html {
    font-family: system-ui, sans-serif;
    background: #f7f7f7;
    color: #222;
}
body {
    margin: 0;
}
main {
    max-width: 720px;
    margin: 12vh auto;
    padding: 32px;
}
h1 {
    font-weight: 600;
}
p {
    line-height: 1.5;
}