/* ── Dropdown Filter (Story 3.4) ────────────────────────────────── */

/* Wrapper positions panel relative to chip */
.dropdown-filter__wrapper {
  position: relative;
  display: inline-flex;
  flex-direction: column;
}

/* Panel */
.dropdown-filter__panel {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 50;
  min-width: 260px;
  max-width: 360px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 8px 0;
  transition:
    opacity 0.15s ease,
    transform 0.15s ease;
}

.dropdown-filter__panel--closed {
  display: none;
}

.dropdown-filter__panel--open {
  display: block;
  animation: dropdown-slide-in 0.15s ease;
}

@keyframes dropdown-slide-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mode toggle (In List / Not In List) */
.dropdown-filter__mode-toggle {
  display: flex;
  gap: 0;
  padding: 4px 8px 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.dropdown-filter__mode-btn {
  flex: 1;
  padding: 4px 12px;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.15s ease;
}

.dropdown-filter__mode-btn:first-child {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.dropdown-filter__mode-btn:last-child {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  border-left: none;
}

.dropdown-filter__mode-btn--active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.dropdown-filter__mode-btn:hover:not(.dropdown-filter__mode-btn--active) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Search */
.dropdown-filter__search {
  padding: 8px;
}

.dropdown-filter__search-input {
  width: 100%;
  padding: 6px 10px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s ease;
}

.dropdown-filter__search-input:focus {
  border-color: var(--accent);
}

.dropdown-filter__search-input::placeholder {
  color: var(--text-muted);
}

/* Select All / Clear All row */
.dropdown-filter__select-all-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.dropdown-filter__selectall-btn,
.dropdown-filter__clearall-btn {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  background: transparent;
  color: var(--accent);
  border: none;
  cursor: pointer;
  padding: 2px 4px 2px 0;
  border-radius: var(--radius-sm);
  transition: background 0.15s ease;
}

.dropdown-filter__selectall-btn:hover,
.dropdown-filter__clearall-btn:hover {
  background: var(--bg-hover);
}

/* Options scrollable list */
.dropdown-filter__options-scroll {
  max-height: 240px;
  overflow-y: auto;
  padding: 4px 0;
  border: none;
  border-radius: 0;
  box-shadow: none;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.dropdown-filter__options-scroll::-webkit-scrollbar {
  width: 6px;
}

.dropdown-filter__options-scroll::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

.dropdown-filter__options-scroll::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 3px;
}

/* Checklist styling */
.dropdown-filter__checklist {
  display: flex;
  flex-direction: column;
  padding-left: 8px;
}

.dropdown-filter__option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 0;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.1s ease;
}

.dropdown-filter__option:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.dropdown-filter__checkbox {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

.dropdown-filter__option-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
  top: -2px; /* optical alignment */
}

/* Empty state */
.dropdown-filter__empty-msg {
  padding: 16px 12px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}

.dropdown-filter__empty-msg--hidden {
  display: none;
}

/* Chip badge (separator + count) */
.filter-chip__badge {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  font-size: 12px;
  font-weight: 500;
  margin-left: 0;
}

.filter-chip__badge--hidden {
  visibility: hidden;
}

/* Chip clear (X) button */
.filter-chip__clear {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  font-size: 0.625rem;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  margin-left: 2px;
  padding: 0;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.filter-chip__clear:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.filter-chip__clear--hidden {
  visibility: hidden;
}

/* ── Light theme overrides ──────────────────────────────────── */

[data-theme="light"] .dropdown-filter__panel {
  background: var(--bg-secondary);
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-lg);
}

[data-theme="light"] .dropdown-filter__search-input {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

[data-theme="light"] .dropdown-filter__option {
  color: var(--text-primary);
}

[data-theme="light"] .dropdown-filter__option:hover {
  background: var(--bg-secondary);
}

[data-theme="light"] .dropdown-filter__mode-btn {
  color: var(--text-secondary);
  border-color: var(--border-subtle);
}

[data-theme="light"]
  .dropdown-filter__mode-btn:hover:not(.dropdown-filter__mode-btn--active) {
  background: var(--bg-secondary);
}