@import url("https://fonts.googleapis.com/css?family=Nunito:400,700&display=swap");

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #fdfdfd;
    font-family: "Nunito", sans-serif;
    font-size: 1rem;
    box-shadow: 0 10px 0 0 #104E8B inset;  
}

/* Make content area fill the entire browser window */
html,
.fullscreen {
    display: flex;
    height: 100%;
    margin: 0;
    padding: 0;
    width: 100%;

    /* The image used */
    background-image: url("../images/hintergrund.jpg");
    /* Center and scale the image nicely */
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}

main {
    width: 96%;
    max-width: 960px;
    margin: auto;
    margin-top: 25px;/* weil sonst mittig zentriert*/
    padding: 0.5rem;
    text-align: center;  
}

.content{
    background-color: rgba(255, 255, 255, 0.8);
    padding: 2%;
    border-radius: 10px;
}

.pwabtn{
    width: 90%;
    max-width: 500px;
    border-radius: 6px;
    cursor: pointer;
    border: 1px #222 solid;
    padding: 15px;
    background-color: #00BFFF;
    color: #fff;
    font-size: 1.25rem;
}

.pwabtn:hover{
    background-color: #555;
    color: #fff;
}

nav {
    /*display: flex;*/
    justify-content: space-between;
    align-items: center;
    position: fixed;
    bottom: 0px;
    /*background-color: #FFFF00;*/
    /*padding-bottom: 20px;*/
    /*padding-top: 20px;*/
    color: #000;
    width: 100%;
}

ul {
    list-style: none;
    margin-right: auto;
    margin-left: auto;
}

nav ul li a{
    display: block;
    width: 25%;
    float: left;
    text-align: center;
    background-color: #fff;
    color: #000;
    padding: 25px;
    text-decoration: none;
}

nav ul li a.navitem-1{
    background-color: #aaa;    
}
nav ul li a.navitem-2{
    background-color: #ccc;    
}
nav ul li a.navitem-3{
    background-color: #eee;    
}
nav ul li a.navitem-4{
    background-color: #ffff00;    
}

h1 {
  color: #555;
  margin-bottom: 0.5rem;
}

.embed-container {
  position: relative; 
  padding-bottom: 56.25%; /* ratio 16x9 */
  height: 0; 
  overflow: hidden; 
  width: 100%;
  height: auto;
}
.embed-container iframe {

  position: absolute; 
  top: 0; 
  left: 0; 
  width: 100%; 
  height: 100%; 
}
/* ratio 4x3 */
.embed-container.ratio4x3 {
  padding-bottom: 75%;
}