html,
body {
  height: 80%;
  background-color: #000000;
}

.error {
  color: #FF0000;
  font-weight: normal;
}

.form-signin {
  max-width: 350px;
  padding: 1rem;
}

.btn {
  border-radius: 5px;
}

/* CSS rules here for screens lower than 750px */
@media all and (max-width: 750px) {
  html,
  body {
    font-size: 10px;


  }
}

/* CSS rules here for screens above 750px */
@media all and (min-width: 750px) {
  html,
  body {


  }
}