body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    color: #222;
}

.container {
    max-width: 720px;
    margin: 48px auto;
    padding: 24px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

h1 {
    margin-top: 0;
}