.upload-btn-wrapper 
{
  position: relative;
  overflow: hidden;
  display: inline-block;
}

.upload-btn-wrapper input[type=file] 
{
  font-size: 100px;
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
}
.cfgen-form-container .btn-default {
    background: #81c784;
    border: 0;
    color: #fff;
    font-size: 16px;
    padding: 5px 20px;
}

@media only screen and (max-width: 768px){
	.form_block_sd {
		flex-direction: column;
	}
	.form_block_sd > div {
		width: 100%;
	}
}