.sample-tutorial {
   position: relative;
   height: 100%;
   overflow: hidden;
}

body {
   position: absolute;
   top: 0;
   bottom: 0;
   left: 0;
   right: 0;
}

.sample-spreadsheets {
   width: calc(100% - 303px);
   height: 100%;
   overflow: hidden;
   float: left;
}

.container {
   width: 300px;
   height: 100%;
   float: left;
   border: 1px solid lightgrey;
}