.pascal-grid {
            background: #fef9e6;
            border-radius: 16px;
            padding: 1rem;
            margin: 1.5rem 0;
            overflow-x: auto;
            font-family: monospace;
            text-align: center;
        }
        .pascal-row {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 6px;
        }
        .pascal-cell {
            background: white;
            border-radius: 28px;
            padding: 5px 12px;
            margin: 3px;
            font-weight: 500;
            color: #1e466e;
            box-shadow: 0 1px 2px rgba(0,0,0,0.05);
            min-width: 55px;
            text-align: center;
            font-size: 0.85rem;
        }
        .pascal-title {
            font-weight: 600;
            margin-top: 1rem;
            margin-bottom: 0.5rem;
            color: #2c3e50;
        }
        .binomial-badge {
            background: #eef2f9;
            padding: 8px 16px;
            border-radius: 60px;
            font-family: monospace;
        }
        .input-group-custom {
            margin-bottom: 1.2rem;
        }
        .tool-header h1 {
            font-size: 2.3rem;
        }
        @media (max-width: 768px) {
            .pascal-cell { min-width: 40px; padding: 3px 8px; font-size: 0.75rem; }
        }