<?php
http_response_code(404);
?><!DOCTYPE html>
<html><head><title>404 – Not Found</title>
<style>body{font-family:sans-serif;display:flex;align-items:center;justify-content:center;min-height:100vh;background:#F8F6F3;margin:0}
.box{text-align:center;padding:40px}.box h1{font-size:80px;color:#800000;margin:0}.box h2{color:#333}.box a{color:#800000}</style>
</head><body><div class="box">
<h1>404</h1><h2>Page Not Found</h2>
<p>The page you're looking for doesn't exist.</p>
<a href="javascript:history.back()">← Go Back</a>
</div></body></html>
