/* PhotoEdit — Professional dark UI */
:root {
  --bg-app: #1a1a1e;
  --bg-panel: #25252b;
  --bg-panel-2: #2c2c34;
  --bg-hover: #35353f;
  --bg-active: #3d3d4a;
  --bg-input: #1e1e24;
  --border: #3a3a45;
  --border-light: #4a4a58;
  --text: #e8e8ed;
  --text-dim: #9a9aa8;
  --text-muted: #6a6a78;
  --accent: #4c8bf5;
  --accent-hover: #5d9aff;
  --accent-dim: rgba(76, 139, 245, 0.2);
  --danger: #e85d5d;
  --success: #4caf78;
  --warning: #e8b84c;
  --checker-1: #2a2a30;
  --checker-2: #222228;
  --menubar-h: 36px;
  --toolbar-w: 48px;
  --options-h: 36px;
  --status-h: 24px;
  --panel-w: 260px;
  --radius: 6px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "Cascadia Code", "Fira Code", "Consolas", monospace;
  --shadow: 0 8px 32px rgba(0,0,0,0.45);
}

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

/* Screen reader only - visually hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font);
  font-size: 13px;
  color: var(--text);
  background: var(--bg-app);
  user-select: none;
  -webkit-user-select: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

input, select, textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border: none;
  border-radius: 2px;
  padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--text);
}

input[type="number"] { width: 52px; padding: 2px 4px; text-align: center; }
input[type="text"] { padding: 4px 8px; }

kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0 4px;
  margin-left: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 4px 0;
}

#app {
  display: grid;
  grid-template-rows: var(--menubar-h) auto minmax(0, 1fr);
  grid-template-columns: var(--toolbar-w) minmax(0, 1fr);
  height: 100vh;
  width: 100vw;
  max-width: 100vw;
  max-height: 100vh;
  overflow: hidden;
}

/* ===== Menubar ===== */
#menubar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

h1.brand,
.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px 0 4px;
  margin: 0;
  font-size: inherit;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand-icon { color: var(--accent); font-size: 14px; }
.brand-name { font-size: 13px; }

.header-logo-link {
  display: flex;
  align-items: center;
  padding: 0 8px;
  height: 100%;
}

.header-logo {
  height: calc(var(--menubar-h) - 8px);
  width: auto;
  border-radius: 4px;
}

.menus { display: flex; align-items: stretch; height: 100%; }

.menu { position: relative; height: 100%; display: flex; align-items: center; }

.menu-btn {
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--text-dim);
  height: 26px;
}

.menu-btn:hover, .menu.open .menu-btn {
  background: var(--bg-hover);
  color: var(--text);
}

.menu-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 4px;
  z-index: 200;
}

.menu.open .menu-dropdown { display: block; }

.menu-dropdown button {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 6px 10px;
  border-radius: 4px;
  text-align: left;
  gap: 12px;
  white-space: nowrap;
}

.menu-dropdown button:hover {
  background: var(--accent);
  color: #fff;
}

.menu-dropdown button:hover kbd { color: rgba(255,255,255,0.7); border-color: rgba(255,255,255,0.3); }

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-dim);
  font-size: 12px;
}

.lang-picker {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.lang-picker .lang-icon {
  font-size: 13px;
  opacity: 0.85;
}

.lang-picker select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 11px;
  padding: 2px 22px 2px 8px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%239a9aa8' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
  min-width: 100px;
}

.lang-picker select:hover {
  border-color: var(--border-light);
}

.lang-picker select:focus {
  border-color: var(--accent);
}

.doc-title { font-weight: 500; color: var(--text); }
.zoom-label {
  background: var(--bg-input);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  min-width: 48px;
  text-align: center;
}

/* ===== Toolbar ===== */
#toolbar {
  grid-row: 2 / 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 4px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-x: hidden;
  overflow-y: auto;
  min-height: 0;
  max-height: 100%;
  z-index: 50;
}

.tool-group { display: flex; flex-direction: column; gap: 1px; width: 100%; align-items: center; }

.tool {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  transition: background 0.1s, color 0.1s;
}

.tool svg { width: 20px; height: 20px; }

.tool:hover { background: var(--bg-hover); color: var(--text); }
.tool.active { background: var(--accent-dim); color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }

.tool-sep {
  width: 28px;
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.color-swatches {
  margin-top: 8px;
  position: relative;
  width: 40px;
  height: 48px;
}

.swatch-stack { position: relative; width: 100%; height: 100%; }

.swatch {
  width: 22px;
  height: 22px;
  border: 2px solid var(--text);
  border-radius: 3px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
  position: absolute;
}

.swatch.fg { top: 0; left: 0; z-index: 2; }
.swatch.bg { top: 12px; left: 12px; z-index: 1; }

.swap-btn, .reset-btn {
  position: absolute;
  font-size: 10px;
  color: var(--text-muted);
  padding: 0;
  line-height: 1;
}

.swap-btn { top: -2px; right: -2px; }
.reset-btn { bottom: 0; left: 0; font-size: 9px; }

/* ===== Options bar ===== */
#options-bar {
  grid-column: 2;
  height: var(--options-h);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 12px;
  overflow-x: auto;
}

#tool-options {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: nowrap;
  color: var(--text-dim);
  font-size: 12px;
}

#tool-options label {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

#tool-options input[type="range"] { width: 100px; }
#tool-options select { padding: 2px 6px; min-width: 80px; }

.opt-val {
  min-width: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text);
}

/* ===== Workspace ===== */
#workspace {
  grid-column: 2;
  display: grid;
  /* minmax(0,1fr) is required so wide sidebar content (e.g. ads) cannot
     expand min-content and collapse the canvas column to zero width. */
  grid-template-columns: 180px minmax(0, 1fr) var(--panel-w);
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.panel-col {
  background: var(--bg-panel);
  border-color: var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  min-height: 0;
}

#left-panel { border-right: 1px solid var(--border); }
#right-panel {
  border-left: 1px solid var(--border);
  width: var(--panel-w);
  max-width: var(--panel-w);
  min-width: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

/* Right panel panels show full content, sidebar scrolls */
#right-panel .panel {
  flex-shrink: 0;
}

#right-panel .panel-body {
  overflow-y: visible;
  flex: none;
}

.panel {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--border);
  min-height: 0;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  background: var(--bg-panel-2);
  flex-shrink: 0;
}

.panel-actions { display: flex; gap: 2px; }
.panel-actions button {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  font-size: 16px;
  line-height: 1;
  color: var(--text-dim);
}
.panel-actions button:hover { background: var(--bg-hover); color: var(--text); }

.panel-body {
  padding: 8px;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

/* History */
#history-list { display: flex; flex-direction: column; gap: 1px; }

.history-item {
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
}

.history-item:hover { background: var(--bg-hover); }
.history-item.active { background: var(--accent-dim); color: var(--accent); }
.history-item.future { opacity: 0.4; }

/* Canvas area */
#canvas-area {
  display: grid;
  grid-template-columns: 20px 1fr;
  grid-template-rows: 20px 1fr var(--status-h);
  background: #121216;
  min-width: 0;
  min-height: 0;
  position: relative;
}

#ruler-corner {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.ruler {
  background: var(--bg-panel);
  position: relative;
  overflow: hidden;
}

.ruler.horizontal { border-bottom: 1px solid var(--border); }
.ruler.vertical { border-right: 1px solid var(--border); }

.ruler canvas { display: block; }

#viewport {
  grid-column: 2;
  grid-row: 2;
  overflow: hidden;
  position: relative;
  cursor: default;
  background:
    linear-gradient(45deg, var(--checker-1) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-1) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-1) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-1) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-color: var(--checker-2);
}

#canvas-wrap {
  position: absolute;
  transform-origin: 0 0;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 12px 40px rgba(0,0,0,0.5);
}

#canvas-wrap canvas {
  position: absolute;
  top: 0;
  left: 0;
  image-rendering: auto;
}

#checkerboard { z-index: 0; }
#main-canvas { z-index: 1; }
#overlay-canvas { z-index: 2; pointer-events: none; }

#status-bar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 10px;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

#status-msg { margin-left: auto; color: var(--text-dim); }

/* Color panel */
.color-panel { display: flex; flex-direction: column; gap: 8px; }

.hue-sat-box {
  position: relative;
  width: 100%;
  aspect-ratio: 200/140;
  border-radius: 4px;
  overflow: hidden;
  cursor: crosshair;
  border: 1px solid var(--border);
}

#hs-canvas { width: 100%; height: 100%; display: block; }

.hs-cursor {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 1px #000, inset 0 0 0 1px #000;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hue-slider-wrap { padding: 0 2px; }
#hue-slider {
  width: 100%;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(to right,
    #f00 0%, #ff0 17%, #0f0 33%, #0ff 50%, #00f 67%, #f0f 83%, #f00 100%);
}

#hue-slider::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  border: 2px solid #fff;
  background: transparent;
}

.rgb-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.rgb-inputs label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-dim);
}

.rgb-inputs input { flex: 1; width: auto; min-width: 0; }

.hex-row label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-dim);
}

.hex-row input {
  flex: 1;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

/* Adjustments */
.adj-panel { display: flex; flex-direction: column; gap: 6px; }

.adj-row {
  display: grid;
  grid-template-columns: 80px 1fr 32px;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
}

.adj-row input[type="range"] { width: 100%; }
.adj-val {
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: right;
  color: var(--text);
}

.adj-actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

/* Layers */
.layers-panel { flex: 1; min-height: 160px; }

#layers-list {
  display: flex;
  flex-direction: column-reverse;
  gap: 2px;
  max-height: 220px;
}

.layer-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
}

.layer-item:hover { background: var(--bg-hover); }
.layer-item.active {
  background: var(--accent-dim);
  border-color: var(--accent);
}

.layer-vis {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  color: var(--text-dim);
  font-size: 12px;
  flex-shrink: 0;
}

.layer-vis:hover { background: var(--bg-active); color: var(--text); }
.layer-vis.hidden { opacity: 0.3; }

.layer-thumb {
  width: 32px;
  height: 32px;
  border-radius: 3px;
  border: 1px solid var(--border);
  background:
    linear-gradient(45deg, #333 25%, transparent 25%),
    linear-gradient(-45deg, #333 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #333 75%),
    linear-gradient(-45deg, transparent 75%, #333 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0;
  background-color: #222;
  flex-shrink: 0;
  overflow: hidden;
}

.layer-thumb canvas { width: 100%; height: 100%; display: block; image-rendering: pixelated; }

.layer-name {
  flex: 1;
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  background: transparent;
  border: 1px solid transparent;
  padding: 2px 4px;
  border-radius: 3px;
  color: var(--text);
  min-width: 0;
}

.layer-name:focus {
  border-color: var(--accent);
  background: var(--bg-input);
}

.layer-props {
  padding: 8px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
}

.layer-props label {
  display: flex;
  align-items: center;
  gap: 6px;
}

.layer-props input[type="range"] { flex: 1; }
.layer-props select { flex: 1; padding: 2px 4px; }

/* Buttons */
.btn {
  padding: 6px 12px;
  border-radius: 4px;
  background: var(--bg-hover);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 12px;
  transition: background 0.1s;
}

.btn:hover { background: var(--bg-active); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.sm { padding: 4px 8px; font-size: 11px; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }

/* Modal */
#modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(2px);
}

#modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  min-width: 360px;
  max-width: 520px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal.wide { max-width: 640px; min-width: 480px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 { font-size: 15px; font-weight: 600; }

.modal-close {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  font-size: 20px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover { background: var(--bg-hover); color: var(--text); }

.modal-body {
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.form-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-row label {
  min-width: 100px;
  color: var(--text-dim);
  font-size: 12px;
}

.form-row input[type="number"],
.form-row input[type="text"],
.form-row select {
  flex: 1;
  padding: 6px 8px;
}

.form-hint {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
}

.shortcuts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.shortcuts-table th {
  text-align: left;
  padding: 6px 8px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}

.shortcuts-table td {
  padding: 5px 8px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.shortcuts-table kbd {
  margin-left: 0;
}

/* Text input overlay */
#text-input {
  position: fixed;
  z-index: 500;
  min-width: 80px;
  min-height: 1.2em;
  padding: 2px 4px;
  background: rgba(0,0,0,0.5);
  border: 1px dashed var(--accent);
  color: #fff;
  font-size: 24px;
  resize: both;
  outline: none;
  line-height: 1.2;
}

#text-input.hidden { display: none; }

/* Utility */
.hidden { display: none !important; }

/* Scrollbars */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Selection marching ants animation handled on overlay canvas */

/* ===== Sidebar AdSense (above histogram) ===== */
/* Fixed-size slot only. Do not use data-ad-format=auto or
   data-full-width-responsive here — those expand ancestors and break
   the editor grid (toolbar/sidebar scroll, zero-height canvas). */
.ad-panel {
  flex: 0 0 auto;
  flex-shrink: 0;
  overflow: hidden;
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
}

.ad-slot {
  width: 250px;
  height: 250px;
  max-width: 100%;
  margin: 5px auto;
  overflow: hidden;
  position: relative;
  /* Isolate size/layout from editor grid; still allow the ad iframe to paint */
  contain: layout size;
  box-sizing: border-box;
}

.ad-slot .adsbygoogle {
  display: inline-block;
  width: 250px;
  height: 250px;
  max-width: 100%;
  max-height: 100%;
  vertical-align: top;
}

/* ===== Histogram Panel ===== */
.histogram-panel .panel-body {
  padding: 6px;
}

#histogram-canvas {
  width: 100%;
  height: 80px;
  background: #111;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.histogram-channels {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 6px;
  font-size: 11px;
}

.histogram-channels label {
  display: flex;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  color: var(--text-dim);
}

.histogram-channels input[type="checkbox"] {
  width: 12px;
  height: 12px;
}

/* ===== Curves & Levels ===== */
.adj-section {
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 6px;
  overflow: hidden;
}

.adj-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  background: var(--bg-panel-2);
  cursor: pointer;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
}

.adj-section-header:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.toggle-icon {
  font-size: 8px;
  transition: transform 0.2s;
}

.adj-section.collapsed .toggle-icon {
  transform: rotate(-90deg);
}

.adj-section.collapsed .adj-section-body {
  display: none;
}

.adj-section-body {
  padding: 8px;
  background: rgba(0,0,0,0.15);
}

.curves-channel-select {
  margin-bottom: 8px;
}

.curves-channel-select select {
  width: 100%;
  padding: 4px 8px;
}

.curves-canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: #111;
  border-radius: 4px;
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 8px;
}

#curves-canvas {
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

#levels-histogram {
  width: 100%;
  height: 50px;
  background: #111;
  border-radius: 4px;
  border: 1px solid var(--border);
  margin-bottom: 8px;
}

.levels-inputs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 8px;
}

.levels-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
}

.levels-row label {
  min-width: 45px;
}

.levels-num {
  width: 45px !important;
  padding: 2px 4px !important;
  font-size: 11px;
}

.levels-gamma {
  flex: 1;
  width: 100%;
}

.levels-spacer {
  flex: 1;
}

/* ===== Layer Mask ===== */
.layer-mask-props {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.layer-mask-props label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.mask-actions {
  display: flex;
  gap: 4px;
}

.layer-item .layer-mask-thumb {
  width: 24px;
  height: 24px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: #222;
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
}

.layer-item .layer-mask-thumb canvas {
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
}

.layer-item .layer-mask-thumb.disabled {
  opacity: 0.4;
}

.layer-item .mask-link {
  font-size: 10px;
  color: var(--text-muted);
  margin: 0 2px;
}

/* ===== Before/After Toggle ===== */
#btn-before-after {
  font-size: 14px;
}

#btn-before-after.active {
  color: var(--accent);
  background: var(--accent-dim);
}

.before-after-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 10;
}

.before-after-split {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--accent);
  pointer-events: auto;
  cursor: ew-resize;
}

.before-after-split::before {
  content: '◀ ▶';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent);
  color: white;
  font-size: 10px;
  padding: 4px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.before-after-label {
  position: absolute;
  top: 8px;
  padding: 2px 8px;
  background: rgba(0,0,0,0.7);
  color: white;
  font-size: 11px;
  border-radius: 4px;
}

.before-after-label.before {
  left: 8px;
}

.before-after-label.after {
  right: 8px;
}

/* ===== Menu Label ===== */
.menu-dropdown .menu-label {
  display: block;
  padding: 4px 12px;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== Batch Export Progress ===== */
.progress-bar {
  height: 8px;
  background: var(--bg-panel);
  border-radius: 4px;
  overflow: hidden;
  margin: 10px 0;
}

#batch-progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0;
  transition: width 0.2s;
}

#batch-progress-text {
  font-size: 12px;
  color: var(--text-dim);
}

/* ===== Adjustment Layer Thumbnail ===== */
.layer-item.adjustment {
  background: linear-gradient(90deg, rgba(76,139,245,0.1), transparent);
}

.layer-item.adjustment .layer-thumb {
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

/* Responsive */
@media (max-width: 1100px) {
  #workspace { grid-template-columns: 0 minmax(0, 1fr) var(--panel-w); }
  #left-panel { display: none; }
}

@media (max-width: 800px) {
  #workspace { grid-template-columns: 0 minmax(0, 1fr) 0; }
  #right-panel { display: none; }
  :root { --toolbar-w: 40px; }
}

/* ===== Custom Tooltip ===== */
.custom-tooltip {
  position: fixed;
  z-index: 10000;
  padding: 6px 10px;
  background: #1a1a1e;
  color: var(--text);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

.custom-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

.custom-tooltip kbd {
  margin-left: 8px;
}

/* Hide default browser tooltips on toolbar items */
#toolbar [title],
#toolbar [data-i18n-title] {
  /* Title attribute removed via JS */
}

/* ===== Split Toning ===== */
.split-tone-group {
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.split-tone-group > label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.split-tone-group:last-of-type {
  border-bottom: none;
  margin-bottom: 4px;
  padding-bottom: 4px;
}

/* ===== Filter Presets ===== */
.presets-list {
  max-height: 120px;
  overflow-y: auto;
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-input);
}

.preset-empty {
  padding: 12px;
  text-align: center;
  color: var(--text-muted);
  font-size: 11px;
  font-style: italic;
}

.preset-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  font-size: 12px;
}

.preset-item:last-child {
  border-bottom: none;
}

.preset-item:hover {
  background: var(--bg-hover);
}

.preset-item.active {
  background: var(--accent-dim);
  color: var(--accent);
}

.preset-item .preset-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preset-item .preset-delete {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preset-item .preset-delete:hover {
  background: var(--danger);
  color: white;
}

.preset-actions {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.preset-actions .btn {
  flex: 1;
  min-width: 60px;
}

/* ===== HSL Channels ===== */
.hsl-channel-select,
.cb-tone-select {
  margin-bottom: 8px;
}

.hsl-channel-select select,
.cb-tone-select select {
  width: 100%;
  padding: 4px 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 12px;
}

/* ===== Menu Labels ===== */
.menu-label {
  display: block;
  padding: 4px 12px;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== Export Dialog ===== */
.export-dialog {
  display: flex;
  gap: 20px;
}

.export-preview-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.export-preview-container {
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-conic-gradient(#333 0% 25%, #444 0% 50%) 50% / 16px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.export-preview-container canvas {
  max-width: 100%;
  max-height: 100%;
}

.export-preview-info {
  text-align: center;
  font-size: 11px;
  color: var(--text-dim);
}

#export-filesize {
  font-weight: 600;
  color: var(--accent);
  margin-top: 2px;
}

.export-options {
  flex: 1;
  min-width: 280px;
}

.export-options .form-row {
  margin-bottom: 10px;
}

.export-options .form-row label {
  min-width: 70px;
}

.export-options input[type="range"] {
  flex: 1;
}

.export-options input[type="number"] {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  color: var(--text);
}

.export-options select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  color: var(--text);
}

.export-options input[type="color"] {
  cursor: pointer;
}

.export-options input[type="color"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.export-options input[type="checkbox"] {
  margin-right: 6px;
}

.export-resize-options {
  margin-left: 20px;
  padding: 8px;
  background: var(--bg-input);
  border-radius: 4px;
}