html {
  height: 100%;
  width: 100%;
}
.btn{
  font-family: Snell Roundhand, serif;
  background-color: #0095B6;
  border: none;
  color: white;
  padding: 8px 16px;
  text-align: center;
  font-size: 16px;
  margin: 4px 2px;
  opacity: 1;
  transition: 0.3s;
  outline: none;
  box-shadow: 13px -4px 34px -5px rgba(98, 159, 213, 0.7);
}
.back{
   background: linear-gradient(to right top, #380e37, #054a65);
}
.center {
  margin: auto;
  width: 60%;
  border: 3px solid #0f83ff;
  padding: 10px;
}