* {
    box-sizing: border-box;
    text-align: center;
  }

  header{
      background-color: #ebebeb;
      padding: 20px;
      margin-bottom: 20px;
  }
  nav{
    background-color: #ebebeb;
    padding: 20px;
    margin-bottom: 20px;
  }
  section{
      float: left;
      background-color: #ebebeb;
      width: 495px;
      margin-right: 20px;     
      clear:left;
  }
  body{
      background-color: #777;
      font-family: 'Arial', 'Helvetica Neue', Helvetica, sans-serif;
      color: #777;
      width: 960px;
      font-size: 18px;
      margin: 0 auto;
  }
  article{
    color: #ebebeb;
    background: #777;
    margin: 10px;
    padding: 20px;
  }
  h1,p{
      
      background: #ebebeb;
      color: #777;
      padding: 20px;
  }
  
  aside{
    float: left;
    background-color: #ebebeb;
    width: 445px;
    padding: 20px;  
    
  }
  .full{
      height: 300px;
      overflow: hidden;
      display: flex;
      margin-bottom: 20px;      
  }
  footer{
    background: #ebebeb;
    color: #777;
    padding: 20px;    
  }