*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-darkest: #1a1a1a;
  --bg-dark: #252525;
  --bg-mid: #2e2e2e;
  --bg-panel: #323232;
  --bg-hover: #3a3a3a;
  --bg-active: #444;
  --border: #444;
  --border-light: #555;
  --text: #ccc;
  --text-bright: #eee;
  --text-dim: #888;
  --accent: #4a9eff;
  --accent-hover: #6ab3ff;
  --canvas-bg: #404040;
  --toolbar-w: 56px;
  --panel-w: 220px;
  --header-h: 36px;
  --tab-h: 28px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 12px;
  background: var(--bg-darkest);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  user-select: none;
}

/* ── MENU BAR ── */
#menubar {
  height: var(--header-h);
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 8px;
  gap: 2px;
  flex-shrink: 0;
  z-index: 100;
}
#menubar .app-name {
  font-weight: 700;
  font-size: 13px;
  color: var(--accent);
  margin-right: 12px;
  letter-spacing: 0.5px;
}
.menu-item {
  padding: 4px 10px;
  cursor: pointer;
  border-radius: 3px;
  color: var(--text);
  position: relative;
}
.menu-item:hover { background: var(--bg-hover); color: var(--text-bright); }
.menu-item.active { background: var(--bg-active); }

.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  min-width: 180px;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  padding: 4px 0;
}
.menu-item.active .dropdown { display: block; }
.dd-item {
  padding: 6px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
}
.dd-item:hover { background: var(--accent); color: white; }
.dd-item .shortcut { color: var(--text-dim); font-size: 11px; }
.dd-item:hover .shortcut { color: rgba(255,255,255,0.7); }
.dd-sep { height: 1px; background: var(--border); margin: 4px 0; }
.dd-hint { padding: 2px 16px 6px; font-size: 10px; color: var(--text-dim); font-style: italic; }

/* ── OPTIONS BAR ── */
#optionsbar {
  height: 32px;
  background: var(--bg-mid);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 8px;
  gap: 12px;
  flex-shrink: 0;
  font-size: 11px;
  color: var(--text);
}
#optionsbar label { color: var(--text-dim); }
.opt-group { display: inline-flex; align-items: center; gap: 6px; }
#optionsbar input[type=range] {
  width: 80px;
  accent-color: var(--accent);
}
#optionsbar input[type=number] {
  width: 56px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text-bright);
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 11px;
}
.opt-sep { width: 1px; height: 20px; background: var(--border); }
.opt-btn {
  padding: 3px 8px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  cursor: pointer;
  font-size: 11px;
}
.opt-btn:hover { background: var(--bg-hover); color: var(--text-bright); }

/* ── TABS BAR ── */
#tabsbar {
  height: var(--tab-h);
  background: var(--bg-darkest);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  padding: 0 8px;
  flex-shrink: 0;
}
.canvas-tab {
  padding: 4px 24px 4px 14px;
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  cursor: pointer;
  font-size: 11px;
  color: var(--text);
  margin-right: 2px;
  position: relative;
}
.canvas-tab.active { background: var(--canvas-bg); color: var(--text-bright); }
.tab-close {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  line-height: 1;
  opacity: 0.4;
  cursor: pointer;
}
.tab-close:hover { opacity: 1; }
#tab-add {
  padding: 4px 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-dim);
  align-self: flex-end;
  margin-bottom: 1px;
}
#tab-add:hover { color: var(--text-bright); }

/* ── MAIN LAYOUT ── */
#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── LEFT TOOLBAR ── */
#toolbar {
  width: var(--toolbar-w);
  background: var(--bg-dark);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 0;
  gap: 2px;
  flex-shrink: 0;
  overflow-y: auto;
}
.tool-btn {
  width: 48px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text);
  font-size: 16px;
  position: relative;
  transition: background 0.1s;
}
.tool-btn:hover { background: var(--bg-hover); color: var(--text-bright); }
.tool-btn.active { background: var(--accent); color: white; }
.tool-btn .tool-label {
  font-size: 8px;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  opacity: 0.7;
  pointer-events: none;
}
.tool-btn.active .tool-label { opacity: 0.9; }
.tool-sep { width: 40px; height: 1px; background: var(--border); margin: 3px 0; }

/* Color swatches */
#color-section {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
#color-swatches {
  position: relative;
  width: 32px;
  height: 32px;
}
#bg-color-swatch {
  width: 22px; height: 22px;
  position: absolute;
  bottom: 0; right: 0;
  border: 2px solid var(--bg-darkest);
  outline: 1px solid var(--border-light);
  cursor: pointer;
  border-radius: 2px;
}
#fg-color-swatch {
  width: 22px; height: 22px;
  position: absolute;
  top: 0; left: 0;
  border: 2px solid var(--bg-darkest);
  outline: 1px solid var(--border-light);
  cursor: pointer;
  border-radius: 2px;
  z-index: 1;
}
#swap-colors {
  font-size: 22px;
  cursor: pointer;
  color: var(--text-dim);
  line-height: 1;
  user-select: none;
}
#swap-colors:hover { color: var(--text-bright); }

/* ── CANVAS AREA ── */
#canvas-area {
  flex: 1;
  background: var(--canvas-bg);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
#canvas-wrapper {
  position: relative;
  box-shadow: 0 0 0 1px #555, 0 8px 40px rgba(0,0,0,0.6);
}
#main-canvas {
  display: block;
  image-rendering: pixelated;
}
#overlay-canvas {
  position: absolute;
  top: 0; left: 0;
  pointer-events: none;
}
#cursor-canvas {
  position: absolute;
  top: 0; left: 0;
}

/* zoom indicator */
#zoom-indicator {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.6);
  color: var(--text);
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 11px;
  pointer-events: none;
}

/* ruler */
#ruler-h, #ruler-v {
  position: absolute;
  background: var(--bg-dark);
  border-color: var(--border);
  display: none;
}

/* ── RIGHT PANELS ── */
#panels {
  width: var(--panel-w);
  background: var(--bg-dark);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}
.panel {
  border-bottom: 1px solid var(--border);
}
.panel-header {
  padding: 6px 10px;
  background: var(--bg-mid);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: 0.3px;
}
.panel-header:hover { background: var(--bg-hover); }
.panel-header .arrow { transition: transform 0.15s; font-size: 9px; }
.panel.collapsed .panel-header .arrow { transform: rotate(-90deg); }
.panel-body { padding: 8px; }
.panel.collapsed .panel-body { display: none; }

/* Layers panel */
#layers-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 40px;
  max-height: 200px;
  overflow-y: auto;
}
.layer-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid transparent;
}
.layer-row:hover { background: var(--bg-hover); }
.layer-row.active { background: var(--bg-active); border-color: var(--accent); }
.layer-vis {
  width: 16px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text-dim);
  flex-shrink: 0;
}
.layer-vis.visible { color: var(--text); }
.layer-thumb {
  width: 28px;
  height: 20px;
  border: 1px solid var(--border);
  border-radius: 2px;
  flex-shrink: 0;
  background: white;
  image-rendering: pixelated;
}
.layer-name {
  flex: 1;
  color: var(--text);
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.layer-actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}
.layer-btn {
  flex: 1;
  padding: 4px;
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  text-align: center;
}
.layer-btn:hover { background: var(--bg-hover); color: var(--text-bright); }

/* Blend mode / opacity */
.layer-props {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 6px;
}
.layer-props select {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 3px 4px;
  border-radius: 3px;
  font-size: 11px;
}
.layer-props input[type=number] {
  width: 44px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 3px 4px;
  border-radius: 3px;
  font-size: 11px;
}

/* Color panel */
#color-panel-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#color-picker-input {
  width: 100%;
  height: 36px;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  background: none;
  padding: 0;
}
.color-sliders { display: flex; flex-direction: column; gap: 4px; }
.color-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
}
.color-row label { width: 12px; color: var(--text-dim); }
.color-row input[type=range] {
  flex: 1;
  accent-color: var(--accent);
  height: 3px;
}
.color-row input[type=number] {
  width: 40px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 11px;
  text-align: right;
}
#hex-input-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
#hex-input-row label { color: var(--text-dim); font-size: 11px; }
#hex-input {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 3px 6px;
  border-radius: 3px;
  font-size: 11px;
  font-family: monospace;
}

/* History panel */
#history-list {
  max-height: 150px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.hist-item {
  padding: 4px 6px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  color: var(--text);
}
.hist-item:hover { background: var(--bg-hover); }
.hist-item.current { background: var(--bg-active); color: var(--text-bright); }
.hist-item.future { color: var(--text-dim); }

/* Info panel */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  font-size: 11px;
}
.info-label { color: var(--text-dim); }
.info-value { color: var(--text-bright); font-family: monospace; }

/* ── STATUS BAR ── */
#statusbar {
  height: 22px;
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 10px;
  gap: 20px;
  font-size: 10px;
  color: var(--text-dim);
  flex-shrink: 0;
}
#statusbar span { color: var(--text); }

#feature-request-btn {
  background: #666;
  color: #fff;
  border: none;
  border-radius: 3px;
  padding: 2px 8px;
  font-size: 10px;
  cursor: pointer;
  margin-left: 8px;
}
#feature-request-btn:hover { background: #777; }

#feature-panel {
  display: none;
  position: fixed;
  bottom: 22px;
  right: 0;
  width: 320px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-bottom: none;
  flex-direction: column;
  z-index: 1000;
}
#feature-panel.open { display: flex; }
#feature-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  font-size: 11px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
#feature-panel-header button {
  background: none;
  border: none;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
}
#feature-textarea {
  width: 100%;
  height: 150px;
  background: var(--bg);
  color: var(--text);
  border: none;
  padding: 10px;
  font-size: 12px;
  font-family: inherit;
  resize: none;
  outline: none;
}

/* ── MODAL ── */
#modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 500;
  align-items: center;
  justify-content: center;
}
#modal-overlay.open { display: flex; }
#modal {
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 20px;
  min-width: 320px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
}
#modal h2 { font-size: 14px; color: var(--text-bright); margin-bottom: 16px; }
.modal-field {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 12px;
}
.modal-field label { width: 80px; color: var(--text-dim); }
.modal-field input, .modal-field select {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text-bright);
  padding: 5px 8px;
  border-radius: 3px;
  font-size: 12px;
}
.modal-buttons { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }
.modal-btn {
  padding: 6px 18px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  border: 1px solid var(--border);
  background: var(--bg-mid);
  color: var(--text);
}
.modal-btn:hover { background: var(--bg-hover); }
.modal-btn.primary { background: var(--accent); border-color: var(--accent); color: white; }
.modal-btn.primary:hover { background: var(--accent-hover); }

/* Tooltip */
[data-tip] { position: relative; }
[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  margin-left: 8px;
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 3px 8px;
  border-radius: 3px;
  font-size: 11px;
  white-space: nowrap;
  z-index: 999;
  pointer-events: none;
}

/* Selection marquee */
#selection-overlay {
  position: absolute;
  border: 1px dashed white;
  pointer-events: none;
  display: none;
  animation: marchingAnts 0.5s linear infinite;
}
@keyframes marchingAnts {
  to { stroke-dashoffset: -10; }
}

scrollbar-width: thin;
scrollbar-color: var(--border) transparent;
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ── FILTERS PANEL ── */
.filter-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  font-size: 11px;
}
.filter-row label {
  width: 72px;
  color: var(--text-dim);
  flex-shrink: 0;
}
.filter-row input[type=range] {
  flex: 1;
  accent-color: var(--accent);
}
.filter-row .filter-val {
  width: 36px;
  text-align: right;
  color: var(--text-bright);
  font-family: monospace;
  font-size: 11px;
}
.filter-actions {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}
.filter-apply-btn {
  flex: 1;
  padding: 5px 8px;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: white;
  cursor: pointer;
  font-size: 11px;
  text-align: center;
}
.filter-apply-btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.filter-reset-btn {
  flex: 1;
  padding: 5px 8px;
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  cursor: pointer;
  font-size: 11px;
  text-align: center;
}
.filter-reset-btn:hover { background: var(--bg-hover); color: var(--text-bright); }