/*>2k*/
@media (max-width:2560px) {
    html {
        background-color:blue;
        font-size:24pt;
    }
    #dummy {
        color:rgba(255,255,255,255);
    }
}
/* 2k*/
@media  (max-width:19200px) {
    html {
        background-color:lightgreen;
        font-size:16pt;
    }
    #dummy {
        color:rgba(192,192,192,255);
    }
}
/**/
@media ( max-width:600px) {
    html {
        background-color: pink;
        font-size:16pt;
    }
    #dymmy {
        color:rgba(60,60,60,60)
    }
}