.bg-center {
  background-repeat: no-repeat;
  background-position: center center;
}

.bg-top {
  background-repeat: no-repeat;
  background-position: top center;
}

.bg-right {
  background-repeat: no-repeat;
  background-position: center right;
}

.bg-bottom {
  background-repeat: no-repeat;
  background-position: bottom center;
}

.bg-left {
  background-repeat: no-repeat;
  background-position: center left;
}

@media screen and (min-width: 30em) {
  .bg-center-ns {
    background-repeat: no-repeat;
    background-position: center center;
  }

  .bg-top-ns {
    background-repeat: no-repeat;
    background-position: top center;
  }

  .bg-right-ns {
    background-repeat: no-repeat;
    background-position: center right;
  }

  .bg-bottom-ns {
    background-repeat: no-repeat;
    background-position: bottom center;
  }

  .bg-left-ns {
    background-repeat: no-repeat;
    background-position: center left;
  }
}

@media screen and (min-width: 30em) and (max-width: 60em) {
  .bg-center-m {
    background-repeat: no-repeat;
    background-position: center center;
  }

  .bg-top-m {
    background-repeat: no-repeat;
    background-position: top center;
  }

  .bg-right-m {
    background-repeat: no-repeat;
    background-position: center right;
  }

  .bg-bottom-m {
    background-repeat: no-repeat;
    background-position: bottom center;
  }

  .bg-left-m {
    background-repeat: no-repeat;
    background-position: center left;
  }
}

@media screen and (max-width: 60em) and (orientation: landscape) {
  .bg-center-ml {
    background-repeat: no-repeat;
    background-position: center center;
  }

  .bg-top-ml {
    background-repeat: no-repeat;
    background-position: top center;
  }

  .bg-right-ml {
    background-repeat: no-repeat;
    background-position: center right;
  }

  .bg-bottom-ml {
    background-repeat: no-repeat;
    background-position: bottom center;
  }

  .bg-left-ml {
    background-repeat: no-repeat;
    background-position: center left;
  }
}

@media screen and (min-width: 60em) {
  .bg-center-l {
    background-repeat: no-repeat;
    background-position: center center;
  }

  .bg-top-l {
    background-repeat: no-repeat;
    background-position: top center;
  }

  .bg-right-l {
    background-repeat: no-repeat;
    background-position: center right;
  }

  .bg-bottom-l {
    background-repeat: no-repeat;
    background-position: bottom center;
  }

  .bg-left-l {
    background-repeat: no-repeat;
    background-position: center left;
  }
}