Minor improvements to UI and UX

[justingolden21]

I love your website (and I know many others use it quite often), however, I found some places where the UI could easily be greatly improved, with very little change necessary (in order to preserve the same color scheme and aesthetic you intended and users have become content with). These changes involve minor whitespace improvements, color improvements, and responsiveness, as well as setting the viewport width and height in a meta tag to greatly improve the mobile experience:

<meta name="viewport" content="width=device-width, initial-scale=1" />

Here is a side by side comparison of the current website and my version with the viewport set per the line above:

One of these is much easier to use than the other; if you take nothing else away from my pull request, please at minimum set the viewport with the line above : )

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Here is a quick preview of the minor improvements made to the CSS from the current version: