Checkbox highlight not working when its checked

i have included some checkboxes within my html page so the user can check and uncheck them, i also wrote the style to highlight the checkbox borders and also the label but still nothing work.

can do with a bit of help.

 <input type="checkbox" name="createartwork" id="createartwork"> 
 <label class="label-for-check" for="createartwork">I want you  to create my artwork</label> 


input[type=checkbox]:checked  + label::after{

background-color: #FD6418;

}

input:checked {
height: 50px;
width: 50px;

}