li{
    display:inline;
    float:left;
    margin-top:64px;
    margin-bottom: 70px;
}

a{
    display: block;
    padding: 20px 42px;
    background-color: #ffffff;
    border: 1px solid #bbb;
    font-size: 20px;
    color:#000000;
}

li a:hover {
    background-color: #bbb;
}

li a{
    text-decoration: none;
}

#logo{
    float:left;
}

ul {
    position: -webkit-sticky; /* Safari */
    position: sticky;
    top: 0;
    list-style-type: none;
}

#nav1{
    height: 20%;
    background-color: aquamarine;
}

#Breadcrumbs{
    background-color: aqua;
    height:40px;
}