/* ===== MOBILE RESPONSIVE — max-width: 768px ===== */

@media (max-width: 768px) {

    /* ---- Body & App Layout ---- */
    body { overflow: auto; height: auto; }
    #app { flex-direction: column; height: auto; min-height: 100vh; }

    /* ---- Sidebar → Bottom Nav ---- */
    .sidebar {
        position: fixed;
        bottom: 0;
        left: 0;
        top: auto;
        width: 100% !important;
        height: auto;
        flex-direction: row;
        border-right: none;
        border-top: 1px solid var(--border);
        z-index: 1000;
        background: var(--bg-secondary);
        box-shadow: 0 -2px 12px rgba(0,0,0,0.08);
    }

    .sidebar-logo { display: none; }
    .sidebar-footer { display: none; }

    .sidebar-nav {
        flex-direction: row;
        padding: 0;
        gap: 0;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        width: 100%;
        justify-content: space-around;
    }
    .sidebar-nav::-webkit-scrollbar { display: none; }

    .nav-item {
        flex-direction: column;
        gap: 2px;
        padding: 8px 6px 6px;
        font-size: 0.65rem;
        min-width: 52px;
        text-align: center;
        justify-content: center;
        align-items: center;
        border-radius: 0;
        flex-shrink: 0;
    }
    .nav-item::before { display: none; }
    .nav-item svg { width: 20px; height: 20px; }
    .nav-item span { display: block !important; font-size: 0.6rem; white-space: nowrap; }

    .nav-item.active {
        background: rgba(8,145,178,0.1);
        border-top: 2px solid var(--primary);
    }

    /* ---- Main Content ---- */
    .main-content {
        margin-left: 0 !important;
        padding: 16px 14px 80px; /* bottom padding for nav bar */
        height: auto;
        min-height: 100vh;
    }

    /* ---- Page Headers ---- */
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 16px;
    }
    .page-title { font-size: 1.35rem; }
    .page-subtitle { font-size: 0.8rem; }

    /* ---- Dashboard Stats ---- */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px;
    }
    .stat-card { padding: 14px; }
    .stat-value { font-size: 1.5rem; }
    .stat-label { font-size: 0.7rem; }
    .stat-icon { width: 32px; height: 32px; }
    .stat-icon svg { width: 16px; height: 16px; }

    .dashboard-grid {
        grid-template-columns: 1fr !important;
        gap: 14px;
    }
    .chart-container { height: 200px; }
    .chart-card, .widget-card { padding: 16px; }

    /* ---- Cards ---- */
    .card { padding: 14px; }

    /* ---- Tables ---- */
    .table-container { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    thead th { padding: 8px 10px; font-size: 0.7rem; white-space: nowrap; }
    tbody td { padding: 10px; font-size: 0.82rem; }

    /* ---- Search Box ---- */
    .search-box { width: 100%; }

    /* ---- Form ---- */
    .form-row { grid-template-columns: 1fr !important; }
    .form-input, .form-select, .form-textarea { font-size: 16px; } /* prevents iOS zoom */

    /* ---- Buttons ---- */
    .btn { padding: 8px 14px; font-size: 0.82rem; }
    .btn-sm { padding: 6px 10px; font-size: 0.75rem; }

    /* ---- Surgery Schedule ---- */
    .surgery-week-grid {
        grid-template-columns: 1fr !important;
        gap: 10px;
    }
    .surgery-day-card { margin-bottom: 4px; }
    .surgery-controls { flex-direction: column; gap: 8px; }
    .surgery-summary-panel { margin-top: 16px; }

    /* ---- Schedule (Phân công tuần) ---- */
    .schedule-table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .schedule-table { min-width: 700px; }

    /* ---- Staff Grid ---- */
    .staff-grid {
        grid-template-columns: 1fr !important;
    }

    /* ---- Patient Stats ---- */
    .patient-stats {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px;
    }

    /* ---- Room Map ---- */
    .room-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px;
    }

    /* ---- Plans ---- */
    .plans-grid {
        grid-template-columns: 1fr !important;
    }

    /* ---- Tasks Kanban ---- */
    .kanban-board {
        grid-template-columns: 1fr !important;
    }

    /* ---- Modal ---- */
    .modal-content {
        width: 95% !important;
        max-width: none !important;
        margin: 10px;
        max-height: 90vh;
    }

    /* ---- Login ---- */
    .login-card {
        width: 95% !important;
        max-width: none !important;
        padding: 24px 20px;
    }

    /* ---- Surgery Stats ---- */
    .surgery-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    .surgery-stats-charts {
        grid-template-columns: 1fr !important;
    }

    /* ---- Calendar Nav ---- */
    .calendar-nav {
        flex-wrap: wrap;
        gap: 6px;
    }
    .calendar-month-label { font-size: 0.85rem; }

    /* ---- Patient Filter Buttons ---- */
    .patient-room-filters {
        flex-wrap: wrap;
        gap: 6px;
    }
    .patient-room-filters .btn { font-size: 0.72rem; padding: 4px 8px; }

    /* ---- Hide non-essential on mobile ---- */
    .stat-change { display: none; }
}

/* ===== SMALL PHONES — max-width: 480px ===== */
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr !important; }
    .patient-stats { grid-template-columns: 1fr !important; }
    .room-grid { grid-template-columns: 1fr !important; }
    .surgery-stats-grid { grid-template-columns: 1fr !important; }
    .main-content { padding: 12px 10px 80px; }
    .nav-item { min-width: 44px; padding: 6px 4px; }
    .nav-item span { font-size: 0.55rem; }
}