Initial commit

layout.php

@@ -0,0 +1,21 @@
+<?php
+if (basename(__FILE__) == basename($_SERVER['PHP_SELF'])) {
+    http_response_code(403);
+    exit;
+}
+?>
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Tools | <?= $topic ?></title>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Lexend:wght@100..900&display=swap" rel="stylesheet">
+    <link rel="stylesheet" href="/assets/styles.css?v=<?= filemtime(__DIR__ . '/assets/styles.css') ?>">
+</head>
+<body>
+    <?= $content ?>
+</body>
+</html>