<h1>Check Responsiveness</span></h1>

<ul>
  <li id="dektop">iMac</li>
  <li id="tablet">Portrait iPad</li>
  <li id="mobile">iOS</li>
</ul>

<div class="dektop">
  <iframe src="http://www.freshconsulting.com" frameborder="0"></iframe>
</div>

@charset "UTF-8";
*, *:befrore, *:after {
  box-sizing: border-box;
}

html {
  background: #E74640;
  overflow-Y: scroll;
  transition: background 1s;
}

h1 {
  color: #fff;
  font-family: 'Palatino Linotype';
  font-size: 4rem;
  text-align: center;
  margin-top: 0;
  width: 100%;
}
h1 span {
  display: block;
  font-size: 2.5rem;
  margin: -1rem 0 0;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  text-align: justify;
  width: 20rem;
}
ul:after {
  content: '';
  display: inline-block;
  width: 100%;
}

li {
  color: #fff;
  cursor: pointer;
  display: inline-block;
  font-size: 1.2rem;
  text-transform: uppercase;
}

.dektop, .mobile, .tablet {
  background-image: url('data:image/svg+xml;base64,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');
  background-size: 100%;
  background-image: -moz-linear-gradient(45deg, #f2f6f8 0%, #d8e1e7 60%, #b5c6d0 60%, #e0eff9 100%);
  background-image: -webkit-linear-gradient(45deg, #f2f6f8 0%, #d8e1e7 60%, #b5c6d0 60%, #e0eff9 100%);
  background-image: linear-gradient(45deg, #f2f6f8 0%, #d8e1e7 60%, #b5c6d0 60%, #e0eff9 100%);
  background-image: url('data:image/svg+xml;base64,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');
  background-size: 100%;
  background-image: -moz-linear-gradient(45deg, #f2f6f8 0%, #d8e1e7 60%, #b5c6d0 60%, #e0eff9 100%);
  background-image: -webkit-linear-gradient(45deg, #f2f6f8 0%, #d8e1e7 60%, #b5c6d0 60%, #e0eff9 100%);
  background-image: linear-gradient(45deg, #f2f6f8 0%, #d8e1e7 60%, #b5c6d0 60%, #e0eff9 100%);
  box-shadow: inset 0 0 0 1em #333230, 0 1rem 2rem -1rem rgba(0, 0, 0, 0.6);
  border-radius: 1rem;
  margin: 1rem auto 10rem;
  position: relative;
  -webkit-backface-visibility: hidden;
}
.dektop iframe, .mobile iframe, .tablet iframe {
  left: 1rem;
  position: absolute;
  top: 1rem;
  transform-origin: 0 0;
}

.dektop {
  border-bottom: 3rem solid #c7c3c1;
  height: 18rem;
  width: 32rem;
}
.dektop:after {
  bottom: -3rem;
  content: '♠';
  font-size: 2rem;
  position: absolute;
  text-align: center;
  width: 100%;
}
.dektop:before {
  background-image: url('data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4gPHN2ZyB2ZXJzaW9uPSIxLjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGRlZnM+PGxpbmVhckdyYWRpZW50IGlkPSJncmFkIiBncmFkaWVudFVuaXRzPSJvYmplY3RCb3VuZGluZ0JveCIgeDE9IjAuNSIgeTE9IjAuMCIgeDI9IjAuNSIgeTI9IjEuMCI+PHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iIzYwNWU1ZCIvPjxzdG9wIG9mZnNldD0iMTAwJSIgc3RvcC1jb2xvcj0iI2M3YzNjMSIvPjwvbGluZWFyR3JhZGllbnQ+PC9kZWZzPjxyZWN0IHg9IjAiIHk9IjAiIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbGw9InVybCgjZ3JhZCkiIC8+PC9zdmc+IA==');
  background-size: 100%;
  background-image: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #605e5d), color-stop(100%, #c7c3c1));
  background-image: -moz-linear-gradient(top, #605e5d 0%, #c7c3c1 100%);
  background-image: -webkit-linear-gradient(top, #605e5d 0%, #c7c3c1 100%);
  background-image: linear-gradient(to bottom, #605e5d 0%, #c7c3c1 100%);
  border-radius: 50% 50% 1rem 1rem;
  border-bottom: 0.3rem solid #605e5d;
  bottom: -6rem;
  content: '';
  left: 50%;
  height: 8rem;
  margin-left: -3.5rem;
  position: absolute;
  width: 7rem;
  z-index: -1;
}
.dektop iframe {
  height: calc(400% - 8rem);
  transform: scale(0.25);
  width: calc(400% - 8rem);
}

.mobile {
  border-bottom: 4rem solid #333230;
  height: 18rem;
  height: 28rem;
  width: 18rem;
}
.mobile:after {
  border-radius: 50%;
  box-shadow: inset 0 0 0 0.5rem white, 0 0 0.5rem rgba(0, 0, 0, 0.4);
  bottom: -3rem;
  content: '';
  height: 3rem;
  left: 50%;
  margin-left: -1.5rem;
  position: absolute;
  width: 3rem;
}
.mobile iframe {
  height: 35rem;
  transform: scale(0.75);
  width: 21.4rem;
}

.tablet {
  border-bottom: 4rem solid #333230;
  height: 27rem;
  width: 22rem;
}
.tablet:after {
  border-radius: 50%;
  box-shadow: inset 0 0 0 0.2rem white, 0 0 0.5rem rgba(0, 0, 0, 0.4);
  bottom: -2.5rem;
  content: '';
  height: 2.5rem;
  left: 50%;
  margin-left: -1.5rem;
  position: absolute;
  width: 2.5rem;
}
.tablet iframe {
  height: 63rem;
  transform: scale(0.4);
  width: 50rem;
}

$('#dektop').click(function() {
   $('div').removeAttr('class');
  $('div').addClass('dektop');
  $('html').css("background","#E74640");
});

$('#tablet').click(function() {
   $('div').removeAttr('class');
  $('div').addClass('tablet');
  $('html').css("background","#3E82F7");
});

$('#mobile').click(function() {
   $('div').removeAttr('class');
  $('div').addClass('mobile');
  $('html').css("background","#25B415");
});