html quine
<html>
<body>
<p>This page looks the same rendered and in source view.</p>
<p>Made possible by these 10 style rules:</p>
<style>* {display: block; font-family:Monospace; margin: 0;}</style>
<style>a[href]::before {content: "<a href='" attr(href) "'>"}</style>
<style>a::after {content: "</a>"}</style>
<style>body::before {content: "<body>"}</style>
<style>body::after {content: "</body></html>"}</style>
<style>html::before {content: "<html>"}</style>
<style>p::before {content: "<p>"}</style>
<style>p::after {content: "</p>"}</style>
<style>style::before {content: "<style>"}</style>
<style>style::after {content: "<\/style>"}</style>
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</body></html>