/* MetricLab Design System: Section System
   Owns canonical section composition only. Existing page-family classes remain
   compatibility hooks until they are deliberately migrated to this API. */
:root {
  --section-container: var(--ml-container);
  --section-container-wide: var(--ml-container-wide);
  --section-reading-width: var(--ml-container-readable);
  --section-padding-inline: var(--ml-container-padding);
  --section-padding-compact: var(--space-xl);
  --section-padding-standard: var(--space-section);
  --section-padding-highlighted: var(--space-3xl);
  --section-header-gap: var(--space-sm);
  --section-content-gap: var(--space-xl);
  --section-actions-gap: var(--space-sm);
  --section-footer-gap: var(--space-lg);
  --section-grid-gap: var(--space-lg);
  --section-divider-color: var(--ml-border-soft);
  --section-divider-width: 1px;
  --section-surface-page: transparent;
  --section-surface-subtle: var(--ml-surface-alt);
  --section-surface-raised: var(--ml-surface-elevated);
  --section-surface-accent: color-mix(
    in srgb,
    var(--ml-primary) 6%,
    var(--ml-surface)
  );
  --section-border-color: var(--ml-border);
  --section-radius: var(--radius-panel);
}

.ml-section-block {
  width: 100%;
  min-width: 0;
  padding-block: var(--section-padding-standard);
  background: var(--section-surface-page);
  color: var(--ml-text);
}

.ml-section-block--compact {
  padding-block: var(--section-padding-compact);
}

.ml-section-block--standard {
  padding-block: var(--section-padding-standard);
}

.ml-section-block--highlighted {
  padding-block: var(--section-padding-highlighted);
}

.ml-section-inner {
  width: min(
    calc(100% - (var(--section-padding-inline) * 2)),
    var(--section-container)
  );
  margin-inline: auto;
}

.ml-section-inner--wide {
  max-width: var(--section-container-wide);
}

.ml-section-inner--reading {
  max-width: var(--section-reading-width);
}

.ml-section-inner--full {
  width: 100%;
  max-width: none;
}

.ml-section-header,
.ml-section-content,
.ml-section-actions,
.ml-section-footer {
  min-width: 0;
}

.ml-section-header {
  display: flex;
  flex-direction: column;
  gap: var(--section-header-gap);
  max-width: var(--section-reading-width);
  margin-bottom: var(--section-content-gap);
}

.ml-section-eyebrow,
.ml-section-title,
.ml-section-intro {
  margin: 0;
}

.ml-section-eyebrow {
  color: var(--ml-primary);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  line-height: var(--line-snug);
  text-transform: uppercase;
}

.ml-section-title {
  color: var(--ml-text);
  font-size: var(--text-xl);
  font-weight: var(--weight-extrabold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--line-snug);
  text-wrap: balance;
}

.ml-section-intro {
  color: var(--ml-text-muted);
  font-size: var(--text-md);
  line-height: var(--line-relaxed);
}

.ml-section-content {
  display: flex;
  flex-direction: column;
  gap: var(--section-content-gap);
}

.ml-section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--section-actions-gap);
  align-items: center;
}

:is(p, .ml-section-content) + .ml-section-actions {
  margin-top: var(--space-sm);
}

.ml-section-footer {
  margin-top: var(--section-footer-gap);
}

.ml-section-block--center .ml-section-header {
  align-items: center;
  margin-inline: auto;
  text-align: center;
}

.ml-section-block--center .ml-section-actions {
  justify-content: center;
}

.ml-section-block--split .ml-section-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: var(--section-grid-gap);
  align-items: start;
}

.ml-section-block--split .ml-section-header {
  margin-bottom: 0;
}

.ml-section-surface--subtle,
.ml-section-surface--raised,
.ml-section-surface--accent {
  border: 1px solid var(--section-border-color);
  border-radius: var(--section-radius);
}

.ml-section-surface--subtle {
  background: var(--section-surface-subtle);
}

.ml-section-surface--raised {
  background: var(--section-surface-raised);
}

.ml-section-surface--accent {
  background: var(--section-surface-accent);
}

.ml-section-divider {
  border: 0;
  border-top: var(--section-divider-width) solid var(--section-divider-color);
}

.ml-section-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--section-grid-gap);
  min-width: 0;
}

.ml-section-grid--2,
.ml-section-grid--split,
.ml-section-grid--comparison,
.ml-section-grid--before-after {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ml-section-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ml-section-grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ml-section-grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
}

.ml-section-grid--sidebar {
  grid-template-columns: minmax(0, 2fr) minmax(14rem, 0.7fr);
}

@media (width <= 900px) {
  .ml-section-grid--3,
  .ml-section-grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ml-section-grid--sidebar {
    grid-template-columns: minmax(0, 1fr) minmax(12rem, 0.5fr);
  }
}

@media (width <= 720px) {
  :root {
    --section-padding-inline: var(--mobile-container-padding);
    --section-padding-compact: var(--space-lg);
    --section-padding-standard: var(--mobile-section-gap);
    --section-padding-highlighted: var(--space-2xl);
    --section-content-gap: var(--space-lg);
    --section-grid-gap: var(--mobile-card-gap);
  }

  .ml-section-block--split .ml-section-inner,
  .ml-section-grid--2,
  .ml-section-grid--3,
  .ml-section-grid--4,
  .ml-section-grid--split,
  .ml-section-grid--sidebar,
  .ml-section-grid--comparison,
  .ml-section-grid--before-after {
    grid-template-columns: 1fr;
  }

  .ml-section-block--split .ml-section-header {
    margin-bottom: var(--section-content-gap);
  }
}