/* ─────────────────────────────────────────────────────────
   FILTERS — layered channel/vertical/tag chip navigation
   for collection pages (Reports, Articles).
   ─────────────────────────────────────────────────────────
   Self-contained: no styles leak into or out of .filter-bar.
   Reuses :root design tokens from style.css.

   Layout: a flex column of two stacked rows.
   - .filter-row--primary     always visible
   - .filter-row--secondary   visible per-axis gating
   ───────────────────────────────────────────────────────── */

.filter-bar {
  --chip-bg:        transparent;
  --chip-text:      var(--text-dim);
  --chip-border:    var(--border-card);
  --chip-bg-active: var(--accent-dim);
  --chip-text-active: var(--text);
  --chip-border-active: var(--accent-border);

  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0 0 28px;
  padding: 0;
}

/* ── A row = label on the left, scrolling chip rail on the right ── */
.filter-row {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.filter-row-label {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  width: 80px;
}

.filter-row-label-text { display: block; }

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

/* ── Chip button ─────────────────────────────────────── */
.filter-bar .chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  padding: 6px 12px;
  background: var(--chip-bg);
  color: var(--chip-text);
  border: 1px solid var(--chip-border);
  border-radius: 100px;
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.filter-bar .chip:hover {
  color: var(--text);
  border-color: var(--accent-border);
  background: var(--accent-soft);
}
.filter-bar .chip.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--accent-border);
}
.filter-bar .chip.active .chip-count { color: var(--accent); }

.filter-bar .chip-count {
  font-size: 10.5px;
  color: var(--text-mute);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.filter-bar .chip .caret {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  opacity: 0.6;
  margin-left: 2px;
}

/* ── "+ N more" trigger (only on tag axis when overflow exists) ── */
.filter-bar .more-trigger {
  flex-shrink: 0;
  padding: 6px 12px;
  background: transparent;
  color: var(--text-mute);
  border: 1px dashed var(--border-card);
  border-radius: 100px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.filter-bar .more-trigger:hover {
  color: var(--text);
  border-color: var(--accent-border);
}
.filter-bar .more-trigger[aria-expanded="true"] {
  color: var(--accent);
  border-color: var(--accent-border);
  border-style: solid;
}

/* ── Dropdown trigger (used in place of a chip rail for some secondary axes) ── */
.filter-bar .more-trigger.dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px 7px 14px;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border-card);
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.005em;
  white-space: nowrap;
  max-width: 280px;
  min-width: 0;
}
.filter-bar .more-trigger.dropdown-trigger:hover {
  border-color: var(--accent-border);
  color: var(--text);
  background: var(--bg-card);
}
.filter-bar .more-trigger.dropdown-trigger[aria-expanded="true"] {
  border-color: var(--accent-border);
  border-style: solid;
  color: var(--text);
  background: var(--bg-card);
}
.filter-bar .more-trigger.dropdown-trigger .dropdown-trigger-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}
.filter-bar .more-trigger.dropdown-trigger .caret {
  width: 11px;
  height: 11px;
  flex-shrink: 0;
  color: var(--text-mute);
  transition: transform 0.15s, color 0.15s;
}
.filter-bar .more-trigger.dropdown-trigger[aria-expanded="true"] .caret {
  transform: rotate(180deg);
  color: var(--accent);
}

/* ── More popover ─────────────────────────────────────── */
.filter-bar .more-trigger-wrap {
  position: relative;
  display: inline-block;
}
.filter-bar .more-popover {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 30;
  min-width: 200px;
  max-width: 320px;
  max-height: 320px;
  overflow-y: auto;
  padding: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 8px;
  box-shadow: var(--shadow-card-hover);
  -webkit-overflow-scrolling: touch;
}
.filter-bar .more-popover[hidden] { display: none; }
.filter-bar .more-popover.dropdown-popover {
  left: 0;
  right: auto;
  min-width: 220px;
}
.filter-bar .more-popover-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.filter-bar .more-popover-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 7px 12px;
  background: transparent;
  color: var(--text-dim);
  border: none;
  border-radius: 4px;
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.12s, color 0.12s;
}
.filter-bar .more-popover-item:hover {
  background: var(--accent-soft);
  color: var(--text);
}
.filter-bar .more-popover-item.is-active {
  background: var(--accent-dim);
  color: var(--accent);
}
.filter-bar .more-popover-item.is-active .chip-count { color: var(--accent); }

/* ── Empty state (no items match) ─────────────────────── */
.filter-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-mute);
  font-size: 13px;
  background: var(--bg-card);
  border: 1px dashed var(--border-card);
  border-radius: 8px;
}

/* ── Mobile: single-column rows, horizontal-scroll chips ── */
@media (max-width: 599px) {
  .filter-bar {
    gap: 14px;
  }
  .filter-row {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .filter-row-label {
    width: auto;
    font-size: 9.5px;
  }
  .filter-chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: 4px;
    /* right-edge fade to signal scrollability */
    -webkit-mask-image: linear-gradient(to right, black calc(100% - 24px), transparent);
            mask-image: linear-gradient(to right, black calc(100% - 24px), transparent);
  }
  .filter-chips::-webkit-scrollbar { display: none; }

  .filter-bar .chip {
    padding: 5px 11px;
    font-size: 12px;
  }

  /* On mobile, "+ more" stays inline and the popover anchors differently */
  .filter-bar .more-popover {
    right: 0;
    left: auto;
    min-width: 220px;
  }
}

/* ── Tablet: smaller label width ─────────────────────── */
@media (min-width: 600px) and (max-width: 959px) {
  .filter-row-label {
    width: 64px;
    font-size: 9.5px;
  }
}