.btn
{
    height: 100px;
    width: 100px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    right: 20px;
    bottom: 20px;
}

img.icone
{
    width: 50px;
    cursor: pointer;
}

body
{
    background-color: rgb(210, 210, 210);
}

img.bravo
{
    display: block;
    margin-right: auto;
    margin-left: auto;
    width: 60%;
}