body
{
background: url("fond.jpg") no-repeat center center fixed;
background-size: 100% 100%;
}

#sommaire
{
width: 390px;
height: 290px;
position: fixed;
top: 35%;
left: 1%;
}

.sommaireimg
{
position: relative;
width: 120%;
left: 7%;
top: 5%;
}

.boutonaccueil
{
width: 4%;
position: fixed;
top: 48%;
left: 5%;
}

.boutonlire
{
width: 4%;
position: fixed;
top: 48%;
left: 9.5%;
}

.boutonliens
{
width: 4%;
position: fixed;
top: 48%;
left: 14%;
}

.boutonmerci
{
width: 4%;
position: fixed;
top: 58%;
left: 5%;
}

#origines
{
width: 35%;
position: fixed;
left: 32%;
top: 32%;
}


section
{
position: fixed;
left: 35%;
top: 40%;
width: 29.5%;
height: 45%;
color: black;
font-size: medium;
text-align: justify;
padding-right: 10px; 
overflow: auto;
}