.result-value-large {
            font-size: 2.2rem;
            font-weight: 700;
            color: #1e466e;
            font-family: 'Courier New', monospace;
        }
        .charge-table th, .charge-table td {
            vertical-align: middle;
            text-align: center;
        }
        .contrib-list {
            max-height: 240px;
            overflow-y: auto;
            background: #f9f9ff;
            border-radius: 12px;
            padding: 0.5rem;
        }
        .contrib-item {
            font-family: monospace;
            font-size: 0.85rem;
            border-bottom: 1px solid #e2e8f0;
            padding: 0.4rem 0.2rem;
        }
        .canvas-container {
            background: #fefefe;
            border-radius: 20px;
            border: 1px solid #dee2e6;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            margin-top: 1rem;
        }
        canvas {
            width: 100%;
            height: auto;
            background: #ffffff;
            border-radius: 16px;
            display: block;
        }
        .legend {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            justify-content: center;
            margin-top: 0.5rem;
            font-size: 0.8rem;
        }
        .k-constant {
            background: #eef2ff;
            padding: 0.5rem 1rem;
            border-radius: 2rem;
            font-family: monospace;
            font-weight: 600;
        }
        .example-badge {
            background: #eef2ff;
            border: none;
            transition: all 0.2s;
        }
        .example-badge:hover {
            background: #d9e6ff;
            transform: translateY(-2px);
        }
        .btn-outline-accent {
            border: 1px solid #1e466e;
            color: #1e466e;
        }
        .btn-outline-accent:hover {
            background: #1e466e;
            color: white;
        }
        .warning-custom {
            background: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 0.75rem;
            border-radius: 10px;
            margin: 0.5rem 0;
        }
        footer {
            margin-top: 3rem;
        }
        .charge-symbol {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        .pos-charge { background: #e74c3c; color: white; }
        .neg-charge { background: #3498db; color: white; }