/* ========================================
   转印页样式 - 编辑区、控制面板、上传区域等
   ======================================== */

/* ---- 转印页布局 ---- */
.preview-page {
  padding-top: var(--nav-height);
  min-height: 100vh;
  background: var(--color-cream);
}

.preview-page__container {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
}

.preview-page__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.preview-page__title {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-ink);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.preview-page__subtitle {
  font-size: 0.95rem;
  color: var(--color-gray-dark);
}

/* ---- 主内容区 ---- */
.preview-page__body {
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
}

/* ---- 编辑区 ---- */
.transfer-editor {
  flex: 1;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 2px solid var(--color-gold);
  box-shadow: var(--shadow-md);
  min-height: 500px;
}

.transfer-editor__canvas-wrapper {
  position: relative;
  width: 100%;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray);
  background-image:
    linear-gradient(45deg, var(--color-cream) 25%, transparent 25%),
    linear-gradient(-45deg, var(--color-cream) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--color-cream) 75%),
    linear-gradient(-45deg, transparent 75%, var(--color-cream) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

.transfer-editor__canvas-wrapper canvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
}

.transfer-editor__cutout-layer {
  position: absolute;
  cursor: move;
  transition: box-shadow var(--transition-fast);
  user-select: none;
}

.transfer-editor__cutout-layer:hover {
  box-shadow: 0 0 0 2px var(--color-gold);
}

.transfer-editor__cutout-layer--selected {
  box-shadow: 0 0 0 2px var(--color-red), 0 0 12px rgba(196, 26, 26, 0.3);
}

.transfer-editor__cutout-layer--selected::before {
  content: '';
  position: absolute;
  top: -6px;
  left: -6px;
  right: -6px;
  bottom: -6px;
  border: 1px dashed var(--color-red);
  pointer-events: none;
}

.transfer-editor__resize-handle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--color-white);
  border: 2px solid var(--color-red);
  border-radius: 50%;
  cursor: nwse-resize;
  z-index: 5;
}

.transfer-editor__resize-handle--tl {
  top: -5px;
  left: -5px;
  cursor: nwse-resize;
}

.transfer-editor__resize-handle--tr {
  top: -5px;
  right: -5px;
  cursor: nesw-resize;
}

.transfer-editor__resize-handle--bl {
  bottom: -5px;
  left: -5px;
  cursor: nesw-resize;
}

.transfer-editor__resize-handle--br {
  bottom: -5px;
  right: -5px;
  cursor: nwse-resize;
}

.transfer-editor__empty {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  color: var(--color-gray-dark);
  pointer-events: none;
  z-index: 1;
}

.transfer-editor__empty-icon {
  font-size: 3rem;
  opacity: 0.3;
}

.transfer-editor__empty-text {
  font-size: 0.95rem;
}

/* ---- 加载状态 ---- */
.transfer-editor__loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  z-index: 2;
  pointer-events: none;
}

.transfer-editor__loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-gray);
  border-top-color: var(--color-red);
  border-radius: 50%;
  animation: transfer-loading-spin 0.8s linear infinite;
}

.transfer-editor__loading-text {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-gray-dark);
}

@keyframes transfer-loading-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.transfer-editor__toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-white);
  border-top: 1px solid var(--color-gray);
}

.transfer-editor__tool-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  color: var(--color-gray-dark);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.transfer-editor__tool-btn:hover {
  background: var(--color-cream);
  color: var(--color-ink);
}

.transfer-editor__tool-btn--active {
  background: rgba(196, 26, 26, 0.08);
  color: var(--color-red);
}

.transfer-editor__tool-separator {
  width: 1px;
  height: 20px;
  background: var(--color-gray);
}

/* ---- AI转印按钮 ---- */
.transfer-editor__ai-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 28px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-red), var(--color-red-dark));
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.transfer-editor__ai-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(201, 168, 76, 0.25), transparent);
  transition: left var(--transition-slow);
}

.transfer-editor__ai-btn:hover {
  box-shadow: var(--shadow-gold);
  transform: translateY(-1px);
}

.transfer-editor__ai-btn:hover::before {
  left: 100%;
}

.transfer-editor__ai-btn:active {
  transform: translateY(0);
}

.transfer-editor__ai-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.transfer-editor__ai-btn i {
  font-size: 1rem;
}

/* ---- 控制面板 ---- */
.control-panel {
  width: 300px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.control-panel__section {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray);
  padding: var(--space-lg);
}

.control-panel__section-title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-gray);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.control-panel__section-icon {
  color: var(--color-gold);
  font-size: 1.1rem;
}

/* ---- 滑块组 ---- */
.slider-group {
  margin-bottom: var(--space-md);
}

.slider-group:last-child {
  margin-bottom: 0;
}

.slider-group__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
}

.slider-group__name {
  font-size: 0.85rem;
  color: var(--color-ink);
}

.slider-group__value {
  font-size: 0.8rem;
  color: var(--color-gold);
  font-weight: 600;
  min-width: 36px;
  text-align: right;
}

.slider-group__track {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--color-gray);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.slider-group__track::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-red);
  border: 2px solid var(--color-gold);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.slider-group__track::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: var(--shadow-md);
}

.slider-group__track::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-red);
  border: 2px solid var(--color-gold);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.slider-group__track:focus {
  background: var(--color-gold-light);
}

/* ---- 上传区域 ---- */
.upload-zone {
  border: 2px dashed var(--color-gold);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  background: var(--color-paper);
  position: relative;
}

.upload-zone:hover {
  border-color: var(--color-red);
  background: rgba(196, 26, 26, 0.03);
}

.upload-zone--dragover {
  border-color: var(--color-red);
  background: rgba(196, 26, 26, 0.06);
  transform: scale(1.01);
}

.upload-zone__icon {
  font-size: 2.5rem;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
  opacity: 0.6;
}

.upload-zone__text {
  font-size: 0.95rem;
  color: var(--color-ink);
  margin-bottom: var(--space-xs);
}

.upload-zone__hint {
  font-size: 0.8rem;
  color: var(--color-gray-dark);
}

.upload-zone__preview {
  margin-top: var(--space-md);
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.upload-zone__preview-image {
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-md);
}

.upload-zone__preview-remove {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(196, 26, 26, 0.9);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.upload-zone__preview-remove:hover {
  background: var(--color-red-dark);
  transform: scale(1.1);
}

/* ---- 作品选择器 ---- */
.work-selector {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.work-selector__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.work-selector__item {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-gray);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--color-cream);
  position: relative;
}

.work-selector__item:hover {
  border-color: var(--color-gold);
  transform: scale(1.05);
}

.work-selector__item--selected {
  border-color: var(--color-red);
  box-shadow: 0 0 0 2px var(--color-red);
}

.work-selector__item-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.work-selector__delete-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.5);
  color: #fff;
  font-size: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-fast), background var(--transition-fast);
  z-index: 2;
}

.work-selector__item:hover .work-selector__delete-btn {
  opacity: 1;
}

.work-selector__delete-btn:hover {
  background: var(--color-red);
}

/* ---- 保存按钮区 ---- */
.control-panel__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.control-panel__save-btn {
  width: 100%;
  padding: 14px;
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.control-panel__save-btn--primary {
  background: var(--color-red);
  color: var(--color-white);
  border: 2px solid var(--color-gold);
}

.control-panel__save-btn--primary:hover {
  background: var(--color-red-dark);
  box-shadow: var(--shadow-gold);
  transform: translateY(-2px);
}

.control-panel__save-btn--primary:active {
  transform: translateY(0);
}

.control-panel__save-btn--secondary {
  background: var(--color-cream);
  color: var(--color-ink);
  border: 1.5px solid var(--color-gray);
}

.control-panel__save-btn--secondary:hover {
  border-color: var(--color-gold);
  background: var(--color-paper);
}

/* ---- 响应式适配 ---- */
@media (max-width: 1024px) {
  .control-panel {
    width: 260px;
  }
}

@media (max-width: 768px) {
  .preview-page__container {
    padding: var(--space-xl) var(--space-md);
  }

  .preview-page__title {
    font-size: 1.5rem;
  }

  .preview-page__body {
    flex-direction: column;
  }

  .control-panel {
    width: 100%;
  }

  .transfer-editor {
    min-height: 350px;
  }

  .transfer-editor__canvas-wrapper {
    min-height: 350px;
  }

  .transfer-editor__empty {
    min-height: 350px;
  }

  .work-selector__grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .control-panel__save-btn {
    flex: 1;
    padding: 12px;
    font-size: 0.95rem;
  }

  .transfer-editor__ai-btn {
    padding: 12px 20px;
    font-size: 0.95rem;
  }

  .slider-group__track::-webkit-slider-thumb {
    width: 22px;
    height: 22px;
  }

  .slider-group__track::-moz-range-thumb {
    width: 22px;
    height: 22px;
  }

  .slider-group__name {
    font-size: 0.9rem;
  }

  .slider-group__value {
    font-size: 0.85rem;
  }

  .work-selector__delete-btn {
    width: 26px;
    height: 26px;
    font-size: 11px;
  }

  .control-panel__section-title {
    font-size: 1.05rem;
  }

  .upload-zone__text {
    font-size: 1rem;
  }

  .upload-zone__hint {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .work-selector__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .upload-zone {
    padding: var(--space-lg) var(--space-md);
  }
}