main {
    max-width: 1200px;
    margin: 0 auto;
}
main iframe {
    width: 100%;
    height: 4705px;
}
main .form-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 640px;
    height: 78px;
    margin: 20px auto 0;
}
@media (max-width: 996px) {
    main .form-nav {
        padding: 0 15px 0 20px;
    }
}