html,
body {
  font-family: monospace;
  height: auto;
  padding: 50px;
  margin: 0;
}
.hidden {
  display: none;
}
#changecredentials {
  border: 2px solid #87b379;
  border-radius: 5px;
  padding: 5px;
  box-shadow: 1px 1px 1px #3a0d80;
  width: auto;
  display: inline-block;
  float: right;
  margin-top: -80px;
  cursor: pointer;
}
#login {
  margin: 200px auto;
  width: 500px;
  border: 3px solid #87b379;
  border-radius: 10px;
  padding: 30px;
  box-shadow: 3px 3px 3px #3a0d80;
  line-height: 24px;
}
#login h1 {
  text-align: center;
  margin-top: 0;
}
#login label {
  width: 100px;
  display: inline-block;
  text-align: right;
  padding-right: 10px;
}
#login input {
  width: 350px;
  border: none;
  border-bottom: 1px solid #000;
}
#login input.error {
  border-color: red;
}