.Logo img {
    width: 30%;
    height: auto;
    padding: 14px;
}

.Qui {
    margin: 30px;
    font-size: 45px;
}

.partenaire {
    margin: 30px;
    font-size: 45px;
}

.certif {
    margin: 30px;
    font-size: 45px;
}

.presentation {
    margin: 30px;
    font-size: 45px;

}

.text {
    display: block;
    padding: 5px;
    text-align: left;
    font-size: 15px;
    vertical-align: top;
    margin: 30px;
}

.textdeux {
    display: block;
    padding: 5px;
    text-align: left;
    font-size: 15px;
    vertical-align: top;
    margin: 30px;
}

.ad img {
    position: center;
    width: 8%;
    padding: 2px;
    margin: 50px;
}

#orange {
    width: 6%;
}

.dernier-logo img {
    image-resolution: from-image;
    width: 10%;
}

.ytb iframe {
    padding: 5px;
    font-size: 15px;
    margin: 22px;
}

nav.menu ul li {

    display: inline-block;
    padding:5px;
    font-size: 17px;

}

nav.menu ul li.btn a{

    color: azure;
    background-color: black;
    text-decoration: none;

}

nav.menu ul li.btn:hover a{

    color: black;
    background-color: azure;
    transition: 0.3s all;

}