.card {
	display: inline-block;
	padding: 10px 5px 15px;
	text-align: center;
}

#container {
	width:100%; height:100%;
	text-align: center;
}

#content {
	width: 80%;
  margin: 0 auto;
}

a:link, a:visited {
    background-color: gray;
    border: none;
    color: #FFFFFF;
    padding: 5px 16px;
    text-align: center;
    text-decoration: none;
   font-size: 16px;
   cursor: pointer;
   display: inline-block;
}

a:hover, a:active {
   background-color: #111;
}