/* Extra small devices (phones, less than 768px) */
/* No media query since this is the default in Bootstrap */
  
/* Small devices (tablets, 768px and up) */
@media (min-width: 768px) { ... }
  
/* Medium devices (desktops, 992px and up) */
@media (min-width: 992px) { ... }
  
/* Large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) { ... }

@media only screen { } /* Define mobile styles */
  
@media only screen and (max-width: 40em) { } /* max-width 640px, mobile-only styles */
  
@media only screen and (min-width: 40.063em) { } /* min-width 641px, medium screens */
  
@media only screen and (min-width: 40.063em) and (max-width: 64em) { } /* min-width 641px and max-width 1024px */
  
@media only screen and (min-width: 64.063em) { } /* min-width 1025px, large screens */
  
@media only screen and (min-width: 64.063em) and (max-width: 90em) { } /* min-width 1025px and max-width 1440px */
  
@media only screen and (min-width: 90.063em) { } /* min-width 1441px, xlarge screens */
  
@media only screen and (min-width: 90.063em) and (max-width: 120em) { } /* min-width 1441px and max-width 1920px */
  
@media only screen and (min-width: 120.063em) { } /* min-width 1921px, xxlarge screens */
  						

/* Small */
@media (min-width: 35.5em) { ... }
  
/* Medium */
@media (min-width: 48em) { ... }
  
/* Large */
@media (min-width: 64em) { ... }
  
/* X-Large */
@media (min-width: 80em) { ... }