.inventory-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  align-items: flex-start;
}

.filter-sidebar {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  position: sticky;
  top: calc(var(--header-height) + 1rem);
}
.filter-sidebar h3 { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.filter-group { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--color-border); }
.filter-group:last-child { border-bottom: none; }
.filter-group label { display: block; font-weight: 600; font-size: 0.85rem; margin-bottom: 0.4rem; }
.filter-group select,
.filter-group input { width: 100%; padding: 0.5rem 0.6rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-background); }
.filter-range { display: flex; gap: 0.5rem; align-items: center; }
.filter-checkbox { display: flex; align-items: center; gap: 0.5rem; font-size: 0.88rem; margin-bottom: 0.4rem; }
.filter-checkbox input { width: auto; }

.filter-toggle-btn { display: none; }
.filter-close-btn { display: none; }

.results-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; gap: 1rem; flex-wrap: wrap; }
.results-count { color: var(--color-text-muted); }
.sort-select { padding: 0.5rem 0.8rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-background); }

.empty-state { text-align: center; padding: 3rem 1rem; color: var(--color-text-muted); }

.pagination { display: flex; justify-content: center; gap: 0.4rem; margin-top: 2.5rem; }
.pagination button {
  min-width: 38px; height: 38px; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-background); cursor: pointer; color: var(--color-primary);
  display: inline-flex; align-items: center; justify-content: center;
}
.pagination button .icon { width: 16px; height: 16px; }
.pagination button.active { background: var(--color-primary); color: var(--color-primary-fg); border-color: var(--color-primary); }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

@media (max-width: 900px) {
  .inventory-layout { grid-template-columns: 1fr; }
  .filter-sidebar {
    position: fixed; inset: 0; z-index: 200; overflow-y: auto;
    border-radius: 0; transform: translateX(-100%); transition: transform 0.2s ease;
  }
  .filter-sidebar.open { transform: translateX(0); }
  .filter-toggle-btn { display: inline-flex; }
  .filter-close-btn { display: inline-flex; position: absolute; top: 1rem; right: 1rem; }
}