body {
  margin: 30px;
}

#title {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

#id_url {
  width: 300px;
  margin: 10px;
}

#about_link {
  text-decoration: none;
  font-size: 12px;
}

.alert {
  color: red;
}

form {
  text-align: center;
}