iframe{
    width: 100%;
    height: 100%;
    display: block; /* */
    /*max-width: 80vw; /* */ 
    /*max-height: 80vh;  /* */

}
#divv{
    width: 1152px;  
    height: 648px;
    max-width: 80vw; /* */ 
    max-height: 80vh;  /* */
    overflow: hidden; /* prevent wrapper from colapsing */
    /*background-color:green; /* */
}