Stylesheet active.

stylesheet.css has been cloned and saved as css/style.css. Furthermore, a link has been estabilished between index.html and this stylesheet.
By now, it only creates some styles on general selectors, much like reset style sheets do.
stylesheed committed
smartphone portrait mode

white text on a red background
smartphone landscape mode.

black text on orange background.
tablet portrait mode

white text on blue background
tablet landscape mode

white text on teal background
desktop portrait mode

black text on green background
desktop landscape mode

white text on purple background
Modified index.html <article>
modified css dimensions to device dimensions on stylesheet