/* === 全局重置与基础 === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --panel-bg: rgba(0, 0, 0, 0.7);
  --panel-border: rgba(255, 255, 255, 0.12);
  --text-primary: rgba(255, 255, 255, 0.9);
  --text-secondary: rgba(255, 255, 255, 0.6);
  --accent: #4a9eff;
  --accent-hover: #6ab4ff;
  --radius: 10px;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #1a1a2e;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  color: var(--text-primary);
  user-select: none;
}

/* === 视频背景层 === */
#video-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  display: none;
}

#video-background.active {
  display: block;
}

/* === Canvas 容器 === */
#canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

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

#canvas-container.interactive {
  pointer-events: auto;
}

/* 视频模式：canvas 居中，非全屏 */
#canvas-container.video-sized {
  /* canvas 由 JS 定位，容器不干预 */
}

#canvas-container.video-sized #render-canvas {
  border-radius: 0;
}

/* === 通用面板 === */
.panel {
  position: absolute;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10;
  min-width: 220px;
  overflow: hidden;
  transition: opacity 0.25s ease;
}

.panel.hidden {
  display: none;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 1px solid var(--panel-border);
  letter-spacing: 0.5px;
}

.toggle-arrow {
  font-size: 10px;
  transition: transform 0.2s ease;
}

.panel.collapsed .toggle-arrow {
  transform: rotate(-90deg);
}

.panel.collapsed .panel-content {
  display: none;
}

.panel-content {
  padding: 10px 14px;
  max-height: 60vh;
  overflow-y: auto;
}

/* === 顶部状态栏 === */
#status-bar {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 20;
  display: flex;
  gap: 16px;
  align-items: center;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 12px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

#status-renderer {
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.status-sep {
  color: var(--text-secondary);
  opacity: 0.3;
  font-size: 14px;
  margin: 0 2px;
}

.bg-control {
  display: flex;
  align-items: center;
  gap: 4px;
}

.bg-label {
  font-size: 11px;
  color: var(--text-secondary);
}

.bg-control input[type="color"] {
  width: 20px;
  height: 20px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.bg-toggle {
  width: 24px;
  height: 24px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  background: transparent;
  color: var(--text-primary);
  font-size: 12px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: all 0.15s ease;
}

.bg-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.bg-toggle.off {
  opacity: 0.4;
  border-color: rgba(255, 100, 100, 0.4);
}

/* === 左侧场景对象列表 === */
#objects-panel {
  top: 100px;
  left: 250px;
}

#objects-list {
  list-style: none;
  min-width: 180px;
}

#objects-list li {
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-secondary);
  transition: all 0.15s ease;
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: 6px;
}

#objects-list li:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

#objects-list li.active {
  background: rgba(74, 158, 255, 0.2);
  color: var(--accent);
}

#objects-list li .obj-icon {
  font-size: 14px;
  flex-shrink: 0;
}

#objects-list li .obj-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#objects-list li .obj-type {
  font-size: 9px;
  opacity: 0.5;
  flex-shrink: 0;
}

#objects-list li .obj-action {
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  font-size: 11px;
  line-height: 1;
  padding: 0;
  opacity: 0;
  transition: opacity 0.15s ease, background 0.15s ease;
  flex-shrink: 0;
}

#objects-list li:hover .obj-action {
  opacity: 0.7;
}

#objects-list li .obj-action:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.15);
}

#objects-list li .obj-delete:hover {
  background: rgba(255, 80, 80, 0.3);
  color: #ff6666;
}

#objects-list li.hidden-item .obj-name {
  opacity: 0.4;
}
#camera-panel {
  top: 100px;
  left: 20px;
}

#camera-list {
  list-style: none;
}

#camera-list li {
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-secondary);
  transition: all 0.15s ease;
  margin-bottom: 2px;
}

#camera-list li:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

#camera-list li.active {
  background: rgba(74, 158, 255, 0.2);
  color: var(--accent);
}

#camera-list li .cam-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

#camera-list li .cam-meta {
  display: flex;
  gap: 8px;
  font-size: 10px;
  opacity: 0.7;
}

#camera-list li .cam-type {
  font-size: 10px;
}

#camera-list li .cam-fov {
  font-family: var(--font-mono);
}

#camera-list li .cam-pos {
  font-size: 9px;
  font-family: var(--font-mono);
  opacity: 0.5;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* === 右上参数面板 === */
#params-panel {
  top: 20px;
  right: 20px;
  width: 260px;
}

.tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.tab-btn {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  background: rgba(74, 158, 255, 0.2);
  border-color: var(--accent);
  color: var(--text-primary);
}

.tab-content.hidden {
  display: none;
}

/* 参数滑块 */
.param-group {
  margin-bottom: 10px;
}

.param-label {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.param-group input[type="range"] {
  width: calc(100% - 50px);
  vertical-align: middle;
  accent-color: var(--accent);
}

.param-value {
  display: inline-block;
  width: 42px;
  text-align: right;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-primary);
  vertical-align: middle;
}

.param-group input[type="color"] {
  width: 32px;
  height: 24px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.param-hint {
  font-size: 10px;
  color: var(--text-secondary);
  opacity: 0.6;
  margin-top: 12px;
  line-height: 1.4;
}

/* 参数节标题 */
.param-section-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  opacity: 0.5;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 10px 0 6px 0;
  padding-top: 8px;
  border-top: 1px solid var(--panel-border);
}

/* 粒子样式选择按钮 */
.style-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}

.style-btn {
  flex: 1;
  padding: 6px 4px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.style-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.style-btn.active {
  background: rgba(74, 158, 255, 0.2);
  border-color: var(--accent);
  color: var(--text-primary);
}

#smoke-style-bar {
  flex-wrap: wrap;
}

#smoke-style-bar .style-btn {
  flex: 1 1 calc(50% - 6px);
  min-width: 96px;
}

/* === 底部工具栏 === */
#toolbar {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  gap: 12px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 8px 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-primary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
}

.tool-btn:active {
  transform: scale(0.97);
}

.tool-btn.primary {
  background: rgba(74, 158, 255, 0.25);
  border-color: var(--accent);
}

.tool-btn.primary:hover {
  background: rgba(74, 158, 255, 0.4);
}

.tool-btn.off {
  opacity: 0.5;
  border-color: rgba(255, 100, 100, 0.4);
}

.tool-btn.recording {
  background: rgba(255, 80, 80, 0.25);
  border-color: rgba(255, 80, 80, 0.6);
  animation: pulse-record 1.5s ease-in-out infinite;
}

@keyframes pulse-record {
  0%, 100% { box-shadow: 0 0 4px rgba(255, 80, 80, 0.3); }
  50% { box-shadow: 0 0 12px rgba(255, 80, 80, 0.6); }
}

.btn-icon {
  font-size: 14px;
}

/* === 加载蒙层 === */
#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

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

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

#loading-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* === 滚动条 === */
.panel-content::-webkit-scrollbar {
  width: 4px;
}

.panel-content::-webkit-scrollbar-track {
  background: transparent;
}

.panel-content::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
}

/* === 导出模态框 === */
.modal-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.65);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

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

.modal-box {
  background: rgba(20, 20, 40, 0.95);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 24px 28px;
  min-width: 300px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.modal-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.modal-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.modal-value {
  font-size: 13px;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.modal-input {
  width: 70px;
  padding: 5px 8px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font-mono);
  text-align: center;
}

.modal-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
}

.modal-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.modal-btn {
  padding: 8px 18px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.modal-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.modal-btn.primary {
  background: rgba(74, 158, 255, 0.25);
  border-color: var(--accent);
}

.modal-btn.primary:hover {
  background: rgba(74, 158, 255, 0.4);
}

/* === 画幅面板 === */
#frame-panel {
  position: absolute;
  top: 76px;
  left: 20px;
  z-index: 20;
  display: flex;
  gap: 6px;
  align-items: center;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 6px 12px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.frame-label {
  font-size: 11px;
  color: var(--text-secondary);
  margin-right: 4px;
}

#frame-panel input[type="number"] {
  width: 62px;
  padding: 3px 6px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  font-size: 11px;
  font-family: var(--font-mono);
  text-align: center;
}

.frame-sep {
  font-size: 11px;
  color: var(--text-secondary);
  opacity: 0.5;
}

/* === 导入场景缩放 === */
#scene-scale-panel {
  top: 76px;
  left: 245px;
  z-index: 20;
  width: 330px;
  padding: 8px 10px;
}

.scene-scale-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.scene-scale-label {
  flex: 0 0 auto;
  font-size: 11px;
  color: var(--text-secondary);
}

#scene-scale-log {
  flex: 1;
  min-width: 90px;
  accent-color: var(--accent);
}

.scene-scale-value {
  flex: 0 0 48px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 11px;
}

.scene-scale-reset {
  flex: 0 0 auto;
  border: 1px solid var(--panel-border);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  font-size: 11px;
  padding: 4px 8px;
  cursor: pointer;
}

.scene-scale-reset:hover {
  background: rgba(255, 255, 255, 0.12);
}

.scene-scale-info {
  margin-top: 5px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* === 绿框覆盖层 === */
#export-frame-border {
  position: absolute;
  pointer-events: none;
  border: 2px solid #00ff00;
  z-index: 5;
  display: none;
  box-shadow: 0 0 6px rgba(0, 255, 0, 0.3);
}

/* === 响应式 === */
@media (max-width: 768px) {
  #toolbar {
    gap: 6px;
    padding: 6px 10px;
    bottom: 16px;
  }
  .tool-btn {
    padding: 6px 10px;
    font-size: 11px;
  }
  #params-panel {
    width: 220px;
  }
}

/* === 时间线面板 === */
#timeline-panel {
  position: absolute;
  bottom: 95px;
  left: 50%;
  transform: translateX(-50%);
  width: 92%;
  max-width: 1300px;
  z-index: 15;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

#timeline-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  padding: 4px 0;
}

.tl-btn {
  padding: 4px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.tl-btn:hover { background: rgba(255,255,255,0.1); }
.tl-btn.active { border-color: var(--accent); background: rgba(74,158,255,0.2); }
.tl-btn.recording {
  border-color: #ff4444;
  background: rgba(255,68,68,0.2);
  animation: tl-pulse-record 1.5s ease-in-out infinite;
}

@keyframes tl-pulse-record {
  0%, 100% { box-shadow: 0 0 4px rgba(255,68,68,0.3); }
  50% { box-shadow: 0 0 12px rgba(255,68,68,0.7); }
}

.tl-sep {
  color: var(--text-secondary);
  opacity: 0.3;
  margin: 0 4px;
  user-select: none;
}

#timeline-time-display {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-primary);
  min-width: 140px;
  text-align: center;
}

#timeline-frame-display {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  opacity: 0.7;
  min-width: 76px;
  text-align: center;
}

.tl-label {
  font-size: 11px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tl-label input[type="number"] {
  width: 48px;
  padding: 2px 4px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  font-size: 11px;
  font-family: var(--font-mono);
  text-align: center;
}

#timeline-ruler {
  position: relative;
  height: 20px;
  margin: 4px 0;
  border-top: 1px solid var(--panel-border);
  border-bottom: 1px solid var(--panel-border);
  overflow: hidden;
}

#timeline-playhead {
  position: absolute;
  top: 0; left: 0;
  width: 2px;
  height: 100%;
  background: var(--accent);
  pointer-events: none;
  z-index: 2;
}

#timeline-scrubber {
  width: 100%;
  margin: 2px 0 4px 0;
  accent-color: var(--accent);
  height: 4px;
  cursor: pointer;
}

.ruler-tick {
  position: absolute;
  top: 0;
  width: 1px;
  height: 100%;
  background: rgba(255,255,255,0.08);
  pointer-events: none;
}

.ruler-tick-label {
  position: absolute;
  top: 2px;
  font-size: 9px;
  color: var(--text-secondary);
  opacity: 0.5;
  pointer-events: none;
  white-space: nowrap;
}

.kf-marker {
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  background: #e8b830;
  border: 1px solid rgba(255, 255, 255, 0.25);
  transform: translate(-50%, -50%) rotate(45deg);
  cursor: pointer;
  z-index: 1;
  pointer-events: auto;
  transition: background 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 0 4px rgba(232, 184, 48, 0.3);
}

.kf-marker:hover {
  background: #f0d060;
  box-shadow: 0 0 6px rgba(232, 184, 48, 0.6);
}