/* ---------- Model Lab ---------- */
/* Screenshot strip and lightbox reuse Concept Lab's already-global
   .concept-shot-*/.concept-lightbox classes (concept-lab.css) rather than
   duplicating that styling — those class names aren't page-scoped. */

.model-lab-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-3);
}

.model-lab-tab {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.model-lab-tab:hover {
  color: var(--text);
  border-color: var(--muted);
}

.model-lab-tab.is-active {
  color: var(--green);
  border-color: var(--green);
  background: rgba(52, 211, 153, 0.1);
}

.model-lab-lesson-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.model-lab-model-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.model-lab-lesson {
  padding: 0;
  overflow: hidden;
}

.model-lab-lesson__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: none;
  background: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.model-lab-lesson:not(.is-expanded) .model-lab-lesson__header {
  color: var(--muted);
  font-weight: 500;
}

.model-lab-lesson__header:hover {
  color: var(--text);
}

.model-lab-lesson__chevron {
  font-size: 0.7rem;
  color: var(--muted);
  flex-shrink: 0;
}

.model-lab-lesson__body {
  padding: var(--space-3) var(--space-4) var(--space-4);
  border-top: 1px solid var(--border);
}

.model-lab-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.model-lab-section h3 {
  font-size: 0.85rem;
  color: var(--text);
  margin: 0 0 var(--space-1);
}

.model-lab-section ul,
.model-lab-section ol {
  margin: 0;
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--muted);
}

.model-lab-lesson__empty {
  font-size: 0.85rem;
  margin-bottom: var(--space-4);
}

.model-lab-updated {
  font-size: 0.8rem;
  margin-top: var(--space-2);
}

.model-lab-calc__title {
  font-size: 0.95rem;
  margin: 0 0 var(--space-3);
}

.model-lab-calc__outputs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.model-lab-calc__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.8rem;
}

.model-lab-calc__value {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text);
}

.model-lab-calc__badges {
  display: flex;
  gap: var(--space-2);
}

.model-lab-calc-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--muted);
}

.model-lab-calc-badge--green {
  background: rgba(52, 211, 153, 0.15);
  border-color: var(--green);
  color: var(--green);
}

.model-lab-calc-badge--red {
  background: rgba(244, 80, 106, 0.15);
  border-color: var(--red);
  color: var(--red);
}

.model-lab-calc-badge--amber {
  background: rgba(245, 196, 81, 0.15);
  border-color: var(--amber);
  color: var(--amber);
}

/* Lesson 9 (Metrics) — the one lesson with structured metric blocks and
   rating tables instead of headed bullet lists. */

.model-lab-lesson__subtitle {
  font-size: 0.85rem;
  margin: 0;
}

.model-lab-metric-intro {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}

.model-lab-metric-list {
  display: flex;
  flex-direction: column;
}

.model-lab-metric {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border);
}

.model-lab-metric:first-child {
  padding-top: 0;
  border-top: none;
}

.model-lab-metric__name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}

.model-lab-metric__formula {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text);
  margin-bottom: 4px;
}

.model-lab-metric__line {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 2px 0;
}

.model-lab-metric__table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-2);
  font-size: 0.8rem;
}

.model-lab-metric__table th,
.model-lab-metric__table td {
  text-align: left;
  padding: 4px 8px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}

.model-lab-metric__table th {
  color: var(--text);
  font-weight: 600;
}

.model-lab-note {
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}