* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-size: 1rem;
}

#body {
    display: flex;
    flex-direction: column;
}

#main {
    flex-grow: 1;
    display: block;
    position: relative;
}

#fixed {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    overflow: hidden;
}

#primary {
    display: flex;
    flex-direction: column;
    min-height: 0px;
}

#genealogy {
    flex-grow: 1;
}

#header, #footer {
    flex-grow: 0;
    display: flex;
    flex-direction: row;
}

#header>div, #footer>div {
    flex-grow: 0;
}

h2 {
    flex-grow: 0;
    background-color: lightgray;
    font-size: inherit;
}