button {
    display: none;
}

.variant {
    display: none;
}

select.variant-select:has([value="monthly"]:checked) ~ div#variant-monthly,
select.variant-select:has([value="pilot"]:checked) ~ div#variant-pilot,
select.variant-select:has([value="term"]:checked) ~ div#variant-term {
    display: block;
}

.csg {
    display: none;
}