.chart-card {
            flex: 1 1 45%; 
            min-width: 300px;
            padding: 20px;
            border-radius: 15px;
            box-sizing: border-box;
            background: rgba(255, 255, 255, 0.05); 
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 20px;
        }

        @media (max-width: 768px) {
            .chart-card {
                flex: 1 1 100%; 
                width: 100%;
                max-width: 100%;
            }
        }
        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr); 
            gap: 30px;
            width: 100%;
            margin-top: 30px;
        }

        .portfolio-item {
            width: 100%; 
            margin-bottom: 0; 
        }
        @media (max-width: 992px) {
            .portfolio-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 600px) {
            .portfolio-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }