@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .stat-card-wide {
        grid-column: span 3;
    }
}

@media (max-width: 980px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: min(82vw, 320px);
        z-index: 20;
        transform: translateX(-104%);
        transition: transform 0.22s ease;
    }

    .sidebar.is-open {
        transform: translateX(0);
    }

    .sidebar-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 19;
        border: 0;
        padding: 0;
        background: rgba(18, 32, 51, 0.32);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
    }

    .sidebar-backdrop.is-visible {
        opacity: 1;
        pointer-events: auto;
    }

    .mobile-nav-button {
        display: inline-flex;
    }

    .topbar {
        margin-left: 20px;
        margin-right: 20px;
    }

    .page-content {
        padding-left: 20px;
        padding-right: 20px;
    }

    .auth-layout,
    .two-column-grid,
    .detail-grid,
    .form-grid,
    .filter-grid,
    .stats-grid,
    .detail-list {
        grid-template-columns: 1fr;
    }

    .stat-card-wide {
        grid-column: auto;
    }

    .timeline-item header,
    .section-header,
    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .auth-body {
        padding: 18px;
    }

    .auth-panel,
    .card,
    .hero-card,
    .stat-card {
        padding: 18px;
        border-radius: 20px;
    }

    .topbar {
        top: 10px;
        padding: 18px;
        border-radius: 20px;
    }

    .data-table {
        min-width: 560px;
    }

    .button-row,
    .toolbar-inline,
    .topbar-actions {
        width: 100%;
    }

    .btn,
    .ghost-button {
        width: 100%;
        justify-content: center;
    }

    .password-field {
        grid-template-columns: 1fr;
    }
}