/* Main Layout Styles */
.motion-editor-app {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-darkest);
}

/* App Header */
.app-header {
  height: var(--header-height);
  background-color: var(--bg-darker);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  z-index: 100;
  flex-shrink: 0;
}

.header-left, .header-center, .header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  margin-right: 8px;
}
.brand-title {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.3px;
  color: #fff;
}
.accent-text {
  color: var(--accent-primary);
}

.project-info {
  display: flex;
  align-items: center;
  gap: 8px;
}
.project-title-input {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-main);
  font-weight: 500;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  max-width: 160px;
  text-overflow: ellipsis;
  transition: all 0.15s ease;
}
.project-title-input:hover {
  background: var(--bg-surface);
}
.project-title-input:focus {
  background: var(--bg-darkest);
  border-color: var(--border-focus);
}

.hdr-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 5px 9px;
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}
.hdr-btn:hover:not(:disabled) {
  background: var(--bg-surface);
  color: var(--text-main);
}
.hdr-btn:active:not(:disabled) {
  background: var(--bg-hover);
}
.hdr-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.hdr-btn.highlight {
  color: var(--accent-amber);
}
.hdr-btn.primary {
  background: var(--accent-primary);
  color: #fff;
  font-weight: 600;
  padding: 5px 12px;
}
.hdr-btn.primary:hover {
  background: var(--accent-hover);
}

.hdr-divider {
  width: 1px;
  height: 20px;
  background: var(--border-subtle);
  margin: 0 4px;
}

/* Main Body (Toolbar + Canvas + Inspector) */
.main-body {
  display: flex;
  flex: 1;
  position: relative;
  overflow: hidden;
}

/* Left Toolbar */
.left-toolbar {
  width: var(--toolbar-width);
  background-color: var(--bg-darker);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 0;
  flex-shrink: 0;
  z-index: 50;
}

.tool-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  align-items: center;
}

.tool-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
}
.tool-btn:hover {
  background: var(--bg-surface);
  color: var(--text-main);
}
.tool-btn.active {
  background: var(--accent-primary);
  color: #fff;
}

.tool-separator {
  width: 24px;
  height: 1px;
  background: var(--border-subtle);
  margin: 8px 0;
}

.tool-spacer {
  flex: 1;
}

/* Asset Drawer */
.asset-drawer {
  position: absolute;
  top: 0;
  left: var(--toolbar-width);
  bottom: 0;
  width: 280px;
  background: var(--bg-dark);
  border-right: 1px solid var(--border-subtle);
  z-index: 40;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease;
}
.drawer-header {
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--border-subtle);
  font-weight: 600;
}
.drawer-content {
  padding: 12px;
  overflow-y: auto;
  flex: 1;
}
.asset-dropzone {
  border: 2px dashed var(--border-muted);
  border-radius: var(--radius-md);
  padding: 20px 12px;
  text-align: center;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  margin-bottom: 12px;
  transition: border-color 0.15s ease;
}
.asset-dropzone:hover, .asset-dropzone.drag-over {
  border-color: var(--accent-primary);
  background: rgba(59, 130, 246, 0.05);
}
.asset-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.asset-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px;
  cursor: grab;
  text-align: center;
}
.asset-item:hover {
  border-color: var(--accent-primary);
}
.asset-thumb {
  width: 100%;
  height: 70px;
  object-fit: cover;
  border-radius: var(--radius-xs);
  background: var(--bg-darkest);
}
.asset-name {
  font-size: 11px;
  color: var(--text-main);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 4px;
}

/* Center Canvas Viewport */
.canvas-viewport {
  flex: 1;
  background-color: var(--bg-darkest);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Canvas HUD Controls */
.canvas-hud {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(26, 30, 36, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 4px 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 30;
  box-shadow: var(--shadow-sm);
}
.hud-group {
  display: flex;
  align-items: center;
  gap: 4px;
}
.hud-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  border-radius: var(--radius-xs);
  padding: 4px 6px;
  font-size: 11px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.hud-btn:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}
.hud-btn.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-primary);
}
.hud-zoom-val {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-main);
  width: 44px;
  text-align: center;
  cursor: pointer;
}
.hud-separator {
  width: 1px;
  height: 16px;
  background: var(--border-subtle);
  margin: 0 4px;
}

/* Canvas Rulers */
.canvas-ruler {
  position: absolute;
  background: var(--bg-darker);
  z-index: 25;
  pointer-events: none;
}
.top-ruler {
  top: 0;
  left: var(--ruler-thickness);
  right: 0;
  height: var(--ruler-thickness);
  border-bottom: 1px solid var(--border-subtle);
}
.left-ruler {
  top: var(--ruler-thickness);
  left: 0;
  width: var(--ruler-thickness);
  bottom: 0;
  border-right: 1px solid var(--border-subtle);
}

/* Canvas Stage & Shadow Box */
.canvas-stage-wrapper {
  position: absolute;
  cursor: default;
  will-change: transform;
}
.canvas-stage-wrapper.pan-mode {
  cursor: grab;
}
.canvas-stage-wrapper.panning {
  cursor: grabbing;
}

.canvas-shadow-box {
  background-color: #121316;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 20px 50px rgba(0, 0, 0, 0.8);
  position: relative;
  overflow: visible;
}
#main-motion-canvas {
  display: block;
  transform-origin: 0 0;
}

/* Snap Guide Canvas (Overlaid across viewport) */
.snap-guide-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 20;
}

/* Right Inspector Panel */
.right-inspector {
  width: var(--inspector-width);
  background-color: var(--bg-darker);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 50;
  overflow: hidden;
}

.inspector-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-dark);
  flex-shrink: 0;
}
.tab-btn {
  flex: 1;
  padding: 8px 4px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}
.tab-btn:hover {
  color: var(--text-main);
}
.tab-btn.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
  background: var(--bg-surface);
}

.tab-content {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}
.tab-content.active {
  display: block;
}