.major-resources {
  border-top: 1px solid var(--color-line);
  background: var(--color-surface-soft);
}

.major-resources--supporting {
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
  background: #f8fafb;
}

.support-resource-drawer {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.support-resource-drawer > summary {
  display: flex;
  min-height: 5.25rem;
  cursor: pointer;
  list-style: none;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.15rem 1.25rem;
  color: var(--color-primary-dark);
}

.support-resource-drawer > summary::-webkit-details-marker { display: none; }

.support-resource-drawer > summary:hover {
  background: var(--color-surface-soft);
}

.support-resource-drawer > summary:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: -3px;
}

.support-resource-drawer > summary > span:first-child {
  display: grid;
  gap: 0.2rem;
}

.support-resource-drawer > summary strong {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.support-resource-drawer > summary small {
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  font-weight: 400;
}

.support-resource-drawer__icon {
  display: grid;
  width: 2rem;
  height: 2rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--color-line-strong);
  border-radius: 50%;
  color: var(--color-primary);
  font-size: 1.25rem;
  transition: transform 160ms ease;
}

.support-resource-drawer[open] .support-resource-drawer__icon {
  transform: rotate(45deg);
}

.support-resource-drawer__body {
  padding: 1.25rem;
  border-top: 1px solid var(--color-line);
}

.major-resources__boundary {
  max-width: 900px;
  color: var(--color-ink-soft);
}

.major-resource-group + .major-resource-group {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-line);
}

.major-resource-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.major-resource-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: #fff;
}

.major-resource-card h4 {
  margin: 0.75rem 0 0.45rem;
  overflow-wrap: anywhere;
}

.major-resource-card p {
  margin-bottom: 0.55rem;
}

.major-resource-card__meta {
  color: var(--color-ink-soft);
  font-size: 0.86rem;
}

.major-resource-card a {
  margin-top: auto;
  padding-top: 0.55rem;
  font-weight: 700;
}

@media (max-width: 960px) {
  .major-resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .major-resource-grid { grid-template-columns: 1fr; }
  .support-resource-drawer > summary { align-items: start; gap: 0.8rem; }
}

@media (max-width: 480px) {
  .major-resource-card { padding: 0.95rem; }
  .major-resources--supporting { padding-block: 1rem; }
  .support-resource-drawer > summary,
  .support-resource-drawer__body { padding: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .major-resource-card { scroll-behavior: auto; }
  .support-resource-drawer__icon { transition: none; }
}