fontsize

by rootjang

HTML

<!DOCTYPE html>
<html lang="ko-KR">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>em</title>
  <style>
    h1 {
      font-size: 3em;
    }
    p {
      font-size: 1em;
    }
  </style>
</head>
<body>
  <h1>3em</h1>
  <p>1em</p>
</body>
</html>