JSFiddle - React, Tailwind, and code Playground

HTML

<form id="fileUploadForm" onsubmit="return uploadToTempFolder();" enctype="multipart/form-data">
    	<input type="file" name="file" id="file" accept="application/pdf">
    	<input type="submit" class="button-blue" value="Upload">
 </form>

CSS

input.button-blue{
			font-family: 'Montserrat', Arial, Helvetica, sans-serif;
			width: 20%;
			border: #fbfbfb solid 4px;
			cursor:pointer;
			background-color: #3498db;
			color:white;
			font-size:18px;
			transition: all 0.3s;
		  font-weight:700;
		}