HTML <style> tag example at PNLdev

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>صفحه وب با استایل</title>
  <style>
    body {
      font-family: 'Arial', sans-serif;
      background-color: #f8f8f8;
      color: #333;
      margin: 20px;
      text-align: center;
    }

    h1 {
      color: #0066cc;
      text-decoration: underline;
    }

    p {
      color: #333;
      font-size: 18px;
    }
    button {
      background-color: #4caf50;
      color: white;
      padding: 10px 20px;
      font-size: 16px;
      border: none;
      cursor: pointer;
      border-radius: 5px;
    }
    button:hover {
      background-color: #45a049;
    }
  </style>
</head>
<body>

  <h1>Hello, welcome to our website!</h1>
  <p>This is an example of HTML and CSS styling. We can change background color, text color, font and other features.</p>

  <button>click</button>

</body>
</html>