<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.flex-container {
display: flex;
align-items: center; /* Use another value to see the result */
width: 100%;
height: 200px;
background-color: #1faadb;
}
.flex-container > div {
width: 25%;
height: 60px;
margin: 5px;
border-radius: 3px;
background-color: #8ebf42;
}
</style>
</head>
<body>
<div class="flex-container">
<div></div>
<div></div>
<div></div>
</div>
</body>
</html>