h1{text-align:center}.upload-btn-wrapper{position:relative;overflow:hidden;display:inline-block}.btn{border:2px solid gray;color:gray;background-color:#fff;padding:8px 20px;border-radius:8px;font-size:20px;font-weight:700}.upload-btn-wrapper input[type=file]{font-size:100px;position:absolute;left:0;top:0;opacity:0}