@media (prefers-color-scheme: dark) {
    :root {
        --dark-bg: #222;
        --dark-color: #ccc;
        --bg-sub: transparent;
    }
    body, body *, div * {
        background: var(--dark-bg);
        color: var(--dark-color);
    }
    a, :where(a) > strong, :where(a) > span {
        color: #6bf;
    }
    /* nav */
    #modal-1 {
        background: var(--dark-bg);
    }
}