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public/index.php

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+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta charset="utf-8">
+    <title>ホーム - 社員メンテナンスシステム</title>
+    <!-- Bootstrap 5 CDN -->
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+</head>
+
+<body>
+    <!-- ナビバー -->
+    <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
+        <div class="container">
+            <a class="navbar-brand" href="index.php">社員メンテナンスシステム</a>
+        </div>
+    </nav>
+
+    <div class="container mt-4">
+        <h1 class="mb-4">ホーム</h1>
+        <div class="list-group">
+            <a href="controller.php?action=list" class="list-group-item list-group-item-action">社員一覧</a>
+            <a href="controller.php?action=register" class="list-group-item list-group-item-action">社員登録</a>
+        </div>
+    </div>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+</body>
+
+</html>