index.html
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Flexbox</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="container">
<div class="item-1">1</div>
<div class="item-2">2</div>
<div class="item-3">3</div>
</div>
</body>
</html>style.css
@charset "utf-8";
.container {
border: 8px solid blue;
display: flex;
height: 240px;
}
.item-1 {
width: 80px;
height: 80px;
background-color: pink;
align-self: center;
}
.item-2 {
width: 80px;
height: 80px;
background-color: skyblue;
margin-left: auto;
}
.item-3 {
width: 80px;
height: 80px;
background-color: orange;
}