*{
box-sizing: border-box;
}

/*Create three columns of equal width*/
.columns{
float: left;
width: 33.3%;
padding: 8px;

}

/*Style the list*/
.price {
list-style-type:none;
border: 1px solid #eee;
margin: 0;
padding: 0;
-webkit-transition: 0.3s;
transition: 0.3s;

}

/*add shadow on hover */
.price: hover; {
box-shadow: 0 8px 12px 0 rgba(0,0,0,0.2);

}

/* Pricing header */
.price .header {
  background-color:#111;
   color: white;
   font-size: 25px;
}


/* List items */
.price li {
 border-bottom: 1px solid #eee;
 padding: 20px;
 text-align: center;
}

/*Grey List item */
 background-color: #eee;
 font-size: 20px;
}


/* The "Sign Up" button */
.button {
  background-color: #04AA6D;
  border: none;
 color: white;
  padding: 10px 25px;
  text-align:center;
  text-decoration: none; 
  font-size: 18px;
}

/*Change the width of the three columns to 100%
( to stack horizontally on small screens) */
@media only screen and (max-width: 600px) {
.columns {
  width: 100%;
}

}