.wtwis-form-row-wide input[type=radio] {
     appearance: none;
     background-color: #fff;
     width: 15px;
     height: 15px;
     border: 2px solid #ccc;
     border-radius: 2px;
     display: inline-grid;
     place-content: center;
 }

.wtwis-form-row-wide input[type=radio]::before {
     content: "";
     width: 10px;
     height: 10px;
     transform: scale(0);
     transform-origin: bottom left;
     background-color: #fff;
     clip-path: polygon(13% 50%, 34% 66%, 81% 2%, 100% 18%, 39% 100%, 0 71%);
 }

.wtwis-form-row-wide input[type=radio]:checked::before {
     transform: scale(1);
 }

.wtwis-form-row-wide input[type=radio]:checked {
     background-color: #0075FF;
     border: 2px solid #0075FF;
 }

.wtwis-checkout-options .wtwis-form-row-wide input[name="wtwis_installation_options"] {
    max-width: 5% !important;
    float: left !important;
    width: 15px !important;
    margin: 15px 5px 0 0 !important;
    border-width: 1px !important;
    border-color: #221B19 !important;
}

.wtwis-checkout-options .wtwis-form-row-wide input[name="wtwis_installation_options"] + label {
    width: calc(96% - 10px) !important;
    float: left !important;
    clear: none !important;
    display: inline !important;
    line-height: inherit !important;
    color: #221B19 !important;
    margin-top: 10px !important;
}

#wtwis_installation_options_field span.woocommerce-input-wrapper {
    display: inline-block;
}