#login-form {
  position: absolute;
  left: 50%;
  top: 250px;
  transform: translate(-50%, -50%);
  min-height: 300px;
  text-align: center;
  box-shadow: 0px 3px 5px 0px rgba(50, 50, 50, 0.8);
}
#login-form .box-heading {
  padding: 20px;
  box-shadow: 0 1px 3px 0 rgba(50, 50, 50, 0.43);
}
#login-form .box-content {
  text-align: left;
  padding: 20px;
}