/* Navbar container */

/* slideshow container */
.flex-container {
	display: flex;
	flex-direction: column;
	max-width: 45em;
	border: none;
	
	
}

/* Next & previous buttons */
.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
}
/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
  background-color: rgba(0,0,0,0.8);
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* The dots/bullets/indicators */
.dot {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active {
  background-color: #717171;
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  animation-name: fade;
  animation-duration: 1.5s;
}

@-webkit-keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

@keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
  .text {font-size: 11px}
}	
.bild {
	position: absolute;
	clip: rect(10px 1400px 550px 0px);
	overflow:hidden;
}
* {
	box-sizing: border-box;
}

html {
	font: 1em/1.4 Georgia, arial;
	padding: 12px;
}

table {
	border:collapse:collapse;
	border-spacing:0;
	border-width: thin 0 0 thin;
	margin: 0 0 1em;
	table-layout:auto;
	max-width:60%;
}
table, th, td, caption {
	border-collapse: collapse;
	border: 1px solid #a0a0a0;
	margin: 2em;
	
}
th{
	font-weight:normal;
	text-align: left;
    padding:1em;
    font-size:1.2em;	
}

td {
	font-weight:normal;
	text-align: center;	
	 padding:1em;
}
th, caption {
	background-color: #f1f3f4;
	font-weight: 500;
	
}
tr {
	border-top: 1px solid;
	border-bottom: 1px solid;
}

tr:first-child {
	border-top: 0 none;
}

nav {
	box-sizing:border-box; /* neu eingefuegt*/
	float:left;
    width:100%;
	min-width:180px;
    background:#4682B4;
    font-size:20px; 
	font-family:sans-serif;
	border-left:1px solid #FAFAFA;
	border-right:1px solid #FAFAFA;
	top:0;
	position:fixed;
	z-index:999;
}
nav ul { 
	margin: 5px;
	padding:0px;
	
}

nav a {
	display:left;
	color: white;
	bottom: 50px;
	text-decoration: none;
}
nav ul li {
	position: relative;
	float: left;
	list-style:none;
	margin-top:10px;
	min-width:250px;
	background:#4682B4;
	}
nav ul li:hover:not(.active) {   /* sobald dropdown mouseover */
	background: #4096ee;
}

.active {
	background-color:#4682B4;
	/* background-color:#4CAF50; */
	
}	
nav ul li a {  /* bestimmt die Groesse der Headline */
	padding: 0px;
	}
nav ul ul {
  position:absolute;
  top: -9999px;
  left: -9999px;
  background: #4096ee; 
  color: black;  
  box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.6);
}
 
nav ul ul li { /* Box für die Dropdowns */
  float: left;
  width: 350px; /* length von dropdowns */
  color: #fff;
  border-bottom: 2px solid #555;
}
 
nav ul ul li a {
	z-index:3;
  padding: 5px 20px;
}
nav ul li:hover > ul {
  top: 60%;
  left: 0;
}
nav ul ul li:hover > ul {
  margin-top: 0px;
  left: 0px;
}
nav ul li.submenu > a:after {
  position: relative;
  float: right;
  content: '';
  margin-left: 10px;
  margin-top: 5px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid #fff;
  border-bottom: 5px solid transparent;
}
nav ul ul li:last-child {
  border-bottom: none;
}
<style>
.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  background-color: grey;
  color: black;
  text-align: left;
}
</style>