body{
    background-image: url(https://a-static.besthdwallpaper.com/amiral-luffy-one-piece-fond-d-ecran-2560x1600-71478_7.jpg) ;
    background-size: 100%;
    background-repeat: no-repeat;
}

.Intro{
    font-size: 35px;
    text-align: center;
    margin: 350px 200px;
    opacity: 0.75;
}
fond{
    background-color: #dcdcdc;
}

h1{
    text-align: center;
    font-size: 60px;
}

li{
    list-style-type: none;
}





.boutonmenuprincipal {
    background-color: #37e8e8;
    color: white;
    border: none;
    cursor: pointer;
    padding: 25px;
}

.boutonmenuprincipal:hover {
    background-color: #dcdcdc;
    transition: 500ms;
}

.dropdown {
    position: relative;
    float: right;
}

.dropdown-child {
    display: none;
    background-color: #f28c8c;
}
    
.dropdown-child a {
    color: white;
    padding: 20px;
    text-decoration: none;
    display: block;
}

.dropdown:hover .dropdown-child {
    display: block;
}

.dropdown-child a:hover{
    background-color: #0fc41e ;
}