div#navigation-bar {

    background-color: #006666;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: left;
    margin-top: 5px;
    color: white;
    padding-left: 15px;
    padding-right: 15px;
}

div#navigation-bar > div {

    
}

div#navigation-bar > div:hover {

    background-color: #99CCCC;
    animation: hoverNav 150ms;
}

@keyframes hoverNav {
    from {
        background-color: #006666;
    }
    to   {
        background-color: #99CCCC;
    }
  }

div#navigation-bar a {

    padding-left: 12px;
    padding-right: 12px;
    padding-top: 8px;
    padding-bottom: 8px;

    display: block;

    color: white;
    text-decoration: none;
}

div.current-nav {

    background-color: #99CCCC;  
}

div#header-line {
    display: none;
    background-color: #006666;
    height: 10px;
}

@media only screen and (max-width: 600px) {

    div#navigation-bar {
        display: none;
    }

    div#header-line {
        display: block;
    }
}