/* ===== Large screens (max-width: 1200px) ===== */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== Small tablets (max-width: 900px) ===== */
@media (max-width: 900px) {
    .main-content {
        padding: 1.5rem;
    }

    .page-header h1 {
        font-size: 1.75rem;
    }
}

/* ===== Tablet & Mobile (max-width: 768px) ===== */
@media (max-width: 768px) {
    /* Prevent horizontal overflow on main containers */
    .admin-layout {
        overflow-x: hidden;
        width: 100%;
    }

    /* Mobile header visible */
    .mobile-header {
        display: flex !important;
    }

    /* Sidebar off-screen */
    .sidebar {
        transform: translateX(-100%);
        position: fixed;
        z-index: 100;
        transition: transform 0.3s ease;
        width: 280px;
        max-width: 85vw;
    }

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

    /* Sidebar nav items smaller on mobile */
    .sidebar-nav {
        padding: 0.5rem;
    }

    .nav-item {
        padding: 0.65rem 0.85rem;
        font-size: 0.85rem;
        gap: 0.65rem;
    }

    .nav-icon {
        font-size: 1.1rem;
        min-width: 20px;
    }

    .nav-label {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .sidebar-header {
        padding: 1rem;
        font-size: 1rem;
    }

    .sidebar-footer {
        padding: 0.75rem;
        font-size: 0.8rem;
    }

    /* Sidebar overlay when open */
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .sidebar-overlay.open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    /* Main content full width */
    .main-content {
        margin-left: 0;
        padding: 0.75rem;
        padding-top: calc(var(--header-height) + 0.75rem);
        width: 100%;
    }

    /* Mobile header with hamburger */
    .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-height);
        padding: 0 1rem;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border);
        z-index: 90;
    }

    .mobile-header .hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: transparent;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        color: var(--text-primary);
        cursor: pointer;
        font-size: 1.25rem;
    }

    .mobile-header .hamburger:hover {
        border-color: var(--border-hover);
    }

    /* Stats single column */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .stat-card {
        padding: 1rem;
    }

    /* Cards smaller padding */
    .card {
        padding: 1rem;
        width: 100%;
    }

    /* Page header responsive */
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        padding: 1rem 0;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    /* Table horizontal scroll */
    .table-wrapper,
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        max-width: calc(100vw - 1.5rem);
        margin: 0;
    }

    .data-table {
        width: max-content;
        font-size: 0.75rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.35rem 0.4rem;
        font-size: 0.75rem;
        white-space: nowrap;
    }

    /* Modal nearly full width */
    .modal {
        max-width: 95%;
        max-height: 90vh;
        padding: 1.25rem;
        overflow-y: auto;
    }

    .modal-header h2 {
        font-size: 1.25rem;
    }

    /* Form responsive */
    .form-row {
        flex-direction: column;
        gap: 0.75rem;
    }

    .form-group {
        margin-bottom: 0.75rem;
    }

    /* Buttons full width on mobile */
    .btn-group {
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
    }

    .btn-group .btn {
        width: 100%;
    }

    /* Toast full width on mobile */
    .toast {
        left: 0.75rem;
        right: 0.75rem;
        max-width: none;
        min-width: auto;
    }

    /* Filters stack */
    .filters {
        flex-direction: column;
        gap: 0.5rem;
    }

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

    /* Action buttons smaller */
    .actions {
        gap: 0.5rem;
    }

    .btn-sm {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
    }
}

/* Hide mobile header on desktop */
.mobile-header {
    display: none;
}