@media screen and (max-width: 768px) {
  nav.menleiste .menu {
    display: none;
    flex-direction: column;
    background: #6da6c4;
    width: 100%;
  }
  nav.menleiste .menu.active {
    display: flex;
  }
  nav.menleiste .menu li a {
    padding: 0.75em;
    text-align: center;
  }
  .menu-toggle {
    display: block;
    position: absolute;
    right: 1em;
    top: 0.5em;
    cursor: pointer;
    padding: 1em;
  }
  .menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px;
    background: #393121;
  }
}