Coding Challenge: https://twitter.com/jon_neal/status/823914801323708417

challenge.css

h { font-size: 2em; }

:matches(article, aside, nav, section) h { font-size: 1.5em; }

:matches(article, aside, nav, section) :matches(article, aside, nav, section) h { font-size: 1.17em; }

:matches(article, aside, nav, section) :matches(article, aside, nav, section) :matches(article, aside, nav, section) h { font-size: 1em; }

:matches(article, aside, nav, section) :matches(article, aside, nav, section) :matches(article, aside, nav, section) :matches(article, aside, nav, section) h { font-size: .83em; }

:matches(article, aside, nav, section) :matches(article, aside, nav, section) :matches(article, aside, nav, section) :matches(article, aside, nav, section) :matches(article, aside, nav, section) h { font-size: .67em; }

challenge.expected-result.css

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