/* About page. Builds on dashboard.css tokens and components. */
.doc-hero {
  padding-top: 72px;
  padding-bottom: 48px;
}
.doc-hero h1 {
  margin-top: 18px;
}
.doc-lede {
  margin: 24px 0 0;
  max-width: 620px;
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--muted);
}
.doc-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 48px 0 0;
  border-top: 1px solid var(--rule-strong);
}
.doc-facts div {
  padding: 14px 20px 0 0;
}
.doc-facts dt,
.spec dt {
  font-size: 11px;
  color: var(--muted);
}
.doc-facts dd {
  margin: 4px 0 0;
  font-size: 18px;
}

.doc-section {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(0, 2.6fr);
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 64px;
}
.doc-section + .doc-section {
  border-top: 1px solid var(--rule);
}
.doc-head {
  align-self: start;
  position: sticky;
  top: 84px;
}
.doc-head h2 {
  margin-top: 12px;
}
.doc-body {
  display: grid;
  gap: 28px;
  min-width: 0;
  max-width: 820px;
}
.doc-p {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.45;
  letter-spacing: -0.005em;
}
.fold .doc-p {
  font-size: 16px;
  color: var(--muted);
}

.doc-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.doc-stats div {
  padding-left: 18px;
  border-left: 1px solid var(--rule-strong);
  display: grid;
  gap: 4px;
}
.doc-stats b {
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1;
}
.doc-stats span {
  font-size: 12px;
  color: var(--muted);
}

.mix {
  display: flex;
  height: 10px;
  gap: 2px;
  margin-bottom: -16px;
}
.mix-s {
  background: var(--review);
}
.mix-o {
  background: var(--neutral);
}
.mix-b {
  background: var(--clear);
}
.mix-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 12px;
  color: var(--muted);
}
.mix-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.mix-legend i {
  width: 8px;
  height: 8px;
}

.sub {
  display: grid;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--rule-strong);
}
.sub-no {
  margin: 0;
  font: 500 11px var(--mono);
  color: var(--faint);
}
.sub h3 {
  margin-top: -8px;
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.03em;
}
.doc-p strong {
  font-weight: 600;
}
.doc-p.muted {
  font-size: 15px;
  color: var(--muted);
}
.example {
  margin: 0;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--teal);
  font-family: var(--serif);
  font-size: 16px;
  font-style: italic;
  line-height: 1.45;
  color: var(--muted);
}
:root[data-theme="dark"] .example {
  border-color: var(--teal-line);
}
.doc-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.4;
}
.doc-list li::marker {
  color: var(--faint);
}
.fold .spec {
  margin-bottom: 4px;
}
.chart-card {
  margin: 0;
  padding: 18px 20px 12px;
  border: 1px solid var(--rule-strong);
  background: var(--panel);
}
.chart-card figcaption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--muted);
}
.chart-key {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.chart-key i {
  width: 14px;
  height: 2px;
  margin-left: 8px;
}
.k-train {
  background: var(--faint);
}
.k-val {
  background: var(--teal);
}
:root[data-theme="dark"] .k-val {
  background: var(--teal-line);
}
.chart-card svg {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 8px;
  overflow: visible;
}
.chart-card .grid line {
  stroke: var(--rule);
}
.chart-card .grid text,
.chart-card .x-label {
  font: 10.5px var(--sans);
  fill: var(--faint);
}
.chart-card .train {
  fill: none;
  stroke: var(--faint);
  stroke-width: 1.5;
}
.chart-card .val {
  fill: none;
  stroke: var(--teal);
  stroke-width: 2.5;
}
.chart-card .val-dot {
  fill: var(--panel);
  stroke: var(--teal);
  stroke-width: 2;
}
:root[data-theme="dark"] .chart-card .val,
:root[data-theme="dark"] .chart-card .val-dot {
  stroke: var(--teal-line);
}
.chart-card .marker line {
  stroke: var(--ink);
  stroke-dasharray: 3 3;
}
.chart-card .marker text {
  font: 500 11px var(--sans);
  fill: var(--ink);
}
.chart-card .marker.stop line {
  stroke: var(--review);
}
.chart-card .marker.stop text {
  fill: var(--review);
}

.spec {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--rule-strong);
}
.spec div {
  display: grid;
  grid-template-columns: minmax(120px, 0.8fr) minmax(0, 1.2fr);
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.spec dd {
  margin: 0;
  font-size: 13.5px;
}
.spec-wide div {
  grid-template-columns: minmax(140px, 0.45fr) minmax(0, 1.55fr);
}
.spec-grid,
.compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}
.compare .eyebrow {
  margin-bottom: 10px;
}
.compare > div:last-child dd {
  font-weight: 600;
}

.band .doc-body {
  max-width: 880px;
}
.band.band {
  padding: 0;
}
.pipe {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  counter-reset: none;
}
.pipe li {
  position: relative;
  display: grid;
  gap: 3px;
  padding: 14px 16px;
  border: 1px solid var(--rule-strong);
  font-size: 12px;
  color: var(--muted);
}
.pipe li + li {
  border-left: 0;
}
.pipe li + li::before {
  content: "→";
  position: absolute;
  left: -7px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--paper);
  color: var(--teal-line);
  font-size: 12px;
  line-height: 1;
}
.pipe small {
  font-size: 10.5px;
  color: var(--faint);
}
.pipe b {
  font: 500 14px var(--mono);
  color: var(--ink);
}
.code {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  background: #0000002e;
  border: 1px solid var(--rule-strong);
  font: 12.5px/1.6 var(--mono);
  color: var(--ink);
}

.chart-key i.k-base,
.chart-key i.k-sft {
  width: 10px;
  height: 10px;
}
.k-base {
  background: var(--neutral);
}
.k-sft {
  background: var(--teal);
}
:root[data-theme="dark"] .k-sft {
  background: var(--teal-line);
}
.eval-bars {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}
.eval-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
}
.eval-label {
  font-size: 13px;
  text-align: right;
}
.eval-pair {
  display: grid;
  gap: 3px;
  padding-right: 52px;
  border-left: 1px solid var(--rule-strong);
}
.eval-pair i {
  position: relative;
  display: block;
  height: 14px;
  width: calc(var(--v) * 1%);
}
.eval-pair b {
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  font: 500 11.5px var(--sans);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--muted);
}
.b-base {
  background: var(--neutral);
}
.b-sft {
  background: var(--teal);
}
.b-sft b {
  color: var(--ink);
}
:root[data-theme="dark"] .b-sft {
  background: var(--teal-line);
}
.eval-note {
  margin: 18px 0 2px;
  font-size: 11px;
  color: var(--faint);
}
.eval-case {
  display: grid;
  gap: 10px;
}
.eval-case-title {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.35;
}
@media (max-width: 900px) {
  .eval-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
  .eval-label {
    text-align: left;
  }
  .doc-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 48px;
    padding-bottom: 48px;
  }
  .doc-head {
    position: static;
  }
  .doc-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 16px;
  }
  .pipe {
    grid-template-columns: minmax(0, 1fr);
  }
  .pipe li + li {
    border-left: 1px solid var(--rule-strong);
    border-top: 0;
  }
  .pipe li + li::before {
    content: "↓";
    left: 16px;
    top: -7px;
    transform: none;
  }
  .spec-grid,
  .compare {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 520px) {
  .doc-stats {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .spec div,
  .spec-wide div {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }
}