body{
    margin:0;

    background-image:url("background.png");
    background-size:100%;
    background-repeat:no-repeat;
    background-color:#00dfe6;

    /* deixa alto pra poder scrollar */
    min-height:200vh;

    overflow-x:hidden;
}

/* botão */
.enter{
    position:absolute;

    top:70px;
    left:50%;

    transform:translateX(-50%);

    transition:0.25s cubic-bezier(.34,1.56,.64,1);
}

.enter img{
    width:320px;
    display:block;
}

/* efeito hover */
.enter:hover{
    transform:translateX(-50%) scale(1.08);
}