Work around Safari svg height bug
Work around Safari svg height bug

When we resize the wordmark svg using `max-width`, most browsers
allocate the height needed to maintain the aspect ratio within the
layout. However Safari keeps the full height used by the un-scaled SVG.

Happily, there is a workaround to set a `max-height: 100%` on the
element, which does cause it to render correctly:

https://bugs.webkit.org/show_bug.cgi?id=82489

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