/* Responsive Design */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
    
    .dashboard {
        grid-template-columns: 200px 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.active {
        transform: translateX(0);
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .navbar {
        flex-wrap: wrap;
    }
    
    .nav-links {
        order: 3;
        width: 100%;
        margin-top: 1rem;
        display: none;
    }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    #sidebar {
        position: static;
        width: 100%;
        height: auto;
    }

    .dashboard-main {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .auth-card {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .role-selector {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
    }
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-800);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .navbar,
    .btn {
        display: none;
    }
    
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}