:root {
            --light-gray: #f4f7fc;
            --border-color: #e2e8f0;
            --text-muted: #5c6f87;
        }
        .math-box, .insight-box {
            background: #f1f6fe;
            border-left: 4px solid var(--primary-color);
            padding: 1.2rem;
            border-radius: 0 16px 16px 0;
            margin: 1.5rem 0;
        }
        .canvas-pair {
            display: flex;
            flex-wrap: wrap;
            gap: 1.8rem;
            justify-content: center;
            margin: 1.5rem 0;
        }
        .canvas-card {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.08);
            padding: 1rem;
            text-align: center;
            flex: 1;
            min-width: 250px;
        }
        .canvas-card canvas {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            background: #1e1e2a;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .legend {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-top: 1rem;
            font-size: 0.85rem;
        }
        footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2rem 0 1rem;
            margin-top: 2rem;
        }
        footer a {
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            }