/* DPI Preset Buttons */
    .dpi-presets {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .dpi-preset-btn {
      padding: 10px 18px;
      background: var(--color-bg);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      cursor: pointer;
      text-align: center;
      font-family: var(--font-body);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--color-text);
      transition: all var(--transition-fast);
      line-height: 1.3;
    }
    .dpi-preset-btn:hover {
      border-color: var(--color-primary-subtle);
      background: var(--color-primary-light);
    }
    .dpi-preset-btn.active {
      border-color: var(--color-primary);
      background: var(--color-primary-light);
      color: var(--color-primary);
    }
    .dpi-preset-btn .preset-label {
      display: block;
      font-size: 0.7rem;
      font-weight: 500;
      color: var(--color-text-muted);
      margin-top: 2px;
    }
    .dpi-preset-btn.active .preset-label {
      color: var(--color-primary);
      opacity: 0.8;
    }

    /* Custom DPI Input */
    .custom-dpi-row {
      display: none;
      align-items: center;
      gap: 8px;
      margin-top: 8px;
    }
    .custom-dpi-row.visible {
      display: flex;
    }
    .custom-dpi-row input {
      width: 100px;
      text-align: center;
    }
    .custom-dpi-row span {
      font-size: 0.85rem;
      color: var(--color-text-secondary);
    }

    /* Resize Toggle */
    .toggle-row {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: 4px;
    }
    .toggle-switch {
      position: relative;
      width: 44px;
      height: 24px;
      flex-shrink: 0;
    }
    .toggle-switch input {
      opacity: 0;
      width: 0;
      height: 0;
    }
    .toggle-track {
      position: absolute;
      inset: 0;
      background: var(--color-border);
      border-radius: 12px;
      cursor: pointer;
      transition: background var(--transition-fast);
    }
    .toggle-track::after {
      content: '';
      position: absolute;
      top: 3px;
      left: 3px;
      width: 18px;
      height: 18px;
      background: white;
      border-radius: 50%;
      box-shadow: 0 1px 3px rgba(0,0,0,0.15);
      transition: transform var(--transition-fast);
    }
    .toggle-switch input:checked + .toggle-track {
      background: var(--color-primary);
    }
    .toggle-switch input:checked + .toggle-track::after {
      transform: translateX(20px);
    }
    .toggle-label {
      font-size: 0.85rem;
      color: var(--color-text-secondary);
      line-height: 1.4;
    }
    .toggle-label strong {
      color: var(--color-text);
    }

    /* DPI Info Cards */
    .dpi-info-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 20px;
    }
    .dpi-info-card {
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-border-light);
      background: var(--color-bg);
    }
    .dpi-info-card.card-before {
      border-left: 3px solid var(--color-text-muted);
    }
    .dpi-info-card.card-after {
      border-left: 3px solid var(--color-primary);
    }
    .dpi-info-card h4 {
      font-size: 0.75rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--color-text-muted);
      margin-bottom: 10px;
    }
    .dpi-info-card.card-after h4 {
      color: var(--color-primary);
    }
    .dpi-info-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 4px 0;
    }
    .dpi-info-row + .dpi-info-row {
      border-top: 1px solid var(--color-border-light);
    }
    .dpi-info-label {
      font-size: 0.8rem;
      color: var(--color-text-secondary);
    }
    .dpi-info-value {
      font-family: var(--font-mono);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--color-text);
    }

    /* Single preview for DPI tool */
    .preview-single {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 24px;
    }
    .preview-single .preview-box-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px 14px;
      background: var(--color-bg);
      border-bottom: 1px solid var(--color-border-light);
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--color-text-secondary);
    }
    .preview-single .preview-box-header .file-size {
      font-family: var(--font-mono);
      font-weight: 500;
    }
    .preview-single img {
      width: 100%;
      max-height: 400px;
      object-fit: contain;
      background: repeating-conic-gradient(#f1f5f9 0% 25%, transparent 0% 50%) 50% / 16px 16px;
      padding: 8px;
    }

    @media (max-width: 768px) {
      .dpi-info-grid {
        grid-template-columns: 1fr;
      }
      .dpi-presets {
        flex-direction: column;
      }
      .dpi-preset-btn {
        width: 100%;
      }
    }