/** solid boxes https://d.pr/i/qxfuJx - example uses Font Awesome WordPress plugin https://wordpress.org/plugins/font-awesome/ **/
.facetwp-type-checkboxes .facetwp-checkbox {
background: none;
padding-left: 0;
}
.facetwp-checkbox.checked {
background: none;
}
.facetwp-type-checkboxes .facetwp-checkbox::before {
display: inline-block;
width: 20px;
height: 25px;
content: "f0c8";
font-family: "Font Awesome 5 Free";
font-weight: 900;
}
.facetwp-type-checkboxes .facetwp-checkbox.checked::before {
content: "f14a";
}