.modal{
    display: none;
}

.modal--ativo{
    background-color: rgba(0,0,0,.33);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
}