/* ===== Tab Bar ===== */
.tab-bar {
  display: flex;
  gap: 0;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 4px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.tab-btn {
  flex: 1;
  padding: 12px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--color-text);
  background: var(--color-bg);
}

.tab-btn.active {
  background: var(--color-primary);
  color: #fff;
}

/* ===== Upload Zone ===== */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 20px;
  text-align: center;
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-primary);
  background: #eff6ff;
}

.upload-zone-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  display: block;
}

.upload-zone-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.upload-zone-hint {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.upload-zone input[type="file"] {
  display: none;
}

/* ===== Options Panel ===== */
.options-panel {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-top: 16px;
  box-shadow: var(--shadow);
  display: none;
}

.options-panel.visible {
  display: block;
}

.options-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.options-row + .options-row {
  margin-top: 12px;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.option-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.option-group select,
.option-group input[type="range"] {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  background: #fff;
  color: var(--color-text);
  min-width: 160px;
}

.option-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.quality-value {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
}

.codec-hint {
  font-size: 0.72rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
  min-height: 1em;
}

.codec-hint .hw-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 1px 5px;
  border-radius: 3px;
  margin-left: 2px;
}

.codec-hint .hw-badge.supported {
  background: #dcfce7;
  color: #166534;
}

.codec-hint .hw-badge.unsupported {
  background: #fee2e2;
  color: #991b1b;
}

/* ===== Slow Format Warning ===== */
.gif-anim-info {
  margin-top: 12px;
  padding: 10px 14px;
  background: #eff6ff;
  border: 1px solid #3b82f6;
  border-radius: var(--radius);
  font-size: 0.82rem;
  color: #1e40af;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.5;
}

.slow-format-warning {
  margin-top: 12px;
  padding: 10px 14px;
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: var(--radius);
  font-size: 0.82rem;
  color: #92400e;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.slow-format-icon {
  flex-shrink: 0;
  font-size: 1rem;
}

/* ===== Convert Button ===== */
.convert-actions {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  display: none;
}

.convert-actions.visible {
  display: flex;
}

/* ===== File List ===== */
.file-list {
  margin-top: 16px;
}

.file-item {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 12px;
  align-items: center;
}

.file-item-thumb {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 4px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.file-item-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border-radius: 4px;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.file-item-info {
  flex: 1;
  min-width: 0;
}

.file-item-name {
  font-size: 0.875rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item-meta {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.file-item-preview {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px 8px;
  border-radius: var(--radius);
  transition: all var(--transition);
  flex-shrink: 0;
}

.file-item-preview:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.file-item-remove {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 4px;
  line-height: 1;
}

.file-item-remove:hover {
  color: var(--color-error);
}

/* ===== Preview Modal ===== */
.preview-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
}

.preview-modal-body {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-modal-close {
  position: absolute;
  top: -36px;
  right: -4px;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.preview-modal-close:hover {
  opacity: 1;
}

.preview-modal-media {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

img.preview-modal-media {
  object-fit: contain;
  background: #fff;
}

video.preview-modal-media {
  background: #000;
}

.preview-modal-audio {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 32px 40px;
  text-align: center;
  min-width: 320px;
  max-width: 480px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.preview-modal-audio-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.preview-modal-audio-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
  word-break: break-all;
}

/* ===== Progress ===== */
.progress-bar-container {
  width: 100%;
  margin-top: 8px;
}

.progress-bar {
  height: 6px;
  background: var(--color-bg);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-bar-fill.done {
  background: var(--color-success);
}

.progress-bar-fill.error {
  background: var(--color-error);
}

.progress-text {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* ===== Global Progress ===== */
.global-progress {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 16px;
  box-shadow: var(--shadow);
  display: none;
}

.global-progress.visible {
  display: block;
}

.global-progress-text {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
}

/* ===== FFmpeg Status ===== */
.ffmpeg-status {
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-top: 16px;
  font-size: 0.85rem;
  color: #92400e;
  display: none;
  align-items: center;
  gap: 8px;
}

.ffmpeg-status.visible {
  display: flex;
}

.ffmpeg-status .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #f59e0b;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== Results ===== */
.results-section {
  margin-top: 16px;
  display: none;
}

.results-section.visible {
  display: block;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.results-header h3 {
  font-size: 1rem;
}

.result-item {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.result-item-info {
  flex: 1;
  min-width: 0;
}

.result-item-name {
  font-size: 0.875rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.result-item-size {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.result-item-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.result-error {
  color: var(--color-error);
  font-size: 0.8rem;
  padding: 8px 12px;
  background: #fef2f2;
  border-radius: var(--radius);
  margin-bottom: 8px;
}

/* ===== Warning ===== */
.warning-banner {
  background: #fef3c7;
  border: 1px solid #fbbf24;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 0.8rem;
  color: #92400e;
  margin-top: 12px;
  display: none;
}

.warning-banner.visible {
  display: block;
}

/* ===== GIF Trim Section ===== */
.gif-trim-section {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.gif-trim-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.gif-trim-icon {
  font-size: 1rem;
}

.gif-trim-preview {
  position: relative;
  width: 100%;
  max-width: 480px;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 12px;
  aspect-ratio: 16 / 9;
}

.gif-trim-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.gif-trim-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: opacity var(--transition);
  pointer-events: all;
}

.gif-trim-play-btn:hover {
  background: rgba(0, 0, 0, 0.8);
}

.gif-trim-play-btn.hidden {
  opacity: 0;
  pointer-events: none;
}

.gif-trim-timeline {
  padding: 8px 0;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.gif-trim-track {
  position: relative;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
}

.gif-trim-range {
  position: absolute;
  top: 0;
  height: 100%;
  background: var(--color-primary);
  border-radius: 4px;
  opacity: 0.4;
}

.gif-trim-handle {
  position: absolute;
  top: 50%;
  width: 16px;
  height: 24px;
  background: var(--color-primary);
  border: 2px solid #fff;
  border-radius: 4px;
  transform: translate(-50%, -50%);
  cursor: ew-resize;
  box-shadow: var(--shadow);
  z-index: 2;
  transition: box-shadow var(--transition);
}

.gif-trim-handle:hover,
.gif-trim-handle.dragging {
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.gif-trim-times {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
  gap: 8px;
}

.gif-trim-time {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.gif-trim-time label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.gif-trim-time-input {
  width: 72px;
  padding: 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.8rem;
  text-align: center;
  background: var(--color-bg);
  color: var(--color-text);
}

.gif-trim-duration {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
}

.gif-trim-hint {
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* ===== Crop Modal ===== */
.crop-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.crop-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
}

.crop-modal-body {
  position: relative;
  z-index: 1;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-lg);
  animation: dropdownFadeIn 0.2s ease;
}

.crop-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.crop-modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.crop-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}

.crop-modal-close:hover {
  color: var(--color-text);
}

.crop-modal-canvas-wrapper {
  display: flex;
  justify-content: center;
  background: var(--color-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.crop-modal-canvas-wrapper canvas {
  display: block;
  max-width: 100%;
  cursor: crosshair;
}

.crop-modal-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

#crop-dimensions {
  font-weight: 600;
  color: var(--color-primary);
}

.crop-hint {
  font-size: 0.75rem;
}

.crop-modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  justify-content: flex-end;
}

.crop-status {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-success);
  margin-top: 2px;
  display: block;
}

/* ===== Drag Reorder ===== */
.file-item-drag-handle {
  width: 24px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  cursor: grab;
  flex-shrink: 0;
  user-select: none;
  -webkit-user-select: none;
}

.file-item-drag-handle:active {
  cursor: grabbing;
}

.file-item.dragging {
  opacity: 0.4;
  background: #eff6ff;
}

.file-item-reorder-btns {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.file-item-reorder-btns button {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  width: 24px;
  height: 20px;
  font-size: 0.6rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  padding: 0;
  transition: all var(--transition);
}

.file-item-reorder-btns button:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ===== Responsive adjustments ===== */
@media (max-width: 640px) {
  .tab-btn {
    padding: 10px 8px;
    font-size: 0.8rem;
  }

  .upload-zone {
    padding: 24px 16px;
  }

  .upload-zone-icon {
    font-size: 2rem;
  }

  .options-row {
    flex-direction: column;
    gap: 12px;
  }

  .option-group select {
    min-width: 100%;
  }

  .file-item {
    flex-wrap: wrap;
  }

  .result-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .gif-trim-preview {
    max-width: 100%;
  }

  .gif-trim-times {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .gif-trim-time {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}