img, video, iframe { max-width: 100%; }

@media (max-width: 768px) {
    .container, .form-container, .main-wrapper { width: 100%; max-width: 100%; }
    .form-grid, .grid, .row { grid-template-columns: 1fr; }
    input, select, textarea, button { max-width: 100%; }
    table { display: block; overflow-x: auto; }
}