.regression-equation {
            font-size: 1.4rem;
            padding: 15px;
            background-color: rgba(40, 167, 69, 0.08);
            border-left: 4px solid #28a745;
            border-radius: 4px;
            margin: 15px 0;
            font-family: 'Courier New', monospace;
            text-align: center;
        }
        .stats-grid {
            background-color: #f8f9fc;
            border-radius: 12px;
            padding: 1rem;
            margin: 1rem 0;
            border: 1px solid #e2e8f0;
        }
        .r2-value {
            font-size: 2.5rem;
            font-weight: 700;
            color: #198754;
        }
        .data-preview {
            background: #f1f3f5;
            border-radius: 6px;
            padding: 10px;
            font-size: 0.85rem;
            max-height: 180px;
            overflow-y: auto;
            font-family: monospace;
        }
        .example-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .correlation-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 500;
        }
        .correlation-strong { background: #d1e7dd; color: #0a3622; }
        .correlation-moderate { background: #fff3cd; color: #856404; }
        .correlation-weak { background: #f8d7da; color: #842029; }
        .canvas-container {
            text-align: center;
            margin-top: 1.5rem;
            background: #ffffff;
            border-radius: 12px;
            padding: 0.5rem;
            box-shadow: 0 1px 2px rgba(0,0,0,0.05);
        }
        .reg-canvas {
            width: 100%;
            height: auto;
            background-color: #fefefe;
            border: 1px solid #dee2e6;
            border-radius: 8px;
            display: block;
            margin: 0 auto;
        }
        .legend-reg {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-top: 0.5rem;
            font-size: 0.85rem;
        }
        .legend-dot { width: 14px; height: 14px; border-radius: 50%; display: inline-block; margin-right: 5px; }
        .legend-dot.data { background-color: #0d6efd; }
        .legend-dot.line { background-color: #dc3545; width: 20px; height: 3px; border-radius: 2px; vertical-align: middle; }
        .insight-card {
            background: #e9f0f9;
            border-radius: 12px;
            padding: 1rem;
            margin: 1rem 0;
        }