body {
  background-color: lightgreen;
}
@media only screen and (max-width: 600px) {
  body {
    background-color: lightblue;
  }
  input#kw {
    height:30px;
    width:200;
    font-size:14pt;
  }
  input#search {
    height:30px;
    width:100;
    font-size:14pt;
  }
  mark {
      color: red;
  }
}