h1
{
    text-align: center;
    color: rgb(112, 245, 255);
    size: 195%;
    text-decoration: underline;
}

body
{
    background-image: url(https://images.wallpapersden.com/image/download/batman-8k-minimal-art_bW5rbm6UmZqaraWkpJRsZmZrrWllZWY.jpg);
    background-repeat: no-repeat;
    background-size: cover;
}

h3
{
    text-align: center;
    color: rgb(172, 205, 255);
    margin-bottom: 5%;
}

h2
{
    text-align: center;
    color: rgb(173, 215, 255);
    margin-bottom: 8%;
}

img.batman4
{
    margin-right: 25%;
    margin-left: 25%;
}

img.double-face
{
    margin-left: 30%;
    margin-right: 30%;
}

.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;
}