/* =============================================================
   /compare/ — CDC platform comparison hub (Phase 4b)
   Page-scoped (linked via head_extra); uses the global --color-*
   design tokens, so it adapts to the dark-first palette + both themes.
   ============================================================= */

/* Honesty note / callout */
.compare-note {
  border: 1px solid var(--color-border-default);
  border-left: 3px solid var(--color-accent-primary);
  background: var(--color-accent-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-xl) 0;
}
.compare-note p {
  margin: 0;
  color: var(--color-text-secondary);
}
.compare-note strong {
  color: var(--color-text-primary);
}
.compare-note code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-accent-primary);
}
.compare-note--tight {
  margin: var(--space-lg) 0 0;
}

/* Comparison matrix */
.compare-matrix-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
}
.compare-matrix {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  min-width: 720px;
}
.compare-matrix th,
.compare-matrix td {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
  vertical-align: top;
}
.compare-matrix thead th {
  position: sticky;
  top: 0;
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border-strong);
  z-index: 1;
}
.compare-matrix thead th a {
  color: var(--color-accent-primary);
  text-decoration: none;
}
.compare-matrix thead th a:hover {
  text-decoration: underline;
}
.compare-matrix tbody th[scope="row"] {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  font-weight: 500;
  white-space: nowrap;
  background: var(--color-bg-secondary);
}
.compare-matrix tbody td {
  color: var(--color-text-secondary);
}
.compare-matrix tr:last-child th,
.compare-matrix tr:last-child td {
  border-bottom: 0;
}
/* The delivery-semantics row is the whole point — call it out */
.compare-matrix tr.is-highlight th[scope="row"] {
  color: var(--color-accent-primary);
}
.compare-matrix tr.is-highlight td {
  background: var(--color-accent-subtle);
  color: var(--color-text-primary);
}

/* Platform cards */
.compare-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}
.compare-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  scroll-margin-top: calc(var(--header-height) + var(--space-lg));
}
.compare-card h3 {
  margin: 0 0 var(--space-sm);
  color: var(--color-text-primary);
}
.compare-card__best {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
}
.compare-card__cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
@media (max-width: 520px) {
  .compare-card__cols {
    grid-template-columns: 1fr;
  }
}
.compare-card__col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin: 0 0 var(--space-sm);
  font-weight: 500;
}
.compare-card__col ul {
  margin: 0;
  padding-left: var(--space-md);
}
.compare-card__col li {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xs);
  line-height: 1.5;
}

/* Decision guide */
.compare-decide {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.compare-decide li {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}
.compare-decide strong {
  color: var(--color-text-primary);
}
.compare-decide a {
  color: var(--color-accent-primary);
  text-decoration: none;
  font-weight: 500;
}
.compare-decide a:hover {
  text-decoration: underline;
}

/* Related / go-deeper */
.compare-related__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}
.compare-related__card {
  display: block;
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  background: var(--color-bg-secondary);
  text-decoration: none;
  transition:
    border-color var(--transition-fast),
    transform var(--transition-fast);
}
.compare-related__card:hover {
  border-color: var(--color-accent-primary);
  transform: translateY(-2px);
}
.compare-related__card h3 {
  margin: 0 0 var(--space-2xs);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}
.compare-related__card p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}