body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f9;
    margin: 0;
    padding: 20px;
    text-align: center;
}
.container {
    max-width: 500px;
    margin: auto;
}
h1 {
    color: #2196F3;
}
.card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    margin-top: 20px;
    text-align: left;
}