<head>
  <meta charset="UTF-8">
  <title>CSS</title>
  <style>
    h1 {color: red; }
  </style>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <h1>CSS入門</h1>
  <p style="color: blue;"">はじめてのCSS</p>
</body>
h1{    font-size:40px;}

External CSS

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External JavaScript

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