body {
    background-image: url(../images/fond_optik.jpg);
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100%;
}

#bloc_page {
    width: 90%;
    display: block;
    margin: auto;
}

header {
    display: flex;
    justify-content: space-between;
    margin: 5px;
    margin-bottom: 2%;
}

header img {
    width: 5%;
}

#banniere_image {
    margin: 5px;
    background-image: url(../images/oeil_bandeau.jpg);
    background-size: 100%;
    background-repeat: no-repeat;
    height: 200px;
    position: relative;
    border-radius: 10px;
    box-shadow: 0px 3px 10px #000000;
    margin-bottom: 2%;
}

#banniere_image div {
    position: absolute;
    bottom: 0px;
    width: 100%;
    border-radius: 0px 0px 10px 10px;
}

#banniere_image div {
    background-color: #881818cc;
    color: white;
}

body {
    display: inline-block;
}

main {
    background-image: url(../images/fond_jaune.png);
    column-count: 4;
    margin: 5px;
    margin-bottom: 2%;
}

main img {
    width: 20%;
}

footer {
    background-color: #83c6f3;
    display: flex;
    justify-content: space-around;
    font-family: Garamond;
    border-radius: 7% 0px;
}

footer h2 {
    text-transform: uppercase;
}

footer ul {
    list-style: none;
}

#lien {
    display: flex;
}

#lien a {
    text-decoration: none;
    color: rgb(180, 11, 11);
}