44px; }
.mark { width: 28px; height: 28px; }
.mark-dark { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .mark-light { display: none; } :root:not([data-theme="light"]) .mark-dark { display: block; } }
:root[data-theme="dark"] .mark-light { display: none; }
:root[data-theme="dark"] .mark-dark { display: block; }
.nav { display: flex; gap: 2px; margin-left: auto; }
.nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; font-size: 14.5px; color: var(--ink-2); text-decoration: none; transition: color var(--t) var(--ease); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"] { box-shadow: none; text-decoration: underline; text-decoration-color: var(--ink); text-underline-offset: 8px; }
.tools { display: flex; align-items: center; gap: 0; }

.site-footer { padding: 56px 0 64px; border-top: 1px solid var(--rule); }
.foot-grid { display: grid; grid-template-columns: 1fr auto; gap: 24px 48px; align-items: start; }
.foot-brand p { margin: 8px 0 0 38px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 0 8px; justify-content: flex-end; }
.foot-links a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 8px; font-size: 15px; }
.foot-by { grid-column: 1 / -1; margin: 0; padding-top: 24px; border-top: 1px solid var(--rule); }

/* ---------- hero */
.hero { padding: 80px 0 72px; }
.hero .grid { align-items: start; row-gap: 56px; }
.hero h1 { max-width: 11ch; }
.hero .lede { margin-top: 28px; font-size: 1.1875rem; }
.plate { margin: 0; container-type: inline-size; }
.plate-head { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 12px; margin-bottom: 16px; border-bottom: 1px solid var(--ink); font: 400 12px/1 var(--mono); color: var(--muted); letter-spacing: .02em; }
.plate-no { color: var(--ink); }
.seers { display: grid; gap: 10px; }
.seer-line > ol { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.seer { display: grid; grid-template-rows: auto 1fr auto; min-height: 112px; padding: 10px 12px 12px; border: 1px solid var(--rule-2); border-radius: var(--radius); transition: border-color var(--t) var(--ease); }
.seer-last { width: 72%; border-color: var(--accent); }
.seer-n { font: 400 11px/1 var(--mono); color: var(--muted); }
.seer-w { align-self: center; padding: 6px 0; font-size: 1.08rem; line-height: 1.5; color: var(--ink); overflow-wrap: normal; }
.seer-f { font: 400 12px/1.4 var(--mono); color: var(--muted); }
.seer-f[lang="ta"] { font-size: 12px; line-height: 1.6; }
.notes { margin: 28px 0 0; border-top: 1px solid var(--rule); }
.note { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 0 20px; padding: 16px 0; border-bottom: 1px solid var(--rule); }
.note dt { padding-top: 3px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.note dd { margin: 0; font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.note-ta { font-size: 1.15rem; line-height: 1.6; color: var(--ink); }
.note-ta [lang="ta"] { font-size: 1em; line-height: 1.8; }
.note-src { display: block; margin-top: 6px; font-size: 13px; line-height: 1.45; color: var(--muted); }
.note-src code { font-size: 12px; }
.chg { text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 5px; text-decoration-skip-ink: none; }

@container (max-width: 620px) {
  .seers { gap: 14px; }
  .seer-line > ol { display: flex; flex-wrap: wrap; gap: 8px; }
  .seer { display: flex; flex-direction: column; align-items: flex-start; gap: 0; min-height: 0; max-width: 100%; padding: 6px 10px 8px; }
  .seer-last { width: auto; }
  .seer-n { font-size: 10px; }
  .seer-w { align-self: flex-start; padding: 2px 0 4px; font-size: 1rem; line-height: 1.5; }
  .seer-f { font-size: 11px; }
}

/* ---------- stat line */
.statline { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stats li { display: flex; flex-direction: column; gap: 6px; padding: 36px 24px 32px; border-left: 1px solid var(--rule); }
.stats li:first-child { border-left: 0; padding-left: 0; }
.stat-n { font-size: clamp(2.25rem, 4.6vw, 3.5rem); line-height: 1; font-weight: 500; letter-spacing: -.02em; font-variant-numeric: tabular-nums lining-nums; }
.stat-l { font-size: 14px; line-height: 1.4; color: var(--muted); }
.stat-s { font: 400 12px/1.4 var(--mono); color: var(--muted); }

/* ---------- measures */
.cols3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 var(--gutter); margin-top: 56px; }
.col { padding-top: 20px; border-top: 1px solid var(--ink); }
.col p { margin: 12px 0 0; font-size: 15.5px; line-height: 1.55; color: var(--ink-2); }
.col .col-k { margin-top: 20px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.tl { margin-top: 8px; }
.tl li { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 12px; padding: 14px 0; border-top: 1px solid var(--rule); }
.tl li:first-child { border-top: 0; }
.tl-id { font: 500 14px/1.4 var(--mono); text-decoration: none; }
.tl-id:hover { text-decoration: underline; }
.tl-n, .tl-c { font: 400 12.5px/1.5 var(--mono); color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.tl-g { font-size: 14.5px; line-height: 1.4; color: var(--ink-2); }
.beside { margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 220px minmax(0, 1fr); column-gap: var(--gutter); }
.beside-t { grid-row: span 2; margin: 0; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding-top: 5px; }
.beside-row { display: flex; flex-wrap: wrap; gap: 24px 56px; }
.beside-h { margin: 0 0 8px; font-size: 14px; font-weight: 500; color: var(--ink-2); }
.beside-l { display: flex; flex-wrap: wrap; gap: 4px 28px; }
.beside-l li { display: flex; flex-direction: column; gap: 2px; }
.floor-v { font: 400 12.5px/1.4 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.beside-n { grid-column: 2; margin: 20px 0 0; }
.formula { margin-top: 64px; padding: 36px 0 28px; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.formula-eq { margin: 0; font: 400 clamp(1.15rem, 3.4vw, 2rem)/1.3 var(--mono); letter-spacing: -.01em; font-variant-ligatures: none; }
.fq-o, .fq-f, .fq-c { color: var(--muted); }
.fq-l { font-weight: 500; }
.formula-n { margin: 16px 0 0; font-size: 15px; color: var(--ink-2); }

/* ---------- tasks teaser and index */
.tgroups { margin-top: 56px; }
.tgroup { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gutter); padding: 28px 0 8px; border-top: 1px solid var(--ink); }
.tgroup + .tgroup { margin-top: 40px; }
.tgroup-h { grid-column: span 3; }
.tgroup-h p { margin: 6px 0 0; }
.tgrid { grid-column: span 9; display: grid; grid-template-columns: repeat(auto-fill, minmax(236px, 1fr)); column-gap: var(--gutter); }
.tcard { position: relative; display: flex; flex-direction: column; gap: 8px; padding: 16px 0 20px; border-top: 1px solid var(--rule); text-decoration: none; transition: border-color var(--t) var(--ease); }
.tgroup .tcard:nth-child(-n+3) { border-top-color: transparent; }
.tcard:hover { border-top-color: var(--ink); }
.tcard-id { font: 500 14px/1.3 var(--mono); }
.tcard:hover .tcard-id { text-decoration: underline; text-underline-offset: 3px; }
.tcard-ask { font-size: 15px; line-height: 1.45; color: var(--ink-2); }
.tcard-meta { display: flex; flex-wrap: wrap; gap: 2px 14px; margin-top: auto; padding-top: 6px; font: 400 12px/1.5 var(--mono); color: var(--muted); }
.tcard-flag { position: absolute; top: 16px; right: 0; display: inline-flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.tcard-flag::before { content: ""; width: 7px; height: 7px; border: 1.5px solid var(--muted); border-radius: 50%; }
.tcard-flag[data-headline="true"] { color: var(--ink-2); }
.tcard-flag[data-headline="true"]::before { background: var(--ink-2); border-color: var(--ink-2); }
.tcard-id { padding-right: 84px; }

/* ---------- baselines */
.plot { margin: 0; }
.plot-rows { border-bottom: 1px solid var(--rule); }
.pr { display: grid; grid-template-columns: 104px minmax(0, 1fr) 140px; align-items: center; column-gap: 16px; min-height: 48px; border-top: 1px solid var(--rule); }
.pr-id { font: 400 12.5px/1.2 var(--mono); text-decoration: none; }
.pr-id:hover { text-decoration: underline; }
.pr-svg { overflow: visible; margin-inline: 0; }
.pr-svg .g { stroke: var(--rule); stroke-width: 1; shape-rendering: crispEdges; }
.pr-svg .chance { stroke: var(--ink); stroke-width: 2; stroke-linecap: butt; }
.pr-svg .dot { fill: var(--ink-2); fill-opacity: .32; stroke: none; }
.pr-svg .dot.best { fill: var(--ink); fill-opacity: 1; stroke: var(--page); stroke-width: 2; }
.pr-svg .dot.best.flag { fill: var(--accent); }
.pr-best { font-size: 13px; line-height: 1.35; color: var(--ink-2); text-align: right; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0 6px; }
.pr-v { font-weight: 500; color: var(--ink); font-variant-numeric: tabular-nums; }
.pr-n { color: var(--muted); }
.pf { flex-basis: 100%; font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-text); }
.plot-axis { display: grid; grid-template-columns: 104px minmax(0, 1fr) 140px; column-gap: 16px; padding-top: 6px; }
.plot-axis svg { overflow: visible; }
.ax { font: 400 11px var(--mono); fill: var(--muted); }
.plot figcaption { display: flex; flex-wrap: wrap; gap: 6px 22px; margin-top: 20px; font-size: 13px; line-height: 1.5; color: var(--muted); }
.lg { display: inline-flex; align-items: center; gap: 8px; }
.lg-dot { width: 10px; height: 10px; background: color-mix(in srgb, var(--ink-2) 32%, transparent); border-radius: 50%; flex: none; }
.lg-best { background: var(--ink); }
.lg-flag { background: var(--accent); }
.lg-tick { width: 2px; height: 12px; background: var(--ink); flex: none; }
.tail { margin-top: 56px; }
.headline-line { max-width: 44em; margin: 24px 0 0; font-size: 16px; color: var(--ink-2); }
.headline-line strong { font-size: 1.15em; font-weight: 500; color: var(--ink); }

/* tables */
.tablewrap { overflow-x: auto; }
.tcap { margin: 0 0 14px; font-size: 12px; line-height: 1.4; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.tnote { margin: 14px 0 0; }
.data tbody tr.grp th { padding: 20px 0 8px; font: 600 12px/1.4 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); white-space: normal; }
.grp-t { position: sticky; left: 0; display: inline-block; max-width: calc(100vw - 2 * var(--gutter)); }
.data tbody tr.grp + tr th, .data tbody tr.grp + tr td { border-top: 1px solid var(--rule); }
.data { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.4; }
.data caption { padding: 0 0 14px; text-align: left; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.data th, .data td { padding: 10px 16px 10px 0; text-align: left; vertical-align: baseline; border-top: 1px solid var(--rule); white-space: nowrap; }
.data thead th { padding-top: 0; padding-bottom: 10px; border-top: 0; border-bottom: 1px solid var(--ink); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.data tbody th { font: 400 13.5px/1.4 var(--mono); }
.data tbody th a { text-decoration: none; }
.data tbody th a:hover { text-decoration: underline; }
.data .num { text-align: right; font-variant-numeric: tabular-nums lining-nums; }
.data th.num, .data td.num { padding-right: 24px; }
.data tbody tr:last-child th, .data tbody tr:last-child td { border-bottom: 1px solid var(--rule); }
.flag-mk { display: inline-block; width: 8px; height: 8px; margin-right: 8px; background: var(--accent); border-radius: 50%; }
.data tr.ref th, .data tr.ref td { color: var(--muted); }
.data tr.ref th code { color: var(--muted); font-size: 13.5px; }
.state { margin: 32px 0 28px; padding: 16px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); font-size: 16px; color: var(--ink-2); }
.state strong { color: var(--ink); font-weight: 500; }
.sec .state { margin-top: 40px; }

/* ---------- run / tabs */
.tablist { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--rule); overflow-x: auto; }
[role="tab"] { min-height: 44px; padding: 0 14px; background: transparent; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; font-size: 15px; font-weight: 500; color: var(--muted); white-space: nowrap; cursor: pointer; transition: color var(--t) var(--ease), border-color var(--t) var(--ease); }
[role="tab"]:hover { color: var(--ink); }
[role="tab"][aria-selected="true"] { color: var(--ink); border-bottom-color: var(--ink); }
[role="tab"]:focus-visible { outline-offset: -2px; }
[role="tabpanel"] { outline-offset: 4px; }
[role="tabpanel"] .code pre { min-height: 8.5em; }

/* ---------- downloads, cite, faq */
.links > div { display: grid; grid-template-columns: 170px minmax(0, 1fr); column-gap: var(--gutter); padding: 16px 0; border-top: 1px solid var(--rule); }
.links > div:last-child { border-bottom: 1px solid var(--rule); }
.links dt { font-size: 14px; font-weight: 500; color: var(--ink-2); padding-top: 2px; }
.links dd { margin: 0; font-size: 15px; line-height: 1.5; overflow-wrap: anywhere; }
.links dd .small { display: block; margin-top: 2px; }
.inline-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); gap: 4px 12px; margin-bottom: 4px; }
.inline-links a { font: 400 13px/1.7 var(--mono); }
.c7 > .mini + .code { margin-bottom: 28px; }
.c7 > .mini:not(:first-child) { margin-top: 8px; }
.faq { border-bottom: 1px solid var(--rule); }
.qa { border-top: 1px solid var(--rule); }
.qa summary { position: relative; display: flex; align-items: center; min-height: 56px; padding: 12px 40px 12px 0; font-size: 17px; font-weight: 500; line-height: 1.35; cursor: pointer; list-style: none; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::before, .qa summary::after { content: ""; position: absolute; right: 8px; top: 50%; width: 14px; height: 1.5px; background: var(--ink-2); transition: transform var(--t) var(--ease); }
.qa summary::after { transform: rotate(90deg); }
.qa[open] summary::after { transform: rotate(0deg); }
.qa p { max-width: 40em; margin: 0 0 24px; font-size: 16px; color: var(--ink-2); }

/* ---------- inner pages */
.page-head { padding: 56px 0 40px; border-bottom: 1px solid var(--rule); }
.page-head h1 { font-size: clamp(2.25rem, 4.6vw, 3.5rem); }
.page-head .lede { max-width: 40em; }
.crumbs { margin-bottom: 32px; font-size: 14px; color: var(--muted); }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 4px 0; }
.crumbs li + li::before { content: "/"; margin: 0 10px; color: var(--rule-2); }
.crumbs li[aria-current] { color: var(--ink-2); }
.crumbs code { font-size: 13px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.tasks-wrap { padding-top: 40px; padding-bottom: 40px; }
.tasks-wrap .tgroup { padding-top: 24px; }
.tasks-wrap .tgroup-h h2 { font-size: 1.25rem; }
.tasks-wrap .tgroup-h p { max-width: 20em; }
.task-h { display: flex; flex-direction: column; gap: 14px; }
.task-code { font: 500 1.125rem/1.2 var(--mono); letter-spacing: 0; color: var(--ink-2); }
.task-body { padding-top: 48px; padding-bottom: 24px; align-items: start; }
.task-facts { position: sticky; top: 88px; }
.facts > div { padding: 12px 0; border-top: 1px solid var(--rule); }
.facts > div:last-child { border-bottom: 1px solid var(--rule); }
.facts dt { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.facts dd { margin: 4px 0 0; font-size: 15.5px; line-height: 1.45; }
.facts dd code { font-size: 13.5px; }
.flag-t { display: block; margin-top: 2px; font-size: 13px; color: var(--ink-2); }
.task-sec { margin-bottom: 56px; }
.task-sec > h2 { margin-bottom: 8px; font-size: 1.5rem; }
.task-sec > p { max-width: 40em; }
.viewer { margin-top: 20px; }
.v-bar { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.v-count { margin-right: auto; font: 400 13px/1 var(--mono); color: var(--muted); }
.sample { padding: 24px; background: var(--surface); border-radius: var(--radius); }
.static-items .sample + .sample { margin-top: 16px; }
.s-id { margin: 0 0 16px; }
.s-id code { font-size: 12.5px; color: var(--muted); }
.s-block { margin-bottom: 20px; }
.s-block h4 { margin: 0 0 6px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.s-block p { margin: 0; font-size: 15.5px; line-height: 1.55; white-space: pre-wrap; }
.s-prompt { color: var(--ink); }
.choices { display: grid; gap: 0; }
.choices li { display: grid; grid-template-columns: 32px minmax(0, 1fr); padding: 10px 0; border-top: 1px solid var(--rule); font-size: 15.5px; line-height: 1.5; white-space: pre-wrap; }
.choices li:first-child { border-top: 0; padding-top: 4px; }
.ch-l { font: 500 13px/1.9 var(--mono); color: var(--muted); }
.choices li.is-key { font-weight: 500; }
.choices li.is-key .ch-l { color: var(--ink); }
.choices li.is-key .ch-t { text-decoration: underline; text-decoration-color: var(--ink); text-decoration-thickness: 1.5px; text-underline-offset: 5px; text-decoration-skip-ink: none; }
.s-det { margin-top: 4px; border-top: 1px solid var(--rule); }
.s-det summary { display: flex; align-items: center; min-height: 44px; font-size: 15px; font-weight: 500; cursor: pointer; }
.s-ans { margin: 4px 0 0; white-space: pre-wrap; }
.s-ans-pre { margin: 4px 0 0; padding: 0; font: 400 15.5px/1.6 var(--sans); white-space: pre-wrap; }
.spec-row { margin: 16px 0 24px; }
.spec-row > div { display: grid; grid-template-columns: 110px minmax(0, 1fr); column-gap: var(--gutter); padding: 12px 0; border-top: 1px solid var(--rule); }
.spec-row > div:last-child { border-bottom: 1px solid var(--rule); }
.spec-row dt { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding-top: 4px; }
.spec-row dd { margin: 0; font-size: 15.5px; line-height: 1.55; }
.pn-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); padding-top: 24px; border-top: 1px solid var(--rule); }
.pn { display: flex; flex-direction: column; gap: 2px; min-height: 44px; text-decoration: none; }
.pn code { font-size: 14px; font-weight: 500; }
.pn:hover code { text-decoration: underline; }
.pn-next { grid-column: 2; text-align: right; }
.lb-body { padding-top: 24px; padding-bottom: 80px; }
.lb-notes { margin-top: 64px; row-gap: 32px; }
.lb-notes p { max-width: 36em; font-size: 15.5px; color: var(--ink-2); }

/* ---------- footer-adjacent small screens */
@media (max-width: 1000px) {
  .c4, .c5, .c6, .c7, .c8, .grid > .sec-head { grid-column: 1 / -1; }
  .grid > .sec-head { position: static; margin-bottom: 40px; }
  .hero { padding-top: 56px; }
  .hero h1 { max-width: 14ch; }
  .task-facts { position: static; margin-bottom: 48px; }
  .tgroup-h { grid-column: 1 / -1; margin-bottom: 8px; }
  .tgrid { grid-column: 1 / -1; }
  .tgroup .tcard:nth-child(-n+3) { border-top-color: var(--rule); }
  .cols3 { grid-template-columns: 1fr; row-gap: 40px; }
  .beside { grid-template-columns: 1fr; }
  .beside-t { grid-row: auto; margin-bottom: 16px; }
  .beside-n { grid-column: 1; }
}
@media (max-width: 760px) {
  :root { --gutter: 20px; }
  body { font-size: 16.5px; }
  .sec { padding: 36px 0; }
  .menu-btn { display: inline-flex; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 56px; flex-direction: column; gap: 0; margin: 0; padding: 8px 20px 16px; background: var(--page); border-bottom: 1px solid var(--rule); }
  .nav.open { display: flex; }
  .nav a { min-height: 48px; padding: 0; border-top: 1px solid var(--rule); font-size: 16px; }
  .nav a:first-child { border-top: 0; }
  .bar { gap: 8px; }
  .tools { margin-left: auto; }
  html:not(.js) .site-header { position: static; }
  html:not(.js) .bar { height: auto; flex-wrap: wrap; padding-block: 4px; }
  html:not(.js) .nav { display: flex; position: static; flex-direction: row; flex-wrap: wrap; order: 3; width: 100%; padding: 0; border: 0; }
  html:not(.js) .nav a { border: 0; padding: 0 12px 0 0; }
  html:not(.js) .menu-btn { display: none; }
  .hero { padding: 40px 0 48px; }
  .hero .grid { row-gap: 40px; }
  .note { grid-template-columns: 1fr; row-gap: 6px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats li { padding: 24px 16px 22px; border-left: 0; border-top: 1px solid var(--rule); }
  .stats li:nth-child(-n+2) { border-top: 0; }
  .stats li:nth-child(2n+1) { padding-left: 0; }
  .stats li:nth-child(2n) { border-left: 1px solid var(--rule); }
  .pr { grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "id best" "svg svg"; row-gap: 2px; padding: 10px 0 6px; }
  .pr-id { grid-area: id; }
  .pr-best { grid-area: best; flex-wrap: nowrap; align-items: baseline; gap: 6px; }
  .pf { flex-basis: auto; }
  .pr-svg { grid-area: svg; }
  .plot-axis { grid-template-columns: 1fr; }
  .plot-axis span { display: none; }
  .links > div { grid-template-columns: 1fr; row-gap: 4px; }
  .foot-grid { grid-template-columns: 1fr; }
  .foot-links { justify-content: flex-start; margin-left: -8px; }
  .spec-row > div { grid-template-columns: 1fr; row-gap: 2px; }
  .sample { padding: 18px 16px; }
  .lb th:nth-child(2), .lb td:nth-child(2) { display: none; }
  .lb thead th { white-space: normal; }
  .lb .ci { display: block; font-size: 12px; }
  .tablewrap { background:
      linear-gradient(to right, var(--page), var(--page)) left center / 28px 100% no-repeat local,
      linear-gradient(to left, var(--page), var(--page)) right center / 28px 100% no-repeat local,
      linear-gradient(to right, var(--rule-2), transparent) left center / 14px 100% no-repeat scroll,
      linear-gradient(to left, var(--rule-2), transparent) right center / 14px 100% no-repeat scroll; }
  .data { font-size: 14px; }
  .data th, .data td { padding-right: 10px; }
  .data th.num, .data td.num { padding-right: 8px; }
  .data thead th { font-size: 11px; letter-spacing: .03em; }
  .data tbody th { font-size: 12.5px; }
  .page-head { padding: 36px 0 32px; }
  .crumbs { margin-bottom: 24px; }
  .tcard-id { padding-right: 84px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

.code pre.wrap-pre { white-space: pre-wrap; overflow-wrap: anywhere; }