@media (min-width: $media-mobile-middle) and (max-width: $media-mobile-max) {
  .header-mobile {
    &__menu {
      width: 320px;
      box-shadow: -5px 0 5px rgba(0,0,0,.05);
      transition: transform 300ms;
      transform: translate3d(320px,0,0);
      &.is-open {
        transform: translate3d(0,0,0);
      }
    }
  }
}