/*
 * ListFilter — shared list-filter toolbar.
 *
 * Styled against the design-system --color-* / --space-* tokens, never Bootstrap's
 * --bs-* custom properties: a rule written as var(--bs-primary) does not fail loudly,
 * it silently falls back to Bootstrap indigo inside a brand-brown app (see
 * int_lms/CLAUDE.md).
 */

.lf {
  margin-bottom: var(--space-3);
}

.lf-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ── toggle ─────────────────────────────────────────────────────────────── */

.lf-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border-color: var(--color-border-strong);
  color: var(--color-fg);
}

.lf-toggle:hover,
.lf-toggle:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-surface-raised);
}

.lf-toggle-count {
  background-color: var(--color-primary);
  color: var(--color-inverse-fg);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: 0.1em 0.5em;
}

/* ── panel ──────────────────────────────────────────────────────────────── */

.lf-panel {
  min-width: 17rem;
  max-width: 22rem;
  padding: 0;
  border-color: var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-3);
  background-color: var(--color-surface);
  overflow: hidden;
}

.lf-view {
  max-height: 22rem;
  overflow-y: auto;
  padding: var(--space-2);
}

/* ── level 2: facet list ────────────────────────────────────────────────── */

.lf-facet-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-fg);
  font-size: var(--font-size-sm);
  text-align: left;
}

.lf-facet-row:hover,
.lf-facet-row:focus-visible {
  background-color: var(--color-surface-raised);
}

.lf-facet-label {
  font-weight: var(--font-weight-medium);
}

.lf-facet-summary {
  margin-left: auto;
  color: var(--color-muted-fg);
  font-size: var(--font-size-xs);
}

/* The one signal that a facet is carrying a selection while its options are hidden. */
.lf-facet-summary.is-set {
  color: var(--color-accent-fg);
  font-weight: var(--font-weight-semibold);
}

.lf-chevron {
  color: var(--color-muted-fg);
  font-size: var(--font-size-xs);
}

/* ── level 3: option list ───────────────────────────────────────────────── */

.lf-back {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-1);
  border: 0;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  background: transparent;
  color: var(--color-muted-fg);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.lf-back:hover,
.lf-back:focus-visible {
  color: var(--color-primary);
}

.lf-option-search {
  padding: var(--space-1) var(--space-2) var(--space-2);
}

.lf-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-fg);
  font-size: var(--font-size-sm);
  cursor: pointer;
  margin-bottom: 0;
}

.lf-option:hover {
  background-color: var(--color-surface-raised);
}

.lf-option .form-check-input {
  margin-top: 0;
  flex: 0 0 auto;
}

.lf-option .form-check-input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.lf-option-label {
  overflow-wrap: anywhere;
}

.lf-empty {
  margin: 0;
  padding: var(--space-3);
  color: var(--color-muted-fg);
  font-size: var(--font-size-sm);
}

/* ── footer ─────────────────────────────────────────────────────────────── */

.lf-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-raised);
}

.lf-clear {
  color: var(--color-muted-fg);
  text-decoration: none;
  padding-left: 0;
}

.lf-clear:hover {
  color: var(--color-error);
}

.lf-apply {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-inverse-fg);
  font-weight: var(--font-weight-semibold);
  min-width: 5rem;
}

.lf-apply:hover,
.lf-apply:focus-visible {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* ── search box ─────────────────────────────────────────────────────────── */

.lf-search-wrap {
  position: relative;
  flex: 0 1 16rem;
}

.lf-search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-muted-fg);
  font-size: var(--font-size-sm);
  pointer-events: none;
}

.lf-search-input {
  padding-left: calc(var(--space-8));
  background-color: var(--color-surface-sunken);
  border-color: var(--color-border);
  color: var(--color-fg);
}

.lf-search-input:focus {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem color-mix(in srgb, var(--focus-ring) 25%, transparent);
}

/* ── applied-filter chips ───────────────────────────────────────────────── */

.lf-chips {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.lf-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.15rem var(--space-2);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  background-color: var(--color-surface-raised);
  color: var(--color-fg);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-normal);
}

.lf-chip-facet {
  color: var(--color-muted-fg);
}

.lf-chip-value {
  font-weight: var(--font-weight-medium);
}

.lf-chip-x {
  display: inline-flex;
  align-items: center;
  padding: 0;
  margin-left: var(--space-1);
  border: 0;
  background: transparent;
  color: var(--color-muted-fg);
  line-height: 1;
}

.lf-chip-x:hover,
.lf-chip-x:focus-visible {
  color: var(--color-error);
}

.lf-chip-clear {
  border-style: dashed;
  color: var(--color-muted-fg);
}

.lf-chip-clear:hover {
  color: var(--color-error);
  border-color: var(--color-error);
}

/* ── status + pager ─────────────────────────────────────────────────────── */

.lf-status {
  margin: var(--space-2) 0 0;
  color: var(--color-muted-fg);
  font-size: var(--font-size-xs);
  min-height: 1em;
}

.lf-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
}

.lf-pager-label {
  color: var(--color-muted-fg);
  font-size: var(--font-size-sm);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 575.98px) {
  .lf-search-wrap { flex-basis: 100%; }
  .lf-panel { max-width: calc(100vw - var(--space-8)); }
}