body {
    background-color: black;
    color: lightgrey;
    margin: 0;
}

#header {
    height: 3em;
}

#header a {
    color: lightgrey;
    height: 2.5em;
    font-weight: bold;
    text-decoration: none;
    cursor: pointer;
    margin: 0 0.5em;
}

#header li {
    margin: 0 1em;
}

#header ul {
    height: 100%;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
}

.content {
    object-fit: scale-down;
    width: 100%;
    height: calc(100vh - 3em);
}