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HTML

<body class="dark-mode">
<base href="https://cdn.jsdelivr.net/gh/gn-math/gn-math.github.io@main/">
<link rel="icon" type="image/png" href="https://codehs.com/uploads/84799a0bb8e09668879b73acd5e7abaa">
<link rel="icon" type="image/png" sizes="32x32" href="https://codehs.com/uploads/84799a0bb8e09668879b73acd5e7abaa">
<link rel="apple-touch-icon" href="https://codehs.com/uploads/84799a0bb8e09668879b73acd5e7abaa">
<link href="https://fonts.googleapis.com/css2?family=Montserrat:wght=900&display=swap" rel="stylesheet">
<script>
window.addEventListener('beforeunload',e=>{e.preventDefault();e.returnValue=''});
window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments)}gtag('js',new Date());gtag('config','G-WX5VS54ZDW');
</script>
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-5521219086088837" crossorigin="anonymous"></script>
<script async src="https://www.googletagmanager.com/gtag/js?id=G-WX5VS54ZDW"></script>
<meta name="google-adsense-account" content="ca-pub-5521219086088837">
<script>(function(){function signalGooglefcPresent(){if(!window.frames.googlefcPresent){if(document.body){const iframe=document.createElement('iframe');iframe.style='width:0;height:0;border:none;z-index:-1000;left:-1000px;top:-1000px';iframe.style.display='none';iframe.name='googlefcPresent';document.body.appendChild(iframe)}else{setTimeout(signalGooglefcPresent,0)}}}signalGooglefcPresent()})()</script>
<script src="https://cdn.jsdelivr.net/gh/gn-math/gn-math.github.io@main/gnmath.js"></script>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Story Network GN Math</title>
<meta name="title" content="GN-Math">
<meta name="description" content="Play unbl*cked games like Crazy Cattle 3D and DriveMad on GN-Math. Fast, free, no downloads—perfect for school or home.">
<meta property="og:type" content="website">
<meta property="og:url" content="https://gn-math.github.io/">
<meta property="og:title" content="GN-Math">
<meta property="og:description" content="Play unbl*cked games like Crazy Cattle 3D and DriveMad on GN-Math. Fast, free, no downloads—perfect for school or home.">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:url" content="https://gn-math.github.io/">
<meta name="twitter:title" content="GN-Math">
<meta name="twitter:description" content="Play unbl*cked games like Crazy Cattle 3D and DriveMad on GN-Math. Fast, free, no downloads—perfect for school or home.">
<meta name="keywords" content="unblocked games, games for school, browser games, chromebook games, no download games, html5 games, free unblocked games, gn-math, fun games at school, crazy cattle 3d, play crazy cattle 3d, crazy cattle 3d unblocked, crazy cattle, crazy cattle unblocked, play crazy cattle, crazy cattle online, crazy cattle 3d online">
<style>
:root{--p:#111;--t:#333;--bg:#d9d9d9;--c:#e5e5e5;--b:rgba(0,0,0,.08);--s:0 6px 24px rgba(0,0,0,.08);--pop:#eee}
.dark-mode{--p:#00f;--t:#e0e0e0;--bg:#000;--c:#252525;--b:rgba(255,255,255,.06);--s:0 6px 24px rgba(0,0,0,.35);--pop:#252525}
*,::before,::after,input,button,select,textarea,h1,h2,h3,h4,h5,h6,p,a,span,div,summary,label,li,td,th{box-sizing:border-box;font-family:Montserrat,sans-serif!important;font-weight:900!important}
body{margin:0;background:var(--bg);color:var(--t);transition:.4s}
header{background:var(--p);color:#fff;padding:1rem;position:sticky;top:0;z-index:100;box-shadow:var(--s)}
.header{display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:auto;flex-wrap:wrap;gap:.5rem}
.logo{display:flex;align-items:center;gap:.5rem;font-size:1.5rem}.logo img{height:40px;border-radius:10px}
.search{display:flex;gap:.5rem}.search input,.search select{padding:.5rem;border:1px solid var(--b);border-radius:12px;background:var(--c);color:var(--t)}
button{background:var(--p);color:#fff;border:none;border-radius:12px;padding:.5rem 1rem;cursor:pointer}
main{max-width:1200px;margin:auto;padding:1rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1.5rem;margin-top:1rem}
.card{background:var(--c);border:1px solid var(--b);border-radius:20px;overflow:hidden;cursor:pointer;box-shadow:var(--s);transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.12)}
.card img{width:100%;aspect-ratio:1;object-fit:cover;border-bottom:1px solid var(--b)}
.card button{width:100%;height:60px;background:0;color:var(--t);border:none;font-size:1rem}
#viewer{position:fixed;inset:0;background:var(--bg);z-index:1000;display:none;flex-direction:column}
#viewer header{background:var(--p);color:#fff;padding:.5rem 1rem;border-radius:0 0 16px 16px;display:flex;justify-content:space-between;align-items:center}
#viewer iframe{flex:1;width:90%;height:90%;margin:16px auto;border:none;border-radius:20px;box-shadow:var(--s)}
#loading{position:fixed;inset:0;background:rgba(0,0,0,.6);display:none;place-content:center;z-index:2000}
.spin{width:60px;height:60px;border:6px solid rgba(255,255,255,.2);border-top-color:var(--p);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
#overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:none;place-items:center;z-index:3000}
.popup{background:var(--pop);border-radius:24px;box-shadow:0 12px 40px rgba(0,0,0,.2);width:90%;max-width:500px;max-height:80vh;display:flex;flex-direction:column}
.popup header{background:var(--p);color:#fff;padding:.75rem 1rem;border-radius:24px 24px 0 0;display:flex;justify-content:space-between;align-items:center}
.popup body{padding:1.2rem;overflow:auto}.popup input{width:100%;padding:.5rem;margin-bottom:1rem;border:1px solid var(--b);border-radius:12px;background:var(--c);color:var(--t)}
footer{background:var(--c);padding:1rem;text-align:center;margin-top:2rem;border-radius:16px 16px 0 0}footer a{color:var(--p);text-decoration:none;margin:0 .5rem}
@media(max-width:768px){.grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}}
</style>

<header><div class="header"><div class="logo"><img src="https://codehs.com/uploads/84799a0bb8e09668879b73acd5e7abaa" alt="logo"> Story Network GN Math</div><div class="search"><input id="q" placeholder="Search…" oninput="f()"><select id="s" onchange="o()"><option value="n">Name</option><option value="i">ID</option><option value="p">Popular</option></select></div><button onclick="set()">Settings</button></div></header>

<main>
<details open><summary style="font-size:1.2rem">Featured</summary><div id="feat" class="grid"></div></details><br><hr><br>
<details open><summary style="font-size:1.2rem">All</summary><div id="all" class="grid">Loading…</div></details><br><hr><br>
<details open><summary style="font-size:1.2rem">Recent</summary><div id="rec" class="grid">None yet.</div></details>
</main>

<div id="viewer"><div id="loading"><div class="spin"></div></div><header><div><h2 id="zn">zone</h2><a id="au" href="#" target="_blank">by Author</a></div><div><button onclick="fs()">Fullscreen</button><button onclick="ab()">New Tab</button><button onclick="dl()">Download</button><button onclick="x()">Close</button></div></header><iframe id="frame"></iframe></div>
<div id="overlay"><div class="popup"><header><h3 id="pt">Title</h3><button onclick="cx()">×</button></header><div id="pb"></div></div></div>

<footer><a href="#" onclick="contact();return!1">Contact</a><a href="#" onclick="privacy();return!1">Privacy</a><a onclick="exportData()">Export</a><label style="color:var(--p);cursor:pointer">Import<input type="file" style="display:none" onchange="importData(event)"></label></footer>

CSS