Adjust code for desktop only, NOT mobile version

Hi!

I've been working on my homepage for this website. I added some code to make some images flip over with text on the back. However, this effect won't work on mobile version. How do I adjust the code so that it only functions on the desktop version?

Here is the code I used:

/*Card Flip Effect*/
#block-yui_3_17_2_1_1713154230326_30335, #block-yui_3_17_2_1_1713154230326_25756, #block-yui_3_17_2_1_1713154230326_27995, #block-yui_3_17_2_1_1713154230326_26815, #block-yui_3_17_2_1_1713154230326_31490{
  /* Default Setup */
  &.image-block .sqs-block-content{
    perspective: 2000px;
  }
  .design-layout-poster {
    position: relative;
    transition: transform 0.8s;
    transform-style: preserve-3d;
  }
  //Image
  .design-layout-poster .intrinsic{
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
  //Caption
  .design-layout-poster figcaption{
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform: rotateY(180deg);
    background: hsla(0,0%,100%,1);

    //Add if needed
    //border-radius: 20px;
  }

  /*Hover Effect*/
  &.image-block:hover .design-layout-poster {
    transform: rotateY(180deg);
  }
}

You can change your code to this

@media screen and (min-width:992px) {
/*Card Flip Effect*/
#block-yui_3_17_2_1_1713154230326_30335, #block-yui_3_17_2_1_1713154230326_25756, #block-yui_3_17_2_1_1713154230326_27995, #block-yui_3_17_2_1_1713154230326_26815, #block-yui_3_17_2_1_1713154230326_31490{
  /* Default Setup */
  &.image-block .sqs-block-content{
    perspective: 2000px;
  }
  .design-layout-poster {
    position: relative;
    transition: transform 0.8s;
    transform-style: preserve-3d;
  }
  //Image
  .design-layout-poster .intrinsic{
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
  //Caption
  .design-layout-poster figcaption{
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform: rotateY(180deg);
    background: hsla(0,0%,100%,1);

    //Add if needed
    //border-radius: 20px;
  }

  /*Hover Effect*/
  &.image-block:hover .design-layout-poster {
    transform: rotateY(180deg);
  }
}
}

Thank yo so much, tuanphan!