:root {
  --bg-app: #1b1b22;
  --bg-panel: #22222b;
  --bg-status: #14141a;
  --bg-button: #2c2c38;
  --bg-row: #2a2a35;
  --bg-row-active: #34344a;
  --accent: #3a86ff;
  --text-muted: #8b8b9a;
  --text-bright: #e8e8ee;
  --border: #34343f;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg-app);
  color: var(--text-muted);
  font-family: system-ui, sans-serif;
  font-size: 13px;
}

body {
  display: flex;
  flex-direction: column;
}

.appHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
}

.appTitle {
  color: var(--text-bright);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.headerButtons {
  display: flex;
  gap: 6px;
}

.iconButton {
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 4px;
  background: var(--bg-button);
  color: var(--text-bright);
  font: inherit;
  cursor: pointer;
}

.iconButton:hover {
  filter: brightness(1.25);
}

.iconButton.wide {
  width: auto;
  padding: 0 6px;
}

.iconButton.importLabel {
  display: flex;
  align-items: center;
  justify-content: center;
}

.editorArea {
  flex: 1;
  display: flex;
  min-height: 0;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100px;
  padding: 8px;
  background: var(--bg-panel);
  overflow-y: auto;
}

.toolButton {
  padding: 8px 4px;
  border: none;
  border-radius: 4px;
  background: var(--bg-button);
  color: var(--text-bright);
  font: inherit;
  cursor: pointer;
}

.toolButton:hover {
  filter: brightness(1.25);
}

.toolButton.isActive {
  background: var(--accent);
}

.checkRow {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 2px;
  color: var(--text-bright);
  cursor: pointer;
  user-select: none;
}

.historyRow {
  display: flex;
  gap: 6px;
}

.historyRow .toolButton {
  flex: 1;
  padding: 8px 2px;
}

.toolButton:disabled {
  opacity: 0.4;
  cursor: default;
  filter: none;
}

#colorPicker,
#ditherColorPicker {
  width: 100%;
  height: 32px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
}

.workspace {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

#editorCanvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.layerPanel {
  display: flex;
  flex-direction: column;
  width: 180px;
  padding: 8px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
}

.panelHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 2px 8px;
  color: var(--text-bright);
}

.panelButton {
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 4px;
  background: var(--bg-button);
  color: var(--text-bright);
  font: inherit;
  line-height: 1;
  cursor: pointer;
}

.panelButton:hover {
  filter: brightness(1.25);
}

.panelButton:disabled {
  opacity: 0.4;
  cursor: default;
  filter: none;
}

.layerList {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}

.layerRow {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border-radius: 4px;
  background: var(--bg-row);
  cursor: pointer;
}

.layerRow.isActive {
  background: var(--bg-row-active);
  outline: 1px solid var(--accent);
}

.layerVisibility {
  flex: none;
  cursor: pointer;
}

.layerName {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-bright);
  background: none;
  border: none;
  font: inherit;
}

.layerName:focus {
  outline: 1px solid var(--accent);
  border-radius: 2px;
}

.deleteLayerButton {
  flex: none;
  border: none;
  background: none;
  color: var(--text-muted);
  font: inherit;
  cursor: pointer;
  padding: 0 2px;
}

.deleteLayerButton:hover {
  color: #ff4d6d;
}

.opacityRow {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-top: 8px;
  margin-top: 8px;
  border-top: 1px solid var(--border);
}

.opacityRow label {
  flex: none;
}

#opacitySlider {
  flex: 1;
  min-width: 0;
}

#opacityValue {
  flex: none;
  width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.statusBar {
  display: flex;
  gap: 24px;
  padding: 6px 12px;
  background: var(--bg-status);
  font-variant-numeric: tabular-nums;
}

.frameStrip{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
}

.frameList{
  display: flex;
  gap: 6px;
  overflow-x: auto;
  flex: 1;
}

.frameButton{
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 4px;
  background: var(--bg-row);
  color: var(--text-bright);
  cursor: pointer;
  white-space: nowrap;
  flex: none;
}

.frameButton.isActive{
  background: var(--bg-row-active);
  outline: 1px solid var(--accent);
}

.deleteFrameButton{
  border: none;
  background: none;
  color: var(--text-muted);
  font: inherit;
  cursor: pointer;
  padding: 0 2px;
}

.deleteFrameButton:hover{
  color: #ff4d6d;
}

.previewBox{
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
  padding-right: 8px;
  border-right: 1px solid var(--border);
}

#previewCanvas{
  width: 48px;
  height: 48px;
  image-rendering: pixelated;
  background: #000;
  border-radius: 4px;
}

.fpsRow{
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  white-space: nowrap;
}

.fpsRow input{
  width: 80px;
}

.paletteBox {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.paletteSwatches {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.paletteSwatch {
  aspect-ratio: 1;
  border-radius: 3px;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0;
}

.paletteSwatch.isActive {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

#paletteImportInput {
  width: 100%;
  padding: 4px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-button);
  color: var(--text-bright);
  font: inherit;
}

.paletteExtractLabel {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 11px;
}