:root {
  --bg-primary: #0a0b10;
  --bg-card: rgba(20, 22, 34, 0.85);
  --bg-card-border: rgba(255, 255, 255, 0.12);
  --accent-cyan: #00d2ff;
  --accent-blue: #0066ff;
  --accent-gradient: linear-gradient(135deg, #0066ff, #00d2ff);
  --accent-boost: linear-gradient(135deg, #ff007f, #7928ca);
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --radius-xl: 24px;
  --radius-lg: 16px;
  --radius-md: 12px;
}

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

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

#app-root {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  position: relative;
}

/* 1. 顶部控制面板 */
.app-header {
  padding: 16px 24px;
  background: rgba(10, 11, 16, 0.95);
  border-bottom: 1px solid var(--bg-card-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 28px;
}

.logo-area h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-area h1 span {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-cyan);
  margin-left: 8px;
  background: rgba(0, 210, 255, 0.1);
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid rgba(0, 210, 255, 0.3);
}

.url-control-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.input-row {
  display: flex;
  gap: 12px;
  width: 100%;
}

#video-input {
  flex: 1;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: all 0.2s ease;
}

#video-input:focus {
  border-color: var(--accent-cyan);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 16px rgba(0, 210, 255, 0.25);
}

#btn-play {
  padding: 12px 24px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

#btn-play:hover {
  transform: translateY(-2px);
  filter: brightness(1.15);
}

.preset-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.chip-btn {
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.chip-btn:hover {
  background: rgba(0, 210, 255, 0.15);
  color: #fff;
  border-color: var(--accent-cyan);
}

/* 2. 视频与 WebGL 视差主体 Viewport */
#player-viewport {
  flex: 1;
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
  overflow: hidden;
}

#source-video {
  display: none;
}

#gl-canvas {
  display: none;
  width: 1920px;
  height: 1080px;
}

#converted-3d-video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
  z-index: 10;
}

/* 引导遮罩 */
#start-guide-mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 11, 16, 0.92);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 50;
  gap: 16px;
  text-align: center;
  padding: 24px;
}

.play-pulse-circle {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 42px;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 0 32px rgba(0, 210, 255, 0.6);
  animation: pulse 2s infinite;
  transition: transform 0.2s ease;
}

.play-pulse-circle:hover {
  transform: scale(1.1);
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 210, 255, 0.7); }
  70% { box-shadow: 0 0 0 24px rgba(0, 210, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 210, 255, 0); }
}

#start-guide-mask h2 {
  font-size: 22px;
  font-weight: 700;
}

#start-guide-mask p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.6;
}

/* 外层独立 Seek 进度条 (悬浮浮于底部，完全不干扰 3D 视频流与原生全屏) */
.bottom-progress-overlay {
  position: absolute;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 64px);
  max-width: 900px;
  display: flex;
  gap: 14px;
  align-items: center;
  background: rgba(15, 17, 26, 0.85);
  padding: 8px 20px;
  border-radius: 20px;
  backdrop-filter: blur(14px);
  border: 1px solid var(--bg-card-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.7);
  z-index: 45;
}

.time-text {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  font-family: monospace;
}

.seek-slider {
  flex: 1;
  accent-color: var(--accent-cyan);
  cursor: pointer;
  height: 6px;
  border-radius: 3px;
}

/* 悬浮 3D 视差微调面板 (置于右上角，不遮挡原生播放条) */
.floating-overlay {
  position: absolute;
  top: 16px;
  right: 20px;
  display: flex;
  gap: 14px;
  align-items: center;
  background: var(--bg-card);
  padding: 8px 20px;
  border-radius: 32px;
  backdrop-filter: blur(16px);
  border: 1px solid var(--bg-card-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8);
  z-index: 40;
}

.ctrl-btn {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 12px;
  transition: background 0.2s;
}

.ctrl-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.time-text {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  font-family: monospace;
}

.seek-slider {
  flex: 1;
  accent-color: var(--accent-cyan);
  cursor: pointer;
  height: 6px;
  border-radius: 3px;
}

.action-btn {
  padding: 8px 18px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn.boost {
  background: var(--accent-boost);
}

.action-btn:hover {
  transform: scale(1.06);
}

.parallax-control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

input[type=range] {
  accent-color: var(--accent-cyan);
  width: 100px;
}

#parallax-val {
  font-weight: 600;
  color: var(--accent-cyan);
  min-width: 24px;
}

/* Toast 提示 */
.toast-card {
  position: absolute;
  top: 90px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 210, 255, 0.95);
  color: #000;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: 20px;
  font-size: 14px;
  box-shadow: 0 4px 20px rgba(0, 210, 255, 0.5);
  z-index: 99;
  display: none;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translate(-50%, -10px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}