.image-preview-area {
            background: #f8f9fa;
            border-radius: 1rem;
            padding: 1rem;
            text-align: center;
            min-height: 280px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
            border: 2px dashed transparent;
        }
        .image-preview-area.drag-over {
            border-color: var(--primary-color, #0d6efd);
            background-color: #e7f1ff;
            box-shadow: 0 0 0 3px rgba(13,110,253,0.25);
        }
        .preview-img {
            max-width: 100%;
            max-height: 280px;
            object-fit: contain;
            border: 1px solid #dee2e6;
            border-radius: 0.5rem;
            background: #fff;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        .drop-hint {
            font-size: 0.75rem;
            color: #6c757d;
            margin-top: 0.5rem;
            display: inline-block;
        }
        .result-canvas-container {
            background: #f8f9fa;
            border-radius: 1rem;
            padding: 1rem;
            text-align: center;
            min-height: 280px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        #roundedCanvas {
            max-width: 100%;
            max-height: 280px;
            width: auto;
            height: auto;
            background: repeating-conic-gradient(#ccc 0% 25%, #eee 0% 50%) 50% / 20px 20px;
            border-radius: 0.5rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .radius-slider {
            width: 100%;
        }
        .info-badge {
            font-size: 0.8rem;
            background-color: #e9ecef;
            padding: 0.2rem 0.6rem;
            border-radius: 20px;
            display: inline-block;
        }
        .metric-value {
            font-weight: 700;
            color: var(--primary-color);
        }
        .legend-color.square { background-color: #6c757d; width:16px; height:16px; display: inline-block; border-radius: 2px; }
        .legend-color.rounded { background-color: #0d6efd; border-radius: 50%; width:16px; height:16px; }
        .comparison-table td, .comparison-table th { vertical-align: middle; }
        .method-badge { font-family: monospace; background: #2c3e50; color: white; padding: 0.2rem 0.5rem; border-radius: 6px; }
        .faq-item { margin-bottom: 1rem; }