html {
  background: white;
  text-align: center;
}
body {
  margin: auto;
  max-width: 610px;
  border: 6px double #16161D;
  border-radius: 10px;
  background: rgb(255,255,255);
  background: linear-gradient(328deg, rgba(255,255,255,1) 33%, #486880 95%); 
}
hr {
  color: black;
}
textarea {
  background: #16161D;
  color: white;
}