form .signature {
  padding: 15px 0;
  display: contents;
}
form .signature img {
  border: 1px solid #ccc;
  border-radius: 8px;
}
form .signature canvas {
  background: #FFF;
  border: 1px dotted #666;
  border-radius: 8px;
}

form .signature button {
  font-size: 14px;
  text-transform: uppercase;
  background-color: #f97f24;
  color: #fff;
  padding: 4px 15px;
  border: 1px solid transparent;
  border-radius: 4px;
  position: absolute;
}
form #signature_thumb {
  float: none;
}