.slides {
    background: url("../images/loading.gif") center no-repeat;
    min-height: 275px;

    @screen md {
      & {
        min-height: 375px;
      }
    }

    @screen lg {
      & {
        min-height: 450px;
      }
    }

    @screen xl {
      & {
        min-height: 560px;
      }
    }
}