/* ============================================================
   RL·Trader LAB — interactive research laboratory
   Extends the tokens in styles.css; defines no new palette.
   Aesthetic: instrument panel. Dense and aligned, tabular
   numerals in the UI face, no decoration that isn't carrying
   information. Monospace is for code and receipts only.
   ============================================================ */

#view-lab { display: none; }
#view-lab.active { display: block; }

.lab-wrap { max-width: var(--maxw); margin: 0 auto; padding: 40px 24px 96px; }

/* ── Masthead ────────────────────────────────────────────── */
.lab-head {
  display: flex; flex-wrap: wrap; align-items: flex-end;
  justify-content: space-between; gap: 20px;
  padding-bottom: 24px; margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.lab-head h1 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700; letter-spacing: -0.02em; line-height: 1.05;
}
.lab-head .lab-sub { color: var(--muted); margin-top: 8px; max-width: 56ch; }

/* Backend status: a real readout, never decorative. */
.api-pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-data); font-size: 11px;
  padding: 7px 12px; border-radius: 999px;
  border: 1px solid var(--border-2); color: var(--muted);
  background: var(--surface); white-space: nowrap; font-variant-numeric: tabular-nums;
}
.api-pill .dot-led {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--faint); flex: none;
}
.api-pill.is-live { color: var(--pos); border-color: rgba(93, 242, 160, 0.4); }
.api-pill.is-live .dot-led { background: var(--pos); box-shadow: 0 0 8px var(--pos); }
.api-pill.is-down { color: var(--neg); border-color: rgba(255, 107, 107, 0.4); }
.api-pill.is-down .dot-led { background: var(--neg); }

/* ── Sub navigation ──────────────────────────────────────── */
.lab-tabs {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--border); margin-bottom: 28px;
  overflow-x: auto; scrollbar-width: none;
}
.lab-tabs::-webkit-scrollbar { display: none; }
.lab-tab-group { display: flex; flex-direction: column; flex: none; }
.lab-tab-group + .lab-tab-group { margin-left: 12px; padding-left: 12px; border-left: 1px solid var(--border); }
.lab-tab-group-label {
  padding: 0 16px; margin-bottom: -4px;
  font-size: 11px; font-weight: 500; color: var(--muted); opacity: .75;
  white-space: nowrap;
}
.lab-tab-row { display: flex; gap: 2px; }
.lab-tab-row .lab-tab { white-space: nowrap; }
.lab-tab {
  appearance: none; background: none; border: 0; cursor: pointer;
  font-family: var(--font-data); font-size: 12px; color: var(--muted);
  padding: 12px 16px; border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease; font-variant-numeric: tabular-nums;
}
.lab-tab:hover { color: var(--text); }
.lab-tab[aria-selected="true"] { color: var(--volt); border-bottom-color: var(--volt); }
.lab-tab:focus-visible { outline: 2px solid var(--cyan); outline-offset: -2px; }

/* ── Guided tour ─────────────────────────────────────────── */
.tour-start {
  appearance: none; background: none; border: 0; padding: 0; margin-top: 14px; cursor: pointer;
  font: inherit; font-size: 14px; font-weight: 600; color: var(--volt);
}
.tour-start:hover { text-decoration: underline; text-underline-offset: 3px; }
.tour-bar {
  display: flex; align-items: center; gap: 20px;
  margin: -12px 0 28px; padding: 16px 18px;
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--volt); border-radius: 12px;
}
.tour-bar[hidden] { display: none; }
.tour-copy { flex: 1; min-width: 0; }
.tour-step { display: block; font-size: 11px; color: var(--muted); margin-bottom: 2px; }
.tour-title { display: block; font-size: 16px; color: var(--text); }
.tour-text { margin: 4px 0 0; color: var(--muted); font-size: 14px; line-height: 1.5; max-width: 70ch; }
.tour-actions { display: flex; align-items: center; gap: 8px; flex: none; }
.tour-btn {
  appearance: none; cursor: pointer; font: inherit; font-size: 13px; font-weight: 600;
  padding: 8px 14px; border-radius: 999px; border: 0;
  background: var(--surface-2); color: var(--text);
}
.tour-btn[disabled] { opacity: .4; cursor: default; }
.tour-next { background: var(--volt); color: var(--on-volt); }
.tour-close {
  appearance: none; cursor: pointer; border: 0; background: none;
  color: var(--muted); font-size: 22px; line-height: 1; padding: 4px 6px;
}
.tour-close:hover { color: var(--text); }
@media (max-width: 640px) {
  .tour-bar { flex-direction: column; align-items: stretch; gap: 12px; }
  .tour-actions .tour-btn { flex: 1; }
}

.lab-panel { display: none; }
.lab-panel.active { display: block; }

/* ── Two-column instrument layout ────────────────────────── */
.lab-grid {
  display: grid; gap: 20px;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  align-items: start;
}
@media (max-width: 900px) { .lab-grid { grid-template-columns: 1fr; } }

.panel-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.panel-card + .panel-card { margin-top: 20px; }
.panel-card > h3 {
  font-family: var(--font-data); font-size: 11px;
  color: var(--cyan); margin-bottom: 16px; font-weight: 500; font-variant-numeric: tabular-nums;
}
.panel-note {
  font-size: 12.5px; color: var(--faint); line-height: 1.5;
  margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border);
}

/* ── Controls ────────────────────────────────────────────── */
.ctl { margin-bottom: 16px; }
.ctl:last-of-type { margin-bottom: 0; }
.ctl > label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--font-data); font-size: 11px;
  color: var(--muted); margin-bottom: 7px; font-variant-numeric: tabular-nums;
}
.ctl .ctl-val { color: var(--volt); font-size: 12px; letter-spacing: 0; }

.ctl select, .ctl input[type="text"], .ctl input[type="number"] {
  width: 100%; padding: 9px 11px;
  background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border-2); border-radius: 9px;
  font-family: var(--font-data); font-size: 13px; font-variant-numeric: tabular-nums;
}
.ctl select:focus-visible, .ctl input:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 1px; border-color: transparent;
}
.ctl input[type="range"] { width: 100%; accent-color: var(--volt); }

/* Segmented control — for short, mutually exclusive choices. */
.seg { display: flex; gap: 3px; background: var(--bg-soft);
       border: 1px solid var(--border-2); border-radius: 9px; padding: 3px; }
.seg button {
  flex: 1; appearance: none; background: none; border: 0; cursor: pointer;
  color: var(--muted); font-family: var(--font-data); font-size: 12px;
  padding: 7px 6px; border-radius: 6px; transition: background .15s, color .15s;
  white-space: nowrap; font-variant-numeric: tabular-nums;
}
.seg button[aria-pressed="true"] { background: var(--surface-2); color: var(--volt); }
.seg button:focus-visible { outline: 2px solid var(--cyan); outline-offset: -2px; }

.run-btn {
  width: 100%; margin-top: 18px; padding: 13px 16px;
  font-family: var(--font-data); font-size: 13px; font-weight: 700;
  color: #07090d; background: var(--grad);
  border: 0; border-radius: 10px; cursor: pointer; font-variant-numeric: tabular-nums;
}
.run-btn:hover:not(:disabled) { filter: brightness(1.08); }
.run-btn:disabled { opacity: .5; cursor: not-allowed; }
.run-btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

/* ── Progress + status ───────────────────────────────────── */
.lab-status {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-data); font-size: 12px; color: var(--muted);
  margin-top: 14px; min-height: 20px; font-variant-numeric: tabular-nums;
}
.bar { height: 6px; border-radius: 3px; background: var(--surface-2);
       overflow: hidden; margin-top: 10px; }
.bar > i { display: block; height: 100%; width: 0; background: var(--grad);
           transition: width .2s ease; }
.spinner {
  width: 13px; height: 13px; flex: none; border-radius: 50%;
  border: 2px solid var(--border-2); border-top-color: var(--volt);
  animation: labspin .7s linear infinite;
}
@keyframes labspin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2.4s; }
  .bar > i { transition: none; }
}

.lab-error {
  border: 1px solid rgba(255, 107, 107, 0.4);
  background: rgba(255, 107, 107, 0.07);
  color: #ffb4b4; border-radius: 10px; padding: 12px 14px;
  font-size: 13px; margin-top: 14px;
}
.lab-empty {
  border: 1px dashed var(--border-2); border-radius: var(--radius);
  padding: 44px 24px; text-align: center; color: var(--faint);
  font-family: var(--font-data); font-size: 13px; line-height: 1.7; font-variant-numeric: tabular-nums;
}

/* ── Charts ──────────────────────────────────────────────── */
.chart-block { margin-bottom: 6px; }
.chart-block:last-child { margin-bottom: 0; }
.chart-head {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px; margin-bottom: 6px;
}
.chart-title {
  font-family: var(--font-data); font-size: 11px; color: var(--muted); font-variant-numeric: tabular-nums;
}
.chart-read {
  font-family: var(--font-data); font-size: 12px; color: var(--text);
  font-variant-numeric: tabular-nums;
}
.chart-canvas { width: 100%; display: block; cursor: crosshair; touch-action: none; }
.chart-canvas:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

.legend { display: flex; gap: 16px; flex-wrap: wrap;
          font-family: var(--font-data); font-size: 11px; color: var(--muted); font-variant-numeric: tabular-nums;
}
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 12px; height: 2px; border-radius: 1px; display: inline-block; }

/* ── Scrubber ────────────────────────────────────────────── */
.scrub-row {
  display: flex; align-items: center; gap: 12px;
  margin: 16px 0 4px; padding-top: 16px; border-top: 1px solid var(--border);
}
.scrub-row input[type="range"] { flex: 1; accent-color: var(--cyan); }
.scrub-row .step-lbl {
  font-family: var(--font-data); font-size: 12px; color: var(--muted);
  white-space: nowrap; font-variant-numeric: tabular-nums;
}

/* ── Metric readouts ─────────────────────────────────────── */
.metric-grid {
  display: grid; gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 11px; overflow: hidden;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
}
.metric {
  background: var(--surface); padding: 13px 14px;
}
.metric .k {
  font-family: var(--font-data); font-size: 10px; color: var(--faint); display: block; margin-bottom: 5px; font-variant-numeric: tabular-nums;
}
.metric .v {
  font-family: var(--font-data); font-size: 17px; font-weight: 700;
  font-variant-numeric: tabular-nums; letter-spacing: -0.01em;
}
.metric .cmp {
  display: block; font-family: var(--font-data); font-size: 11px;
  color: var(--faint); margin-top: 3px; font-variant-numeric: tabular-nums;
}
.pos { color: var(--pos); } .neg { color: var(--neg); } .neutral { color: var(--text); }

/* ── Provenance / receipt ────────────────────────────────── */
.receipt {
  font-family: var(--font-mono); font-size: 12px;
  display: grid; grid-template-columns: auto 1fr; gap: 7px 18px;
  align-items: baseline;
}
.receipt dt { color: var(--faint); letter-spacing: 0.06em; text-transform: uppercase;
              font-size: 10px; white-space: nowrap; }
.receipt dd { color: var(--text); word-break: break-all; font-variant-numeric: tabular-nums; }

.tag-synthetic, .tag-real, .tag-precomputed {
  display: inline-block; font-family: var(--font-data); font-size: 10px;
  padding: 3px 8px; border-radius: 5px; vertical-align: middle; font-variant-numeric: tabular-nums;
}
.tag-real { color: var(--pos); background: rgba(93, 242, 160, 0.11);
            border: 1px solid rgba(93, 242, 160, 0.3); }
.tag-synthetic { color: var(--cyan); background: rgba(54, 224, 255, 0.10);
                 border: 1px solid rgba(54, 224, 255, 0.3); }
.tag-precomputed { color: var(--muted); background: rgba(255,255,255,0.04);
                   border: 1px solid var(--border-2); }

/* A caveat the reader must not miss, but which shouldn't shout either. */
.caveat {
  border-left: 2px solid var(--cyan); padding: 2px 0 2px 12px;
  color: var(--muted); font-size: 12.5px; line-height: 1.55; margin-top: 14px;
}

/* ── Agent X-Ray ─────────────────────────────────────────── */
.xr-bar {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  padding: 16px 20px; margin-bottom: 16px;
}
.xr-when { display: flex; align-items: baseline; gap: 10px; white-space: nowrap; }
.xr-when strong { font-family: var(--font-data); font-size: 14px; color: var(--text); font-variant-numeric: tabular-nums; }
.xr-price { font-family: var(--font-data); font-size: 13px; color: var(--volt); font-variant-numeric: tabular-nums; }
.xr-scrub-row { flex: 1; min-width: 220px; margin: 0; padding: 0; border: 0; }

/* The causal chain reads left to right: what came in, what was decided,
   what it cost, where it left the book. */
.xr-chain {
  display: flex; align-items: stretch; gap: 8px; flex-wrap: wrap;
  margin-bottom: 20px;
}
.xr-node {
  flex: 1 1 150px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 11px; padding: 13px 15px;
}
.xr-node .k {
  display: block; font-family: var(--font-data); font-size: 10px;
  color: var(--cyan); margin-bottom: 6px; font-variant-numeric: tabular-nums;
}
.xr-node .v {
  display: block; font-family: var(--font-data); font-size: 19px;
  font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -0.01em;
}
.xr-node .cmp {
  display: block; font-family: var(--font-data); font-size: 10.5px;
  color: var(--faint); margin-top: 4px; font-variant-numeric: tabular-nums;
}
.xr-node.is-absent .v { color: var(--faint); font-size: 14px; font-weight: 400; }
.xr-arrow {
  display: flex; align-items: center; color: var(--faint);
  font-size: 16px; flex: none;
}
@media (max-width: 820px) { .xr-arrow { display: none; } }

.xr-grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
@media (max-width: 980px) { .xr-grid { grid-template-columns: 1fr; } }

.xr-hint { font-size: 12.5px; color: var(--faint); margin: -6px 0 16px; line-height: 1.5; }

/* Feature rows: label, diverging bar, value. */
.xr-group { margin-bottom: 16px; }
.xr-group:last-child { margin-bottom: 0; }
.xr-group > h4 {
  font-family: var(--font-data); font-size: 10px; font-weight: 500; color: var(--faint);
  padding-bottom: 6px; margin-bottom: 8px; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums;
}
.xr-feat {
  display: grid; grid-template-columns: 116px 1fr 62px;
  align-items: center; gap: 10px; padding: 3px 0;
}
.xr-feat .fname {
  font-family: var(--font-data); font-size: 11px; color: var(--muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-variant-numeric: tabular-nums;
}
.xr-feat .fval {
  font-family: var(--font-data); font-size: 11.5px; text-align: right;
  font-variant-numeric: tabular-nums;
}
/* Diverging bar with a centre rule at the series mean (z-score 0). */
.fbar { position: relative; height: 13px; background: var(--bg-soft); border-radius: 3px; }
.fbar::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 1px; background: var(--border-2);
}
.fbar > i { position: absolute; top: 2px; bottom: 2px; border-radius: 2px; }
.fbar > i.up { background: var(--pos); left: 50%; }
.fbar > i.dn { background: var(--neg); right: 50%; }

/* Heatmap of the whole feature window. */
#xr-heatmap { height: 260px; cursor: default; }
.xr-scale {
  display: flex; align-items: center; gap: 8px; margin-top: 8px;
  font-family: var(--font-data); font-size: 10px; color: var(--faint); font-variant-numeric: tabular-nums;
}
.xr-ramp {
  flex: 1; height: 7px; border-radius: 4px;
  background: linear-gradient(90deg, #ff6b6b, #121a25 50%, #5df2a0);
}
/* A feature that is structurally zero on this path (e.g. cross-asset features on
   a synthetic series) is dimmed, so a flat row reads as "inert", not "neutral". */
.xr-feat.is-inert .fname { color: var(--faint); font-style: italic; }
.xr-feat.is-inert .fbar { opacity: .35; }
.fval.inert { color: var(--faint); }

/* ── Can you break the agent? ────────────────────────────── */
.gen-intro { max-width: 68ch; margin-bottom: 22px; }
.gen-title {
  font-family: var(--font-display); font-size: clamp(22px, 3vw, 30px);
  font-weight: 700; letter-spacing: -0.02em; margin-bottom: 10px;
}
.gen-intro p { color: var(--muted); font-size: 15px; }

.gen-head {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap; margin-bottom: 6px;
}
.gen-head h3 { margin-bottom: 0; }
.gen-market { max-width: 210px; }

/* Agent A vs Agent B, side by side, same scale. */
.ab-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px; margin-top: 18px;
}
.ab-card {
  border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; background: var(--bg-soft);
}
.ab-card.is-winner { border-color: rgba(93, 242, 160, 0.42); }
.ab-name {
  font-family: var(--font-data); font-size: 12px;
  color: var(--text); margin-bottom: 3px; font-variant-numeric: tabular-nums;
}
.ab-sub { font-family: var(--font-data); font-size: 10.5px; color: var(--faint); margin-bottom: 14px; font-variant-numeric: tabular-nums;
}

.ab-row {
  display: grid; grid-template-columns: 74px 1fr auto; gap: 10px;
  align-items: center; padding: 7px 0;
}
.ab-row .lbl { font-family: var(--font-data); font-size: 10.5px; color: var(--faint); font-variant-numeric: tabular-nums;
}
.ab-row .val { font-family: var(--font-data); font-size: 15px; font-weight: 700;
               font-variant-numeric: tabular-nums; text-align: right; }
.ab-row .ci { font-family: var(--font-data); font-size: 10px; color: var(--faint);
              display: block; font-weight: 400; font-variant-numeric: tabular-nums;
}

/* Per-seed dots: five training runs, shown as five points. */
.seed-strip { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.seed-dot {
  width: 9px; height: 9px; border-radius: 50%; flex: none;
  border: 1px solid var(--border-2);
}
.seed-dot.up { background: var(--pos); border-color: transparent; }
.seed-dot.dn { background: var(--neg); border-color: transparent; }

.ab-gap {
  margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: baseline;
}
.ab-gap .lbl { font-family: var(--font-data); font-size: 10px; color: var(--faint); font-variant-numeric: tabular-nums;
}
.ab-gap .val { font-family: var(--font-data); font-size: 17px; font-weight: 700;
               font-variant-numeric: tabular-nums; }

.gen-verdict {
  margin-top: 18px; padding: 14px 16px; border-radius: 11px;
  background: var(--surface-2); border: 1px solid var(--border);
  font-size: 14px; line-height: 1.6; color: var(--text);
}
.gen-verdict b { color: var(--volt); }

.gen-stats { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border); }
.gen-stats h4 {
  font-family: var(--font-data); font-size: 11px; color: var(--cyan); font-weight: 500; margin-bottom: 6px; font-variant-numeric: tabular-nums;
}
.stat-controls { display: flex; gap: 14px; align-items: flex-end; flex-wrap: wrap; }
.stat-controls label {
  font-family: var(--font-data); font-size: 10.5px; color: var(--muted);
  display: flex; flex-direction: column; gap: 6px; font-variant-numeric: tabular-nums;
}
.stat-controls select {
  padding: 8px 10px; background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border-2); border-radius: 8px;
  font-family: var(--font-data); font-size: 12px; min-width: 120px; font-variant-numeric: tabular-nums;
}
.run-btn-sm { width: auto; margin-top: 0; padding: 9px 20px; font-size: 11px; }

.stat-out {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px; background: var(--border); border: 1px solid var(--border);
  border-radius: 11px; overflow: hidden; margin-top: 14px;
}

.shift-controls {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px; align-items: end; margin: 18px 0 6px;
}
.shift-controls .run-btn { margin-top: 0; }

/* Regime bars: one row per distribution, diverging from zero. */
.rbar-row {
  display: grid; grid-template-columns: 150px 1fr 96px;
  gap: 12px; align-items: center; padding: 7px 0;
}
.rbar-name { font-family: var(--font-data); font-size: 12px; color: var(--text); font-variant-numeric: tabular-nums; }
.rbar-name small { display: block; color: var(--faint); font-size: 10px; }
.rbar-track { position: relative; height: 20px; background: var(--bg-soft); border-radius: 4px; }
.rbar-track::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 1px; background: var(--border-2);
}
.rbar-track > i { position: absolute; top: 3px; bottom: 3px; border-radius: 3px; }
.rbar-track > i.up { background: var(--pos); left: 50%; }
.rbar-track > i.dn { background: var(--neg); right: 50%; }
.rbar-val {
  font-family: var(--font-data); font-size: 12.5px; text-align: right;
  font-variant-numeric: tabular-nums;
}
.rbar-val small { display: block; color: var(--faint); font-size: 10px; }
/* Per-path points on each regime bar: the spread must be visible, not averaged away. */
.rbar-track > .path-dot {
  position: absolute; top: 50%; width: 6px; height: 6px; margin: -3px 0 0 -3px;
  border-radius: 50%; background: var(--text); opacity: .75;
  border: 1px solid var(--bg); pointer-events: auto;
}
.rbar-row.is-reference .rbar-name { color: var(--volt); }
.ref-tag {
  font-family: var(--font-data); font-size: 9px; font-style: normal; color: var(--volt);
  border: 1px solid rgba(212,255,63,.35); border-radius: 4px; padding: 1px 5px;
  margin-left: 6px; vertical-align: middle; font-variant-numeric: tabular-nums;
}
/* A mean that does not separate from noise is not coloured as a win or a loss. */
.rbar-val.muted-val { color: var(--muted); }
/* Keep the reference tag on one line; it wraps awkwardly beside a long label. */
.ref-tag { white-space: nowrap; }
.rbar-row { grid-template-columns: minmax(150px, 190px) 1fr 96px; }
.rbar-name { line-height: 1.35; }

/* ── Real or luck? ───────────────────────────────────────── */
.sub-h {
  font-family: var(--font-data); font-size: 11px; color: var(--cyan); font-weight: 500;
  margin: 26px 0 6px; font-variant-numeric: tabular-nums;
}

/* The whole lesson in one comparison: one run beside five. */
.verdict-pair {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; margin: 18px 0;
}
.vp-card {
  border: 1px solid var(--border); border-radius: 12px;
  padding: 20px; background: var(--bg-soft); position: relative;
}
.vp-card.is-claim { border-color: rgba(212, 255, 63, 0.35); }
.vp-card.is-truth { border-color: rgba(54, 224, 255, 0.35); }
.vp-kicker {
  font-family: var(--font-data); font-size: 10px; color: var(--faint); margin-bottom: 10px; font-variant-numeric: tabular-nums;
}
.vp-num {
  font-family: var(--font-data); font-size: clamp(30px, 5vw, 44px);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.vp-meta {
  font-family: var(--font-data); font-size: 11.5px; color: var(--muted);
  margin-top: 10px; line-height: 1.7; font-variant-numeric: tabular-nums;
}
.vp-flag {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 12px;
  font-family: var(--font-data); font-size: 11px;
  padding: 4px 9px; border-radius: 6px; font-variant-numeric: tabular-nums;
}
.vp-flag.bad { color: var(--neg); background: rgba(255,107,107,.1);
               border: 1px solid rgba(255,107,107,.3); }
.vp-flag.ok { color: var(--pos); background: rgba(93,242,160,.1);
              border: 1px solid rgba(93,242,160,.3); }

/* One row per training run. */
.seed-row {
  display: grid; grid-template-columns: 92px 1fr 84px;
  gap: 12px; align-items: center; padding: 5px 0;
}
.seed-row .sname {
  font-family: var(--font-data); font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums;
}
.seed-row .stack { position: relative; height: 16px;
                   background: var(--bg-soft); border-radius: 3px; }
.seed-row .stack::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 1px; background: var(--border-2);
}
.seed-row .stack > i { position: absolute; top: 3px; bottom: 3px; border-radius: 2px; }
.seed-row .stack > i.up { background: var(--pos); left: 50%; }
.seed-row .stack > i.dn { background: var(--neg); right: 50%; }
.seed-row .sval {
  font-family: var(--font-data); font-size: 12px; text-align: right;
  font-variant-numeric: tabular-nums;
}
.seed-row.is-best .sname { color: var(--volt); }

#sd-hist { height: 150px; cursor: default; }

/* ── What if? (counterfactual) ───────────────────────────── */
#wi-card { margin-top: 20px; }
.wi-ctl { display: flex; align-items: center; gap: 10px; }
.wi-ctl label {
  font-family: var(--font-data); font-size: 10.5px; color: var(--muted); font-variant-numeric: tabular-nums;
}
.wi-ctl select {
  padding: 7px 10px; background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border-2); border-radius: 8px;
  font-family: var(--font-data); font-size: 12px; font-variant-numeric: tabular-nums;
}
.wi-row {
  display: grid; grid-template-columns: 128px 1fr 106px 92px;
  gap: 12px; align-items: center; padding: 9px 0;
  border-bottom: 1px solid var(--border);
}
.wi-row:last-child { border-bottom: 0; }
.wi-row.is-agent { background: rgba(212, 255, 63, 0.045); }
.wi-name { font-family: var(--font-data); font-size: 12px; color: var(--text); font-variant-numeric: tabular-nums; }
.wi-name small { display: block; color: var(--faint); font-size: 10px; }
.wi-row.is-agent .wi-name { color: var(--volt); }
.wi-track { position: relative; height: 18px; background: var(--bg-soft); border-radius: 4px; }
.wi-track::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 1px; background: var(--border-2);
}
.wi-track > i { position: absolute; top: 3px; bottom: 3px; border-radius: 3px; }
.wi-track > i.up { background: var(--pos); left: 50%; }
.wi-track > i.dn { background: var(--neg); right: 50%; }
.wi-num {
  font-family: var(--font-data); font-size: 12.5px; text-align: right;
  font-variant-numeric: tabular-nums;
}
.wi-num small { display: block; color: var(--faint); font-size: 10px; }
.wi-head-row {
  display: grid; grid-template-columns: 128px 1fr 106px 92px;
  gap: 12px; padding-bottom: 7px; border-bottom: 1px solid var(--border-2);
  font-family: var(--font-data); font-size: 9.5px; color: var(--faint); font-variant-numeric: tabular-nums;
}
.wi-head-row span:nth-child(3), .wi-head-row span:nth-child(4) { text-align: right; }

/* ── Research notebook ───────────────────────────────────── */
.nb-builder {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px; align-items: end; margin-top: 16px;
}
.nb-builder .ctl-wide { grid-column: 1 / -1; }
.nb-builder .run-btn { margin-top: 0; }
.ctl-opt {
  font-size: 9px; color: var(--faint); margin-left: 5px;
}
#nb-question {
  width: 100%; padding: 10px 12px; background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border-2); border-radius: 9px;
  font-family: var(--font-body); font-size: 13.5px;
}
#nb-question::placeholder { color: var(--faint); }
.nb-count {
  font-family: var(--font-data); font-size: 11px; color: var(--faint); font-variant-numeric: tabular-nums;
}
.btn-link {
  background: none; border: 0; cursor: pointer; padding: 4px 2px;
  font-family: var(--font-data); font-size: 11px; color: var(--cyan); font-variant-numeric: tabular-nums;
}
.btn-link:hover { color: var(--volt); }

/* One row per experiment: id, what it asked, what it found. */
.nb-row {
  display: grid; grid-template-columns: 96px 1fr auto;
  gap: 14px; align-items: center; padding: 12px 10px;
  border-bottom: 1px solid var(--border); cursor: pointer;
  border-radius: 8px; transition: background 0.12s ease;
}
.nb-row:hover { background: var(--surface-2); }
.nb-row:last-child { border-bottom: 0; }
.nb-id {
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  color: var(--volt); letter-spacing: 0.02em;
}
.nb-id small {
  display: block; font-weight: 400; color: var(--faint);
  font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase;
}
.nb-main { min-width: 0; }
.nb-q { font-size: 13.5px; color: var(--text); margin-bottom: 3px; }
.nb-q.is-unstated { color: var(--muted); font-style: italic; }
.nb-cfg {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--faint);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nb-find { font-family: var(--font-data); font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }
.nb-find small { display: block; color: var(--faint); font-size: 9.5px; }
.nb-status-chip {
  display: inline-block; font-family: var(--font-data); font-size: 9px; padding: 2px 7px;
  border-radius: 4px; border: 1px solid var(--border-2); color: var(--muted); font-variant-numeric: tabular-nums;
}
.nb-status-chip.done { color: var(--pos); border-color: rgba(93,242,160,.35); }
.nb-status-chip.error { color: var(--neg); border-color: rgba(255,107,107,.35); }
.nb-status-chip.running { color: var(--cyan); border-color: rgba(54,224,255,.35); }
.nb-empty {
  padding: 30px 10px; text-align: center; color: var(--muted); font-size: 14px;
}
/* The experiment selector's labels are longer than the auto column; give it room. */
.nb-builder { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }
.nb-builder select { width: 100%; text-overflow: ellipsis; }

/* ── Home: what you can run ──────────────────────────────── */
.lab-strip {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.lab-card {
  position: relative; display: block; text-decoration: none;
  padding: 22px 20px 46px; border-radius: 14px;
  background: var(--surface); border: 1px solid var(--border);
  transition: border-color .16s ease, transform .16s ease, background .16s ease;
}
.lab-card:hover {
  border-color: var(--border-2); transform: translateY(-2px);
  background: var(--surface-2);
}
.lab-card:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.lab-card-n {
  font-family: var(--font-data); font-size: 10px;
  color: var(--faint); font-variant-numeric: tabular-nums;
}
.lab-card h3 {
  font-family: var(--font-display); font-size: 18px; font-weight: 600;
  margin: 8px 0 8px; color: var(--text); letter-spacing: -0.01em;
}
.lab-card p { color: var(--muted); font-size: 13.5px; line-height: 1.6; }
.lab-card b { color: var(--volt); }
.lab-card-tag {
  position: absolute; left: 20px; bottom: 18px;
  font-family: var(--font-data); font-size: 9px; padding: 3px 8px; border-radius: 5px; font-variant-numeric: tabular-nums;
}
.tag-mixed {
  color: var(--cyan); background: rgba(54, 224, 255, 0.09);
  border: 1px solid rgba(54, 224, 255, 0.28);
}
.lab-strip-note {
  margin-top: 22px; padding: 14px 16px; border-radius: 11px;
  background: var(--bg-soft); border: 1px solid var(--border);
  color: var(--muted); font-size: 13.5px; line-height: 1.65;
}
.lab-strip-note b { color: var(--text); }

/* Keyboard focus must be visible on every interactive control in the lab. */
.lab-tab:focus-visible,
.seg button:focus-visible,
.run-btn:focus-visible,
.btn-link:focus-visible,
.nb-row:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 6px;
}
.lab-panel:focus { outline: none; }

/* Respect a reduced-motion preference: keep state changes, drop the movement. */
@media (prefers-reduced-motion: reduce) {
  .lab-card, .lab-card:hover { transition: none; transform: none; }
  .bar > i { transition: none; }
}
/* Backend answers, but predates the lab endpoints — neither "live" nor "down". */
.api-pill.is-stale {
  color: #ffcc66; border-color: rgba(255, 204, 102, 0.34);
  background: rgba(255, 204, 102, 0.08);
}
.api-pill.is-stale .dot-led { background: #ffcc66; box-shadow: 0 0 8px #ffcc66; }

/* the backend is unreachable: one note up front, and no "Live" claims */
.lab-offline-note {
  margin: 0 0 24px;
  padding: 12px 16px;
  color: var(--text);
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.4);
  border-radius: 12px;
  line-height: 1.5;
}
.lab-offline .tag-real { display: none; }

/* the backend is asleep and being woken -- in progress, not a failure */
.api-pill.is-waking {
  color: var(--cyan);
  border-color: rgba(54, 224, 255, 0.4);
}
.api-pill.is-waking .dot-led {
  background: var(--cyan);
  animation: pill-pulse 1.4s ease-in-out infinite;
}
@keyframes pill-pulse {
  0%, 100% { opacity: 1;   box-shadow: 0 0 8px var(--cyan); }
  50%      { opacity: 0.35; box-shadow: 0 0 2px var(--cyan); }
}
@media (prefers-reduced-motion: reduce) {
  .api-pill.is-waking .dot-led { animation: none; }
}

/* ── Signal or Noise? ─────────────────────────────────────────────────────── */
/* The charts deliberately carry no axis, no scale and no ticker: the whole
   design rests on nothing but the shape being visible, so the styling must not
   put back a cue the backend worked to remove. */
.pc-grid {
  display: grid; gap: 12px; margin-top: 16px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
.pc-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 10px 10px 12px;
}
.pc-card.is-right { border-color: rgba(93, 242, 160, 0.55); }
.pc-card.is-wrong { border-color: rgba(255, 107, 107, 0.55); }
.pc-card-head {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 20px; margin-bottom: 4px;
}
.pc-n {
  font: 600 11px/1 var(--font-data); color: var(--faint); font-variant-numeric: tabular-nums;
}
.pc-truth { font: 500 11px/1 var(--font-data); color: var(--muted); font-variant-numeric: tabular-nums; }
.pc-truth b { color: var(--text); }
.pc-ac { color: var(--faint); }
.pc-canvas { width: 100%; display: block; }
.pc-seg { margin-top: 8px; width: 100%; }
.pc-seg button { flex: 1; font-size: 11.5px; padding: 6px 4px; }
.pc-seg button:disabled { opacity: 0.75; cursor: default; }

.pc-actions {
  display: flex; align-items: center; gap: 14px;
  margin-top: 16px; flex-wrap: wrap;
}
.pc-progress { font: 500 12.5px/1 var(--font-data); color: var(--muted); font-variant-numeric: tabular-nums; }

.pc-score {
  display: flex; align-items: stretch; gap: 12px;
  margin-top: 20px; flex-wrap: wrap;
}
.pc-score-main {
  display: flex; flex-direction: column; justify-content: center;
  padding: 12px 20px; border-radius: 12px;
  background: var(--bg-soft); border: 1px solid var(--border-2);
}
.pc-score-n { font: 700 34px/1 var(--font-display); color: var(--volt); }
.pc-score-d { font-size: 20px; color: var(--muted); }
.pc-score-lbl {
  margin-top: 4px; font: 500 11.5px/1 var(--font-data); color: var(--faint); font-variant-numeric: tabular-nums;
}
.pc-verdict {
  margin-top: 14px; padding: 12px 14px; border-radius: 11px;
  background: var(--bg-soft); border-left: 2px solid var(--cyan);
  color: var(--text); font-size: 14px; line-height: 1.62;
}
.pc-two {
  display: grid; gap: 12px; margin-top: 14px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.pc-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 16px;
}
.pc-box h4 {
  margin: 0 0 6px; font: 600 13px/1.3 var(--font-display); color: var(--text);
}
.pc-ref-score { margin: 8px 0; font: 700 20px/1 var(--font-display); color: var(--cyan); }
.pc-ref-sub { font: 500 12px/1 var(--font-data); color: var(--muted); font-variant-numeric: tabular-nums; }
.pc-power { width: 100%; border-collapse: collapse; margin: 8px 0 6px; }
.pc-power th {
  text-align: left; font: 600 10.5px/1 var(--font-data); color: var(--faint); padding-bottom: 6px; font-variant-numeric: tabular-nums;
}
.pc-power td {
  padding: 4px 0; font: 500 13px/1.4 var(--font-data);
  border-top: 1px solid var(--border); font-variant-numeric: tabular-nums;
}
.pc-power td:last-child { text-align: right; }
.pc-tie {
  margin-top: 14px; font-size: 13.5px; line-height: 1.65; color: var(--muted);
}
.pc-tie b { color: var(--volt); font-family: var(--font-data); font-variant-numeric: tabular-nums; }

/* ── Occlusion attribution ────────────────────────────────────────────────── */
/* Bars are scaled to the largest effect measured, not to a total: correlated
   features double-count, so this ranks — it does not decompose. */
.attr-groups { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 16px; }
.attr-chip {
  display: flex; align-items: baseline; gap: 7px;
  padding: 6px 11px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border);
}
.attr-chip-k { font: 500 11.5px/1 var(--font-body); color: var(--muted); }
.attr-chip-v { font: 700 12.5px/1 var(--font-data); color: var(--volt); font-variant-numeric: tabular-nums; }

.attr-cols {
  display: grid; gap: 18px;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
}
@media (max-width: 780px) { .attr-cols { grid-template-columns: 1fr; } }
.attr-h {
  margin: 0 0 8px; font: 600 10.5px/1 var(--font-data); color: var(--faint); font-variant-numeric: tabular-nums;
}
.attr-row {
  display: grid; grid-template-columns: 118px 1fr 52px;
  align-items: center; gap: 9px; padding: 2px 0;
}
.attr-name {
  font: 500 11.5px/1.3 var(--font-data); color: var(--muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-variant-numeric: tabular-nums;
}
.attr-track {
  height: 9px; border-radius: 5px; background: rgba(255, 255, 255, 0.05);
  overflow: hidden;
}
.attr-track > i {
  display: block; height: 100%; border-radius: 5px;
  background: linear-gradient(90deg, var(--cyan), var(--volt));
}
.attr-val {
  font: 500 11.5px/1 var(--font-data); color: var(--text); text-align: right; font-variant-numeric: tabular-nums;
}
.attr-dead b { color: var(--text); font-family: var(--font-data); font-variant-numeric: tabular-nums; }
.attr-caveats {
  margin-top: 16px; padding: 12px 14px; border-radius: 11px;
  background: var(--bg-soft); border: 1px solid var(--border);
}
.attr-method { margin: 0 0 8px; font-size: 13px; line-height: 1.6; color: var(--text); }
.attr-caveats ul { margin: 0; padding-left: 18px; }
.attr-caveats li {
  font-size: 12.5px; line-height: 1.62; color: var(--muted); margin-bottom: 4px;
}

/* ── Walk-forward ─────────────────────────────────────────────────────────── */
/* The timeline is the whole methodological argument in one picture: the dim
   block is what the scaler saw, the bright block is what it was scored on, and
   they must never touch. */
.wf-timeline { margin: 10px 0 22px; }
.wf-row {
  display: grid; grid-template-columns: 62px 1fr 168px;
  align-items: center; gap: 10px; padding: 3px 0;
}
.wf-row-k { font: 600 11px/1 var(--font-data); color: var(--faint); font-variant-numeric: tabular-nums; }
.wf-row-v { font: 500 11px/1 var(--font-data); color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.wf-track {
  position: relative; height: 15px; border-radius: 5px;
  background: rgba(255, 255, 255, 0.035);
}
.wf-track > i { position: absolute; top: 0; height: 100%; border-radius: 4px; }
.wf-train { background: rgba(54, 224, 255, 0.22); }
.wf-test { background: var(--volt); }

.wf-table-wrap { overflow-x: auto; margin-bottom: 18px; }
.wf-table { width: 100%; border-collapse: collapse; min-width: 460px; }
.wf-table th {
  text-align: right; padding: 0 0 7px; white-space: nowrap;
  font: 600 10.5px/1 var(--font-data); color: var(--faint); font-variant-numeric: tabular-nums;
}
.wf-table th:first-child, .wf-table td:first-child { text-align: left; }
.wf-table td {
  padding: 6px 0; text-align: right; white-space: nowrap;
  font: 500 12.5px/1.3 var(--font-data); border-top: 1px solid var(--border); font-variant-numeric: tabular-nums;
}
.wf-table td + td { padding-left: 14px; }
.wf-summary { margin-bottom: 18px; }

/* ── Pre-registration ─────────────────────────────────────────────────────── */
.nb-pred { flex-wrap: wrap; }
.nb-pred button { font-size: 12px; }
.ctl-note {
  margin: 7px 0 0; font-size: 11.5px; line-height: 1.6; color: var(--faint);
}
.nb-pred-out {
  margin: 14px 0; padding: 12px 14px; border-radius: 11px;
  background: var(--bg-soft); border-left: 2px solid var(--border-2);
}
.nb-pred-out.is-hit { border-left-color: var(--pos); }
.nb-pred-out.is-miss { border-left-color: var(--neg); }
.nb-pred-out.is-unscored { border-left-color: var(--muted); }
.nb-pred-tag {
  display: inline-block; margin-bottom: 6px;
  font: 600 10.5px/1 var(--font-data); color: var(--muted); font-variant-numeric: tabular-nums;
}
.is-hit .nb-pred-tag { color: var(--pos); }
.is-miss .nb-pred-tag { color: var(--neg); }
.nb-pred-out p { margin: 0 0 6px; font-size: 13.5px; line-height: 1.62; color: var(--text); }
.nb-pred-out p:last-child { margin-bottom: 0; }

/* ── Your Turn (human baseline) ───────────────────────────────────────────── */
.hm-account { display: flex; gap: 14px; flex-wrap: wrap; align-items: baseline; }
.hm-a { font: 500 12.5px/1 var(--font-data); color: var(--muted); font-variant-numeric: tabular-nums; }
.hm-a b { color: var(--text); font-size: 14px; }
.hm-controls {
  display: flex; align-items: center; gap: 14px;
  margin-top: 14px; flex-wrap: wrap;
}
.hm-controls label {
  font: 600 10.5px/1 var(--font-data); color: var(--faint); font-variant-numeric: tabular-nums;
}
.hm-controls input[type="range"] { flex: 1 1 200px; min-width: 160px; }
.hm-quick { display: flex; gap: 6px; }
.hm-quick button {
  padding: 6px 12px; border-radius: 7px; cursor: pointer;
  background: var(--bg-soft); border: 1px solid var(--border);
  color: var(--muted); font: 500 12px/1 var(--font-body);
}
.hm-quick button:hover { color: var(--text); border-color: var(--border-2); }
.hm-legend { justify-content: flex-start; gap: 16px; margin: 6px 0 14px; }
.lg-you::before { background: var(--pos); }
#hm-again { margin-top: 16px; }

/* ── Surrogate-data test ──────────────────────────────────────────────────── */
.sg-verdict-card .pc-verdict { margin-top: 0; }
.sg-table td { vertical-align: top; }
.sg-ci {
  display: block; margin-top: 2px;
  font: 500 10.5px/1 var(--font-data); color: var(--faint); font-variant-numeric: tabular-nums;
}
.sg-reads { margin: 14px 0 16px; padding-left: 18px; }
.sg-reads li {
  font-size: 13.5px; line-height: 1.65; color: var(--muted); margin-bottom: 7px;
}
.sg-reads li:last-child { margin-bottom: 0; }

/* ── Agent vs the naive strategies ────────────────────────────────────────── */
/* The agent's row is highlighted, never reordered: it sits where its return
   puts it, which is frequently last. */
.pg-baselines { margin-top: 22px; }
.pg-baselines .wf-table td:first-child { max-width: 260px; white-space: normal; }
.wf-table tr.is-agent td { color: var(--text); }
.wf-table tr.is-agent td:first-child { border-left: 2px solid var(--volt); padding-left: 9px; }