html,body {
    padding: 0;
}

header {
    background: red;
    text-align: center;
    margin: 0;
    padding: 10px 0;
    color: #000;
}

header h1 {
    font-size: 60pt;
}

main {
    padding: 6px 12px;
    margin: 0 auto;
    max-width: 600px;
    font-size: 15pt;
    line-height: 1.5;
}

ol > li::marker {
    font-weight: bold;
    color: red;
}

ol > li {
    margin: 12px 0;
}

a {
    color: red;
}

@media (prefers-color-scheme: dark) {
    html {
        background: #000;
        color: #fff;
    }
}