/* Desktop */
@import url("desktop.css");
/* Phone (portrait) */
@import url("phone.css") only screen and (max-width:320px);
/* Smart phone */
@import url("smartphone.css") only screen and (min-width:321px) and (max-width:480px);
/* Tablet */
@import url("tablet.css") only screen and (min-width:481px) and (max-width:768px);