.zoom{
    /* Aumentamos la anchura y altura durante 2 segundos */
    transition: width 0.5s, height 0.5s, transform 0.5s;
    -moz-transition: width 0.5s, height 0.5s, -moz-transform 0.5s;
    -webkit-transition: width 0.5s, height 0.5s, -webkit-transform 0.5s;
    -o-transition: width 0.5s, height 0.5s,-o-transform 0.5s;
}
.zoom:hover{
    /* tranformamos el elemento al pasar el mouse por encima al doble de
       su tamaño con scale(2). */
    transform : scale(1.1);
    -moz-transform : scale(1.1);      /* Firefox */
    -webkit-transform : scale(1.1);   /* Chrome - Safari */
    -o-transform : scale(1.1);        /* Opera */
    z-index: 99;
}



#sent{
    width: 80%;
    margin-left: 10%;
    color: white;
    font-size: 30px;
    font-weight: bolder;
    text-align: center;
    margin-top: -10%;
    margin-bottom: 10%; 
}

@media (max-width: 600px) {
 
 #sent{
    width: 80%;
    margin-left: 10%; 
    color: white;
    font-size: 25px;
    font-weight: bolder;
    text-align: center;
    margin-top: -10%;
    margin-bottom: 10%; 
}
  
}