:root {
  color-scheme: light dark;
  --bg: #f1f3f6;
  --panel-bg: rgba(255, 255, 255, 0.85);
  --border: #c8d0e0;
  --accent: #3f51b5;
  --accent-dark: #2f3a8c;
  --text: #1f2333;
  --muted: #6b7288;
  --gizmo-origin: #f6c343;
  --gizmo-x: #ef5350;
  --gizmo-y: #66bb6a;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
}

#app {
  display: grid;
  grid-template-columns: 320px 1fr 300px;
  grid-template-rows: 100vh;
  width: 100%;
}

aside {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border-right: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#asset-browser header,
#layer-controls header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

#layer-controls header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

#layer-controls header h2 {
  margin: 0;
}

#clear-layers {
  padding: 6px 12px;
  border-radius: 6px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(31, 35, 51, 0.2);
}

#clear-layers:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

#asset-browser h1 {
  margin: 0 0 12px;
  font-size: 1.3rem;
}

#asset-search {
  width: 100%;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.category-filters {
  display: grid;
  gap: 8px;
}

.category-filters select {
  width: 100%;
  padding: 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 0.9rem;
}

#asset-list {
  flex: 1 1 auto;
  overflow: auto;
  padding: 12px 16px 24px;
}

.asset-category {
  margin-bottom: 16px;
}

.asset-category summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent-dark);
}

.asset-button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  margin: 6px 0;
  border-radius: 6px;
  border: 1px solid transparent;
  background: rgba(63, 81, 181, 0.08);
  color: inherit;
  width: 100%;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s ease, border 0.2s ease;
}

.asset-button:hover,
.asset-button:focus {
  border-color: var(--accent);
  background: rgba(63, 81, 181, 0.16);
}

.asset-button small {
  color: var(--muted);
}

#workspace {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#avatar-toolbar {
  display: flex;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
}

#avatar-toolbar button {
  padding: 8px 12px;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 600;
  box-shadow: 0 2px 4px rgba(31, 35, 51, 0.2);
  margin-right: 10px;
}

#avatar-toolbar button:last-child {
  margin-right: 0;
}

#avatar-toolbar button:hover {
  background: var(--accent-dark);
}

#stage-wrapper {
  flex: 1 1 auto;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.9), rgba(200, 208, 224, 0.5));
}

#stage-controls {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 18px rgba(31, 35, 51, 0.18);
  z-index: 6;
}

.zoom-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.zoom-controls button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(31, 35, 51, 0.25);
  transition: background 0.2s ease;
}

.zoom-controls button:hover {
  background: var(--accent-dark);
}

#zoom-reset {
  width: auto;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.8rem;
}

#base-coordinates {
  display: flex;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

#base-coordinates strong {
  color: var(--text);
  font-weight: 700;
}

#stage-hint {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(31, 35, 51, 0.85);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  z-index: 6;
  cursor: grab;
  user-select: none;
}

#stage-hint:active {
  cursor: grabbing;
}

#avatar-stage {
  position: relative;
  cursor: grab;
  user-select: none;
}

#avatar-stage:active {
  cursor: grabbing;
}

#stage-content {
  position: relative;
  transform-origin: 50% 50%;
}

#stage-content > canvas,
#base-parts-container,
#base-parts-container .base-layer-item,
#layer-behind-container,
#layer-behind-container .layer-item,
#layer-container,
#layer-container .layer-item {
  transform-origin: 50% 50%;
}

#pivot-handle {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%, -50%);
  z-index: 30;
  pointer-events: none;
}

#pivot-handle .gizmo-origin {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--gizmo-origin);
  background: #fff;
  box-shadow: 0 2px 6px rgba(31, 35, 51, 0.3);
  transform: translate(-50%, -50%);
  cursor: grab;
  pointer-events: auto;
}

#pivot-handle.dragging .gizmo-origin {
  cursor: grabbing;
}

#pivot-handle .gizmo-axis {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
}

#pivot-handle .gizmo-axis::before {
  content: "";
  position: absolute;
  opacity: 0.35;
}

#pivot-handle .gizmo-line {
  border-radius: 1px;
  opacity: 0.9;
}

#pivot-handle .gizmo-axis .gizmo-handle {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(31, 35, 51, 0.25);
  pointer-events: auto;
}

#pivot-handle .gizmo-axis-x .gizmo-line {
  width: 64px;
  height: 2px;
  background: var(--gizmo-x);
  transform: translate(0, -50%);
}

#pivot-handle .gizmo-axis-x::before {
  width: 36px;
  height: 2px;
  background: var(--gizmo-x);
  left: -36px;
  top: 0;
  transform: translate(0, -50%);
}

#pivot-handle .gizmo-axis-x .gizmo-handle {
  background: var(--gizmo-x);
  left: 64px;
  top: 0;
  transform: translate(-50%, -50%);
  cursor: ew-resize;
}

#pivot-handle .gizmo-axis-y .gizmo-line {
  width: 2px;
  height: 64px;
  background: var(--gizmo-y);
  transform: translate(-50%, 0);
}

#pivot-handle .gizmo-axis-y::before {
  width: 2px;
  height: 36px;
  background: var(--gizmo-y);
  left: 0;
  top: -36px;
  transform: translate(-50%, 0);
}

#pivot-handle .gizmo-axis-y .gizmo-handle {
  background: var(--gizmo-y);
  left: 0;
  top: 64px;
  transform: translate(-50%, -50%);
  cursor: ns-resize;
}

#pivot-handle.dragging-xy .gizmo-origin {
  box-shadow: 0 0 0 2px rgba(246, 195, 67, 0.25), 0 3px 10px rgba(31, 35, 51, 0.35);
}

#pivot-handle.dragging-x .gizmo-axis-x .gizmo-line,
#pivot-handle.dragging-x .gizmo-axis-x::before {
  opacity: 1;
}

#pivot-handle.dragging-x .gizmo-axis-x .gizmo-handle {
  box-shadow: 0 0 0 2px rgba(239, 83, 80, 0.25), 0 3px 10px rgba(31, 35, 51, 0.35);
}

#pivot-handle.dragging-y .gizmo-axis-y .gizmo-line,
#pivot-handle.dragging-y .gizmo-axis-y::before {
  opacity: 1;
}

#pivot-handle.dragging-y .gizmo-axis-y .gizmo-handle {
  box-shadow: 0 0 0 2px rgba(102, 187, 106, 0.25), 0 3px 10px rgba(31, 35, 51, 0.35);
}

#base-avatar,
#base-parts-container .base-layer-item,
#layer-behind-container .layer-item,
#layer-container .layer-item {
  transform: translate(-50%, -50%);
}

#base-parts-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

#layer-behind-container {
  position: absolute;
  inset: 0;
  z-index: 0;
}

#base-parts-container .base-layer-item {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
}

#stage-content > canvas,
#layer-behind-container .layer-item,
#layer-container .layer-item {
  position: absolute;
  left: 0;
  top: 0;
}

#base-avatar {
  left: 0;
  top: 0;
  pointer-events: none;
  display: block;
}

.layer-item {
  pointer-events: auto;
  cursor: move;
}

.layer-item.selected {
  outline: 2px solid var(--accent);
}

#layer-controls {
  border-left: 1px solid var(--border);
}

#layers-panel {
  flex: 1 1 auto;
  overflow: auto;
  padding: 16px;
}

.layer-entry {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid transparent;
  margin-bottom: 8px;
  background: rgba(63, 81, 181, 0.08);
  cursor: pointer;
}

.layer-entry.active {
  border-color: var(--accent);
  background: rgba(63, 81, 181, 0.16);
}

.layer-entry.is-hidden {
  opacity: 0.55;
  background: rgba(31, 35, 51, 0.08);
}

.layer-entry.dragging {
  opacity: 0.6;
}

.layer-entry.drop-before {
  box-shadow: 0 -2px 0 0 var(--accent) inset;
}

.layer-entry.drop-after {
  box-shadow: 0 2px 0 0 var(--accent) inset;
}

.layer-entry-controls {
  display: flex;
  gap: 6px;
}

.layer-entry button {
  padding: 4px 6px;
  font-size: 0.75rem;
  border-radius: 4px;
  border: none;
  background: rgba(31, 35, 51, 0.15);
  color: inherit;
  cursor: pointer;
}

.layer-entry button.is-off {
  background: rgba(31, 35, 51, 0.05);
  opacity: 0.7;
}

.layer-entry button:hover {
  background: rgba(31, 35, 51, 0.3);
}

#selection-details {
  padding: 16px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
}

#selection-details h3 {
  margin: 0 0 12px;
}

#shop-editor {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 16px;
  display: grid;
  gap: 12px;
}

#shop-editor legend {
  padding: 0 6px;
  font-weight: 600;
  color: var(--accent-dark);
}

.shop-editor-rows {
  display: grid;
  gap: 12px;
}

.shop-editor-row {
  display: grid;
  gap: 8px;
}

.shop-editor-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.shop-editor-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.shop-editor-inputs input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
}

.shop-editor-inputs input:disabled {
  opacity: 0.6;
  background: rgba(31, 35, 51, 0.05);
  cursor: not-allowed;
}

.coordinate-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

.coordinate-inputs input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
}

.selection-actions button {
  width: 100%;
  padding: 8px;
  border-radius: 6px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 8px;
}

#toggle-gizmo-drag {
  background: rgba(31, 35, 51, 0.1);
  color: inherit;
  border: 1px solid var(--border);
}

#toggle-gizmo-drag.is-active {
  background: var(--gizmo-origin);
  border-color: transparent;
  color: #1f2333;
}

#toggle-gizmo-drag:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.selection-actions button:last-child {
  margin-bottom: 0;
  background: rgba(205, 48, 70, 0.9);
}

.selection-actions button:last-child:hover {
  background: rgba(205, 48, 70, 1);
}

.empty-state {
  color: var(--muted);
  font-style: italic;
  text-align: center;
  margin-top: 24px;
}

@media (max-width: 1280px) {
  #app {
    grid-template-columns: 260px 1fr 280px;
  }
}

@media (max-width: 1024px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }
  #asset-browser,
  #layer-controls {
    position: relative;
    height: 40vh;
  }
  #workspace {
    order: -1;
    height: 60vh;
  }
}