Responsive React grid system built with styled-system, with support for styled components and emotion (previously called grid-styled). The Box component handles width, margin and padding. All @rebass/grid components use styled system for style props, which pick up values from a theme and allow for responsive styles to be passed as array values. Sets width, where numbers 0-1 are percentage values, larger numbers are pixel values, and strings are raw CSS values with units. Pass an array to set...