/* Tablet responsiveness */
@media (max-width: 1024px) {
    .chart-container {
        height: 250px;
    }
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .stats-grid,
    .charts-grid {
        grid-template-columns: 1fr;
    }

    .controls-grid {
        grid-template-columns: 1fr;
    }

    .chart-container {
        height: 200px;
    }

    .chart-card {
        padding: 15px;
        margin-bottom: 20px;
    }

    .chart-card h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }

    h1 {
        font-size: 2rem;
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .chart-container {
        height: 180px;
    }

    .chart-card {
        padding: 12px;
        margin-bottom: 15px;
    }

    .chart-card h3 {
        font-size: 1rem;
        margin-bottom: 10px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .container {
        padding: 8px;
    }
}