/* Extra small devices (phones, 600px and down) */
@media only screen and (max-width: 600px) {

    .img50{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img75{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img100{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img200{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img250{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img300{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img350{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img400{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img450{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img500{width:95%;margin-left:auto!important;margin-right:auto!important;}
    .img550{width:95%;margin-left:auto!important;margin-right:auto!important;}

}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {

}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {

}

/* Large devices (laptops/desktops, 992px and up) */
@media only screen and (min-width: 992px) {

}

/* Extra large devices (large laptops and desktops, 1200px and up) */
@media only screen and (min-width: 1200px) {

}