div.topbar {
    display: flex;
    justify-content: space-between;
}
a.link_homepage {
    justify-content: flex-start;
}
a.link_back {
    justify-content: flex-end;
}
.wip {
    cursor: help;
    color: red;
}
button {
    cursor: pointer;
}
.rst:hover {
    color: darkred;
}
.redlink {
    color: red;
}
a {
    color: blue;
}