Html css refactor

linuxgeminirequested to merge
linuxgemini/tinytracer:html-css-refactor into master

This MR updates the main page with better indented HTML and more stable™ CSS between browsers both on mobile and desktop.

This change adds a sub flexbox for the information section, so that the output can be wider compared to the infobox. This change also significantly reduced the usage of static values (ie max-width: 850px;).

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