/*
With vw/vh, we can size elements to be relative to the size of the viewport.
The vw/vh units are interesting in that 1 unit reflects 1/100th the width of the viewport.
To make an element the full width of the viewport, for example, you'd set it to width:100vw.
*/
img { max-height:95vh; }
/*
With rem, we have support across almost all major browsers including IE9.
With vw and vh, however, we still have to wait awhile. Internet Explorer 9 is
the only browser out right now that supports these units.
*/