@media (max-width: 768px) {
    #app {
        padding-bottom: 2rem;
    }

    .app-title {
        font-size: 1rem;
    }

    .card {
        padding: 1rem;
    }

    .stats-summary, .summary-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .navigation-buttons {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: white;
        padding: 1rem;
        box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
        z-index: 90;
    }
    
    .app-content {
        padding-bottom: 80px; /* Space for fixed nav */
    }

    .option-item {
        padding: 0.75rem;
    }
}

@media (min-width: 1024px) {
    .stats-summary, .summary-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}