/* ==========================================================================
   Section 04: Broad Applicability — 3-Pillar Dimension Grid
   ========================================================================== */

.applicability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.applicability-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-dark);
  box-shadow: var(--shadow-pixel-md);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.applicability-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-pixel-lg);
}

.applicability-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: var(--border-dark);
}

.applicability-card.card-frameworks::before {
  background: var(--accent-orange);
}

.applicability-card.card-models::before {
  background: var(--accent-blue);
}

.applicability-card.card-domains::before {
  background: var(--accent-green);
}

.applicability-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.applicability-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
  line-height: 1.25;
}

.applicability-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.applicability-list li {
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.45;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 16px;
  position: relative;
}

.applicability-list li::before {
  content: '▪';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-orange);
  font-size: 0.95em;
}

.applicability-card.card-models .applicability-list li::before {
  color: var(--accent-blue);
}

.applicability-card.card-domains .applicability-list li::before {
  color: var(--accent-green);
}

.applicability-list li strong {
  font-weight: 700;
  color: var(--text-primary);
}

.applicability-list li span {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.applicability-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--border-medium);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

@media (max-width: 900px) {
  .applicability-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
}