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

:root {
  --bg: #ffffff;
  --fg: #000000;
  --border: #d0d0d0;
  --border-hover: #a0a0a0;
  --border-active: #000000;
  --panel-bg: #fafafa;
  --hover-bg: #f0f0f0;
  --active-bg: #e8e8e8;
  --radius: 4px;
}

body.anim-app {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', 'Courier New', monospace;
  background: var(--bg);
  color: var(--fg);
  font-size: 13px;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ── Topbar ── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  height: 44px;
  flex-shrink: 0;
}

.topbar-title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.topbar-nav {
  display: flex;
  gap: 16px;
}

.nav-link {
  font-size: 12px;
  color: #666;
  text-decoration: none;
  transition: color 0.15s;
}

.nav-link:hover {
  color: var(--fg);
}

/* ── Editor main ── */
.editor-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  min-height: 0;
  overflow: hidden;
}

.canvas-container {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

#editorCanvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

/* ── Timeline ── */
.timeline {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  background: var(--panel-bg);
  height: 72px;
  flex-shrink: 0;
  overflow: hidden;
}

.timeline-frames {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  flex: 1;
  align-items: center;
  padding-bottom: 2px;
}

.timeline-frames::-webkit-scrollbar {
  height: 3px;
}

.timeline-frames::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.timeline-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  flex-shrink: 0;
  user-select: none;
}

.timeline-item canvas {
  width: 48px;
  height: 48px;
  border: 2px solid var(--border);
  border-radius: 3px;
  background: white;
  image-rendering: pixelated;
  display: block;
}

.timeline-item.active canvas {
  border-color: var(--fg);
}

.timeline-item:hover canvas {
  border-color: var(--border-hover);
}

.timeline-item.active:hover canvas {
  border-color: var(--fg);
}

.frame-label {
  font-size: 10px;
  color: #bbb;
  line-height: 1;
}

.timeline-item.active .frame-label {
  color: var(--fg);
  font-weight: 600;
}

.btn-add-frame {
  width: 48px;
  height: 48px;
  border: 1px dashed var(--border);
  background: none;
  color: #bbb;
  font-size: 22px;
  cursor: pointer;
  border-radius: 3px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.btn-add-frame:hover {
  border-color: var(--fg);
  color: var(--fg);
}

/* ── Bottombar ── */
.bottombar {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border);
  padding: 0 16px;
  height: 56px;
  gap: 0;
  flex-shrink: 0;
  overflow-x: auto;
}

.bar-group {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  border-right: 1px solid var(--border);
  height: 100%;
}

.bar-group:first-child {
  padding-left: 0;
}

.bar-group:last-child {
  border-right: none;
}

.bar-label {
  font-size: 11px;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

/* ── Buttons ── */
.btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  border-radius: var(--radius);
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--hover-bg);
  border-color: var(--border-hover);
}

.btn:active {
  background: var(--active-bg);
}

.btn-secondary {
  background: var(--panel-bg);
}

.btn-play {
  width: 36px;
  height: 32px;
  padding: 0;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-play.playing {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* ── Stepper ── */
.stepper {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px;
  background: var(--bg);
}

.btn-stepper {
  width: 24px;
  height: 24px;
  border: none;
  background: var(--panel-bg);
  color: var(--fg);
  cursor: pointer;
  font-size: 14px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  font-family: inherit;
}

.btn-stepper:hover {
  background: var(--hover-bg);
}

.stepper span {
  min-width: 18px;
  text-align: center;
  font-size: 13px;
  font-weight: 500;
}

/* ── Toggle ── */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 18px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  transition: 0.3s;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 2px;
  bottom: 2px;
  background-color: var(--fg);
  border-radius: 50%;
  transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--active-bg);
  border-color: var(--border-active);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(18px);
}

/* ── Color input ── */
.color-input {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 2px;
  background: var(--bg);
}

.color-input::-webkit-color-swatch-wrapper { padding: 0; }
.color-input::-webkit-color-swatch { border: none; border-radius: 3px; }
.color-input::-moz-color-swatch { border: none; border-radius: 3px; }

/* ── Shape picker ── */
.shape-picker {
  display: flex;
  gap: 4px;
  align-items: center;
}

.shape-btn {
  width: 28px;
  height: 28px;
  padding: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.1s, border-color 0.1s, color 0.1s;
}

.shape-btn:hover {
  background: var(--hover-bg);
  border-color: var(--border-hover);
}

.shape-btn.active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.shape-btn svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ── Mode switch ── */
.btn-mode {
  padding: 5px 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: #999;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  border-radius: var(--radius);
  transition: all 0.15s;
}

.btn-mode.active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* ── Mode visibility ── */
.gen-only { display: none; }

.anim-app.mode-generative .gen-only { display: flex; }
.anim-app.mode-generative .man-only { display: none; }
.anim-app.mode-generative .timeline { display: none; }

/* ── Generative play button ── */
.btn-gen-play.playing {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* ── Palette editor ── */
.palette-editor {
  display: flex;
  gap: 4px;
  align-items: center;
}

.palette-swatch {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  padding: 1px;
  background: var(--bg);
  flex-shrink: 0;
}

.palette-swatch::-webkit-color-swatch-wrapper { padding: 0; }
.palette-swatch::-webkit-color-swatch { border: none; border-radius: 2px; }
.palette-swatch::-moz-color-swatch { border: none; border-radius: 2px; }

/* ── Small select ── */
.select-sm {
  padding: 5px 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font-family: inherit;
  font-size: 12px;
  border-radius: var(--radius);
  cursor: pointer;
}

.select-sm:focus {
  outline: none;
  border-color: var(--border-active);
}