body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    margin: 0;
}

* {
    box-sizing: border-box;
}

header {
    padding: 4rem 0 1rem;
    background: linear-gradient(0deg, #fff5f5, #ecc5c5);
}
header h1 {
    font-size: 3em;
    margin-bottom: 0;
}
header h3 {
    font-weight: 600;
    opacity: .8;
}
@media only screen and (max-width: 735px) {
    header h1 {
        font-size: 2.5em;
    }
}
p {
    opacity: .92;
}

header > div {
    padding: 0 1rem;
}
header > div, main {
    max-width: 800px;
    margin: 0 auto;
}

main {
    padding: 1rem 1rem 2rem;
}

@media (prefers-color-scheme: dark) {
    body {
        background: #000;
        color: #fff;
        color-scheme: dark;
    }
    header {
        background: linear-gradient(0deg, #190b0b, #9a3b3b);
    }
}