[Intro to HTML, CSS, JS](https://docs.google.com/file/d/1tEnwxdIzMJeTEtjuNhiBWflaXVfngg7bnIGU2UUz-ZUz18lsTGc7sfd_zofW/edit?usp=sharing)
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Use the [Responsive Web Design Testing Tool](http://mattkersley.com/responsive/) to see how your site looks on phone screens.