In terms of media queries, the breakdown is:
/* Smartphones */ @media (max-width: 480px) { ... } /* Smartphones to Tablets */ @media (min-width: 481px) and (max-width: 767px) { ... } /* Tablets */ @media (min-width: 768px) and (max-width: 959px) { ... } /* Desktop */ @media (min-width: 960px) and (max-width: 1199px) { ... } /* Large Display */ @media (min-width: 1200px) { ... }