.menu-button {
  position: relative;
  display: inline-block;
  margin-left: 2px;
  cursor: pointer;

  &:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(50, 50, 50, 0.9) inset;
  }

  img {
    height: 30%;
    width: 30%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
  }
}