<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
* {
box-sizing: border-box;
}
body {
font-family: Arial, Helvetica, sans-serif;
}
.column {
float: left;
width: 25%;
padding: 0 5px;
}
.row {margin: 0 -5px;}
.row:after {
content: "";
display: table;
clear: both;
}
@media screen and (max-width: 600px) {
.column {
width: 100%;
display: block;
margin-bottom: 10px;
}
}
.card {
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
padding: 16px;
text-align: center;
background-color: #444;
color: white;