/**
 * 预览播放器样式 — V21 设计系统
 * 任务 2.16
 */

/* ============================================================
   预览播放器容器
   ============================================================ */
.ep-preview {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
}

/* ── 预览画面 ── */
.ep-preview-screen {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 280px;
  overflow: hidden;
  background: #0f0f14;
  border-radius: 0;
}

.ep-preview-visual {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  transition: background 0.4s ease;
}

/* 片段类型大图标 */
.ep-preview-type-icon {
  font-size: 56px;
  opacity: 0.7;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
  animation: ep-preview-float 3s ease-in-out infinite;
}

@keyframes ep-preview-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* 文案字幕 */
.ep-preview-subtitle {
  max-width: 80%;
  padding: 8px 20px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
  letter-spacing: 0.02em;
}

/* 片段序号角标 */
.ep-preview-clip-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

/* 素材类型标签 */
.ep-preview-material-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(6px);
  color: rgba(255, 255, 255, 0.85);
  font-size: 11px;
  text-transform: capitalize;
}

/* 空状态 */
.ep-preview-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: rgba(255, 255, 255, 0.4);
}

.ep-preview-empty-icon {
  font-size: 48px;
  margin-bottom: var(--space-sm);
  opacity: 0.5;
}

.ep-preview-empty p {
  margin: 0;
  font-size: var(--font-size-sm);
}

/* ============================================================
   控制栏
   ============================================================ */
.ep-preview-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 8px var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: #16161e;
}

/* 时间显示 */
.ep-preview-time {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  min-width: 90px;
}

.ep-preview-time-current {
  color: #fff;
  font-weight: 600;
}

.ep-preview-time-sep {
  color: rgba(255, 255, 255, 0.3);
}

.ep-preview-time-total {
  color: rgba(255, 255, 255, 0.5);
}

/* 播放按钮组 */
.ep-preview-buttons {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.ep-preview-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-all);
}

.ep-preview-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.ep-preview-btn-play {
  width: 40px;
  height: 40px;
  background: var(--primary-color);
  color: #fff;
  font-size: 16px;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.4);
}

.ep-preview-btn-play:hover {
  background: var(--primary-hover);
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.5);
}

/* 片段信息 */
.ep-preview-clip-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 12px;
  min-width: 90px;
  justify-content: flex-end;
}

.ep-preview-clip-idx {
  color: rgba(255, 255, 255, 0.6);
}

.ep-preview-clip-dur {
  color: var(--primary-color);
  font-weight: 600;
  background: rgba(79, 70, 229, 0.15);
  padding: 1px 8px;
  border-radius: 999px;
}

/* ============================================================
   进度条（可拖拽）
   ============================================================ */
.ep-preview-progress {
  position: relative;
  height: 20px;
  padding: 7px var(--space-lg);
  cursor: pointer;
  user-select: none;
  background: #16161e;
}

.ep-preview-progress-track {
  position: relative;
  height: 6px;
  display: flex;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  overflow: hidden;
}

.ep-preview-progress-segment {
  height: 100%;
  transition: opacity 0.2s ease;
}

.ep-preview-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 3px;
  pointer-events: none;
}

.ep-preview-progress-handle {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  background: #fff;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  transition: transform 0.1s ease;
  pointer-events: none;
  z-index: 2;
}

.ep-preview-progress:hover .ep-preview-progress-handle {
  transform: translate(-50%, -50%) scale(1.2);
}

/* ============================================================
   迷你时间线
   ============================================================ */
.ep-preview-timeline {
  position: relative;
  display: flex;
  height: 28px;
  gap: 2px;
  padding: 0 var(--space-lg);
  background: #12121a;
  overflow: hidden;
}

.ep-preview-timeline-seg {
  height: 100%;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-all);
  min-width: 8px;
  position: relative;
}

.ep-preview-timeline-seg:hover {
  opacity: 0.85;
  transform: scaleY(1.08);
}

.ep-preview-timeline-seg.active {
  opacity: 1;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.ep-preview-timeline-seg.selected {
  box-shadow: 0 0 0 2px var(--primary-color);
}

.ep-preview-timeline-seg-label {
  font-size: 10px;
  opacity: 0.8;
  pointer-events: none;
}

/* 播放头 */
.ep-preview-playhead {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: #fff;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 3;
  box-shadow: 0 0 4px rgba(255, 255, 255, 0.5);
}

/* ============================================================
   片段内进度条
   ============================================================ */
.ep-preview-clip-progress {
  height: 3px;
  background: rgba(255, 255, 255, 0.06);
}

.ep-preview-clip-progress-fill {
  height: 100%;
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1200px) {
  .ep-preview-screen {
    max-height: 240px;
  }
}

@media (max-width: 900px) {
  .ep-preview-screen {
    max-height: 200px;
  }

  .ep-preview-type-icon {
    font-size: 40px;
  }

  .ep-preview-subtitle {
    font-size: 13px;
    padding: 6px 14px;
  }

  .ep-preview-time {
    min-width: 70px;
    font-size: 11px;
  }

  .ep-preview-clip-info {
    min-width: 70px;
    font-size: 11px;
  }
}

@media (max-width: 768px) {
  .ep-preview-screen {
    max-height: 180px;
  }

  .ep-preview-controls {
    padding: 6px var(--space-md);
    gap: var(--space-sm);
  }

  .ep-preview-btn-play {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .ep-preview-timeline {
    height: 22px;
    padding: 0 var(--space-md);
  }
}

@media (max-width: 480px) {
  .ep-preview-screen {
    max-height: 140px;
  }

  .ep-preview-type-icon {
    font-size: 32px;
  }

  .ep-preview-subtitle {
    font-size: 12px;
    max-width: 90%;
  }

  .ep-preview-clip-badge,
  .ep-preview-material-tag {
    font-size: 10px;
    padding: 2px 6px;
  }

  .ep-preview-clip-info {
    display: none;
  }

  .ep-preview-time {
    min-width: auto;
  }
}