*{margin:0;padding:0;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}
body{background:#0a0a0a;color:#fff;text-align:center;padding:30px}
.logo{width:180px;margin-bottom:20px}
h1{font-size:26px;margin-bottom:40px}
.grade{margin-top:30px}
.cards{display:flex;justify-content:center;flex-wrap:wrap;gap:20px}
.card{background:#1a1a1a;padding:30px;border-radius:10px;width:200px}
.card span{font-size:32px;font-weight:bold;display:block}
.whatsapp{position:fixed;bottom:25px;right:25px;background:#25D366;color:white;width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:28px;text-decoration:none}
footer{margin-top:60px;font-size:14px;opacity:.7}
@media(max-width:600px){
h1{font-size:20px}
.card{width:100%}
}