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HTML

              
                <div class="container" ng-app="tabPanel">
  <div class="jumbotron" ng-controller="headerCtrl">
    <h1>{{header}}</h1>
    <span>by:</span><a href="http://www.petrusrex.com/" target="_blank"> {{mySite}}</a>
    <br>
    <div class="tab-controller-wrap" ng-controller="tabCtrl" ng-click="tabChange($event)">
      <a href="#awesome1" class="tab-control" ng-class="{'active':tabSelected=='#awesome1'}">Imperial</a>
      <a href="#awesome2" class="tab-control" ng-class="{'active':tabSelected=='#awesome2'}">Metric</a>
      <a href="#awesome3" class="tab-control" ng-class="{'active':tabSelected=='#awesome3'}">BMI Classification</a>
      <hr>
      <div class="content-wrapper">
      <!-- Imperial Calculator -->
        <div id="awesome1" class="ng-hide" ng-show="tabSelected=='#awesome1'">
          <form ng-controller="imperialCtrl">
            <h5>Weight:</h4><input ng-change="computeBMI()" ng-model="statsUS.weightUS"></input><span> lbs.</span>
            <br>
            <br>
            <h5>Height:</h4><input class="input-small" ng-change="computeBmiUS()" ng-model="statsUS.ftUS"></input><span> ft.</span>
            <input class="input-small" ng-change="computeBmiUS()" ng-model="statsUS.inUS"></input><span> in.</span>
            <br>
            <br>
            <b>Your BMI is:</b>
            <h3 class="result">{{statsUS.bmiUS | number: 0}}</h3>
            <br>
          </form>
        </div>
  <!-- Metric Calculator -->
        <div id="awesome2" class="ng-hide" ng-show="tabSelected=='#awesome2'">
           <form ng-controller="metricCtrl">
            <h5>Weight:</h4><input ng-change="computeBmiM()" ng-model="statsM.weightKG"></input><span> kg.</span>
            <br>
            <br>
            <h5>Height:</h4><input class="input-small" ng-change="computeBmiM()" ng-model="statsM.heightCM"></input><span> cm.</span>
            <br>
            <br>
            <b>Your BMI is:</b>
            <h3 class="result">{{statsM.bmiM | number: 0}}</h3>
            <br>
          </form>
        </div>
        <div id="awesome3" class="ng-hide" ng-show="tabSelected=='#awesome3'">
          <div class="row">
            <div class="col-xs-12 col-sm-6">
              <h3>BMI</h3>
              <hr>
                <p>18.5</p>
                <p>18.5–24.9</p>
                <p>25.0–29.9</p>
                <p>30.0–34.9</p>
                <p>35.0–39.9</p>
                <p>≥ 40.0</p>
            </div>
            <div class="chart col-xs-12 col-sm-6">
              <h3>Classification</h3>
              <hr>
                <p>Uderweight</p>
                <p>Normal Weight</p>
                <p>Overweight</p>
                <p>Class I Obesity</p>
                <p>Class II Obesity</p>
                <p>Class III Obesity </p>
            </div>
          
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
              
            
!

CSS

              
                $yellow: #ffff84;
$green: #7fff7f;
$orange: #ffa366;
$red-I: #ff7f7f;
$red-II: #ff6666;
$red-III: #ff4c4c;


body {
 background:url('https://www.dropbox.com/s/7zxkiuyghz7z3ss/black-background.jpg?raw=1');
}

.jumbotron{
  margin-top: 5%;
}

.tab-controller-wrap{
  margin-top: 30px;
}

.tab-control, .tab-control:hover, .tab-control.active{
  color: #fff;
  text-decoration: none;
}

.tab-control {
  padding: 10px 20px;
  background-color: #12A5F4;
}

.tab-control:hover{
  background-color: #70c9f8;
}

.tab-control.active{
  background-color: #0a6392;
}

hr{
  border: 1px solid #12A5F4;
}

.tab-wrapper{
  margin-top: 20px;
}

.content-wrapper > div{
  background-color: #fff;
  padding: 20px;
  line-height: 200%;
}

h5{
  display: inline;
  margin-right: 20px;
}

.input-small{
  width: 4%;
}

//Classification Chart

p {
  padding: 10px;
}

p:nth-child(3){
  background-color: $yellow;
}

p:nth-child(4){
  background-color: $green;
}

p:nth-child(5){
  background-color: $orange;
}

p:nth-child(6){
  background-color: $red-I;
}

p:nth-child(7){
  background-color: $red-II;
}

p:nth-child(8){
  background-color: $red-III;
}




              
            
!

JS

              
                var app = angular.module("tabPanel",[]);

app.controller("headerCtrl", function($scope){
  $scope.header = 'BMI Calculator + Metric';
  $scope.mySite = "Petrus Rex";
});

app.controller("tabCtrl",function($scope){
    $scope.tabSelected = "#awesome1";
    $scope.tabChange = function(e){
        if (e.target.nodeName === 'A') {
            $scope.tabSelected = e.target.getAttribute("href");
            e.preventDefault();
        }
    }
});

app.controller('imperialCtrl', function ($scope){
  $scope.statsUS = {
    weightUS: 0,
    ftUS: 0,
    convertFt: 0,
    inUS: 0,
    heightUS: 0,
    bmiUS: 0};
  
  var computeBmiUS = function(){
  //Convert feet to inches
   $scope.statsUS.convertFt = $scope.statsUS.ftUS * 12;
  //Add converted feet & remainder inches
   $scope.statsUS.heightUS = $scope.statsUS.convertFt + parseInt($scope.statsUS.inUS);
  //calculate BMI
    $scope.statsUS.bmiUS = ($scope.statsUS.weightUS * 703) /    ($scope.statsUS.heightUS * $scope.statsUS.heightUS) ;
  }
  //watch DOM input fields
  $scope.$watch('statsUS.weightUS', computeBmiUS);
  $scope.$watch('statsUS.ftUS', computeBmiUS);
  $scope.$watch('statsUS.inUS', computeBmiUS);
});

app.controller('metricCtrl', function($scope){
  //Let M = Metric
  $scope.statsM = {
    weightKG: 0,
    heightCM: 0,
    heightM: 0,
    bmiM: 0
  };
  
  var computeBmiM = function(){
   $scope.statsM.heightM = $scope.statsM.heightCM / 100;
    //calculate BMI
    $scope.statsM.bmiM = ($scope.statsM.weightKG) /    ($scope.statsM.heightM * $scope.statsM.heightM);
  };
   
  $scope.$watch('statsM.heightCM', computeBmiM);
  $scope.$watch('statsM.weightKG', computeBmiM);
});
              
            
!
999px

Console