CSS Responsive Standard

/*==========  Mobile First Method  ==========*/


/* Custom, Extra Small Devices, Phones, iPhone Retina */

@media only screen and (min-width: 320px) and (max-width: 767px) {}


/* Small Devices, Tablets */

@media only screen and (min-width: 768px) and (max-width: 1199px) {}


/* Large Devices, Wide Screens */

@media only screen and (min-width: 1200px) and (max-width: 1919px) {}


/* Retina Devices, Wide Screens */

@media only screen and (min-width: 1920px) {}