Template:CharIcon-UMVC3/styles.css

.CharIcon-UMVC3 {
 
}

.CharIcon-UMVC3-Background {
 background: gray; 
 width:max-content; 
 border: solid 1px white;
}

.CharIcon-UMVC3:hover > .CharIcon-UMVC3-Background {
 border: solid 10px yellow;
}