<!DOCTYPE html>
<html>
<head>
<style>
p {
color: red;
/* This is a single-line comment */
text-align: center;
}
/* This is
a multi-line
comment */
</style>
</head>
<body>
<p>Hello World!</p>
<p>This paragraph is styled with CSS.</p>
<p>CSS comments are not shown in the output.</p>
</body>
</html>