Long description

Line 1: at the rate media only screen and open parenthesis max hyphen width colon 480 p x close parenthesis open curly brace ellipsis close curly brace. at the rate media is labeled Defines this as media query, only is labeled Only use this style if both conditions are true, screen is labeled Device has to be a screen, max hyphen width colon 480 p x is labeled Use this line style if width of viewport is no wider than 480 pixels, and ellipsis is labeled C S S rules to use if device matches these conditions.