@media (prefers-color-scheme: dark) {
    body {
        color: white;
        background-color: black;
    }
    a:link, a:visited {
        color: #46a2ff
    }
}
body {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
body > h1 {
    flex: 0 0 auto;
}
#world {
    flex: 1 1 0;
}
body > section {
    display: grid;
    gap: 12px;
}
body > section > * {
    margin-top: 0;
    padding-top: 0;
    margin-bottom: 0;
    padding-bottom: 0;
}