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

.btn {
  border: 2px solid #ede9ef;
  color: gray;
  background-color: white;
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 20px;
  font-weight: bold;
}

.upload-btn-wrapper input[type=file] {
  font-size: 100px;
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
}

.button {
  background-color: #d23b7d;
  border: none;
  border-radius: 8px;
  color: white;
  padding: 13px 22px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
font-weight: bold;
}

html, body {height:100%;}
html {display:table; width:100%;}
body {display:table-cell; text-align:center; vertical-align:middle;
background-image: linear-gradient(225.35deg,#d23b7d 0,#1c4ea1 100%);
}

.error-msg {
color:red; 
font-weight: bold;
}