/* ═══════════════════════════════════════════════════
   BROWSE DOCK — shared two-column bottom dock chrome.
   /maker only (linked directly from maker/index.html).

   Built by js/components/browse-dock.js. The host element KEEPS its
   per-tab dock class (height var, border-top, outer placement come
   from the tab's existing dock CSS); this file styles the internals:
   header · search · collapsible category rail · content scroller ·
   resize handle. Visual spec = the Character tab's picker panel.

   Also carries a scope-NEUTRAL copy of the .npc-grid/.npc-btn cell
   family (the npc.css original is scoped to .tab-npc/.tab-monsters/
   .tab-skill/.tab-pet only — which is why Misc's cells rendered
   unstyled). Any grid rendered inside a .browse-dock gets uniform
   cells with zero markup changes. Gradients/radii tokenized.
   ═══════════════════════════════════════════════════ */

.maker .browse-dock {
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 0;
  background: var(--chrome-hi, #fff);
}

/* ── Resize handle (top edge) ── */
.maker .browse-dock .bd-resize-handle {
  position: absolute;
  top: -3px; left: 0; right: 0; height: 6px;
  cursor: ns-resize;
  z-index: 5;
}
.maker .browse-dock .bd-resize-handle:hover,
.maker .browse-dock .bd-resize-handle.dragging {
  background: var(--accent-glow);
}

/* ── Header ── */
/* Design-system 2026-08-06: dock headers standardize on the winning
   values (7×12 · 12px · chrome-lo · ≈32px) — this component is the LIVE
   shared implementation, so aligning it aligns every browse-dock tab. */
.maker .browse-dock .bd-header {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  font-size: var(--fs-4);
  font-weight: 600;
  color: var(--text-mid);
  border-bottom: 1px solid var(--border);
  background: var(--chrome-lo);
  cursor: pointer;
  user-select: none;
  min-height: 32px;
  box-sizing: border-box;
}
.maker .browse-dock .bd-title {
  flex: 0 0 auto;
  font-size: var(--fs-4, 12px);
  font-weight: 700;
  color: var(--text);
}
.maker .browse-dock .bd-search-wrap {
  flex: 1 1 auto;
  min-width: 60px;
  max-width: 420px;
  cursor: default;
}
.maker .browse-dock .bd-search {
  width: 100%;
  box-sizing: border-box;
  font: inherit;
  font-size: var(--fs-4, 12px);   /* design-system 2026-08-06: standard search */
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--input-border);
  border-radius: var(--r);
  background: var(--input-bg);
  color: var(--text);
}
.maker .browse-dock .bd-search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.maker .browse-dock .bd-extras {
  flex: 0 1 auto;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-width: 0;
  cursor: default;
}
.maker .browse-dock .bd-extras:empty { display: none; }
.maker .browse-dock .bd-chevron {
  flex: 0 0 auto;
  margin-left: auto;
  color: var(--text-dim);
  font-size: var(--fs-3);
  transition: transform 0.18s ease;
}
.maker .browse-dock.is-collapsed .bd-chevron { transform: rotate(-90deg); }

/* Whole-dock collapse — header strip only. */
.maker .browse-dock.is-collapsed .bd-main { display: none; }

/* ── Main: rail + content ── */
.maker .bd-main {
  flex: 1 1 auto;
  display: flex;
  min-height: 0;
}

/* Category rail — Scenes bs-tree metrics in the app skin. */
.maker .bd-rail {
  flex: 0 0 148px;
  min-height: 0;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  background: var(--tab-active);
  padding: var(--sp-1);
  display: flex;
  flex-direction: column;
  gap: 1px;
  scrollbar-width: thin;
}
.maker .bd-rail-collapsed .bd-rail { display: none; }

.maker .bd-rail-row {
  appearance: none;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  width: 100%;
  box-sizing: border-box;
  border: none;
  background: transparent;
  border-radius: var(--r);
  padding: var(--sp-2) var(--sp-3);
  font: inherit;
  font-size: var(--fs-3, 11px);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.maker .bd-rail-row:hover { background: rgba(0, 0, 0, 0.05); }
.maker .bd-rail-row.is-active {
  background: rgba(74, 158, 192, 0.18);
  color: var(--accent-text);
  font-weight: 600;
}
/* Depth indent — each nesting level (World → Town → Street) steps in 16px.
   Depth 1 keeps the original is-sub inset; deeper levels add per-depth rules. */
.maker .bd-rail-row.is-sub { padding-left: 22px; }
.maker .bd-rail-row[data-depth="2"] { padding-left: 38px; }
.maker .bd-rail-row[data-depth="3"] { padding-left: 54px; }

/* Collapsible sub-section groups — kids slide open (accordion) via a CSS
   grid-rows 0fr↔1fr transition. Grid animates the child's auto-height natively,
   so ARBITRARY nesting works with no JS scrollHeight math: a parent row grows to
   fit an expanded child for free. The inner wrapper carries min-height:0 +
   overflow:hidden so the row can collapse fully to 0. */
.maker .bd-rail-group { display: flex; flex-direction: column; }
.maker .bd-rail-kids {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.18s ease;
}
.maker .bd-rail-group.is-expanded > .bd-rail-kids { grid-template-rows: 1fr; }
.maker .bd-rail-kids-inner {
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
@media (prefers-reduced-motion: reduce) {
  .maker .bd-rail-kids { transition: none; }
}
.maker .bd-rail-chev {
  flex: 0 0 auto;
  width: 10px;
  font-size: var(--fs-1);
  color: var(--text-dim);
  transition: transform 0.15s ease;
}
.maker .bd-rail-chev.bd-chev-open { transform: rotate(90deg); }
.maker .bd-rail-row:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.maker .bd-rail-icon {
  flex: 0 0 auto;
  display: inline-flex;
  color: var(--text-dim);
}
.maker .bd-rail-row.is-active .bd-rail-icon { color: inherit; }
.maker .bd-rail-label {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.maker .bd-rail-count {
  flex: 0 0 auto;
  min-width: 16px;
  text-align: center;
  padding: 0 var(--sp-1);
  font-size: var(--fs-1);
  font-weight: 600;
  border-radius: var(--r);
  background: var(--border);
  color: var(--text-dim);
}
.maker .bd-rail-row.is-active .bd-rail-count {
  background: var(--accent);
  color: var(--text-inv);
}

/* Slim expander tab shown while the rail is collapsed. */
.maker .bd-rail-toggle {
  flex: 0 0 14px;
  appearance: none;
  border: none;
  border-right: 1px solid var(--border);
  background: var(--chrome);
  color: var(--text-dim);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.maker .bd-rail-toggle:hover { background: var(--accent-glow); color: var(--accent-text); }
.maker .bd-rail-toggle .bd-flip { transform: rotate(180deg); }

/* Content scroller — the tab renders its grid(s) in here. */
.maker .browse-dock .bd-content {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
}

/* ═══ Scope-neutral thumbnail cells (npc.css family, tokenized) ═══ */
.maker .browse-dock .npc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--thumb-sm, 56px), 1fr));
  gap: var(--sp-1);
  padding: var(--sp-2);
  box-sizing: border-box;
  width: 100%;
}
.maker .browse-dock .npc-btn {
  background: var(--cell-grad, linear-gradient(180deg, #f6f6f6 0%, #e8e8e8 100%));
  border: none;
  outline: none;
  border-radius: var(--r);
  padding: var(--sp-1) 2px 3px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 2px;
  width: 100%;
  height: 72px;
  position: relative;
  overflow: hidden;
  transform: translateY(0);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), background 0.15s ease;
  will-change: transform;
}
.maker .browse-dock .npc-btn:hover {
  background: var(--cell-grad-hover, linear-gradient(180deg, #f0f0f0 0%, #e2e2e2 100%));
  transform: translateY(-3px);
}
.maker .browse-dock .npc-btn.active {
  background: linear-gradient(180deg, rgba(74,158,192,0.2) 0%, rgba(42,126,160,0.12) 100%);
}
.maker .browse-dock .npc-btn.active:hover { transform: translateY(0); }
.maker .browse-dock .npc-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.maker .browse-dock .npc-btn-icon {
  width: 48px;
  height: 48px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  pointer-events: none;
}
.maker .browse-dock .npc-btn-icon img,
.maker .browse-dock .npc-btn-icon canvas {
  width: auto;
  height: auto;
  max-width: none;
  max-height: none;
  flex-shrink: 0;
  image-rendering: pixelated;
  display: block;
}
.maker .browse-dock .npc-btn-label {
  font-size: var(--fs-1);
  color: var(--text-dim);
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: calc(100% - 4px);
  line-height: 1.3;
  pointer-events: none;
}
.maker .browse-dock .npc-btn.active .npc-btn-label { color: var(--accent-text); }
.maker .browse-dock .npc-btn-shimmer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.15s ease;
}
.maker .browse-dock .npc-btn:hover .npc-btn-shimmer { opacity: 1; }

/* Group labels inside the content area (AFTERIMAGE (11), regions…). */
.maker .browse-dock .bd-group-label {
  font-size: var(--fs-2);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: var(--sp-3) var(--sp-3) 2px;
  position: sticky;
  top: 0;
  background: var(--chrome-hi, #fff);
  z-index: 1;
}