The Incredibly Accessible Form

This is an attempt to show how to make a form as accessible as possible to assistive technology users, partially inspired by: https://github.com/gdkraus/accessible-modal-dialog. I know that there's a form in the modal demo, but I felt the need to make a "more complete" one, with more elements and a few more functionalities, all of them listed above.

Features

1. Basic input fields with label, instructions and error feedback;
2. Basic buttons with visual and textual guidance/feedback;
3. Made in compliance with WAI-ARIA, WCAG;
4. 

Validation

This form was tested using the following configurations and tools:

1. JAWS 17.0.2211 64-bit in //BROWSER TESTED// for Windows 10:
2. VoiceOver
3. ChromeVox 53.0.2779.0 in Chrome 51.0.2704.103 for Windows 10: 
4. WebAIM Contrast Checker (http://webaim.org/resources/contrastchecker/)