:root {
  --bg: #1a1a1a;
  --panel: #232323;
  --panel-2: #2c2c2c;
  --border: #333;
  --text: #e8e8e8;
  --muted: #888;
  --accent: #C65D3B;
  --accent-2: #E8946C;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 13px;
}

body {
  display: grid;
  grid-template-columns: 360px 1fr;
  height: 100vh;
  overflow: hidden;
}

#controls {
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 16px;
}

#controls header h1 {
  font-size: 16px;
  margin: 0 0 12px;
}

#controls section {
  border-top: 1px solid var(--border);
  padding: 14px 0;
}

#controls .section {
  border-top: 1px solid var(--border);
  padding: 0;
}
#controls .section > summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 0 10px;
  display: flex;
  align-items: center;
  user-select: none;
}
#controls .section > summary::-webkit-details-marker { display: none; }
#controls .section > summary::before {
  content: '';
  width: 0;
  height: 0;
  border-left: 5px solid var(--muted);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  margin-right: 8px;
  transition: transform 0.15s;
}
#controls .section[open] > summary::before {
  transform: rotate(90deg);
}
#controls .section > summary > h2 {
  margin: 0;
  flex: 1;
}
#controls .section[open] {
  padding-bottom: 14px;
}

#controls h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 10px;
}

label {
  display: block;
  margin: 8px 0;
  font-size: 12px;
  color: var(--muted);
}

label input, label select, label textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  padding: 6px 8px;
  font: inherit;
}

label input[type="checkbox"] {
  display: inline-block;
  width: auto;
  margin-right: 6px;
  vertical-align: middle;
}

label input[type="range"] {
  padding: 0;
}

label input[type="color"] {
  height: 32px;
  padding: 2px;
  cursor: pointer;
}

textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 12px;
  font: inherit;
  cursor: pointer;
}
button:hover { background: #383838; }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}
button.primary:hover { background: var(--accent-2); }

.row {
  display: flex;
  gap: 8px;
  margin: 6px 0;
}
.row > * { flex: 1; }

.val {
  display: inline-block;
  margin-left: 6px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}

.hint {
  color: var(--muted);
  font-size: 11px;
  margin: 6px 0;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.dropzone.drag { border-color: var(--accent); color: var(--accent); }
.dropzone.has-image { border-style: solid; color: var(--text); }

.palettes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-bottom: 8px;
}
.palette-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  background: var(--panel-2);
  font-size: 11px;
}
.palette-chip:hover { border-color: var(--accent); }
.palette-chip.active {
  border-color: var(--accent);
  background: rgba(198, 93, 59, 0.18);
}
.palette-swatches {
  display: flex;
  gap: 2px;
}
.palette-swatch {
  width: 10px;
  height: 14px;
  border-radius: 2px;
  border: 1px solid rgba(0,0,0,0.2);
}

#main, #stage {
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 20px;
  background: #111;
}

#canvas-wrap {
  position: relative;
  height: calc(100vh - 40px);
}

#preview {
  display: block;
  height: 100%;
  width: auto;
  background: #000;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
  border-radius: 4px;
}

#overlay-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.overlay-item {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  margin: 8px 0;
  position: relative;
}
.overlay-item h3 {
  margin: 0 0 8px;
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.overlay-item .delete {
  background: transparent;
  color: var(--muted);
  border: none;
  cursor: pointer;
  padding: 2px 6px;
}
.overlay-item .delete:hover { color: #ff6b6b; }

.handle {
  position: absolute;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: 2px solid white;
  border-radius: 50%;
  pointer-events: auto;
  cursor: pointer;
  transform: translate(-50%, -50%);
}
.region-box {
  position: absolute;
  border: 2px dashed var(--accent);
  background: rgba(198, 93, 59, 0.1);
  pointer-events: auto;
  cursor: move;
}
.region-box.dst {
  border-style: solid;
  border-color: var(--accent-2);
  background: rgba(232, 148, 108, 0.05);
}

.ss-outline {
  position: absolute;
  border: 1px dashed rgba(232, 148, 108, 0.6);
  pointer-events: none;
}
.handle.ss-move {
  background: var(--accent-2);
  width: 18px;
  height: 18px;
}
.handle.ss-vmove {
  background: var(--accent-2);
  width: 28px;
  height: 10px;
  border-radius: 4px;
}
.handle.ss-resize {
  background: white;
  border-color: var(--accent-2);
  border-radius: 3px;
}