.titulos {
    animation-duration: 5s;
    animation-name: titulo;
}

@keyframes titulo{
    from{
        opacity: 0;
    }
    to{
        opacity: 1;
    }
}

nav{
    animation-duration: 2s;
    animation-name: nav;


}
@keyframes nav{
    from{
        transform: translate3d(0, -100%, 0);
        opacity: 0;
    }
    to{
        transform: translate3d(0, 0, 0);
        opacity: 1;
    }
}