.bg__hero{
  background-image: url('../img/content/working.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  height: 100vh;
}

.mask{
  background-color: rgba(10, 21, 70, 0.9);
  height: 100vh;
  width: 100%;
}

@media (max-width: 576px){
  .bg__hero{
    height: 50vh;
  }

  .mask{
    background-color: rgba(10, 21, 70, 0.9);
    height: 50vh;
    width: 100%;
  }
  
}

.seccion__4{
  background-image: url('../img/content/working.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  height: 400px;
}

.seccion__4 .mask{
  height: 400px;
}