:root {
  color-scheme: light dark;
  --bg: #fbfbfd;
  --bg-elevated: #ffffff;
  --fg: #16161a;
  --fg-muted: #5b5b66;
  --border: #e2e2e8;
  --border-strong: #c9c9d2;
  --accent: #3b5bdb;
  --accent-soft: #eef1fd;
  --better: #17794a;
  --better-soft: #e6f4ec;
  --worse: #a12b2b;
  --worse-soft: #fbeaea;
  --flat: #5b5b66;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e11;
    --bg-elevated: #17171c;
    --fg: #f2f2f5;
    --fg-muted: #a1a1ad;
    --border: #2a2a33;
    --border-strong: #3a3a45;
    --accent: #8fa4ff;
    --accent-soft: #1b1f33;
    --better: #56cc8c;
    --better-soft: #12251b;
    --worse: #ff8f8f;
    --worse-soft: #2a1516;
    --flat: #a1a1ad;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius) 0;
  z-index: 10;
}

.skip-link:focus {
  left: 0;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration-thickness: 2px;
}

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.05em 0.35em;
}

/* ---------- header ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 1.75rem 0 0;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--fg-muted);
}

.site-header h1 {
  margin: 0.2rem 0 1rem;
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.2rem);
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  color: var(--fg-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--fg);
}

.nav-link-active {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

main {
  padding: 2rem 0 3rem;
}

/* ---------- preview banner ---------- */

.preview-banner {
  margin: 0;
  padding: 0.7rem 1.25rem;
  background: var(--worse-soft);
  color: var(--worse);
  border-bottom: 1px solid var(--border);
  text-align: center;
  font-size: 0.9rem;
}

/* ---------- intro + prose ---------- */

.lede {
  margin: 0 0 2rem;
  font-size: 1.05rem;
  color: var(--fg);
  max-width: 68ch;
}

.muted {
  color: var(--fg-muted);
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
}

.empty-note {
  color: var(--fg-muted);
  font-style: italic;
  margin: 0.75rem 0 0;
}

/* ---------- benchmark sections ---------- */

.benchmark {
  margin-bottom: 2.75rem;
}

.benchmark-head {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.benchmark-head h2 {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}

.stat {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 0.85rem 1.1rem;
  min-width: 15rem;
}

.stat-label {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--fg-muted);
}

.stat-value {
  margin: 0.15rem 0;
  font-size: 2rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.stat-value-empty {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--fg-muted);
}

.stat-sub {
  margin: 0;
  font-size: 0.8rem;
  color: var(--fg-muted);
}

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

.card {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.card-muted {
  background: transparent;
  border-style: dashed;
}

.card-head {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.card-head h3 {
  margin: 0;
  font-size: 1.02rem;
}

.provenance {
  margin: 0.9rem 0 0;
  font-size: 0.8rem;
  color: var(--fg-muted);
  word-break: break-word;
}

.empty h2,
.empty h1 {
  margin-top: 0;
}

.steps {
  margin: 0.75rem 0 1rem;
  padding-left: 1.25rem;
  color: var(--fg-muted);
}

.steps li {
  margin-bottom: 0.35rem;
}

/* ---------- charts ---------- */

.chart-figure {
  margin: 0 0 1rem;
}

.chart {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.chart-grid {
  stroke: var(--border);
  stroke-width: 1;
}

.chart-axis {
  fill: var(--fg-muted);
  font-size: 10px;
  font-family: var(--sans);
}

.chart-band {
  fill: var(--accent-soft);
  stroke: none;
}

.chart-line {
  fill: none;
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.chart-line-p50 {
  stroke: var(--accent);
}

.chart-line-p95 {
  stroke: var(--fg-muted);
  stroke-dasharray: 4 3;
}

.chart-dot {
  fill: var(--accent);
  stroke: var(--bg-elevated);
  stroke-width: 1.5;
}

.legend {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0.25rem 0 0;
  padding: 0;
  font-size: 0.8rem;
  color: var(--fg-muted);
}

.legend li {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-swatch {
  width: 14px;
  height: 3px;
  border-radius: 2px;
  display: inline-block;
}

.legend-swatch-p50 {
  background: var(--accent);
}

.legend-swatch-p95 {
  background: var(--fg-muted);
}

.spark {
  display: inline-block;
  width: 6.5rem;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  flex: none;
  margin-top: 0.35rem;
}

.spark-bar {
  display: block;
  height: 100%;
  width: var(--spark, 100%);
  border-radius: 999px;
}

.spark-bar-better {
  background: var(--better);
}

.spark-bar-worse {
  background: var(--worse);
}

.spark-bar-flat {
  background: var(--flat);
}

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

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

caption {
  text-align: left;
  padding: 0.6rem 0.75rem;
  color: var(--fg-muted);
  font-size: 0.82rem;
  border-bottom: 1px solid var(--border);
}

th,
td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

thead th {
  background: color-mix(in srgb, var(--bg-elevated) 92%, var(--fg) 8%);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  font-weight: 600;
}

tbody tr:last-child td {
  border-bottom: none;
}

.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.delta-better {
  color: var(--better);
  font-weight: 600;
}

.delta-worse {
  color: var(--worse);
  font-weight: 600;
}

.delta-flat,
.delta-none {
  color: var(--fg-muted);
}

.delta-abs {
  color: var(--fg-muted);
  font-weight: 400;
}

/* ---------- changelog ---------- */

.entry {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.1rem;
}

.entry-head h2 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.35;
}

.entry-meta {
  margin: 0.35rem 0 0;
  font-size: 0.83rem;
  color: var(--fg-muted);
}

.entry-message {
  margin: 0.6rem 0 0.85rem;
  font-size: 0.92rem;
  color: var(--fg);
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2.5rem;
  color: var(--fg-muted);
  font-size: 0.84rem;
}

.site-footer p {
  margin: 0 0 0.5rem;
  max-width: 78ch;
}

@media (max-width: 640px) {
  .wrap {
    width: min(1120px, 100% - 1.75rem);
  }

  .stat {
    min-width: 0;
    width: 100%;
  }
}

@media print {
  .nav,
  .skip-link {
    display: none;
  }
}