@media screen and (min-width:1200px) { 
    .contenedorgrande {display: flex;}
    .contenedormedio {display: none;}
    .contenedorfino {display: none;}
    .contenedorflexible {width:1200px;}
    .contenedorhomeinterno {width:1200px;}
    .cajagraficodeformulario {display: block;}
    .hoja {width:1200px;}
}

@media screen and (max-width:1199px) { 
    .contenedorgrande {display: none;}
    .contenedormedio {display: flex;}
    .contenedorfino {display: none;}
    .contenedorflexible {width:800px;}
    .contenedorhomeinterno {width:800px;}
    .cajagraficodeformulario {display: none;}
    .hoja {width:800px;}
  }

@media screen and (max-width:799px) { 
    .contenedorgrande {display: none;}
    .contenedormedio {display: none;}
    .contenedorfino {display: flex;}
    .contenedorflexible {width:400px;}
    .contenedorhomeinterno {width:400px;}
    .cajagraficodeformulario {display: none;}
    .hoja {width:400px;}
 
}