css/styles.css

/* css/styles.css — layout + colour tokens.
 *
 * Contrast targets (WCAG AA, 4.5:1):
 *   --fg #1a1f2c  on --bg #fafbfc  → 14.5:1
 *   --fg-muted #4a5063 on --bg     → 7.4:1
 *   --accent #2456c9 on --bg       → 6.8:1
 */

* { box-sizing: border-box; }

:root {
  --bg: #fafbfc;
  --bg-elev: #ffffff;
  --fg: #1a1f2c;
  --fg-muted: #4a5063;
  --border: #d6dae3;
  --accent: #2456c9;
  --accent-fg: #ffffff;
  --chip-bg: #eef0f5;
  --chip-on-bg: #d8e2f7;
  --chip-on-fg: #102a66;
  --shadow: 0 1px 2px rgba(20, 25, 40, 0.06), 0 4px 12px rgba(20, 25, 40, 0.04);
  --radius: 10px;
  --radius-sm: 6px;
  --gap: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11141b;
    --bg-elev: #1a1e28;
    --fg: #f0f2f6;
    --fg-muted: #b5bcc9;
    --border: #2c3140;
    --accent: #6f9bff;
    --accent-fg: #0b1224;
    --chip-bg: #232838;
    --chip-on-bg: #2c4a8a;
    --chip-on-fg: #e0e9ff;
  }
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--gap);
  margin-bottom: 18px;
  flex-wrap: wrap;
}
header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
#engine-label {
  font-size: 13px;
  color: var(--fg-muted);
}

.search-row {
  display: flex;
  gap: var(--gap);
  margin-bottom: 14px;
  flex-wrap: wrap;
}
#query {
  flex: 1 1 360px;
  min-width: 0;
  font: inherit;
  padding: 11px 14px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
#query:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}
#query:disabled {
  opacity: 0.6;
  cursor: progress;
}
#topk, #model-select {
  font: inherit;
  padding: 11px 14px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  border-radius: var(--radius);
  cursor: pointer;
}
#topk:focus, #model-select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
#model-select { flex: 1 1 260px; min-width: 0; }
#model-select option:disabled { color: var(--fg-muted); }

#quality-panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
#quality-panel > summary {
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 14px;
  user-select: none;
  list-style: none;
}
#quality-panel > summary::-webkit-details-marker { display: none; }
#quality-panel > summary::before {
  content: "▸ ";
  font-size: 11px;
  color: var(--fg-muted);
  transition: transform 120ms ease;
  display: inline-block;
}
#quality-panel[open] > summary::before { transform: rotate(90deg); }
.quality-body { padding: 0 16px 16px; }
#model-blurb {
  font-size: 13px;
  color: var(--fg-muted);
  margin: 0 0 14px;
  line-height: 1.55;
}
.quality-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}
.quality-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background: var(--bg);
}
.quality-card-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  font-weight: 600;
}
.quality-card-value {
  font-size: 20px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  margin: 2px 0 1px;
  color: var(--accent);
}
.quality-card-sub {
  font-size: 11px;
  color: var(--fg-muted);
  line-height: 1.4;
}
.leaderboard-details > summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--fg-muted);
  padding: 6px 0;
  list-style: none;
  user-select: none;
}
.leaderboard-details > summary::-webkit-details-marker { display: none; }
.leaderboard-details > summary::before {
  content: "▸ ";
  font-size: 10px;
  display: inline-block;
  transition: transform 120ms ease;
}
.leaderboard-details[open] > summary::before { transform: rotate(90deg); }
table.leaderboard {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  margin: 8px 0;
}
table.leaderboard th, table.leaderboard td {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
table.leaderboard th { color: var(--fg-muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; }
table.leaderboard td:nth-child(3), table.leaderboard td:nth-child(4),
table.leaderboard th:nth-child(3), table.leaderboard th:nth-child(4) { text-align: right; width: 80px; }
table.leaderboard tr.active { background: var(--chip-on-bg); color: var(--chip-on-fg); font-weight: 500; }
.leaderboard-foot {
  font-size: 11px;
  color: var(--fg-muted);
  margin: 8px 0 0;
}
.leaderboard-foot a { color: var(--accent); text-decoration: none; }
.leaderboard-foot a:hover { text-decoration: underline; }

#libraries {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  background: var(--chip-bg);
  color: var(--fg);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  border: 1px solid transparent;
  transition: background 80ms ease, border-color 80ms ease;
}
.chip:hover { border-color: var(--border); }
.chip input[type="checkbox"] { position: absolute; opacity: 0; pointer-events: none; }
.chip:has(input:checked) {
  background: var(--chip-on-bg);
  color: var(--chip-on-fg);
}
.chip:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.chip-count { color: var(--fg-muted); font-variant-numeric: tabular-nums; font-size: 12px; }
.chip:has(input:checked) .chip-count { color: inherit; opacity: 0.8; }
.chip-disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: not-allowed;
}

#status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap);
  margin-bottom: 14px;
  min-height: 20px;
}
#status { color: var(--fg-muted); font-size: 13px; }
#status.error { color: #c01717; }
@media (prefers-color-scheme: dark) {
  #status.error { color: #ff8a8a; }
}

#progress {
  width: 100%;
  height: 4px;
  background: var(--chip-bg);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 14px;
}
#progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 120ms ease;
}

#empty-state {
  padding: 40px 0;
  text-align: center;
  color: var(--fg-muted);
  font-size: 14px;
}

#results {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.result {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow);
  transition: transform 80ms ease, border-color 80ms ease;
}
.result:focus, .result:hover {
  border-color: var(--accent);
  outline: none;
  transform: translateY(-1px);
}
.result-svg {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 64px;
  color: var(--fg);
}
.result-svg svg { width: 40px; height: 40px; }
.result-name {
  font-weight: 500;
  font-size: 14px;
  word-break: break-word;
}
.result-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}
.result-lib { font-weight: 500; }
.result-score { color: var(--accent); }

footer {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover, footer a:focus { text-decoration: underline; }