:root {
  --fg: #111;
  --bg: #fafafa;
  --card: #fff;
  --border: #e5e5e5;
  --muted: #666;
  /* wasmCloud brand green — used for links + active tab + small accents.
     Chart line colors (p2/p3) intentionally stay distinct (cyan/purple)
     so they keep their meaning across charts. */
  --brand: #00bc8e;
  --brand-soft: rgba(0, 188, 142, 0.15);
  --link: var(--brand);
  --p2: #06b6d4;
  --p2-band: rgba(6, 182, 212, 0.15);
  --p3: #a855f7;
  --p3-band: rgba(168, 85, 247, 0.15);
  --grid: rgba(0, 0, 0, 0.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e5e5e5;
    --bg: #0a0a0a;
    --card: #141414;
    --border: #262626;
    --muted: #888;
    /* Brand stays the same hex in dark mode — it's brand-fixed, not theme. */
    --brand-soft: rgba(0, 188, 142, 0.20);
    --grid: rgba(255, 255, 255, 0.07);
    --p2-band: rgba(6, 182, 212, 0.20);
    --p3-band: rgba(168, 85, 247, 0.20);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

code, .mono {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  border-bottom: 1px solid var(--border);
  padding: 2rem clamp(1rem, 4vw, 3rem);
}
header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2rem);
  letter-spacing: -0.02em;
}
header .lede {
  margin: 1rem 0 0;
  color: var(--muted);
}

/* Brand block: logo + title stack */
.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.brand-link { display: inline-flex; }
.brand-link:hover .logo { transform: scale(1.05); }
.brand .logo {
  width: 2.5rem;
  height: auto;
  flex-shrink: 0;
  transition: transform 120ms ease;
}
.brand-text { display: flex; flex-direction: column; gap: 0.2rem; min-width: 0; }
.brand-text .kicker {
  margin: 0;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand);
  font-weight: 500;
}
@media (max-width: 480px) {
  .brand .logo { width: 2rem; }
  .brand-text .kicker { font-size: 0.75rem; letter-spacing: 0.06em; }
}
.meta {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.meta .sep { margin: 0 0.5rem; opacity: 0.5; }

.controls {
  margin-top: 1.25rem;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}
.controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
}
.controls select {
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
  font-family: inherit;
  font-size: inherit;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 4vw, 3rem);
}

.bench-section { margin-bottom: 2.5rem; }
.bench-section > h2 {
  font-family: ui-monospace, monospace;
  font-size: 1.05rem;
  margin: 0 0 1rem 0;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-weight: 500;
}

.chart-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem 1.25rem;
  margin-bottom: 1rem;
}
.chart-card header {
  border: 0;
  padding: 0 0 0.75rem 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.chart-card h3 {
  margin: 0;
  font-family: ui-monospace, monospace;
  font-size: 1rem;
  font-weight: 500;
}
.latest {
  display: flex;
  gap: 1rem;
  font-size: 0.88rem;
  color: var(--muted);
  font-family: ui-monospace, monospace;
}
.latest .swatch {
  display: inline-block;
  width: 0.7em;
  height: 0.7em;
  border-radius: 2px;
  margin-right: 0.4em;
  vertical-align: middle;
}
.latest .delta {
  margin-left: 0.4em;
  font-size: 0.85em;
}
.delta.regress, .num.regress, td.regress { color: #d4574e; }
.delta.improve, .num.improve, td.improve { color: #2ea043; }
.metric-hint {
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--muted);
  margin-left: 0.5em;
}

/* tabs nav (header) */
nav.tabs {
  display: flex;
  gap: 1.25rem;
  margin: 1rem 0 0.5rem;
  border-bottom: 1px solid var(--border);
}
nav.tabs a {
  padding: 0.4rem 0;
  margin-bottom: -1px;
  color: var(--muted);
  border-bottom: 2px solid transparent;
}
nav.tabs a:hover { color: var(--fg); text-decoration: none; }
nav.tabs a.active {
  color: var(--fg);
  border-bottom-color: var(--link);
}

/* compare-view: page title (smaller, dimmer suffix on the h1) */
.page-title {
  font-size: 0.65em;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0;
}

/* compare-view: run summary cards */
.run-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
@media (max-width: 600px) {
  .run-summary { grid-template-columns: 1fr; }
}
.run-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
}
.run-card h3 {
  margin: 0 0 0.4rem 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 500;
}
.run-card.a h3 { color: var(--p2); }
.run-card.b h3 { color: var(--p3); }
.run-card .run-id { font-family: ui-monospace, monospace; font-size: 1.05rem; }
.run-card .run-meta {
  font-family: ui-monospace, monospace;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

/* compare-view: tally + diff table */
.tally {
  display: flex;
  gap: 1rem;
  margin: 0 0 1rem;
  font-size: 0.9rem;
  font-family: ui-monospace, monospace;
  color: var(--muted);
}
.tally-item.regress { color: #d4574e; }
.tally-item.improve { color: #2ea043; }
.tally-item.flat    { color: var(--muted); }

table.diff {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
table.diff th {
  text-align: left;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
}
table.diff th.num,
table.diff td.num {
  text-align: right;
  font-family: ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
table.diff td {
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--border);
}
table.diff tbody tr:last-child td { border-bottom: 0; }
table.diff td.mono { font-family: ui-monospace, monospace; }
table.diff tr.row-regress { background: rgba(212, 87, 78, 0.06); }
table.diff tr.row-improve { background: rgba(46, 160, 67, 0.06); }

.muted { color: var(--muted); }

.sig-badge {
  display: inline-block;
  width: 1em;
  text-align: center;
}
.sig-badge.flat { color: var(--muted); }

/* swap button on compare controls */
#swap-btn {
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  align-self: end;
}
#swap-btn:hover { border-color: var(--muted); }

.chart-wrapper {
  position: relative;
  height: 260px;
}
@media (max-width: 600px) {
  .chart-wrapper { height: 220px; }
}

.empty, .error {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
}
.error { color: #d4574e; }

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem clamp(1rem, 4vw, 3rem);
  color: var(--muted);
  font-size: 0.85rem;
}
footer p { margin: 0; }