@media (max-width: 1100px) {
    .two-columns {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .sidebar {
        position: sticky;
        top: 0;
        height: auto;
        width: 100%;
        flex-direction: column;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 14px;
    }

    .app {
        flex-direction: column;
    }

    .content {
        margin-left: 0;
        padding: 18px;
    }

    .sidebar nav {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
    }

    .sidebar nav a {
        padding: 8px 10px;
        font-size: 13px;
    }

    .logo {
        margin-bottom: 12px;
    }

    .user-info {
        border-top: none;
        padding-top: 0;
        margin-top: 10px;
    }

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

    .chart-container {
        height: 260px;
    }

    .data-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}

@media (max-width: 560px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

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

    .filters input,
    .filters select {
        width: 100%;
        min-width: 0;
    }

    .modal-actions {
        flex-direction: column;
    }

    .modal-actions button {
        width: 100%;
    }
}