@media all and (min-width: 480px) and (max-width: 959px) {
  body.sidebar-first #content,
  body.two-sidebars #content {
    float: left;
  }
  body.sidebar-second #content {
    float: right;
  }

  #sidebar-first {
    float: right;
  }

  #sidebar-second {
    float: left;
  }
  body.two-sidebars #sidebar-second {
    float: right;
    clear: right;
  }
  body.two-sidebars #sidebar-second .block {
    float: right;
  }
}

@media all and (min-width: 960px) {
  #content {
    float: right;
  }
  body.sidebar-first #content {
    left: 0;
    right: 20%;
  }
  body.two-sidebars #content {
    left: 0;
    right: 20%;
  }

  #sidebar-first {
    float: right;
    left: 0;
    right: -80%;
  }
  body.two-sidebars #sidebar-first {
    left: 0;
    right: -60%;
  }

  #sidebar-second {
    float: left;
  }
}