.doc-section {
  width: 100%;
}

.section-body {
  margin: 0 0 20px;
  color: var(--page-muted);
  line-height: 1.6;
}

.two-col-grid,
.three-col-grid {
  display: grid;
  gap: 16px;
}

.two-col-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.concept-card {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border: 1px solid rgba(24, 33, 38, 0.08);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.62);
}

.concept-card strong {
  display: block;
  margin-bottom: 8px;
}

.concept-card p {
  margin: 0 0 12px;
  color: var(--page-muted);
  line-height: 1.5;
  font-size: 0.92rem;
}

.concept-card .inline-code {
  flex: 1;
}

.code-comment {
  color: #6a9955;
  font-style: italic;
}

.quantity-table {
  display: grid;
  gap: 0;
  border: 1px solid rgba(24, 33, 38, 0.08);
  border-radius: 14px;
  overflow: hidden;
}

.quantity-row {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(24, 33, 38, 0.06);
  font-size: 0.92rem;
}

.quantity-row:last-child {
  border-bottom: 0;
}

.quantity-header {
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--page-muted);
}

.quantity-row code {
  font-family: monospace;
  color: var(--brand-deep);
}

.rules-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.rule-item {
  padding: 16px;
  border: 1px solid rgba(24, 33, 38, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
}

.rule-item strong {
  display: block;
  margin-bottom: 6px;
}

.rule-item p {
  margin: 0;
  color: var(--page-muted);
  line-height: 1.5;
  font-size: 0.92rem;
}

.rule-item code {
  font-family: monospace;
  font-size: 0.88em;
  color: var(--brand-deep);
}

.resolution-note {
  margin-top: 16px;
}

@media (max-width: 900px) {
  .two-col-grid,
  .three-col-grid,
  .rules-grid {
    grid-template-columns: 1fr;
  }

  .quantity-row {
    grid-template-columns: 1fr 1fr;
  }

  .quantity-row span:last-child {
    grid-column: span 2;
    color: var(--page-muted);
    font-size: 0.85rem;
  }
}