HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

  <meta name=viewport content="width=device-width,initial-scale=1">

  <title>Fancy Underline Example</title>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7;font-size:.95rem}h1{margin:0 0 .75rem;font-size:1.25rem;color:#0f172a}.fancy-underline{text-decoration-color:red;text-decoration-thickness:2px;text-underline-offset:3px}</style>

</head>

<body>

  <h1>Fancy Underline</h1>

  <p>Explore our <u class=fancy-underline>creative</u> collection.</p>

</body>

</html>

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HTML u Tag — Fancy Underline with CSS