header{
    width: 1344px;
    height: 170px;
    text-align: center;
    display: block;
    padding-left: 290px;
}
nav{
    width: 1344px;
    height: 48px;
    alignment: center;
    text-align: center;
    background-color: orange;
    float: center;
    padding-top: 20px;
    border-top: 10px solid#FFFFFF;
    display: block;
}
nav ul{
    list-style-type: none;
    margin-left: 0px;
    padding-left: 0px;
    display: inline;
}

nav li{
    display: inline;
    margin: 19px;
    padding: 19px;
}

nav a{
    color: #FFFFFF;
    font-size: normal;
    text-decoration: none;
    font-size: 1.5em;

}

nav a:hover{
    color: green;
    background-color: #EDFF21;
    border: dashed;
    border-color: #EDFF21;
    opacity: 0.7;
}

nav a:visited{
    font-size: normal;
}

body{
    width: 1920px;
    height: 1080px;
    margin: 20px, auto;
    background: fixed;
    background-image: url("multimedia/cartinaSfondoGrande.jpg");
    background-repeat: no-repeat;
    background-color: white;
    font-size: 95%;
    line-height: 1.4em;
    font-family: Helvetica, Arial, Verdana;
}

aside{
    float: left;
    width: 288px;
    height: 862px;
    text-align: left;
    padding-left: 2px;
    padding-top: 20px;
    color: white;
    opacity: 0.7;
}

aside hr{
    background-color: red;
    text-align: center;
    height: 6px;
    width: 200px;
}

section{
    float: left;
    width: 1344px;
    height: 1945px;
    text-align: right;
    background-color: #ffffff;
    padding-top: 20px;
    opacity: 0.9;   
}

footer{
    clear: both!important;
    background-color: #3b3b3b;
    height: 20px;
    width: 1344px; 
    color: white;
    text-align: center;
    margin-left: 290px;
}

article{
    text-align: center;
    width: 1344px;
    height: 862px;
}

article p{
    font-size: 1.4em;
    padding: 10px;
    text-align: left;
}
article h2{
    font-size: 1.9em;
    text-align: center;
    color: red;
}

#walll{
    height: 1080px;
    width: 1920px;
    background-color: black;
    opacity: 0.7;
    position: absolute;
    top: 0px;
    left: 0px;
}