/* ═══════════════════════════════════════════════════════════════════
   MODEL CARD — shared partial for every Model Atlas destination
   Imported by linear-regression, decision-tree, random-forest,
   kmeans, and the rest. Provides:
     · breadcrumb back to the wizard
     · trade-off scorecard radar (4 axes)
     · "when it shines" / "when it fails" two-column grid
     · expandable <details> math block
     · "compare to" link row
     · canvas + sliders demo frame
   ═══════════════════════════════════════════════════════════════════ */

.mc-main {
  background: var(--paper);
  color: var(--ink);
}

/* ── Hero / breadcrumb ────────────────────────────────────────────── */
.mc-hero {
  padding: 120px 48px 40px;
  max-width: 1280px;
  margin: 0 auto;
}
.mc-breadcrumb {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-decoration: none;
  margin-bottom: 24px;
  padding: 6px 12px;
  border: 1px solid color-mix(in oklab, var(--ink) 18%, transparent);
  transition: color 180ms ease, border-color 180ms ease;
}
.mc-breadcrumb:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.mc-title { margin-top: 22px; }
.mc-kicker {
  margin-top: 24px;
  max-width: 720px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.mc-dateline {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  max-width: 900px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.mc-dateline .label { color: var(--ink-dim); }
.mc-dateline .value {
  color: var(--ink);
  margin-top: 4px;
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: 12px;
}

/* ── Sections ─────────────────────────────────────────────────────── */
.mc-section {
  padding: 60px 48px;
  max-width: 1280px;
  margin: 0 auto;
}
.mc-section .section-label { margin-bottom: 28px; }
.mc-prose {
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
}
.mc-prose p + p { margin-top: 14px; }
.mc-note {
  font-size: 13px;
  color: var(--ink-dim);
  max-width: 64ch;
  line-height: 1.55;
  margin: 0 0 24px;
}

/* ── Demo frame ───────────────────────────────────────────────────── */
.mc-demo {
  margin: 24px 0 0;
  padding: 20px;
  border: 1px solid color-mix(in oklab, var(--ink) 18%, transparent);
  background: var(--paper-2);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 320px);
  gap: 28px;
  align-items: start;
}
.mc-demo-canvas {
  position: relative;
  background: var(--paper);
  border: 1px solid color-mix(in oklab, var(--ink) 22%, transparent);
  aspect-ratio: 4 / 3;
  cursor: crosshair;
  overflow: hidden;
}
.mc-demo-canvas svg, .mc-demo-canvas canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.mc-demo-canvas .mc-canvas-hint {
  position: absolute;
  inset: auto auto 12px 12px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  pointer-events: none;
}
.mc-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.mc-control-head {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 4px;
}
.mc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.mc-field-label {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
}
.mc-field-label .val { color: var(--accent); }
.mc-field input[type="range"] { width: 100%; accent-color: var(--accent); }
.mc-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}
.mc-btn {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 8px 12px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}
.mc-btn:hover { background: var(--ink); color: var(--paper); }
.mc-btn.primary { background: var(--ink); color: var(--paper); }
.mc-btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.mc-btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.mc-readout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 18px;
  padding: 14px;
  border: 1px dashed color-mix(in oklab, var(--ink) 18%, transparent);
}
.mc-readout-cell .label {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.mc-readout-cell .value {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 22px;
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  margin-top: 4px;
  display: block;
}
.mc-preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.mc-preset-pill {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 6px 10px;
  border: 1px solid color-mix(in oklab, var(--ink) 24%, transparent);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}
.mc-preset-pill:hover { border-color: var(--accent); color: var(--accent); }
.mc-preset-pill.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* ── When-it-shines / fails grid ──────────────────────────────────── */
.mc-grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 24px;
  margin-top: 24px;
}
.mc-block {
  padding: 24px;
  border: 1px solid color-mix(in oklab, var(--ink) 16%, transparent);
  background: var(--paper-2);
}
.mc-block-tag {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.mc-block-title {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 22px;
  line-height: 1.15;
  margin: 0 0 10px;
  font-weight: 400;
}
.mc-block p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

/* ── Trade-off scorecard radar ────────────────────────────────────── */
.mc-tradeoff {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: 32px;
  align-items: center;
}
.mc-tradeoff-svg svg { width: 100%; height: auto; max-width: 320px; }
.mc-tradeoff-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.mc-tradeoff-list li {
  display: grid;
  grid-template-columns: 110px 1fr 36px;
  align-items: center;
  gap: 12px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
}
.mc-tradeoff-list .axis {
  text-transform: uppercase;
  color: var(--ink);
  letter-spacing: 0.16em;
  font-size: 10px;
}
.mc-tradeoff-list .bar {
  position: relative;
  height: 8px;
  background: color-mix(in oklab, var(--ink) 12%, transparent);
}
.mc-tradeoff-list .bar > span {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--accent);
}
.mc-tradeoff-list .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--ink-dim);
}

/* ── Math (expandable) ────────────────────────────────────────────── */
.mc-math {
  margin: 16px 0 0;
  padding: 0;
  border: 1px solid color-mix(in oklab, var(--ink) 14%, transparent);
}
.mc-math summary {
  cursor: pointer;
  padding: 14px 18px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mc-math summary::after {
  content: '+';
  font-size: 16px;
  color: var(--accent);
}
.mc-math[open] summary::after { content: '−'; }
.mc-math summary::-webkit-details-marker { display: none; }
.mc-math-body {
  padding: 0 18px 18px;
  font-family: 'Newsreader', Georgia, serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
}
.mc-math-body code, .mc-math-body .formula {
  font-family: 'DM Mono', ui-monospace, monospace;
  background: var(--paper-2);
  padding: 2px 6px;
  border: 1px solid color-mix(in oklab, var(--ink) 12%, transparent);
  font-size: 14px;
  display: inline-block;
}
.mc-math-body p { margin: 0 0 12px; }
.mc-math-body .formula-block {
  display: block;
  padding: 16px 20px;
  margin: 14px 0;
  text-align: center;
  font-size: 18px;
}

/* ── Compare-to row ───────────────────────────────────────────────── */
.mc-compare {
  margin: 32px 0 0;
  padding-top: 24px;
  border-top: 1px dashed color-mix(in oklab, var(--ink) 18%, transparent);
}
.mc-compare-head {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 14px;
}
.mc-compare-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.mc-compare-card {
  flex: 1 1 220px;
  min-width: 220px;
  padding: 16px 18px;
  border: 1px solid color-mix(in oklab, var(--ink) 22%, transparent);
  background: var(--paper);
  text-decoration: none;
  color: inherit;
  transition: background 200ms ease, color 200ms ease;
}
.mc-compare-card:hover {
  background: var(--ink);
  color: var(--paper);
}
.mc-compare-card .name {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 18px;
  line-height: 1.1;
  margin: 0 0 4px;
}
.mc-compare-card .note {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.mc-compare-card:hover .note { color: color-mix(in oklab, var(--paper) 70%, transparent); }
.mc-compare-card.is-stub { opacity: 0.6; cursor: default; }

/* ── Real-world / methodology ─────────────────────────────────────── */
.mc-real {
  font-style: italic;
  font-family: 'Newsreader', Georgia, serif;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  max-width: 60ch;
  margin: 0;
}
.mc-real strong {
  font-style: normal;
  color: var(--accent);
  font-weight: 500;
}

/* ── Try-the-wizard footer button ─────────────────────────────────── */
.mc-back-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: transparent;
  color: var(--ink);
  padding: 14px 22px;
  text-decoration: none;
  border: 1px solid var(--ink);
  margin-top: 12px;
  transition: background 200ms ease, color 200ms ease;
}
.mc-back-cta:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .mc-hero { padding: 100px 24px 32px; }
  .mc-section { padding-left: 24px; padding-right: 24px; }
  .mc-demo { grid-template-columns: 1fr; }
  .mc-demo-canvas { aspect-ratio: 4 / 3; }
  .mc-tradeoff { grid-template-columns: 1fr; }
  .mc-tradeoff-list li { grid-template-columns: 90px 1fr 36px; }
}