:root {
  --bg: #0f1117;
  --bg-card: #181b24;
  --bg-section: #13161f;
  --border: #2a2d3a;
  --text: #e8eaf0;
  --text-muted: #6b7280;
  --text-dim: #9ca3af;
  --accent: #6366f1;
  --accent-light: #818cf8;

  --c-skipped:   #4b5563;
  --c-filtered:  #f97316;
  --c-candidate: #3b82f6;
  --c-winner:    #22c55e;
  --c-winner-bg: rgba(34, 197, 94, 0.07);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Topbar ── */
.topbar {
  padding: 24px 40px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 28px;
  flex-shrink: 0;
}
.back-btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  padding-top: 4px;
  transition: color 0.15s;
}
.back-btn:hover { color: var(--accent-light); }
.title-wrap h1 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.03em; }
.title-wrap p  { margin-top: 5px; color: var(--text-muted); font-size: 0.9rem; max-width: 640px; }
.title-wrap p em { color: var(--accent-light); font-style: normal; font-weight: 600; }

/* ── Layout ── */
.layout {
  display: flex;
  gap: 0;
  min-height: calc(100vh - 90px);
}

.sidebar-panel {
  width: 280px;
  min-width: 280px;
  border-right: 1px solid var(--border);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.viz-panel {
  flex: 1;
  min-width: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── Sidebar ── */
.sidebar-section { display: flex; flex-direction: column; gap: 8px; }
.sidebar-section h3 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.sidebar-section p {
  font-size: 0.8125rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.config-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  padding: 5px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
}
.config-row strong { color: var(--accent-light); font-variant-numeric: tabular-nums; }

.regen-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: opacity 0.15s;
}
.regen-btn:hover { opacity: 0.85; }

.legend-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.legend-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Viz sections ── */
.viz-section {
  border-bottom: 1px solid var(--border);
  padding: 28px 32px;
}
.section-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}
.section-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}
.section-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.section-header p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── HTML Tree ── */
.tree-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}
.tree-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.tree-btn:hover { color: var(--text); border-color: var(--text-muted); }

.tree-root { font-size: 0.8rem; font-family: monospace; }
.tree-node { }
.tree-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 4px;
  border-radius: 4px;
  cursor: default;
  transition: background 0.1s;
  user-select: none;
}
.tree-row:hover { background: var(--bg-card); }
.tree-toggle {
  width: 16px; height: 16px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 0.65rem;
  cursor: pointer;
  flex-shrink: 0;
}
.tree-tag {
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  border: 1px solid transparent;
}
.tree-cls { color: var(--text-muted); font-size: 0.72rem; }
.tree-status-badge {
  font-size: 0.65rem;
  padding: 1px 7px;
  border-radius: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-left: 4px;
}

/* Status colors for tree tags */
.status-skipped   .tree-tag { background: rgba(75,85,99,0.2);  border-color: rgba(75,85,99,0.4);  color: var(--c-skipped);  }
.status-filtered  .tree-tag { background: rgba(249,115,22,0.15); border-color: rgba(249,115,22,0.4); color: var(--c-filtered); }
.status-candidate .tree-tag { background: rgba(59,130,246,0.15); border-color: rgba(59,130,246,0.4); color: var(--c-candidate); }
.status-winner    .tree-tag { background: rgba(34,197,94,0.15);  border-color: rgba(34,197,94,0.4);  color: var(--c-winner);   }
.status-default   .tree-tag { background: rgba(156,163,175,0.1); border-color: rgba(156,163,175,0.3); color: var(--text-dim);  }

.status-winner    .tree-status-badge { background: rgba(34,197,94,0.2);  color: var(--c-winner);   border: 1px solid rgba(34,197,94,0.4); }
.status-candidate .tree-status-badge { background: rgba(59,130,246,0.2); color: var(--c-candidate); border: 1px solid rgba(59,130,246,0.4); }
.status-filtered  .tree-status-badge { background: rgba(249,115,22,0.2); color: var(--c-filtered); border: 1px solid rgba(249,115,22,0.4); }
.status-skipped   .tree-status-badge { background: rgba(75,85,99,0.2);  color: var(--c-skipped);  border: 1px solid rgba(75,85,99,0.4); }

.tree-children { margin-left: 20px; border-left: 1px dashed var(--border); padding-left: 8px; }
.tree-children.collapsed { display: none; }

/* ── Dot Plot ── */
.dot-plot-wrap {
  overflow-x: auto;
  background: var(--bg-card);
  border-radius: 10px;
  padding: 16px;
  border: 1px solid var(--border);
}
.dot-plot-wrap svg { display: block; width: 100%; }
.plot-legend {
  display: flex;
  gap: 20px;
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.plot-legend span { display: flex; align-items: center; gap: 6px; }

/* ── Score Table ── */
.score-table-wrap { overflow-x: auto; }
.score-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}
.score-table th, .score-table td {
  padding: 9px 14px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
.score-table th {
  text-align: right;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-card);
  font-weight: 700;
}
.score-table th:first-child,
.score-table td:first-child { text-align: left; }
.score-table tbody tr:hover { background: var(--bg-card); }
.score-table .cell-winner {
  color: var(--c-winner);
  font-weight: 700;
}
.score-table .cell-winner::after { content: ' ★'; }
.score-table .row-total td {
  font-weight: 700;
  border-top: 2px solid var(--border);
  color: var(--text);
}
.score-table .col-winner { background: rgba(34,197,94,0.05); }

/* ── Extracted Cards ── */
.extracted-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.extracted-header h3 {
  font-size: 1rem;
  font-weight: 700;
}
.winner-badge {
  background: rgba(34,197,94,0.15);
  border: 1px solid rgba(34,197,94,0.4);
  color: var(--c-winner);
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}
.listing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.listing-card .car-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
}
.listing-card .car-price {
  font-size: 1rem;
  font-weight: 800;
  color: var(--c-winner);
  font-variant-numeric: tabular-nums;
}
.listing-card .car-detail {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.listing-card .car-desc {
  font-size: 0.775rem;
  color: var(--text-dim);
  line-height: 1.5;
  border-top: 1px solid var(--border);
  padding-top: 6px;
  margin-top: 2px;
}
.listing-card .meta-len {
  font-size: 0.7rem;
  color: var(--accent-light);
  font-variant-numeric: tabular-nums;
}