@media only screen and (max-width: 479px) {
    #block-block-19,
    #block-block-20,
    #block-block-21,
    #block-block-63,
    #block-block-64,
    #block-block-65 {
        float: left;
        width: 100%;
    }

    #block-block-19 img,
    #block-block-20 img,
    #block-block-21 img,
    #block-block-63 img,
    #block-block-64 img,
    #block-block-65 img {
        width: 100% !Important;
        height: auto !Important;
    }

}

@media only screen and (min-width: 480px) and (max-width: 599px) {
    #block-block-19,
    #block-block-20,
    #block-block-21,
    #block-block-63,
    #block-block-64,
    #block-block-65  {
        float: left;
        width: 440px;
        margin-bottom: 20px !important;
    }

    #block-block-19 img,
    #block-block-20 img,
    #block-block-21 img,
    #block-block-63 img,
    #block-block-64 img,
    #block-block-65 img  {
        width: 100% !Important;
        height: auto !Important;
    }
}

@media only screen and (min-width: 600px) and (max-width: 959px) {

    #block-block-19,
    #block-block-20,
    #block-block-21,
    #block-block-63,
    #block-block-64,
    #block-block-65  {
        float: left;
        width: 260px;
        margin-bottom: 20px !important;
    }

    #block-block-19 img,
    #block-block-20 img,
    #block-block-21 img,
    #block-block-63 img,
    #block-block-64 img,
    #block-block-65 img  {
        width: 100% !Important;
        height: auto !Important;
    }

}

@media only screen and (min-width: 960px) {

    #block-block-19,
    #block-block-20,
    #block-block-21,
    #block-block-63,
    #block-block-64,
    #block-block-65  {
        float: left;
        width: 280px;
        margin-bottom: 20px !important;
    }

    #block-block-19 img,
    #block-block-20 img,
    #block-block-21 img,
    #block-block-63 img,
    #block-block-64 img,
    #block-block-65 img  {
        width: 100% !Important;
        height: auto !Important;
    }

}