I'm currently working on my portfolio and every time I try to add new code/items to my section, the current item gets pushed to the top and out of the viewport. I'm not sure what's causing this in my code. I'm using JSX, and I feel like the problem is with my app.js and app.css, which dictate the entire React application. This is my current CSS:

html{
  font-size: 62.5%;
}

body{
  height: 300vh;
  overflow: auto;

  background: #136a8a;   /*fallback for old browsers */
  background: -webkit-linear-gradient(
    to right,
    #267871,
    #136a8a
    );  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(
    to right,
    #267871,
    #136a8a
      ); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

  color: black
}

.pages{
  position: absolute;
  left: 40%;
  top: 40%;
  transform: translate(-40%, -40%);
  font-size: 5rem;
}

/* .scroll{
  padding: 12px;
  height: 2000px;
} */



 @media only screen and (max-width:1322px){
  .pages{
    font-size: 3.5rem;
    padding-top: 1px;
  }
 }
@media only screen and (max-width:900px){
  .pages{
    font-size: 2.7rem;
  }
} 
@media only screen and (max-width:700px){
  .pages{
    font-size: 2rem;
  }
} 
@media only screen and (max-width:500px){
  .pages{
    font-size: 1.5rem;
  }
} 
@media only screen and (max-width:400px){
  .pages{
    font-size: 1.2rem;
  }
} 
@media only screen and (max-width:280px){
  .pages{
    font-size: 1.1rem;
  }
}

I thought it might be a problem of not being high enough, but no matter how high I put it it doesn't work. It could also be a problem with positioning, but I tried to adjust the positioning of the top more, but it would affect a lot of things, I have adjusted most of the code based on this positioning, please help. Thanks!