_tutorial.scss

##{$name} {
  .tutorial {
    display: none;
    height: 290px;
    left: 50%;
    margin-left: -137px;
    margin-top: -130px;
    position: fixed;
    overflow: hidden;
    top: 50%;
    width: 275px;
    z-index: 100;
  }

  .tutorial__image {
    background-image: url(img/tutorial/maze.gif);
    background-position: 0 0;
    background-repeat: no-repeat;
    background-size: contain;
    height: 270px;
    left: 0;
    position: absolute;
    top: 0;
    width: 275px;
    z-index: 2;
  }

  .tutorial::before {
    background: url(img/tutorial/shadow.svg) no-repeat;
    content: "";
    height: 270px;
    left: 0;
    opacity: 0.15;
    position: absolute;
    top: 20px;
    width: 275px;
    z-index: 1;
  }
}