@media screen and (max-width: 600px) {
  #backToTop {
    display: none;
  }

  /*
  .menu {
    display: block;
    background-color: #990000;
    
    border-radius: 10px;
    padding: 15px;

    position: absolute;
    top: 4rem;
    right: 0;
  }

  header #menuToggle {
    display: inline-block;
  }
  */

  main {
    max-width: 95%;
  }

  #userDetails {
    grid-template-columns: 1fr 6fr 1fr;
  }
}