body{margin:0;background:#020716;color:#fff;font-family:Arial;text-align:center}.hero{padding:70px 20px;background:linear-gradient(rgba(0,0,0,.25),rgba(0,0,0,.8)),url('../images/fond_decran.png') center/cover}.hero img{width:160px}.card{margin:20px auto;padding:25px;max-width:680px;border-radius:24px;background:#0d1324;border:1px solid #1299ff}a{display:block;margin:12px auto;padding:15px;border-radius:14px;background:#111a31;color:#fff;text-decoration:none;max-width:320px}.qr{width:220px;background:#fff;padding:10px;border-radius:18px}