/* ─── Catalog Layout ─── */
.catalog-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: var(--sp-8);
  padding-top: calc(var(--navbar-h) + var(--sp-8));
  padding-bottom: var(--sp-16);
  align-items: start;
}

/* ─── Filters Sidebar ─── */
.filters-sidebar {
  position: sticky;
  top: calc(var(--navbar-h) + var(--sp-4));
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  max-height: calc(100vh - var(--navbar-h) - var(--sp-8));
  overflow-y: auto;
}

.filters-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--txt-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--border-subtle);
}

.filter-group { display: flex; flex-direction: column; gap: var(--sp-3); }
.filter-group__title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--txt-muted);
}

.filter-options { display: flex; flex-direction: column; gap: var(--sp-1); }

.filter-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--t-fast);
  border: 1px solid transparent;
}
.filter-option:hover {
  background: var(--bg-surface-2);
  border-color: var(--border-subtle);
}
.filter-option.active {
  background: var(--clr-cyan-glow);
  border-color: var(--border-cyan);
  color: var(--clr-cyan);
}
.filter-option__label { font-size: 0.85rem; }
.filter-option__count {
  font-size: 0.72rem;
  color: var(--txt-muted);
  font-family: var(--font-mono);
}

.filter-check {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--txt-secondary);
  transition: color var(--t-fast);
  user-select: none;
}
.filter-check:hover { color: var(--txt-primary); }
.filter-check input[type="checkbox"] { display: none; }
.check-box {
  width: 18px;
  height: 18px;
  border: 1px solid var(--border-muted);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--t-fast);
  background: transparent;
}
.filter-check input:checked + .check-box {
  background: linear-gradient(135deg, var(--clr-cyan), var(--clr-violet));
  border-color: transparent;
}
.filter-check input:checked + .check-box::after {
  content: '';
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--bg-base);
  border-bottom: 2px solid var(--bg-base);
  transform: rotate(-45deg) translateY(-1px);
}

/* Price range */
.price-range { display: flex; flex-direction: column; gap: var(--sp-3); }
.price-inputs {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.8rem;
  color: var(--txt-muted);
}
.price-input {
  flex: 1;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  color: var(--txt-primary);
  font-size: 0.8rem;
  outline: none;
  transition: border-color var(--t-fast);
  min-width: 0;
}
.price-input:focus { border-color: var(--border-cyan); }

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg-surface-3);
  border-radius: 2px;
  outline: none;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-cyan), var(--clr-violet));
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0,245,255,0.5);
  transition: transform var(--t-fast);
}
.range-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

/* ─── Catalog Toolbar ─── */
.catalog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
  padding: var(--sp-3) var(--sp-4);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}
.catalog-toolbar__left, .catalog-toolbar__right {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.results-count {
  font-size: 0.82rem;
  color: var(--txt-muted);
  font-family: var(--font-mono);
}

.sort-select {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: var(--txt-secondary);
  font-size: 0.82rem;
  outline: none;
  cursor: pointer;
  transition: border-color var(--t-fast);
}
.sort-select:focus { border-color: var(--border-cyan); color: var(--txt-primary); }

.view-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg-surface-2);
  border-radius: var(--radius-sm);
  padding: 2px;
}
.view-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 4px;
  color: var(--txt-muted);
  transition: all var(--t-fast);
}
.view-btn [data-lucide] { width: 15px; height: 15px; }
.view-btn.active, .view-btn:hover {
  background: var(--bg-surface-3);
  color: var(--clr-cyan);
}

.filters-mobile-toggle { display: none; }

/* ─── Responsive ─── */
@media (max-width: 960px) {
  .catalog-layout {
    grid-template-columns: 1fr;
  }
  .filters-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 90vw);
    border-radius: 0;
    z-index: var(--z-drawer);
    transform: translateX(-100%);
    transition: transform var(--t-base);
    max-height: 100vh;
  }
  .filters-sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 40px rgba(0,0,0,0.5);
  }
  .filters-mobile-toggle { display: flex; }
}