h1
{
    text-align: center;
    color: rgb(162, 0, 255);
    font-size: 200%;
    margin-bottom: 3%;
    text-decoration: underline;
}

body
{
    background-image: url(https://s2.best-wallpaper.net/wallpaper/2880x1800/1904/Batman-superhero-art-picture-black-background_2880x1800.jpg);
    background-repeat: no-repeat;
    background-size: cover;
}

h3
{
    text-align: center;
    color: rgb(153, 0, 255);
    font-size: 185%;
    margin-bottom: 4%;
}

h2
{
    text-align: center;
    color: rgb(0, 225, 255);
    font-size: 185%;
}

img.batman6
{
    margin-right: 20%;
    margin-left: 20%;
    margin-bottom: 3%;
}

img.batman66
{
    margin-left: 35%;
    margin-right: 35%;
}

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

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