@mixin animated-burger($color: $white) {

  .line {
    width: 20px;
    height: 2px;
    background-color: $color;
    display: block;
    margin: 3px auto;
    transition: all $transition-duration ease-in-out;
  }

  &[aria-expanded="true"] {
    .line:nth-child(2) {
      opacity: 0;
    }

    .line:nth-child(1) {
      transform: translateY(5px) rotate(45deg);
    }

    .line:nth-child(3) {
      transform: translateY(-5px) rotate(-45deg);
    }
  }
}