Fixes <hr> width

• Updated <a> to use --color (primary color)
• Updated <section> to handle overflow content
• Updated <section><img> and <article><img> to with within their containers by default
• Added a showcase section to README

• Improved dropdown menu hovering and positioning

https://unpkg.com/mvp.css@1.6.0

• Added [hidden] styling to hide hidden elements
• Updated alternate table rows to use --color-accent for a more branded look
• Updated <table> to use display: block and removed overflow styling
• Updated font variable to font-family
• Updated <pre>, <code> and <samp> styling to have proper padding and recognize indented content
• Updated line-height to be a number instead of a percentage

https://unpkg.com/mvp.css@1.5.1

• Added browser default :focus styling back in for better tabbed navigation
• Updated <a> styling to use display: inline-block for better focus outlines on buttons
• Added <label> styling for checkbox and radio elements
• Added striped <table>

• Updated <pre> styling to use pre-line for better line breaks
• Added hover styling to <details><summary> tags