html{
    background-color: #e0e0e0;
}
*{
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}

@media (max-width: 600px){
header ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: #333;
}

header li{
    display: inline-block;
}

header li a{
    font-family: Arial, Helvetica, sans-serif;
    display: inline-block;
    color: #fff;
    text-decoration: none;
    padding: 0.5em 1em;
}


}

@media (min-width: 600px){

header ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: #333;
}
header li{
    display: inline-block;
}

header li a{
    font-family: Arial, Helvetica, sans-serif;
    display: inline-block;
    color: #fff;
    text-decoration: none;
    padding: 0.5em 1em;
}

header li a:hover{
    background-color: rgba(11,11,11,0.4);
    font-weight: bold;
}

}

.contentdiv{
    padding: 1em;
}