<!DOCTYPE html> <html lang="ja"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width

<!DOCTYPE html>
<html lang="ja">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <title>NEON GRID VECTOR 3D</title>
    <!-- Tailwind CSS -->
    <script src="https://cdn.tailwindcss.com"></script>
    <!-- Three.js CDN -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
    <style>
        body, html {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            background-color: #050508;
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            user-select: none;
            -webkit-user-select: none;
        }
        /* 3D Canvas */
        #game-canvas {
            position: absolute;