#projectlogo img {
    width: auto;
    height: 48px;
    margin: 8px 12px;
    content: url("detlef-light.svg");
}

@media (prefers-color-scheme: dark) {
    html:not(.light-mode) #projectlogo img {
        content: url("detlef.svg");
    }
}

html.dark-mode #projectlogo img {
    content: url("detlef.svg");
}