For example, this way:
<html>
<head>
<title>Solid line</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<style>
center. { text-align:center; }
</style>
<body>
<p class="center">────────── Letʼs begin ──────────</p>
</body>
</html>
:-)
Pay attention for the meta tag, it's essential. Your spelling is fixed. :-)
I don't want to discuss your design style, but want to note: many will find it questionable.
—SA