.custom_block_btn,
.acf-block-preview .custom_block_btn{
    color : #ffffff !important;
    background-color : #dd3b3b;
    border: 5px solid #dd3b3b;
    border-radius : 0px;
}
.custom_block_btn:hover{
    color :  !important;
    background-color : #8c8c8c;
    border-color: #8c8c8c;
}

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

}