/* kb-bench
 *
 * A measurement site. The type is set for reading tables and long prose, and
 * the palette stays quiet so the only colour on a page is doing a job:
 * marking a figure as measured, approximate, or unavailable.
 */

:root {
  --ink: #14181f;
  --ink-2: #4a5361;
  --ink-3: #79838f;
  --paper: #f7f8f9;
  --surface: #ffffff;
  --line: #e0e4e8;
  --line-2: #c7cdd4;
  --accent: #12695c;
  --accent-2: #0d5148;
  --accent-soft: #e3efec;
  --warn: #8a5a08;
  --warn-soft: #fbf1de;
  --risk: #9d3a33;
  --risk-soft: #fae9e7;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "SFMono-Regular", Menlo,
    monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e6eaef;
    --ink-2: #a5aeba;
    --ink-3: #717c8a;
    --paper: #0f1318;
    --surface: #161b22;
    --line: #252c35;
    --line-2: #333c47;
    --accent: #4dbdaa;
    --accent-2: #7ad3c3;
    --accent-soft: #143029;
    --warn: #d6a141;
    --warn-soft: #2b2417;
    --risk: #de766c;
    --risk-soft: #2d1c1a;
  }
}

:root[data-theme="dark"] {
  --ink: #e6eaef;
  --ink-2: #a5aeba;
  --ink-3: #717c8a;
  --paper: #0f1318;
  --surface: #161b22;
  --line: #252c35;
  --line-2: #333c47;
  --accent: #4dbdaa;
  --accent-2: #7ad3c3;
  --accent-soft: #143029;
  --warn: #d6a141;
  --warn-soft: #2b2417;
  --risk: #de766c;
  --risk-soft: #2d1c1a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  background: var(--surface);
  padding: 0.5rem 1rem;
  border: 2px solid var(--accent);
}

/* ---------- chrome ---------- */

header.site,
footer.site {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: baseline;
}

header.site { border-bottom: 1px solid var(--line); }
footer.site {
  border-top: 1px solid var(--line);
  margin-top: 72px;
  flex-direction: column;
  color: var(--ink-2);
  font-size: 14px;
}

.wordmark {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  margin-right: auto;
}

nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14.5px;
  margin-right: 18px;
}
nav a:hover { color: var(--accent); text-decoration: underline; }

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 40px 24px 0;
}

/* ---------- type ---------- */

h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 4.5vw, 44px);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0 0 16px;
  max-width: 20ch;
}

h2 {
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 600;
  line-height: 1.25;
  text-wrap: balance;
  margin: 48px 0 12px;
}

h3 {
  font-size: 16px;
  font-weight: 650;
  margin: 30px 0 8px;
}

p, li { max-width: 68ch; }
p { margin: 0 0 14px; }

a { color: var(--accent); text-underline-offset: 2px; }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--accent-soft);
  border-radius: 3px;
  padding: 1px 5px;
}

.lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 62ch;
}

/* ---------- answer-first summary ---------- */

.tldr {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 18px 22px;
  margin: 28px 0;
  max-width: 72ch;
}
.tldr h2 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 10px;
}
.tldr p:last-child { margin-bottom: 0; }

/* ---------- tables ---------- */

.scroll { overflow-x: auto; margin: 24px 0; }

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 620px;
  font-size: 14.5px;
}

th {
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-3);
  padding: 0 14px 9px 0;
  border-bottom: 1px solid var(--line-2);
  vertical-align: bottom;
}

td {
  padding: 11px 14px 11px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  vertical-align: top;
}
td:first-child { color: var(--ink); font-weight: 550; }

.num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* A figure the run could not observe is not zero, and must not read as one. */
.unavailable { color: var(--ink-3); }
.approx::after {
  content: "~";
  color: var(--warn);
  font-weight: 600;
}

/* A rate computed over part of the corpus must not read like a full one: a
   platform can score highly by skipping the documents it found hard. */
.partial::after {
  content: "*";
  color: var(--risk);
  font-weight: 700;
}
.approx.partial::after { content: "~*"; }

/* ---------- provenance ---------- */

.provenance {
  max-width: 1040px;
  margin: 56px auto 0;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  font-size: 14px;
  color: var(--ink-2);
}
.provenance h2 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 12px;
}
.provenance dl {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  margin: 0 0 12px;
}
.provenance dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.provenance dd { margin: 0; }

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.card {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  padding: 18px 20px;
}
.card h3 { margin: 0 0 6px; }
.card p { font-size: 14px; margin: 0; color: var(--ink-2); }

/* ---------- ranking ---------- */

/* The score is the column a reader scans first, so it gets the weight. */
.score {
  font-size: 17px;
  font-weight: 650;
  color: var(--accent);
}

tr.hl .score { color: var(--accent-2); }

.version {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  font-weight: 400;
  margin-top: 2px;
}