body{
  font-family: "Tahoma", sans-serif;
  background: #333;
  color: #fff;
}

h2{
  text-align: center;
}

.col{
  float: left;
  width: 50%;
  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:hover, .price-box.best{
  box-shadow: 0 10px 15px 0 #000;
}

.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%;
  }
}