@media only screen and (max-width:768px){body{margin:0;padding:0}.contenedor{width:100%;max-width:100%;margin:0 auto;padding:0 15px;box-sizing:border-box}}@media only screen and (max-width:768px){*{margin:0;padding:0;box-sizing:border-box}img,video{max-width:100%;height:auto}.clase-de-elemento{margin:0 auto;padding:0}}@media only screen and (max-width:768px){html,body{overflow-x:hidden;margin:0;padding:0;width:100%}header,.contenedor,.bloque{width:100%;max-width:100%;margin:0 auto;padding:0;box-sizing:border-box}img{max-width:100%;height:auto;display:block}}@media only screen and (max-width:768px){p,h1,h2,h3,h4,h5,h6{padding:0 15px;text-align:justify}.contenedor-texto{padding:10px 15px;margin:0 auto}}@media only screen and (max-width:768px){.seccion,.bloque{margin:0 auto;padding:0 15px}}@media only screen and (max-width:768px){.bloque,.contenedor,.seccion{margin-bottom:20px}}