img{
    object-fit:fill
}

div{
    margin-left: 1%;
    width: 900px;
    background-color: aliceblue;
    border-radius: 8px;
}
body{
    background-image: url(https://wallpaperaccess.com/full/1637466.jpg);
    background-repeat: no-repeat;
    background-size:cover;
    background-position:-300px ;
}
p,h1{
    text-align: center;
    
}
p{
    font-size: large;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

}
iframe{
    display: block;
    margin: 0 auto;
}
a{
    display:block; 
    margin: 0 auto;
    background-color: brown;
    border-radius: 8px;
    text-decoration: none;
    color: aliceblue;
    height: 25px;
    width: 75px;
}
#bouton{
    display:block; 
    text-align:center;
}