<div class="controls">
<select id="writingMode">
  <option value="horizontal-tb">horizontal-tb</option>
  <option value="vertical-lr">vertical-lr</option>
  <option value="vertical-rl">vertical-rl</option>
</select>
</div>

<div id="container">
  <div class="box logical"> Logical Property</div>
  <div class="box physical"> Physical Property</div>
</div>

@import 'https://fonts.googleapis.com/css?family=Share+Tech+Mono';

@import 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css';

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
    width: 100vw;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/1376484/jess-harding-lqT6NAmTaiY-unsplash.jpg'),radial-gradient(#28a3dd, #0d7751);
    background-size: cover;
    background-position: center;
    font-family: "Share Tech Mono", monospace;
    font-size: 2rem;
    background-blend-mode: multiply,screen, overlay;
}

#container {
    position: relative;
    background-size: cover;
    background-position: center;
    backdrop-filter: blur(20px);
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 5px;
    padding:5vw;
    box-sizing: border-box;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    transition: .3s ease;
    margin: 2vw;
    
    display: flex;
    justify-content: center;
}

.control {
  padding-bottom: 5vh;
  margin-bottom: 6vh;
  border-bottom: 3px double currentColor;
  color: #fff;
  text-shadow: 1px 1px 2px rgba(0,0,0,.5);
  font-size: 6vh;
}

.box {
  background: #FF9800;
  border-radius: 5px;
  margin: 5px;
  box-shadow: 0 0 3px rgba(0,0,0,.5);
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  text-shadow: 1px 1px 2px rgba(0,0,0,.5);
  position: relative;
  
  &.logical{
    inline-size: 25vw;
    block-size: 25vh;
    background-color: #8BC34A;
    
  }
  
  &.physical{
     width: 25vw;
     height: 25vh;
  }
}

var writingMode = document.getElementById("writingMode");
writingMode.addEventListener("change", function (evt) {
  document.getElementById("container").style.writingMode = evt.target.value;
});