.custom_block_btn,
.acf-block-preview .custom_block_btn{
    color : #003f89 !important;
    background-color : #dcf400;
    border: 5px solid #dcf400;
    border-radius : 3px;
}
.custom_block_btn:hover{
    color : #dcf400 !important;
    background-color : #003f89;
    border-color: #003f89;
}

@media only screen and (max-width: 500px){

}