/* --- Curated Resource Vault (Monochrome Engineering Spec) --- */
.resource-vault-section {
  margin: 3.5rem 0;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color, #27272a);
}

.resource-vault-section .section-header {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .resource-vault-section .section-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.resource-vault-section .section-title {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fafafa;
  margin: 0;
}

.vault-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.vault-filter-btn {
  background: transparent;
  color: #a1a1aa;
  border: 1px solid #27272a;
  border-radius: 4px;
  padding: 0.35rem 0.75rem;
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.75rem;
  cursor: pointer;
  transition: color 40ms ease, border-color 40ms ease, background-color 40ms ease;
}

.vault-filter-btn:hover {
  color: #ffffff;
  border-color: #52525b;
}

.vault-filter-btn.active {
  background: #ffffff;
  color: #09090b;
  border-color: #ffffff;
  font-weight: 500;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.resource-card {
  display: flex;
  flex-direction: column;
  background: #09090b;
  border: 1px solid #27272a;
  border-radius: 6px;
  padding: 1.25rem;
  transition: border-color 40ms ease;
}

.resource-card:hover {
  border-color: #71717a;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.7rem;
}

.badge-subtle {
  background: #18181b;
  color: #d4d4d8;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  border: 1px solid #27272a;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.category-tag {
  color: #71717a;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: #f4f4f5;
  margin: 0 0 0.5rem 0;
  line-height: 1.35;
}

.card-desc {
  font-size: 0.85rem;
  line-height: 1.5;
  color: #a1a1aa;
  margin: 0 0 1.25rem 0;
  flex-grow: 1;
}

.card-action {
  align-self: flex-start;
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.75rem;
  font-weight: 500;
  color: #e4e4e7;
  text-decoration: none;
  border-bottom: 1px solid #3f3f46;
  padding-bottom: 2px;
  transition: color 40ms ease, border-color 40ms ease;
}

.card-action:hover {
  color: #ffffff;
  border-color: #ffffff;
}