aside{
  width:30%;
  padding-right: 5%;
}
main{
  width: 70%;
}
.my75{
  display: flex;
  flex-direction: row;
  margin-top: 7%;
}
@media screen and (max-width:600px){
  .my75{
    flex-direction: column;
  }
  aside{
    width:90%;
    padding-right: 0%;
    margin-left: auto;
    margin-right: auto;
  }
  main{
    width: 90%;
    margin-left: auto;
    margin-right: auto;
  }
}