* {
    box-sizing: border-box;
}

html, body {
    overflow-x: hidden;
}




body {
    background-image: url(https://vcdn.polarismedia.no/df6a2e6e-8fea-4290-88e5-32de47d65646);
    display: flex;
    flex-direction: column;
    align-items: center;
    
   
    font-family:  Helvetica, sans-serif, sans-serif;
}

a{ 
    text-decoration: none;
    color: rgb(0, 0, 0);

}

h1 {
    margin: 0;
}

#container{
    background-color: lightgray;
    width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 10px;
    height: auto;
    border: 5px solid black;
    display: block;
    clear: both;
}


#header{
    background-color: rgb(128, 124, 124);
    color: white;
    text-align: center;

}



#content{
    padding: 10px;
}


#nav{
    width: 180px;
    float: left;
    text-align: center;
     border: 5px solid black;
     background-color: aliceblue;
        margin-right: 10px;
}

#nav ul {
    list-style-type: none;
    padding: 0;
   
}

.selected{
    font-weight: bold;

}

#main{
    width: 500px;
    margin-left: auto;
    margin-right: auto;
    height: auto;
   text-align: center;
}
#main h2{
    text-align: center;
}

#footer{
    
    width: 600px; 
    text-align: center;
    clear: both;
    padding: 10px;  
    margin-top: 10px;
    margin-left: auto;
    margin-right: auto;
    

}