body {
    height: 100vh;
    padding: 0;
    margin: 0;
    font-family: sans-serif;

    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;

    background: #fff;
    color: #000;
}

@media (prefers-color-scheme: dark) {
    body {
        background: #202023;
        color: #eee;
    }
}

header { margin-top: 5px; }
footer { margin-bottom: 5px; }

a {
    color: #5b8a55;
}
a:hover {
    filter: brightness(120%);
}