.filter-chip {
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  transition: all 0.15s ease;
  white-space: nowrap;
  border: 1.5px solid currentColor;
  background: transparent;
  cursor: pointer;
}

.filter-chip:focus {
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.3);
  outline: none;
}

.filter-chip.active {
  background-color: #0f1117 !important;
  border-color: #38bdf8 !important;
  color: #38bdf8 !important;
}

[data-bs-theme="dark"] .filter-chip.active {
  background-color: #38bdf8 !important;
  border-color: #38bdf8 !important;
  color: #0f1117 !important;
}

.controls-wrapper {
  background-color: var(--bs-body-bg);
  border-radius: 0.5rem;
  border: 1px solid var(--bs-border-color, rgba(128, 128, 128, 0.2));
  padding: 1rem;
  margin-bottom: 1.25rem;
}

.controls-search-row,
.controls-bottom-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.controls-search-row {
  margin-bottom: 0.75rem;
}

.controls-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.6rem;
}

.filter-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--bs-secondary-color, #6c757d);
  align-self: center;
  white-space: nowrap;
}

.filter-divider {
  width: 1px;
  height: 1.4rem;
  background-color: var(--bs-border-color, rgba(128, 128, 128, 0.25));
  align-self: center;
  flex-shrink: 0;
}

.resource-search-wrap {
  flex: 1 1 280px;
  min-width: 200px;
}

.resource-search-wrap .input-group-text,
.resource-search-wrap input[type="text"],
#type-filter,
#sort-select {
  background-color: var(--bs-body-bg);
  border-color: var(--bs-border-color, rgba(128, 128, 128, 0.25));
  color: var(--bs-body-color);
}

.resource-search-wrap input[type="text"] {
  font-size: 0.85rem;
}

.resource-search-wrap .input-group-text {
  color: var(--bs-secondary-color);
}

.resource-search-wrap input[type="text"]:focus,
#type-filter:focus,
#sort-select:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
  outline: none;
}

#type-filter,
#sort-select {
  border: 1.5px solid var(--bs-border-color, rgba(128, 128, 128, 0.25));
  border-radius: 0.375rem;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.25rem 1.8rem 0.25rem 0.75rem;
  max-width: 180px;
  cursor: pointer;
}

.view-toggle-label {
  cursor: pointer;
  border-radius: 0.375rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.78rem;
  color: var(--bs-body-color);
  border: 1.5px solid var(--bs-border-color, rgba(128, 128, 128, 0.25));
  transition: all 0.15s ease;
  user-select: none;
}

.btn-check:checked + .view-toggle-label {
  background-color: #0f1117;
  border-color: #38bdf8;
  color: #38bdf8;
}

[data-bs-theme="dark"] .btn-check:checked + .view-toggle-label {
  background-color: #38bdf8;
  border-color: #38bdf8;
  color: #0f1117;
}

.catalog-counter {
  font-size: 0.8rem;
  color: var(--bs-secondary-color, #6c757d);
  margin-left: auto;
  white-space: nowrap;
}

.catalog-counter strong {
  color: var(--bs-body-color);
}

.catalog-results {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 0.85rem;
}

@media (min-width: 576px) {
  .catalog-results {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 992px) {
  .catalog-results {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.catalog-view-list .catalog-results {
  grid-template-columns: 1fr;
}

.catalog-item[hidden] {
  display: none !important;
}

.resource-card {
  border: 1px solid var(--bs-border-color, rgba(128, 128, 128, 0.2));
  border-radius: 0.5rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  background-color: var(--bs-body-bg);
}

.resource-card:hover,
.resource-card:focus-within {
  border-color: #38bdf8;
  box-shadow: 0 2px 10px rgba(56, 189, 248, 0.15);
}

.resource-card .card-body {
  padding: 0.85rem;
}

.resource-meta-row,
.resource-title-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-start;
}

.resource-meta-row {
  margin-bottom: 0.55rem;
}

.resource-title-row {
  margin-bottom: 0.3rem;
  align-items: baseline;
}

.resource-language-chips {
  display: flex;
  gap: 0.18rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.resource-title {
  min-width: 0;
}

.resource-title a {
  color: var(--bs-body-color) !important;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
  line-height: 1.35;
}

.resource-title a:hover,
.resource-title a:focus {
  color: #0f1117 !important;
  text-decoration: underline;
}

[data-bs-theme="dark"] .resource-title a:hover,
[data-bs-theme="dark"] .resource-title a:focus {
  color: #38bdf8 !important;
}

.resource-type {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 0.25rem;
  padding: 0.2em 0.55em;
  flex-shrink: 0;
}

.chip {
  display: inline-block;
  padding: 0.1rem 0.42rem;
  font-size: 0.66rem;
  font-weight: 500;
  border-radius: 999px;
  margin: 0.08rem 0.1rem 0.08rem 0;
  white-space: nowrap;
  line-height: 1.5;
}

.chip-r {
  background-color: rgba(26, 87, 157, 0.13);
  color: #1a579d;
  border: 1px solid rgba(26, 87, 157, 0.22);
}

.chip-python {
  background-color: rgba(55, 125, 34, 0.13);
  color: #3a7a20;
  border: 1px solid rgba(55, 125, 34, 0.22);
}

.chip-julia {
  background-color: rgba(149, 57, 191, 0.13);
  color: #8b33b3;
  border: 1px solid rgba(149, 57, 191, 0.22);
}

.chip-other {
  background-color: rgba(108, 117, 125, 0.1);
  color: #555f6a;
  border: 1px solid rgba(108, 117, 125, 0.18);
}

.chip-cat {
  background-color: rgba(26, 42, 74, 0.07);
  color: var(--bs-body-color);
  border: 1px solid rgba(26, 42, 74, 0.14);
}

[data-bs-theme="dark"] .chip-r {
  background-color: rgba(26, 87, 157, 0.28);
  color: #7ab8f5;
  border-color: rgba(26, 87, 157, 0.4);
}

[data-bs-theme="dark"] .chip-python {
  background-color: rgba(55, 125, 34, 0.28);
  color: #90d070;
  border-color: rgba(55, 125, 34, 0.4);
}

[data-bs-theme="dark"] .chip-julia {
  background-color: rgba(149, 57, 191, 0.28);
  color: #d49bf5;
  border-color: rgba(149, 57, 191, 0.4);
}

[data-bs-theme="dark"] .chip-other {
  background-color: rgba(108, 117, 125, 0.2);
  color: #adb5bd;
  border-color: rgba(108, 117, 125, 0.3);
}

[data-bs-theme="dark"] .chip-cat {
  background-color: rgba(56, 189, 248, 0.08);
  color: #7dd3fc;
  border-color: rgba(56, 189, 248, 0.2);
}

.cat-chips {
  line-height: 1.9;
}

.category-expand-toggle {
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--bs-secondary-color, #6c757d);
  background: transparent;
  border: 1px solid var(--bs-border-color, rgba(128, 128, 128, 0.2));
  border-radius: 999px;
  padding: 0.08rem 0.38rem;
  cursor: pointer;
  line-height: 1.5;
  vertical-align: middle;
  transition: all 0.12s ease;
  white-space: nowrap;
}

.category-expand-toggle:hover,
.category-expand-toggle:focus {
  border-color: #0f1117;
  color: #0f1117;
}

[data-bs-theme="dark"] .category-expand-toggle:hover,
[data-bs-theme="dark"] .category-expand-toggle:focus {
  border-color: #38bdf8;
  color: #38bdf8;
}

.resource-desc {
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--bs-secondary-color, #6c757d);
  margin: 0.3rem 0 0.25rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.25s ease, opacity 0.2s ease;
}

.catalog-view-grid .resource-card:hover .resource-desc,
.catalog-view-grid .resource-card:focus-within .resource-desc {
  max-height: 7rem;
  opacity: 1;
}

.catalog-view-list .resource-desc {
  max-height: none;
  opacity: 1;
}

.resource-date {
  font-size: 0.68rem;
  color: var(--bs-secondary-color, #6c757d);
  white-space: nowrap;
  flex-shrink: 0;
}

#no-results-msg {
  display: none;
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--bs-secondary-color, #6c757d);
  font-size: 0.9rem;
}

#catalog-pagination {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
}

#catalog-pagination .pagination {
  gap: 0.2rem;
  flex-wrap: wrap;
  justify-content: center;
}

#catalog-pagination .page-link {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.65rem;
  border-radius: 0.375rem !important;
  border: 1.5px solid var(--bs-border-color, rgba(128, 128, 128, 0.25));
  color: var(--bs-body-color);
  background-color: var(--bs-body-bg);
  transition: all 0.15s ease;
  min-width: 2rem;
  text-align: center;
}

#catalog-pagination .page-link:hover {
  border-color: #38bdf8;
  color: #38bdf8;
  background-color: rgba(56, 189, 248, 0.08);
}

#catalog-pagination .page-item.active .page-link {
  background-color: #38bdf8;
  border-color: #38bdf8;
  color: #0f1117;
}

#catalog-pagination .page-item.disabled .page-link {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

@media (max-width: 768px) {
  .resource-title-row,
  .resource-meta-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .resource-language-chips {
    justify-content: flex-start;
  }

  .catalog-counter {
    margin-left: 0;
  }
}