<style>
@media only screen and (max-width: 736px) {
  #navigator {
    width: 90%;
    margin: auto;
    float: none;
  }

  #mainContent {
    width: 90%;
    margin: auto;
    float: none;
  }

  #sideBar {
    width: 90%;
    margin: auto;
    float: none;
  }
canvas#live2dcanvas { border: 0 !important; left: 0; }
</style>