body {
  	background-image: url(Hintergrundbilder/emotions1.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    height: 100vh;
}

header, nav, aside, footer, #news {
    opacity: 0.7;
}

article {
    position: relative;
}

article::before {
    background: black;
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    opacity: 0.75;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

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

/* Change the link color to #111 (black) on hover */
li a:hover {
    background-color: #111;
}

/*Seiteauf der man sich gerade befindet*/  
.active {
    background-color: #4CAF50;
}

/* Add a gray right border to all list items, except the last item (last-child) Trennung der Listenelemente */
li {
    border-right: 3px solid #bbb;
}

li:last-child {
    border-right: none;
}