.navbox{
    background-color: white;
    position: sticky;
    top: 0;
    border-bottom: 2px solid black;
}

.stickynav{
    float: right;
    margin-right: 5em;
}

.navmenu{
    color: blue;
    display: inline-block;
    margin: .5em;
}

.navmenu .popup{
    background-color: white;
    margin-left: calc(-1ex - 2px);
    padding: 0 1ex .5ex;
    position: absolute;
    border: 2px solid black;
    border-top: 0;
    border-radius: 0 0 5px 5px;
    display: none;
}

.navmenu:focus-within .popup,
.navmenu:hover .popup{
    display: block;
}

.navmenu .popup a{
    display: block;
}

.navmenu .popup *{
    margin-top: .5em;
}

.navmenu .popup *:hover{
    border-left: .5em solid black;
    margin-left: -.5em;
}

.breadcrumbs{
    display: inline;
    margin-left: 1em;
    padding: 5px;
    border-bottom: 2px solid black;
    border-radius: 3px;
}

.clearfix{
    clear: both;
}