body {margin:0;}

#nav-placeholder ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: rgb(84,88,90);
    position: fixed;
    top: 0;
    width: 100%;
}

#nav-placeholder li {
    float: left;
}

#nav-placeholder li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

#nav-placeholder li a:hover:not(.active) {
    background-color: rgb(166,25,46);
}

#nav-placeholder .active {
    background-color: rgb(0,112,150);
}


em {
font-size: 125%;
font-style: italic;
background-color: rgb(255, 66, 66);
}

.center{
margin: 0 10em;
}