/* ===== Sidebar ===== */
.sidebar {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.sidebar__title {
  margin: 0;
  padding: 0.7rem 0.9rem;
  background: var(--sage);
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.category-list {
  display: flex;
  flex-direction: column;
}

.category-item + .category-item {
  border-top: 1px solid var(--border);
}

.category-btn {
  display: block;
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: none;
  background: var(--bg-elevated);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 400;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.category-btn:hover {
  background: var(--cream);
  color: var(--ink);
}

.category-btn.is-active {
  color: var(--ink);
  font-weight: 700;
  background: var(--primary-soft);
}

.category-btn__marker {
  float: right;
  color: var(--text-light);
  font-size: 0.7rem;
  line-height: 1.4;
}

.category-item.is-open > .category-btn .category-btn__marker {
  transform: rotate(90deg);
  display: inline-block;
}

.category-children {
  display: none;
  border-top: 1px solid var(--border);
}

.category-item.is-open > .category-children {
  display: block;
}

.category-children .category-btn {
  padding-left: 0.9rem;
}

.sidebar-toggle-mobile {
  display: none;
  width: 100%;
  margin-bottom: 0.75rem;
  min-height: 2.5rem;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.85rem;
}

/* ===== Toolbar ===== */
.catalog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.15rem;
  font-size: 0.8125rem;
}

.toolbar-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem 0.55rem;
}

.toolbar-label {
  color: var(--text);
  font-weight: 400;
  white-space: nowrap;
}

.sort-buttons,
.page-size {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.sort-btn,
.page-size__btn {
  min-height: 1.85rem;
  padding: 0.3rem 0.65rem;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.sort-btn:hover,
.page-size__btn:hover {
  color: var(--accent);
}

.sort-btn.is-active,
.page-size__btn.is-active {
  background: var(--sage);
  color: var(--white);
}

.catalog-meta {
  font-size: 0.8125rem;
  color: var(--text-light);
  margin-bottom: 0.85rem;
}

/* ===== Product grid ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: inherit;
  transition: box-shadow var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.product-card:hover {
  transform: translateY(-0.15rem);
  box-shadow: var(--shadow-hover);
}

.product-card__media {
  aspect-ratio: 1 / 1;
  background: var(--cream);
  display: grid;
  place-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 0.55rem;
}

.product-card__placeholder {
  width: 2.25rem;
  height: 2.25rem;
  opacity: 0.4;
  color: var(--sage);
}

.product-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.7rem 0.65rem 0.8rem;
  flex: 1;
  text-align: center;
}

.product-card__title {
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.35;
  text-transform: uppercase;
  color: var(--ink);
}

.product-card__desc {
  font-size: 0.6875rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card__footer {
  margin-top: auto;
  padding-top: 0.3rem;
  display: flex;
  justify-content: center;
}

.btn-request {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 7rem;
  min-height: 1.9rem;
  padding: 0.4rem 0.75rem;
  border: none;
  background: var(--sage);
  color: var(--white);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.22s ease, transform 0.22s ease;
}

.product-card:hover .btn-request,
.btn-request:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

/* ===== States ===== */
.catalog-state {
  grid-column: 1 / -1;
  display: grid;
  place-items: center;
  gap: 0.65rem;
  min-height: 12rem;
  padding: 2rem 1rem;
  border: 1px dashed var(--border);
  text-align: center;
}

.catalog-state__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.catalog-state__text {
  font-size: 0.875rem;
  color: var(--text-muted);
  max-width: 28rem;
}

.spinner {
  width: 2rem;
  height: 2rem;
  border: 0.18rem solid var(--border);
  border-top-color: var(--sage);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
}

.skeleton-card {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.skeleton-card__media,
.skeleton-card__line {
  background: linear-gradient(90deg, var(--cream) 25%, var(--sand) 50%, var(--cream) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s ease-in-out infinite;
}

.skeleton-card__media {
  aspect-ratio: 1 / 1;
}

.skeleton-card__body {
  padding: 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: center;
}

.skeleton-card__line {
  height: 0.6rem;
  width: 85%;
}

.skeleton-card__line--cta {
  width: 45%;
  height: 1.8rem;
  margin-top: 0.2rem;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (max-width: 64rem) {
  .product-grid,
  .skeleton-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .sidebar-toggle-mobile {
    display: inline-flex;
  }

  .sidebar {
    display: none;
  }

  .sidebar.is-open {
    display: block;
  }
}

@media (max-width: 40rem) {
  .product-grid,
  .skeleton-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .catalog-toolbar {
    align-items: stretch;
  }

  .toolbar-group {
    width: 100%;
  }

  .page-size {
    overflow-x: auto;
    max-width: 100%;
  }
}

@media (max-width: 26rem) {
  .product-grid,
  .skeleton-grid {
    grid-template-columns: 1fr;
  }
}