.card-stat {
        border: none;
        border-radius: 15px;
        transition: transform 0.2s ease;
    }

    .card-stat:hover {
        transform: translateY(-5px);
    }

    .stat-icon {
        font-size: 3rem;
        opacity: 0.85;
    }

    .chart-container {
        position: relative;
        height: 300px;
    }