Add div element for option sets to style

Eg:

yayextra-option-set[data-option-set-id="1439"] { /* Option set id is 1439 */
 border:solid 1px rgba(88,115,149,0.5);
 padding: 10px;
 margin-bottom: 50px;
}
.yayextra-option-set[data-option-set-id="1908"] { /* Option set id is 1908 */
 border:solid 1px rgba(88,115,149,0.5);
 padding: 10px;
}
/* You can style everything here, and you can style other option sets similarly based on id.
 Ex:
.yayextra-option-set[data-option-set-id="215"] {
 style here .....
 }
*/

You can see option set ID here: