teststyle.css

html, body {
    padding: 0;
    margin: 0;
  }

  #container {
    margin: 0;
    height:calc(100vh - 48px);
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: 30% 70%;
    -ms-grid-rows: 50% 50%;
    grid-template-columns: 70% 30%;
    grid-template-rows: 50% 50%;
    grid-template-areas:
      "blockly     frameSite"
      "blockly     testDiv";
  }

  #blocklyArea  {grid-area: blockly; -ms-grid-row:1;-ms-grid-column:1; -ms-grid-row-span:4;}
  #frameSite {grid-area: frameSite; border: 5px solid #ccc;  -ms-grid-row:10;-ms-grid-column:0;margin: 1px}
  #testDiv {grid-area: testDiv; border: 5px solid #ccc;  -ms-grid-row:10;-ms-grid-column:0; margin: 1px;}


  #instructions{
    height:calc(100% - 48px);
    overflow: auto;
    font-size: 1.2em;
    padding-left: 0.5em;
   
  }
  .list{
    margin-bottom: .5em;
  }
  
  
  #output{
    width: 100%;
    height: calc(100% - 48px)
  }
  header{
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    padding: 10px;
    background-color: #dddddd;
    margin-bottom: 1px;
    display: none;
  }

  #site-name{
    font-size: 2em;
    
  }
  i{
    font-size: 2em;
    padding-left: 2em;

  }
/* Begin code from https://www.w3schools.com/howto/howto_js_tabs.asp */
/* Style the tab */
.tab, .testTab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
}

/* Style the buttons that are used to open the tab content */
.tab button, .testTab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
  font-size: 1em;
  font-weight: bold;
}

/* Change background color of buttons on hover */
.tab button:hover, .testTab button:hover {
  background-color: #ddd;
}

/* Create an active/current tablink class */
.tab button.active, .testTab button.active {
  background-color: #ccc;
}

/* Style the tab content */
.tabcontent {
  display: none;
  padding: 6px 12px;
  border: 1px solid #ccc;
  border-top: none;
}

/* End code from https://www.w3schools.com/howto/howto_js_tabs.asp */