body {
    background: url('images/fond.png') repeat-y center top;
    font-family: Verdana, sans-serif;
    font-size: 13px;
    color: #393939;
}
a {
    color: #E3532D;
}
header {
    width: 920px;
    height: 135px;
    margin: auto;
    background: white url('images/header.jpg') no-repeat right top;
    position: relative;
}
.logo {
    margin-top: 20px;
    margin-left: 20px;
}
nav {
    width: 920px;
    background-color: black;
    margin: auto;
    display: flex;
}
.menu-item {
    width: 20%;
    color: white;
    text-align: center;
    padding: 5px 10px;
}
.conteneur-central {
    width: 920px;
    margin: auto;
    background-color: white;
    display: flex;
}
aside {
    width: 280px;
    padding-left: 10px;
}
.expert {
    display: block;
    margin: auto;
}
.legende {
    text-align: center;
    color: grey;
    font-style: italic;
}
section {
    width: 600px;
    padding-left: 10px;
}
section h1 {
    background-color: #E3532D;
    color: white;
    font-size: 24px;
    padding: 5px;
}
.bloc-texte {
    border: 1px solid #E3532D;
    padding: 5px;
    text-align: justify;
    margin-bottom: 20px;
}
.paragraphe-programme {
    margin-bottom: 20px;
    text-align: justify;
}