:root {
  --blue: #4575b4;
  --red: #d6604d;
  --gray-50: #fafafa;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --bg: #ffffff;
  --fg: #111827;
  --accent: #2563eb;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg);
}

header {
  padding: 24px 32px 16px;
  border-bottom: 1px solid var(--gray-200);
}
header h1 { margin: 0 0 4px; font-size: 22px; }
header .lede { margin: 0; color: var(--gray-700); }

.prompt { margin-top: 12px; max-width: 70ch; }
.prompt summary { cursor: pointer; color: var(--accent); font-size: 13px; }
.prompt blockquote {
  margin: 8px 0 4px;
  padding: 10px 14px;
  background: var(--gray-50);
  border-left: 3px solid var(--gray-300);
  font-size: 14px;
  white-space: pre-wrap;
}
.ablation-note { font-size: 12px; color: var(--gray-500); margin: 0; }

main {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 20px 32px 60px;
  max-width: 1400px;
  margin: 0 auto;
}

#filters { position: sticky; top: 16px; align-self: flex-start; }
#filters h2 { margin: 0 0 12px; font-size: 14px; text-transform: uppercase; letter-spacing: .04em; color: var(--gray-500); }
.filter-group { margin-bottom: 18px; }
.filter-group label {
  display: block; font-size: 12px; font-weight: 600;
  color: var(--gray-500); margin-bottom: 6px; text-transform: uppercase;
}
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; }
.pill-grid { max-height: 380px; overflow-y: auto; padding-right: 4px; }
.pill {
  font-size: 13px;
  border: 1px solid var(--gray-300);
  background: white;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background .1s, border-color .1s, color .1s;
}
.pill:hover { background: var(--gray-100); }
.pill.active { background: var(--gray-900); color: white; border-color: var(--gray-900); }
.pill.choice-blue.active { background: var(--blue); border-color: var(--blue); }
.pill.choice-red.active { background: var(--red); border-color: var(--red); }

#reset-filters {
  font-size: 12px; padding: 6px 10px; background: white;
  border: 1px solid var(--gray-300); border-radius: 6px; cursor: pointer;
}
#reset-filters:hover { background: var(--gray-100); }

.counts { margin-top: 20px; font-size: 12px; color: var(--gray-500); }

#results { min-height: 400px; }
#trial-list { display: flex; flex-direction: column; gap: 6px; }

.trial-row {
  display: grid;
  grid-template-columns: 1fr 90px 70px 60px 80px;
  gap: 12px;
  padding: 10px 12px;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color .1s, background .1s;
  align-items: center;
  font-size: 14px;
}
.trial-row:hover { border-color: var(--gray-500); background: var(--gray-50); }
.trial-row .model { font-weight: 600; }
.trial-row .mode { font-size: 12px; color: var(--gray-500); font-variant: small-caps; }
.trial-row .trial-num { color: var(--gray-500); font-variant: tabular-nums; font-size: 13px; }
.trial-row .elapsed { color: var(--gray-500); font-size: 12px; font-variant: tabular-nums; text-align: right; }
.choice-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  color: white;
  text-align: center;
}
.choice-badge.BLUE { background: var(--blue); }
.choice-badge.RED { background: var(--red); }
.choice-badge.UNCLEAR { background: var(--gray-500); }
.choice-badge.ERROR { background: #92400e; }

.empty { text-align: center; color: var(--gray-500); padding: 60px 20px; font-size: 14px; }

dialog#trial-modal {
  max-width: 900px;
  width: 92vw;
  max-height: 90vh;
  border: 1px solid var(--gray-300);
  border-radius: 10px;
  padding: 0;
  overflow: hidden;
}
dialog#trial-modal::backdrop { background: rgba(0,0,0,0.4); }
#trial-detail {
  padding: 22px 24px 12px;
  overflow-y: auto;
  max-height: calc(90vh - 60px);
}
#trial-detail h2 { margin: 0 0 4px; font-size: 18px; }
#trial-detail .meta { color: var(--gray-500); font-size: 13px; margin-bottom: 16px; }
#trial-detail .meta .choice-badge { vertical-align: middle; margin-left: 8px; }
#trial-detail h3 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--gray-500); margin: 18px 0 6px;
}
#trial-detail pre {
  white-space: pre-wrap; word-wrap: break-word;
  background: var(--gray-50); padding: 12px 14px; border-radius: 6px;
  border: 1px solid var(--gray-200);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  margin: 0;
}
#trial-detail .reasoning pre { background: #fff7ed; border-color: #fed7aa; }
#trial-detail .empty-section { color: var(--gray-500); font-size: 13px; font-style: italic; }
#close-modal {
  position: absolute; top: 14px; right: 18px;
  border: 1px solid var(--gray-300); background: white;
  padding: 4px 10px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
#close-modal:hover { background: var(--gray-100); }

@media (max-width: 800px) {
  main { grid-template-columns: 1fr; }
  #filters { position: static; }
  .trial-row { grid-template-columns: 1fr 70px 60px; }
  .trial-row .mode, .trial-row .elapsed { display: none; }
}