:root {
  --bg: #0f1115;
  --panel: #151a21;
  --panel-2: #12161d;
  --border: #262d38;
  --text: #e6e9ef;
  --text-dim: #8b95a5;
  --muted: #898781;
  --accent: #3987e5;
  --good: #0ca30c;
  --bad: #d03b3b;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  overflow: hidden;
}

a {
  color: var(--accent);
}

button {
  font: inherit;
  color: inherit;
  background: #1d242e;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover:not(:disabled) {
  background: #242d3a;
}
button:disabled {
  opacity: 0.45;
  cursor: default;
}
button.primary {
  background: #1d4ed8;
  border-color: #2563eb;
}
button.primary:hover:not(:disabled) {
  background: #2158e8;
}
button.ghost {
  background: transparent;
  padding: 3px 9px;
  font-size: 12px;
  color: var(--text-dim);
}

select,
input[type='number'],
input.expr {
  font: inherit;
  color: inherit;
  background: #1d242e;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
}
input[type='number'] {
  width: 66px;
}
input.expr {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
}
input[type='range'] {
  width: 100%;
  accent-color: var(--accent);
}

.app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* ── header ───────────────────────────────────────────── */
.header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}
.header h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.01em;
}
.header p {
  margin: 2px 0 0;
  font-size: 12.5px;
  color: var(--text-dim);
}
.repo-link {
  font-size: 12.5px;
  white-space: nowrap;
}

/* ── the collapsed-editor strip ───────────────────────── */
.editor-strip {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  text-align: left;
  background: var(--panel-2);
  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  padding: 7px 16px;
  font-size: 12.5px;
  color: var(--text-dim);
}
.editor-strip:hover:not(:disabled) {
  background: #1a2029;
  color: var(--text);
}
.strip-note {
  color: #c98500;
}
.strip-alert {
  margin-left: auto;
  color: #ff8f8f;
  font-weight: 600;
}

/* ── two columns ──────────────────────────────────────── */
.body {
  display: flex;
  flex: 1;
  min-height: 0;
}
.left {
  width: 42%;
  min-width: 340px;
  max-width: 620px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--border);
  background: var(--panel-2);
}
.right {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

/* ── script pane ──────────────────────────────────────── */
.script-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px 6px;
}
.script-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}
.method-blurb {
  margin: 0;
  padding: 0 12px 8px;
  font-size: 12.5px;
  color: var(--text-dim);
  line-height: 1.45;
}
.method-blurb.edited {
  color: #c98500;
}
.editor-host {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.editor-host .cm-editor {
  height: 100%;
  font-size: 12.5px;
}
.editor-host .cm-scroller {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.contract {
  padding: 8px 12px;
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: baseline;
}
.contract-head {
  font-weight: 600;
  color: var(--text);
  width: 100%;
}
.contract code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #1d242e;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--text);
}
.contract code.opt {
  opacity: 0.7;
}
.contract-note {
  width: 100%;
  font-size: 11.5px;
}

.error-box {
  margin: 0 12px 12px;
  border: 1px solid #5b2626;
  background: #1e1416;
  border-radius: 6px;
  padding: 8px 10px;
  max-height: 200px;
  overflow: auto;
}
.error-head {
  font-weight: 600;
  color: #ff8f8f;
  margin-bottom: 4px;
  font-size: 12.5px;
}
.error-box pre {
  margin: 0;
  font-size: 12px;
  white-space: pre-wrap;
  color: #e3b7b7;
}
.console {
  margin: 0 12px 12px;
  font-size: 12px;
  color: var(--text-dim);
}
.console pre {
  margin: 4px 0 0;
  max-height: 140px;
  overflow: auto;
  white-space: pre-wrap;
}

/* ── tabs ─────────────────────────────────────────────── */
.tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 8px 14px 0;
  border-bottom: 1px solid var(--border);
}
.tab {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  padding: 6px 13px;
  color: var(--text-dim);
  margin-bottom: -1px;
}
.tab:hover:not(.on) {
  background: #1a2029;
  color: var(--text);
}
.tab.on {
  background: var(--panel);
  border-color: var(--border);
  border-bottom-color: var(--panel);
  color: var(--text);
  font-weight: 600;
}
.run-status {
  margin-left: auto;
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding-bottom: 6px;
}

/* ── controls row ─────────────────────────────────────── */
.controls,
.conv-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 18px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}
.conv-controls {
  border-bottom: none;
  background: transparent;
  padding: 4px 0 12px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.field.grow {
  flex: 1;
  min-width: 160px;
}
.field-label {
  font-size: 11.5px;
  color: var(--muted);
}
.field-label b {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.chips {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.chip {
  padding: 3px 10px;
  font-size: 12.5px;
  color: var(--text-dim);
  background: #1a2029;
}
.chip.on {
  background: #1d4ed8;
  border-color: #2563eb;
  color: #fff;
}
/* a toggle that adds a plot series: the swatch previews the curve's colour */
.chip.tone {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.chip.tone .swatch {
  width: 14px;
  height: 3px;
  border-radius: 2px;
  background: var(--tone);
  flex: none;
}
.chip.tone.on {
  background: color-mix(in srgb, var(--tone) 20%, #151a21);
  border-color: var(--tone);
  color: var(--text);
}
.more-toggle {
  align-self: flex-end;
  margin-bottom: 2px;
}
.interval {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}
.check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--text-dim);
  cursor: pointer;
}
.slider-label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 220px;
  font-size: 11.5px;
  color: var(--muted);
}
.slider-label b {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ── panels ───────────────────────────────────────────── */
.panel-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  background: var(--panel);
}
.panel {
  padding: 14px 16px 40px;
  max-width: 1000px;
  /* centred, so the full-width layout with the editor collapsed stays balanced */
  margin: 0 auto;
}
.panel-lede {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-dim);
}
.panel-note {
  margin: 0 0 8px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-dim);
}
.panel-note.muted {
  color: var(--muted);
}
/* the paper-level detail, folded away until asked for */
.more {
  margin: -4px 0 12px;
  font-size: 12.5px;
}
.more summary {
  cursor: pointer;
  width: fit-content;
  font-size: 12px;
  color: var(--accent);
  user-select: none;
}
.more summary:hover {
  text-decoration: underline;
}
.more-body {
  color: var(--text-dim);
  line-height: 1.5;
}
.more-body p {
  margin: 4px 0 0;
}
h4.sub {
  margin: 22px 0 6px;
  font-size: 13px;
  font-weight: 650;
  color: var(--text);
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.row-controls {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.plot-host {
  position: relative;
  width: 100%;
  margin-bottom: 4px;
}
.plot-host svg {
  display: block;
  overflow: visible;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 2px 0 6px;
  font-size: 12px;
  color: var(--text-dim);
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.legend-value {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
}

.readout {
  display: flex;
  gap: 6px 18px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  padding: 4px 0 2px;
  /* fixed height: this row must never change size on hover, or everything
     below it jumps */
  height: 24px;
  overflow: hidden;
  white-space: nowrap;
}
.readout b {
  color: inherit;
  font-weight: 600;
}
.readout-hint {
  color: var(--muted);
}

.tooltip {
  position: absolute;
  top: 8px;
  right: 8px;
  background: #1a2029;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 9px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

.verdict {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border-radius: 8px;
  padding: 9px 12px;
  margin-bottom: 12px;
  font-size: 13px;
  line-height: 1.5;
  border: 1px solid var(--border);
}
.verdict.good {
  border-color: #1b4b1b;
  background: #10190f;
}
.verdict.bad {
  border-color: #5b2626;
  background: #1e1416;
}
.verdict-mark {
  font-size: 15px;
  line-height: 1.3;
}
.verdict.good .verdict-mark {
  color: var(--good);
}
.verdict.bad .verdict-mark {
  color: var(--bad);
}

.weights-int {
  font-size: 12.5px;
  color: var(--text-dim);
  margin-top: 4px;
}
.weights-int-values {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}
.weights-int-values span {
  min-width: 26px;
  text-align: center;
  padding: 2px 5px;
  background: #1a2029;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.stale-note {
  font-size: 12px;
  color: #c98500;
  margin-bottom: 6px;
}

/* ── convergence table ────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  margin: 6px 0 10px;
}
.conv-table {
  border-collapse: collapse;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.conv-table th,
.conv-table td {
  padding: 3px 10px;
  text-align: right;
  border-bottom: 1px solid var(--border);
}
.conv-table thead th {
  color: var(--muted);
  font-weight: 600;
  text-align: center;
}
.conv-table tr.sub-head th {
  font-weight: 400;
  font-size: 11px;
}
.conv-table td.n-cell {
  color: var(--text);
  font-weight: 600;
  text-align: left;
}
.conv-table td.ord {
  color: var(--muted);
}

/* ── narrow screens: stack the two columns ────────────── */
@media (max-width: 900px) {
  body {
    overflow: auto;
  }
  .body {
    flex-direction: column;
  }
  .left {
    width: 100%;
    max-width: none;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .editor-host {
    height: 320px;
    flex: none;
  }
  .panel-scroll {
    overflow: visible;
  }
}