body {
  font-size: 32px;
  width: 100vw;
  height: 100vh; }
  body .login-modal {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%); }
    body .login-modal button.login {
      left: 50%;
      position: fixed;
      transform: translateX(-50%); }
  body .user-info {
    opacity: 0%; }
  body.logged-in .login-modal {
    display: none;
    visibility: hidden; }
  body.logged-in .user-info {
    opacity: 100%; }