/* ============================================================
   Home Office OS -- Modules Page
   Section dividers, diff cards, data matrix
   ============================================================ */

/* ════════════════════════════════════════
   SECTION DIVIDERS
   ════════════════════════════════════════ */

.modules-divider {
  text-align: center;
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.modules-divider::before {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-teal));
  margin: 0 auto var(--space-xl);
  border-radius: var(--radius-full);
}

.modules-divider h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--space-sm);
}

.modules-divider p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ════════════════════════════════════════
   DIFF CARDS (engine categories + differentiators)
   ════════════════════════════════════════ */

.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.diff-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: transform var(--transition-slow), border-color var(--transition-slow);
}

.diff-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
}

.diff-card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.diff-card-value {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.diff-card-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.diff-card-desc {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  line-height: var(--line-height-relaxed);
}

/* ════════════════════════════════════════
   DATA REQUIREMENTS MATRIX
   ════════════════════════════════════════ */

.matrix-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-xl) 0;
}

.matrix-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--font-size-xs);
  min-width: 900px;
}

.matrix-table th {
  background: var(--bg-surface);
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border-primary);
  position: sticky;
  top: 0;
  z-index: 2;
  white-space: nowrap;
}

.matrix-table th:first-child {
  position: sticky;
  left: 0;
  z-index: 3;
  min-width: 140px;
}

.matrix-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  text-align: center;
  vertical-align: middle;
}

.matrix-table td:first-child {
  text-align: left;
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  background: var(--bg-card);
  position: sticky;
  left: 0;
  z-index: 1;
}

.matrix-table tr:hover td {
  background: rgba(59, 130, 246, 0.04);
}

.matrix-table tr:hover td:first-child {
  background: rgba(59, 130, 246, 0.08);
}

.matrix-check {
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}

.matrix-partial {
  color: var(--color-warning);
}

.matrix-empty {
  color: rgba(255, 255, 255, 0.1);
}

/* ════════════════════════════════════════
   PRINT STYLES
   ════════════════════════════════════════ */

@media print {
  .site-header,
  .site-footer {
    display: none;
  }

  body {
    background: white;
    color: #1a1a1a;
  }

  .diff-card {
    break-inside: avoid;
    border: 1px solid #ddd;
    box-shadow: none;
  }

  .diff-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .modules-divider::before {
    display: none;
  }

  .text-gradient {
    -webkit-text-fill-color: initial;
    background: none;
    color: #1a1a1a;
  }
}

/* ════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════ */

@media (max-width: 768px) {
  .diff-grid {
    grid-template-columns: 1fr 1fr;
  }

  .matrix-table {
    font-size: 0.65rem;
  }
}

@media (max-width: 480px) {
  .diff-grid {
    grid-template-columns: 1fr;
  }
}