.price-tier-block .tilt-button-wrap {
    width 100% !important;
}
.price-tier-block a.nectar-button.large {
    width: 100% !important;
    border-top-left-radius: 2em !important;
    border-top-right-radius: 2em !important;
    border-bottom-right-radius: 2em !important;
    border-bottom-left-radius: 2em !important;
}