/* ========================================================
   Renaissance - Responsive Media Queries & Mobile Adaptation
   ======================================================== */

.menu-toggle-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    border: 1px solid var(--slate-200);
    background: #ffffff;
    font-size: 1.25rem;
    color: var(--slate-700);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
    line-height: 1;
}

.menu-toggle-btn:hover {
    background-color: var(--slate-100);
    color: var(--slate-900);
    border-color: var(--slate-300);
}

/* Tablet & Mobile Screens (<= 992px) */
@media (max-width: 992px) {
    .menu-toggle-btn {
        display: inline-flex;
    }

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

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        height: 100dvh;
        transform: translateX(-100%);
        z-index: 1001;
        box-shadow: none;
        transition: transform var(--transition-slow);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 12px 0 35px rgba(0, 0, 0, 0.45);
    }

    .content-container, .content-area {
        padding: 1.25rem 1rem;
    }

    .active-session-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

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

    .tab-header-actions {
        width: 100%;
        justify-content: flex-start;
    }
}

/* Mobile Screens (<= 640px) */
@media (max-width: 640px) {
    .stats-grid, .admin-overview-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        padding: 0 1rem;
        height: 60px;
    }

    .page-title h2 {
        font-size: 1.05rem;
    }

    .admin-breadcrumb {
        font-size: 0.78rem;
    }

    .admin-breadcrumb .breadcrumb-item:first-child,
    .admin-breadcrumb .breadcrumb-separator {
        display: none;
    }

    .connectivity-pill {
        display: none;
    }

    .topbar-actions {
        gap: 0.5rem;
    }

    .topbar-actions .btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.78rem;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        padding: 1rem 1.25rem;
    }

    .card-body {
        padding: 1.25rem 1rem;
    }

    .modal-backdrop, .modal-overlay {
        padding: 0.75rem;
    }

    .modal-container, .modal-dialog {
        max-height: 95vh;
    }

    .filter-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-toolbar > * {
        width: 100% !important;
    }

    .modal-footer {
        flex-direction: column-reverse;
    }

    .modal-footer .btn {
        width: 100%;
    }
}