.multibutton .heading-center {
    justify-content: center;
}
.multibutton .button {
    width: 98%;
}

@media(min-width: 990px) {
    .multibutton-list {
        justify-content: center;
    }
    .multibutton-list__item.grid__item {
        width: unset;
        flex-grow: 0;
    }
    .multibutton .button {
        width: auto;
    }
}