html {
    color-scheme: light dark;
}

body { 
    margin: 0 auto;
    padding: 0 auto;
    font-family: Tahoma, Verdana, Arial, sans-serif;
}

.content {
    width: 30em;
    margin: 0 auto;
}

.content li {
    margin-left: 2em;
}

h1#heading {
    height: 5em;
    width: 100%;
    align-content: center;
    text-align: center;
    vertical-align: middle;
    background-color: cornflowerblue;
    margin: 0 auto;
    padding: 0 auto;
}

h1#heading #logo_container {
    vertical-align: middle;
}

.footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    padding: 0.3em;
    vertical-align: bottom;
}

.footer #footer_left {
    float: inline-start;
}

.footer #footer_right {
    float: inline-end;
    padding-right: 0.6em;
}