<!DOCTYPE html>
<html>

  <head>
    <meta charset="utf-8" />
    <title></title>
    <script data-require="angular.js@1.6.2" data-semver="1.6.2" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.2/angular.js"></script>
    <link rel="stylesheet" href="./style.css" />
  </head>

  <body ng-app="app">
    <div class="flexbox container" ng-controller="AppController as ctrl">
      <div class="container-head">
        <h3 class="header-title">Flexbox</h3>
      </div>
      <div class="container-body">
        <div class="view">
          <div class="list-block" ng-repeat="list in ctrl.lists">
            <div class="list">
              <div class="list-header">{{list.title}}</div>
              <div class="list-cards">
                <div class="card" ng-repeat="card in list.cards">
                  {{card.title}}
                </div>
              </div>
              <div class="list-footer">
                <a style="cursor: pointer;" ng-click="ctrl.addCard(list)">
                  Add Card
                </a>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
    
    <script type="text/javascript" src="./script.js"></script>
  </body>

</html>
// Code goes here
(function (angular) {
  angular.module("app", []);  
  
  angular.module("app").controller("AppController", AppController);
  
  AppController.$inject = ["$scope"];
  
  function AppController($scope) {
    var ctrl = this;
    ctrl.addCard = function (list) {
      list.cards.push({title: "Card " + (list.cards.length + 1)});
    };
    ctrl.lists = [
      {
        title: "List 1",
        cards: [
          {title: "Card 1"},
          {title: "Card 2"},
          {title: "Card 3"},
          {title: "Card 4"},
          {title: "Card 5"}
        ]
      },
      {
        title: "List 2",
        cards: [
          {title: "Card 1"},
          {title: "Card 2"},
          {title: "Card 3"},
          {title: "Card 4"},
          {title: "Card 5"},
          {title: "Card 6"},
          {title: "Card 7"},
          {title: "Card 8"},
          {title: "Card 9"},
          {title: "Card 10"},
          {title: "Card 11"},
          {title: "Card 12"},
          {title: "Card 13"},
          {title: "Card 14"},
          {title: "Card 15"},
          {title: "Card 16"},
          {title: "Card 17"},
          {title: "Card 18"},
          {title: "Card 19"},
          {title: "Card 20"}
        ]
      },
      {
        title: "List 3",
        cards: [
          {title: "Card 1"},
          {title: "Card 2"},
          {title: "Card 3"},
          {title: "Card 4"},
          {title: "Card 5"}
        ]
      },
      {
        title: "List 4",
        cards: [
          {title: "Card 1"},
          {title: "Card 2"},
          {title: "Card 3"},
          {title: "Card 4"},
          {title: "Card 5"}
        ]
      },
      {
        title: "List 5",
        cards: [
          {title: "Card 1"},
          {title: "Card 2"},
          {title: "Card 3"},
          {title: "Card 4"},
          {title: "Card 5"}
        ]
      }
    ];
  }
}(angular))
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  width: 100%;
}

.container {
  display: -webkit-box;
  display: -webkit-flex;
  display: -moz-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  flex-direction: column;
  float: column;
  height: 100%;
  margin: 0;
  max-height: 100%;
  max-width: 100%;
  padding: 0;
  width: 100%;
}

.container .container-head {
  background: red;
  padding: 10px;
  -webkit-flex-grow: 0;
  -moz-flex-grow: 0;
  flex-grow: 0;
}

.container .container-head .header-title {
  margin: 0;
  padding: 0;
}

.container .container-body {
  background: green;
  display: -webkit-box;
  display: -webkit-flex;
  display: -moz-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  flex-direction: column;
  -webkit-flex-grow: 1;
  -moz-flex-grow: 1;
  flex-grow: 1;
  padding: 5px;
}

.container .container-body .view {
  background: blue;
  box-sizing: border-box;
  display: -webkit-box;
  display: -webkit-flex;
  display: -moz-box;
  display: -ms-flexbox;
  display: flex;
  float: left;
  overflow-x: auto;
  padding: 0;
  -webkit-flex-grow: 1;
  -moz-flex-grow: 1;
  flex-grow: 1;
}

.container .container-body .view .list-block {
  box-sizing: border-box;
  background: darkblue;
  display: inline-block;
  flex: 0 0 auto;
  float: left;
  margin: 0;
  padding: 5px;
  width: 280px;
  min-height:0;
}

.container .container-body .view .list-block .list {
  background: darkorange;
  border-radius: 4px;
  display: -webkit-box;
  display: -webkit-flex;
  display: -moz-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  flex-direction: column;
  float: left;
  max-height: 100%;
  margin: 0;
  min-height: 0;
  min-width: 0;
  width: 100%;
}

.container .container-body .view .list-block .list .list-header {
  background: orange;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  border-bottom: 1px solid darkorange;
  -webkit-flex-grow: 0 0 auto;
  -moz-flex-grow: 0 0 auto;
  flex-grow: 0 0 auto;
  float: left;
  height: auto;
  padding: 10px;
}

.container .container-body .view .list-block .list .list-cards {
  background: orange;
  border-bottom: 1px solid darkorange;
  display: -webkit-box;
  display: -webkit-flex;
  display: -moz-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  flex-direction: column;
  float: left;
  max-height: 100%;
  overflow-y: auto;
  padding: 5px;
}

.container .container-body .view .list-block .list .list-cards .card {
  background: #ffc107;
  border-radius: 4px;
  float: left;
  margin: 5px;
  padding: 10px;
}

.container .container-body .view .list-block .list .list-cards .card:hover {
  background: #fdc002;
}

.container .container-body .view .list-block .list .list-footer {
  background: orange;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
  -webkit-flex-grow: 0;
  -moz-flex-grow: 0;
  flex-grow: 0;
  height: auto;
  padding: 10px;
  float: left;
  text-align: center;
}