:root {
  --bg: #fff;
  --fg: #1a1a1a;
  --muted: #666;
  --line: #e3e3e3;
  --line-strong: #c8c8c8;
  --accent: #1a4f8b;
  --accent-bg: #eaf2fb;
  --warn: #b34a00;
  --row-hover: #f4f7fb;
  --code-bg: #f6f6f4;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg); }
body { font-size: 13px; line-height: 1.4; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: "SF Mono", Menlo, Consolas, monospace; }

header.bar {
  border-bottom: 1px solid var(--line-strong);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  background: #fafafa;
  position: sticky; top: 0; z-index: 5;
}
header.bar h1 { font-size: 14px; margin: 0; font-weight: 600; }
header.bar .meta { color: var(--muted); font-size: 12px; }
header.bar nav { margin-left: auto; display: flex; gap: 12px; align-items: center; }
header.bar nav button { font: inherit; background: none; border: 1px solid var(--line-strong); padding: 4px 10px; border-radius: 4px; cursor: pointer; }
header.bar nav button:hover { background: var(--accent-bg); }

main { padding: 12px 16px 32px; }

/* Filters bar */
.filters {
  display: flex; flex-wrap: wrap; gap: 10px 16px;
  padding: 8px 0 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
  font-size: 12px;
}
.filters label { display: flex; flex-direction: column; gap: 2px; color: var(--muted); }
.filters input, .filters select {
  font: inherit; padding: 3px 6px; border: 1px solid var(--line-strong); border-radius: 3px; background: #fff;
}
.filters .stats { margin-left: auto; align-self: end; color: var(--muted); }

/* Virtualized table */
.table-wrap {
  border: 1px solid var(--line);
  position: relative;
}
.thead {
  display: grid;
  grid-template-columns: var(--cols);
  border-bottom: 1px solid var(--line-strong);
  background: #f7f7f5;
  font-weight: 600;
  font-size: 12px;
}
.thead .th { padding: 6px 8px; cursor: pointer; user-select: none; border-right: 1px solid var(--line); }
.thead .th:last-child { border-right: 0; }
.thead .th:hover { background: var(--accent-bg); }
.thead .th .arrow { color: var(--muted); margin-left: 4px; font-size: 10px; }

.viewport {
  position: relative;
  height: 70vh;
  overflow: auto;
}
.spacer { width: 1px; }
.rows { position: absolute; top: 0; left: 0; right: 0; }
.row {
  display: grid;
  grid-template-columns: var(--cols);
  height: 26px; line-height: 26px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}
.row:hover { background: var(--row-hover); }
.row .cell { padding: 0 8px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; border-right: 1px solid var(--line); }
.row .cell:last-child { border-right: 0; }
.cell.num { text-align: right; font-variant-numeric: tabular-nums; }
.cell.tok { font-family: "SF Mono", Menlo, Consolas, monospace; background: var(--code-bg); }
.cell.lifecycle { font-size: 11px; }
.lc-init { color: #555; }
.lc-pre-transition { color: #806000; }
.lc-step1000-emergent { color: #1a4f8b; font-weight: 600; }
.lc-mid-emergent { color: #4a1a8b; }
.lc-late-emergent { color: #8b1a4a; }
.lc-persistent { color: #1a8b4a; }
.lc-other { color: var(--muted); }

/* Feature detail view */
.feature-view { max-width: 1100px; }
.feature-header {
  display: flex; align-items: baseline; gap: 16px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 8px; margin-bottom: 12px;
}
.feature-header h2 { margin: 0; font-size: 18px; }
.feature-header .lifecycle { font-size: 12px; padding: 2px 8px; border-radius: 10px; background: var(--accent-bg); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 8px 16px;
  margin-bottom: 16px;
}
.stat { padding: 6px 8px; background: #fafafa; border: 1px solid var(--line); border-radius: 3px; }
.stat .k { font-size: 11px; color: var(--muted); }
.stat .v { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 13px; }

.section { margin: 18px 0; }
.section h3 { font-size: 13px; margin: 0 0 6px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }

.trajectories { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.traj-card { border: 1px solid var(--line); border-radius: 4px; padding: 8px; background: #fff; }
.traj-card .title { font-size: 11px; color: var(--muted); margin-bottom: 4px; display: flex; justify-content: space-between; }
.traj-card svg { display: block; width: 100%; height: 90px; }
.traj-card svg .axis { stroke: var(--line); stroke-width: 1; }
.traj-card svg .line { fill: none; stroke: var(--accent); stroke-width: 1.5; }
.traj-card svg .dot { fill: var(--accent); }
.traj-card svg .marker { stroke: var(--warn); stroke-width: 1; stroke-dasharray: 2 2; }
.traj-card svg .band { fill: rgba(255, 200, 60, 0.18); }
.traj-card svg .tstep { stroke: #b89400; stroke-width: 1; stroke-dasharray: 3 3; }
.traj-card svg text { font-size: 9px; fill: var(--muted); }
.traj-card svg text.tlabel { fill: #8a6d00; }
.section h3 .legend { font-size: 10px; font-weight: normal; color: var(--muted); margin-left: 8px; text-transform: none; letter-spacing: 0; }

/* Concept badges */
.concept-badges { display: flex; flex-wrap: wrap; gap: 6px; }
.cbadge { display: inline-flex; gap: 4px; align-items: baseline;
  padding: 3px 8px; border: 1px solid var(--line-strong); border-radius: 12px;
  background: #fbfaf3; cursor: pointer; font-size: 12px; }
.cbadge:hover { background: var(--accent-bg); border-color: var(--accent); }
.cbadge .hits { color: var(--muted); font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 10px; }

/* Step-1000 delta column color cue */
.row .cell.delta.pos { color: #1a7a3a; }
.row .cell.delta.neg { color: #b03030; }
.row .cell.concept { font-size: 11px; color: #555; }
.row .cell.concept.empty { color: var(--muted); }

.tokens-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.tokens-card { border: 1px solid var(--line); border-radius: 4px; }
.tokens-card.random-baseline { border-style: dashed; opacity: 0.85; }
.tokens-card.random-baseline .head { background: #fef6e8; color: #8a6d00; font-style: italic; }
.tokens-card .head { padding: 6px 8px; border-bottom: 1px solid var(--line); background: #fafafa; font-size: 11px; color: var(--muted); }
.tokens-card table { width: 100%; border-collapse: collapse; font-size: 12px; }
.tokens-card td { padding: 2px 8px; border-bottom: 1px solid #f0f0f0; }
.tokens-card td.tok { font-family: "SF Mono", Menlo, Consolas, monospace; background: var(--code-bg); white-space: pre; }
.tokens-card td.logit { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }

.neighbors { display: flex; flex-wrap: wrap; gap: 6px; }
.neighbor { padding: 3px 8px; border: 1px solid var(--line-strong); border-radius: 3px; cursor: pointer; font-size: 12px; }
.neighbor:hover { background: var(--accent-bg); }
.neighbor .sim { color: var(--muted); margin-left: 6px; font-size: 11px; }
.neighbor .top1 { color: var(--muted); margin-left: 6px; font-family: "SF Mono", Menlo, Consolas, monospace; }

.hidden { display: none !important; }
.loading { padding: 18px; color: var(--muted); }

/* Snippets */
.snip-grid { display: grid; grid-template-columns: 1fr; gap: 8px; }
.snip-card { border: 1px solid var(--line); border-radius: 4px; padding: 8px 10px; background: #fff; }
.snip-head { font-size: 11px; color: var(--muted); margin-bottom: 4px; display: flex; justify-content: space-between; }
.snip-head .snip-score { font-family: "SF Mono", Menlo, Consolas, monospace; }
.snip-text {
  margin: 0;
  white-space: pre-wrap;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.55;
  word-break: break-word;
}
.snip-text .snip-peak { outline: 2px solid #b34a00; outline-offset: -1px; }
.snip-empty { padding: 12px; font-size: 12px; color: var(--muted); background: #fafafa; border: 1px dashed var(--line-strong); border-radius: 4px; }
.snip-help { margin: 4px 0 8px; font-size: 12px; color: var(--muted); }
.snip-help summary { cursor: pointer; user-select: none; padding: 2px 0; }
.snip-help summary:hover { color: var(--accent); }
.snip-help p { margin: 6px 0; max-width: 760px; line-height: 1.5; }
.snip-help code { font-family: "SF Mono", Menlo, Consolas, monospace; background: var(--code-bg); padding: 0 4px; border-radius: 2px; }

/* Examples tab */
.examples-view { max-width: 1100px; }
.examples-intro h1 { font-size: 18px; margin: 4px 0 6px; }
.examples-intro p { color: var(--muted); margin: 0 0 14px; max-width: 720px; }
.ex-group { margin: 22px 0; }
.ex-group h2 { font-size: 14px; margin: 0 0 4px; border-bottom: 1px solid var(--line); padding-bottom: 4px; }
.ex-note { color: var(--muted); margin: 4px 0 10px; font-size: 12px; max-width: 720px; }
.ex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 8px; }
.ex-card {
  display: block; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 4px; background: #fff;
  text-decoration: none; color: inherit;
}
.ex-card:hover { border-color: var(--accent); background: var(--accent-bg); text-decoration: none; }
.ex-head { display: flex; gap: 8px; align-items: baseline; margin-bottom: 2px; }
.ex-id { font-family: "SF Mono", Menlo, Consolas, monospace; color: var(--accent); font-weight: 600; }
.ex-cap { font-weight: 500; }
.ex-meta { font-size: 11px; color: var(--muted); display: block; margin-bottom: 4px; }
.ex-meta code { font-family: "SF Mono", Menlo, Consolas, monospace; background: var(--code-bg); padding: 0 4px; border-radius: 2px; }
.ex-toks { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12px; background: var(--code-bg); padding: 4px 6px; border-radius: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ex-detail { font-size: 11px; color: var(--muted); margin-top: 6px; line-height: 1.4; }