/* 序列帧播放器布局 */

.player-stage {
  width: 100%;
  height: 100%;
  padding: 0;
  background: transparent;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.preview-card-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.player-stage-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  flex: 1;
}

.player-display {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.player-image-shell {
  width: 100%;
  height: 100%;
  border-radius: 16px;
  /* 棋盘格背景用于显示透明部分 */
  background-color: #f8f9fb;
  background-image: 
    linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
    linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
    linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  min-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border: 2px dashed #d1d5db;
  box-shadow: inset 0 0 0 1px #edf0f6;
}



.player-image-shell.is-dragging {
  background: #f0f7ff;
  border: 3px dashed #3b82f6;
  box-shadow: inset 0 0 0 8px rgba(59, 130, 246, 0.1);
}

.drop-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 5;
}

.drop-hint[hidden] {
  display: none;
}

.hint-text {
  margin: 0;
  padding: 0;
  font-size: 20px;
  font-weight: 600;
  color: #ef4444;
  letter-spacing: 1px;
  text-align: center;
}

.player-image-shell img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  image-rendering: pixelated;
}

.player-image-shell img:not([src]),
.player-image-shell img[src=""],
.player-image-shell img.is-hidden {
  opacity: 0;
  visibility: hidden;
  display: none;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  background: rgba(248, 249, 251, 0.92);
  backdrop-filter: blur(4px);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.loading-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.loading-overlay .loading-spinner {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 4px solid rgba(59, 130, 246, 0.15);
  border-top-color: #3b82f6;
  animation: spin 0.8s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
  position: relative;
}

.loading-overlay .loading-spinner::before {
  content: "";
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  animation: pulse-glow 1.5s ease-in-out infinite;
}

.loading-overlay .loading-text {
  margin: 0;
  font-size: 14px;
  font-weight: 500;
  color: #6b7280;
  letter-spacing: 0.02em;
  animation: fade-pulse 1.5s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    transform: scale(0.9);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.1);
    opacity: 1;
  }
}

@keyframes fade-pulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

.player-image-shell .image-error {
  position: absolute;
  top: 24px;
  left: 24px;
  padding: 10px 16px;
  border-radius: 12px;
  background: rgba(120, 124, 138, 0.92);
  color: #fff;
  font-size: 15px;
  z-index: 20;
}


.panel-card {
  width: 100%;
  flex-shrink: 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  padding: 16px 0;
  border: none;
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  width: 100%;
  flex-wrap: wrap;
}

.folder-label {
  font-size: 14px;
  font-weight: 600;
  color: #9ca3af;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.slider-container {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 1;
  max-width: 520px;
  padding: 16px 18px;
  border-radius: 18px;
  background: #f4f6fb;
  box-shadow: inset 0 0 0 1px #e7eaf2;
}

.fps-slider {
  flex: 1;
  height: 10px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(90deg, #e5e7eb 0%, #c7ccd9 100%);
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  transition: background 0.2s ease, box-shadow 0.2s ease;
  box-shadow: inset 0 2px 6px rgba(15, 23, 42, 0.08);
}

.fps-slider::-webkit-slider-runnable-track {
  height: 10px;
  border-radius: 999px;
  background: transparent;
}

.fps-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: #111827;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  margin-top: -6px;
}

.fps-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 8px 22px rgba(17, 24, 39, 0.3);
}

.fps-slider::-webkit-slider-thumb:active {
  transform: scale(1.05);
}

.fps-slider::-moz-range-track {
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, #e5e7eb 0%, #c7ccd9 100%);
}

.fps-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: #111827;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.fps-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 8px 22px rgba(17, 24, 39, 0.3);
}

.fps-value {
  min-width: 88px;
  padding: 8px 14px;
  background: #111827;
  color: #ffffff;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  font-family: "SF Mono", "Monaco", "Inconsolata", "Roboto Mono", monospace;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.25);
}

@media (max-width: 900px) {
  .player-image-shell {
    min-height: 60vh;
  }

  .control-row {
    flex-direction: column;
  }

  .slider-container {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .panel-card {
    padding: 20px 0;
  }

  .slider-container {
    padding: 14px;
  }

  .fps-value {
    width: 100%;
  }
}
