/* Contenido principal de la app */
main {
  width: 100vw;
  height: 100vh;
  /*background: linear-gradient(to right, #2a5298, #1e3c72);*/
  display: flex;
/*  align-items: center;
  justify-content: center;*/
/*  color: white;
  font-size: 2rem;*/
}

/* Pantalla de aviso */
.rotate-warning {
    display: none;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #111;
    color: #fff;
    font-size: 3rem;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
    z-index: 9999;
}

/* Mostrar aviso SOLO en portrait */
@media screen and (orientation: portrait) {
    .rotate-warning {
      display: flex;
    }
    main {
      display: none;
    }
}