html {
    font-family: Arial, sans-serif;
    background: #f6f7f9;
}
body {
    margin: 0;
}
main {
    max-width: 900px;
    margin: 120px auto;
    padding: 40px;
    background: white;
    border-radius: 12px;
}
h1 {
    font-size: 36px;
}
p {
    font-size: 18px;
}