body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 800px;
    margin: 100px auto;
    background: white;
    padding: 40px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    border-radius: 10px;
}
h1 {
    color: #222;
}