@media only screen and (max-width: 480px){
selector {
   property: value;
   property: value;
   property: value;
}
selector 2 {
   property: value;
   property: value;
   property: value;
}
}
@media screen and (min- width: 481px) and (max-device-width: 768px) {
selector {
   property: value;
   property: value;
   property: value;
}
selector 2 {
   property: value;
   property: value;
   property: value;
}
}

@media only screen and (min-width: 481px) 
{
selector {
   property: value;
   property: value;
   property: value;
}
selector 2 {
   property: value;
   property: value;
   property: value;
}
}