index.html

<!DOCTYPE html>
<html lang="tr">
<head>
  <meta charset="UTF-8">
  <title>Sayfam</title>
  <link rel="stylesheet" href="style.css">
</head>
<body>

  <h1>Merhaba Dünya!</h1>

</body>
</html>

style.css

body {
  font-family: sans-serif;
  margin: 0;
  padding: 2rem;
  background: #f8f8f8;
  color: #1a1a1a;
}

h1 {
  font-size: 2rem;
  color: #4338ca;
}

script.js

// JavaScript kodunuz buraya
document.addEventListener('DOMContentLoaded', () => {
  console.log('Sayfa yüklendi!');
});