.col{
    float: left;
    width: 33.3%;
    padding: 8px;
    box-sizing: border-box;
  }
  
  .price-box{
    background: #fff;
    color: #555;
    list-style-type: none;
    border: 1px solid #555;
    margin: 0;
    padding: 0;
    transition: 0.3s;
  }
  
  .price-box .header{
    background-color: #111;
    color: #fff;
    font-size: 25px;
  }
  
  .price-box .header.header-green{
    background-color: #4CAf50;
  }
  
  .price-box li{
    padding: 20px;
    border-bottom: 1px solid #eee;
    text-align: center;
  }
  
  .price-box .emph{
    background-color: #f4f4f4;
    font-size: 20px;
  }
  
  .button{
    background-color: #4CAf50;
    border: none;
    color: #fff;
    padding: 10px 15px;
    text-align: center;
    text-decoration: none;
    font-size: 18px;
  }
  
  @media(max-width:700px){
    .col{
      width: 100%;
    }
  }

.small {
  width: 100px;
}