.sequence-preview {
            font-family: 'Courier New', monospace;
            background: #f8f9fa;
            padding: 0.8rem;
            border-radius: 6px;
            border: 1px solid #dee2e6;
            letter-spacing: 0.5px;
            word-break: break-all;
        }
        .badge-gc {
            background-color: #28a745;
            color: white;
            font-size: 0.9rem;
        }
        .feature-icon {
            font-size: 1.4rem;
            margin-right: 0.5rem;
            color: var(--primary-color);
        }
        .result-panel {
            background-color: #fefefe;
            border-radius: 8px;
            padding: 1rem;
            margin-bottom: 1.5rem;
            border: 1px solid #e9ecef;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
        .copy-seq-btn {
            font-size: 0.8rem;
            padding: 0.2rem 0.6rem;
        }
        .auth-card {
            background: #f8f9fc;
            border-left: 5px solid #2c7da0;
        }
        .example-buttons .btn-sm {
            margin: 0.2rem;
        }
        .mono {
            font-family: 'Courier New', monospace;
        }
        .tool-header h1 {
            font-size: 2rem;
        }
        @media (max-width: 768px) {
            .sequence-preview { font-size: 0.85rem; }
        }
        .checkbox-auto {
            background-color: #f0f7ff;
            padding: 5px 12px;
            border-radius: 20px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }