body {
background: #0a0a0a;
color: white;
font-family: Arial, sans-serif;
text-align: center;
margin: 0;
}

header {
padding: 40px 20px;
}

.logo {
width: 150px;
}

.card {
background: #111;
margin: 20px auto;
padding: 20px;
width: 90%;
max-width: 500px;
border-radius: 10px;
}