/* ==========================================================================
   Sidebar Filters — Unified
   ========================================================================== */

/* --- Sidebar Container --- */
.filters-sidebar {
  overflow: hidden;
  position: sticky;
  top: var(--space-6);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-default);
  background: var(--surface-card);
  color: var(--color-text-primary);
  transition: all 0.3s ease;
}

.tools-filter-hidden .tools-archive__sidebar {
  display: none;
}

.tools-filter-hidden .tools-archive__layout {
  grid-template-columns: 100% 1fr;
}

/* --- Sidebar Header --- */
.filters-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-default);
  background: var(--surface-card);
}

.filters-sidebar__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

.filters-sidebar__title svg {
  color: var(--color-primary);
}

.filters-sidebar__close {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: 4px;
  transition: var(--transition-fast);
}

.filters-sidebar__close:hover {
  color: var(--color-primary);
  background: var(--color-bg-tertiary);
}

/* --- Sidebar Content --- */
.filters-sidebar__content {
  flex-grow: 1;
  overflow-y: auto;
}

/* --- Filter Sections --- */
.filter-section {
  border-bottom: 1px solid var(--border-default);
  max-height: 360px;
  overflow: hidden;
}

.filter-section:last-child {
  border-bottom: none;
}

.filter-section__toggle {
  width: 100%;
  background-color: var(--surface-base);
  border: none;
  padding: var(--space-4);
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-primary);
}

.filter-section__toggle:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-primary);
}

.filter-section__icon {
  color: var(--text-muted);
  flex-shrink: 0;
}

.filter-section__title {
  font-weight: 600;
  flex-grow: 1;
}

.filter-section__count {
  color: var(--text-muted);
  font-size: 14px;
}

.filter-section__chevron {
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.filter-section__toggle[aria-expanded="true"] .filter-section__chevron,
.filter-section__toggle.expanded .filter-section__chevron {
  transform: rotate(180deg);
}

.filter-section__content {
  overflow: hidden;
  transition: all 0.2s ease-in-out;
}

.filter-section__content.collapsed {
  max-height: 0;
}

.filter-section__content.expanded {
  max-height: 500px;
}

/* --- Filter Options Container (Scrollable) --- */
.filter-options {
  padding: 0 var(--space-4) var(--space-4) var(--space-4);
  max-height: 320px;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  padding-right: 4px;

  /* Firefox scrollbar */
  scrollbar-width: thin;
  scrollbar-color: var(--border-default) transparent;
}

/* Webkit Scrollbar (Chrome, Safari, Edge) */
.filter-options::-webkit-scrollbar {
  width: 6px;
}

.filter-options::-webkit-scrollbar-track {
  background: transparent;
}

.filter-options::-webkit-scrollbar-thumb {
  background-color: var(--border-default);
  border-radius: 3px;
}

.filter-options::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-tertiary);
}

.filter-options__visible {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* --- Filter Option Items --- */
.filter-option {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: 6px;
  transition: var(--transition-fast);
  font-size: 13px;
}

.filter-option:hover {
  background: var(--color-bg-tertiary);
}

.filter-option--hidden {
  display: none;
}

.filter-checkbox {
  margin-right: var(--space-3);
  accent-color: var(--color-primary);
}

.filter-option__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-width: 0;
  font-size: 0.85rem;
}

.filter-option__name {
  white-space: normal;
  word-break: break-word;
  line-height: 1.3;
  padding-right: 8px;
  flex-grow: 1;
  color: var(--color-text-secondary);
}

.filter-option__count {
  flex-shrink: 0;
  margin-left: auto;
  color: var(--text-muted);
  font-size: 11px;
}

/* Active/Checked State */
.filter-option:has(input:checked) {
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-weight: 600;
  padding-left: 12px;
}

.filter-option:has(input:checked) .filter-option__count {
  color: var(--color-primary);
}

/* --- Show More Button --- */
.filter-show-more {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.85rem;
  cursor: pointer;
  padding: var(--space-2) 0;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: var(--transition-fast);
  margin-top: var(--space-2);
}

.filter-show-more:hover {
  color: var(--color-primary);
}

.filter-show-more svg {
  transition: var(--transition-fast);
}

/* --- Sidebar Footer --- */
.filters-sidebar__footer {
  padding: var(--space-4);
  border-top: 1px solid var(--border-default);
  background: var(--surface-card);
}

.applied-filters-summary {
  margin-bottom: var(--space-3);
}

.applied-filters-text {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.clear-all-filters-btn {
  width: 100%;
  background: var(--color-danger);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-default);
  padding: var(--space-3);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.clear-all-filters-btn:hover {
  background: var(--color-danger);
}

/* --- Mobile Sidebar --- */
@media (max-width: 768px) {
  .filter-options {
    max-height: 240px;
  }
}

@media (max-width: 1024px) {
  .filters-sidebar {
    position: fixed !important;
    top: 0;
    left: 0;
    width: 320px;
    height: 100vh;
    max-height: 100vh;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    border-radius: 0;
    border-left: none;
    background: var(--surface-card, var(--color-bg-primary));
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-default, var(--color-border));
  }

  .mobile-visible.tools-archive__sidebar .filters-sidebar {
    transform: translateX(0) !important;
    visibility: visible !important;
  }

  .filters-sidebar__close {
    display: flex;
  }

  .filters-sidebar__content {
    max-height: none;
    flex-grow: 1;
  }

  body.sidebar-open {
    overflow: hidden;
  }
}

/* --- Mobile Overlay --- */
.mobile-filters-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--color-overlay);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-in-out;
}

.mobile-filters-overlay.show {
  opacity: 1 !important;
  visibility: visible !important;
}