*t{border: solid black 1px}


#titre{
    background-color: #99e6bf;
    width:80%;
    margin: 30px 10% 5% 10%;
    border: solid #AAA 1px;
    border-radius: 10px;
    box-shadow: 2px 2px 3px #AAA;
    text-align: center;}

.introBody{
    background: rgb(255, 255, 255);}

.introduction{
    width:80%;
    margin: 100px 10% 5% 10%;
    text-align: left;}

#mainBox{
    width:80%;
    margin: 50px 10% 5% 10%;
}

#leftColumn, {
    position: relative;
    background-color: white;
    display:inline-block;
    width:60%;}


#leftAside{                            /* Affichage bouton retour */
    padding: 20px 0px 20px 0px;
    text-align: center;
    position: fixed;
    right: 4.2%;
    bottom: 50px;
    width:150px;
    box-shadow: 5px 5px 6px #AAA;
    border: solid red 1px;
    border-radius: 20px;
    text-decoration: none;}

#leftAside:hover{
    text-decoration: none;
    background-color: white;/*rgba(255,0,0,.15);*/
    border: solid red 1px;
    border-radius: 20px;
    box-shadow: 1px 1px 3px #AAA;
    }



.sectionCours{                         /* Affichage des sections de Cours */
    width: 100%;}

.sectionBox{
    width: 40%;
    display: inline-block;
    margin: 10px 5px 10px 5px;}