css style a checkbox
/*this creates a circle checkbox with another smaller circle
inside when checked, it looks nice ...*/
input[type='checkbox'] {
    -webkit-appearance:none;
    display:inline-block;
    width:16px;
    height:16px;
    padding:0px;
    margin:0px;
    margin-right:5px;
    background:white;
    border-radius:20px;
    border:1px solid #ddd;
    border: 1px solid #dee2e6;                                                
    box-sizing:content-box;                                                   
    line-height:16px;                                                         
    vertical-align: sub;                                                      
    position:relative;
}                                                                             
input[type='checkbox']:checked {                                     
    border:1px solid  #55468c;                                                
}                                                                             
input[type='checkbox']:checked:after{                                
  content:'';                                                                 
  position: absolute;                                                         
  width: 12px;                                                                
  height: 12px;                                                               
  border-radius: 12px;                                                         
  background: #55468c;                                                        
  top:50%;                                                                    
  transform: translateY(-50%);                                                
  margin-left: auto;
  margin-right: auto;
  left: 0;
  right: 0;
}