/* Responsive Design */

/* Tablet (768px and below) */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
    }
    
    .view-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .header-actions {
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-icon {
        font-size: 2rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .plans-grid {
        grid-template-columns: 1fr;
    }
    
    .classes-grid {
        grid-template-columns: 1fr;
    }
    
    .trainers-grid {
        grid-template-columns: 1fr;
    }
    
    .table-controls {
        flex-direction: column;
    }
    
    .table-controls .form-control {
        max-width: 100%;
    }
    
    .data-table {
        font-size: 0.875rem;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .modal {
        padding: var(--spacing-sm);
    }
    
    .modal-content {
        padding: var(--spacing-md);
    }
    
    .member-profile {
        grid-template-columns: 1fr;
    }
    
    .profile-photo {
        width: 150px;
        height: 150px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
    .login-header h1 {
        font-size: 2rem;
    }
    
    .view-header h2 {
        font-size: 1.5rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .plan-card {
        padding: var(--spacing-lg);
    }
    
    .class-card {
        padding: var(--spacing-lg);
    }
    
    .trainer-card {
        padding: var(--spacing-lg);
    }
    
    .trainer-avatar {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer .btn {
        width: 100%;
    }
    
    .notification {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 101;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-content {
        padding-top: 80px;
    }
}

/* Hide scrollbar on mobile for better UX */
@media (max-width: 768px) {
    .sidebar::-webkit-scrollbar {
        width: 0;
    }
}

/* Landscape orientation fixes */
@media (max-height: 600px) and (orientation: landscape) {
    .sidebar {
        padding: var(--spacing-md);
    }
    
    .user-avatar {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .nav-item {
        padding: var(--spacing-sm);
    }
}