CSS skeleton for Responsive Web Design

skeleton_rwd.css

/* Put your reset styles here */
/* Put styles for desktop and basic styles for all devices here */
body {
/* properties for body here */
}

/* medium display only */
@media (min-width: 481px) and (max-width:768px) {
  body {
    /* properties that only apply to tablets */
  }
}

/* small display only */
@media (max-width:480px) {
  body {
     /* properties that only apply to phones */
  }
}