@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        margin-top: 0;
    }

    .main-content {
        margin-left: 0;
        margin-top: 0;
        padding: 20px;
    }

    .header {
        position: relative;
    }

    .nav-menu {
        display: flex;
        flex-wrap: wrap;
        padding: 10px;
    }

    .nav-item {
        flex: 1 1 auto;
        min-width: 120px;
        justify-content: center;
        padding: 10px;
    }

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

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .page-actions {
        width: 100%;
        flex-direction: column;
        flex-wrap: wrap;
    }

    .page-actions input,
    .page-actions .btn {
        width: 100%;
    }

    .table-container {
        overflow-x: auto;
    }

    .data-table {
        min-width: 800px;
    }

    .report-filters {
        flex-direction: column;
        align-items: stretch;
    }
}