#banner{
    background: url(../img/black.jpg);
    width: 100%;
    height: 80vh;
    background-size: cover;
    background-position: center;
    position: relative;
    
}

#banner .titulo1{
    width: 100%;
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    /*background-color: rgba(0, 0, 0, 0.5); */
    color: white;
    font-size: 40px;
}
#banner .titulo2{
    display: none;
    width: 100%;
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    /*background-color: rgba(0, 0, 0, 0.5); */
    color: white;
    font-size: 40px;
}
@media screen and (max-width: 600px){
    #banner{
    background: url(../img/banner-principal1.png);
    width: 100%;
    height: 100vh;
    background-size: cover;
    background-position: center;
    position: relative;
    
}
}