.preview-area {
            background-color: #f8f9fc;
            border: 2px dashed #cbd5e1;
            border-radius: 16px;
            padding: 1.5rem;
            text-align: center;
            transition: all 0.2s;
            min-height: 240px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .preview-image {
            max-width: 100%;
            max-height: 320px;
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            background: repeating-conic-gradient(#f0f0f0 0% 25%, #ffffff 0% 50%) 50% / 20px 20px;
        }
        .info-badge {
            font-family: 'Courier New', monospace;
            background: #eef2ff;
            padding: 0.2rem 0.6rem;
            border-radius: 20px;
            font-size: 0.8rem;
        }
        .base64-input {
            font-family: 'Courier New', monospace;
            font-size: 0.85rem;
            background: #fefce8;
        }
        .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
        }
        .security-note {
            background-color: #ffeaea;
            border-left: 5px solid #dc3545;
            padding: 1rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        .performance-note {
            background-color: #f0f9ff;
            border-left: 5px solid #0ea5e9;
            padding: 1rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        .use-case-grid .card {
            height: 100%;
            border: none;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            transition: transform 0.2s;
        }
        .use-case-grid .card:hover {
            transform: translateY(-5px);
        }
        .code-example {
            font-family: 'Courier New', monospace;
            background-color: #1e293b;
            color: #e2e8f0;
            padding: 1rem;
            border-radius: 8px;
            overflow-x: auto;
            margin: 1rem 0;
        }
        .advanced-technical table {
            font-size: 0.9rem;
        }
        .advanced-technical th {
            background-color: #f8fafc;
        }
        .reference-section {
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
            border-radius: 12px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .accordion-item {
            border: 1px solid #dee2e6;
        }
        .accordion-button:not(.collapsed) {
            background-color: #e7f1ff;
            color: #0d6efd;
        }