body{
        background-color: black;
        margin: 0;
}

#wrapper {
        background-color : white;
        margin: 0 auto;
        max-width: 1280px;}

header {
        background-color: grey;
        text-align: center;
        padding: 70px 0;
        }


nav {
        color:white;
        background-color: purple;
        width: 80px;
        height: 300px;
        position: fixed;
        z-index: 9999;
       }

#middle {
        background-color: #c3c3c3;
        font-size: 3em;
        }
        
#haut2{
        justify-content: flex-end;

}

.flex {
        display: flex;
}

.flex div {
        height: 200px;
}

#un {color:white;
     background-color: blue;
     width: 400px;
     margin-left: 100px;
    ;

    }

#deux {color: white;
        background-color: green;
        width: 200px;
        
        }

#trois {
        color: white;
        background-color: red;
        width: 300px;
        }

#quatre {
        color: white;
        background-color: black;
        width: 150px;
        }

#bas {
        position: relative; 
        min-height: 300px;
        }
#bas:hover #bas1 {
        left: 200px;
        opacity: 0.5; 
}
.bot {
        width: 300px;
        height: 150px;
        border: 1px solid black;
        position: absolute;
}
#bas1 {
        background-color: yellow;
        left: 100px;
        z-index: 3;
        cursor: pointer;}

#bas2 {
        background-color: orange;
        left: 150px;
        top: 50px;
        z-index: 2;
}

#bas3 {
        background-color: green;
        left: 200px;
        top: 100px;
        }

footer {
        background-color: grey; 
            text-align: center;
            padding: 10px 0;
        } 

footer a {
        color: white;
        font-size: 20px;
}