Add a Hover to Add Files

I want to add a hover to

<input type=”file” name=”ssfa_fileup_files_6304[]” id=”ssfa_fileup_files_6304″ class=”ssfa_hidden_browse” multiple=”multiple” data-uid=”6304″>

But it didn’t work. How can I do this?

I have tried

span.ssfa_add_files:hover,span[id^=”ssfa_submit_upload”]:hover {
background: #fff !important;
background-color: #fff !important;
color: #000 !important;
}