.burgerBtn {
    width: 1.5em;
    cursor: pointer;
  }

  .burgerBtn span {
    display: block;
    width: 100%;
    border-radius: 0.1em;
    height: 0.2em;
    background: white;
    position: relative;
    top: 0;
    transition: top .4s ease, transform .4s ease .4s;
  }

  .burgerBtn span+span {
    margin-top: 0.3em;
  }

  .burgerBtn.active span:nth-child(1) {
    top: 0.5em;
    transform: rotate(45deg);
  }

  .burgerBtn.active span:nth-child(2) {
    transform: scaleX(0);
    transition: transform .2s ease;
  }

  .burgerBtn.active span:nth-child(3) {
    top: -0.5em;
    transform: rotate(135deg);
  }

  .burgerBtn:not(.active) span:not(:nth-child(2)) {
    top: 0;
    transform: rotate(0deg);
    transition-delay: .4s, 0s;
  }