ukraine-timemap/src/scss/_burger.scss

// Burger transition
.side-menu-burg {
  position: absolute;
  overflow: hidden;
  float: right;
  margin: 0;
  padding: 0;
  width: 20px;
  height: 20px;
  appearance: none;
  box-shadow: none;
  border-radius: none;
  border: none;
  cursor: pointer;
  background: none;

  &.hidden {
    display: none;
  }

  span {
    display: block;
    position: absolute;
    top: 9px;
    left: 0px;
    right: 0px;
    height: 2px;
    background: $offwhite;
    border-radius: 4px;
  }

  span::before,
  span::after {
    position: absolute;
    display: block;
    left: 0;
    width: 100%;
    height: 2px;
    background: $offwhite;
    border-radius: 4px;
    content: "";
    transition-duration: 0.2s, 0.2s;
    transition-delay: 0.2s, 0s;
  }

  span::before {
    transition-property: top, transform;
    top: -8px;
  }

  span::after {
    transition-property: bottom, transform;
    bottom: -8px;
  }

  &:hover {
    span::before {
      top: -6px;
    }

    span::after {
      bottom: -6px;
    }
  }

  &.is-active  {
    span {
      background: $midwhite;
      transform: rotate(45deg);
      transition-delay: 0s, 0.2s;
    }

    span::before,
    span::after {
      background: $midwhite;
      transition-delay: 0s, 0.2s;
    }

    span::before {
      top: 0;
      transform: rotate(0deg);
      -webkit-transform: rotate(0deg);
    }

    span::after {
      bottom: 0;
      transform: rotate(-90deg);
      -webkit-transform: rotate(-90deg);
    }

    &:hover {
      span,
      span::before,
      span::after {
        transition: 0.2s ease;
        background: $offwhite;
      }
    }

    &.over-white:hover {
      span,
      span:before,
      span:after {
        transition: 0.2s ease;
        background: $darkgrey;
      }
    }
  }
}

.side-menu-burg:focus {
  outline: none;
}