body {
    margin: 0;
    font-family: Arial;
    background: #f3f3f3;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: #e1f3e1;
    border-bottom: 2px solid #b6deb6;
	font-family: Serif;
}
.logo {
    font-size: 22px;
    font-weight: bold;
}
nav a {
    margin-left: 15px;
    text-decoration: none;
    color: #2d552d;
}
nav a.actif {
    font-weight: bold;
    text-decoration: underline;
}
.banniere {
    text-align: center;
    padding: 60px;
    background: #cde9cd;
}
.banniere.petite {
    padding: 40px;
}
.contenu {
    padding: 20px;
    max-width: 900px;
    margin: auto;
    background: white;
    border-radius: 8px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
th, td {
    border: 1px solid #777;
    padding: 8px;
    text-align: center;
}
footer {
    margin-top: 20px;
    padding: 10px;
    text-align: center;
    background: #e1f3e1;
}
.img-lien {
    width: 100%;
    max-width: 400px;
    display: block;
    margin: 20px auto;
    cursor: pointer;
}