:root {
  --bg: #fafaf8;
  --fg: #1d1d1f;
  --muted: #6b6b70;
  --line: #e2e2e0;
  --card: #fff;
  --accent: #3a5bd9;
  --warn: #b45309;
  --warn-bg: #fef3c7;
  --override: #6d28d9;
  --override-bg: #ede9fe;
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 1100px;
  padding: 0 16px 32px;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--fg);
  background: var(--bg);
}

h1 { font-size: 1.4rem; margin: 20px 0 4px; }
.sub, .muted { color: var(--muted); }
.sub { margin: 0 0 12px; }
a { color: var(--accent); }

#tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
}
#tabs button {
  flex: 0 0 auto;
  border: 0;
  background: none;
  padding: 10px 14px;
  font: inherit;
  color: var(--muted);
  border-bottom: 3px solid transparent;
  cursor: pointer;
}
#tabs button[aria-selected="true"] {
  color: var(--fg);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

#question-text { font-size: 1.05rem; font-weight: 500; margin: 14px 0 2px; }
#question-stats { margin: 0 0 8px; font-size: 0.9rem; }

#chart-wrap { position: relative; }
#chart svg { display: block; width: 100%; height: auto; overflow: visible; }

.axis text { fill: var(--muted); font-size: 11px; }
.axis path, .axis line { stroke: #c9c9c6; }
.band-label { font-size: 12px; font-weight: 600; fill: var(--muted); }
.gridline { stroke: var(--line); }
.zero-line { stroke: #bdbdb9; stroke-dasharray: 3 3; }

.dot { cursor: pointer; stroke: #fff; stroke-width: 1.5; }
.dot:focus { outline: none; }
.dot.selected, .dot:focus-visible { stroke: var(--fg); stroke-width: 2.5; }
.dot-flag { fill: none; stroke: var(--warn); stroke-width: 1.5; stroke-dasharray: 2 2; pointer-events: none; }
.dot-override { fill: none; stroke: var(--override); stroke-width: 2; pointer-events: none; }

.edge { fill: none; stroke-width: 1.5; opacity: 0.45; pointer-events: none; }
.edge.dim { opacity: 0.08; }
.edge.hi { opacity: 0.95; stroke-width: 2.2; }
.edge.replicates { stroke: #15803d; }
.edge.critiques { stroke: #dc2626; stroke-dasharray: 6 4; }
.edge.extends { stroke: #64748b; stroke-dasharray: 1.5 3; }

#tooltip {
  position: absolute;
  pointer-events: none;
  max-width: 260px;
  background: rgba(29, 29, 31, 0.92);
  color: #fff;
  font-size: 12px;
  padding: 6px 8px;
  border-radius: 6px;
}

#legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 8px 0 16px;
  font-size: 12px;
}
#legend .group { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; }
#legend .group-title { font-weight: 600; color: var(--muted); margin-right: 2px; }
#legend .item { display: inline-flex; align-items: center; gap: 4px; }
#legend svg { overflow: visible; }

#detail {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
}
#detail h2 { font-size: 1.15rem; margin: 0 0 4px; line-height: 1.3; }
#detail .meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 10px; }
#detail dl { display: grid; grid-template-columns: 150px 1fr; gap: 6px 14px; margin: 12px 0 0; }
#detail dt { font-weight: 600; color: var(--muted); font-size: 0.85rem; }
#detail dd { margin: 0; }
#detail ul { margin: 0; padding-left: 18px; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; }
.chip { background: #f0f0ee; border-radius: 999px; padding: 1px 8px; font-size: 0.82rem; }

.badges { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.badge { font-size: 0.8rem; font-weight: 600; padding: 2px 8px; border-radius: 6px; }
.badge.flag { color: var(--warn); background: var(--warn-bg); }
.badge.override { color: var(--override); background: var(--override-bg); }
.badge.stance { background: #eef2ff; color: var(--accent); }

.rel-link { background: none; border: 0; padding: 0; color: var(--accent); cursor: pointer; font: inherit; text-align: left; text-decoration: underline; }

footer { margin-top: 20px; font-size: 0.82rem; }

@media (max-width: 640px) {
  body { padding: 0 10px 24px; font-size: 14px; }
  h1 { font-size: 1.2rem; }
  #tabs button { padding: 8px 10px; }
  #detail { padding: 12px; }
  #detail dl { grid-template-columns: 1fr; gap: 2px; }
  #detail dd { margin-bottom: 8px; }
}

.arrow.replicates { fill: #15803d; }
.arrow.critiques { fill: #dc2626; }
.arrow.extends { fill: #64748b; }