Tile revamp

[cjyabraham]

Implementing some of the ideas here, this attempts to consolidate some of the tile styles across the site:

• Adds animation consistently to all tiles that link to a piece of content (case studies now has them)
• Creates a new is-style-border group style for tiles that don't link out to a piece of content (example at the top of this page)
• Tweaks the is-style-box-shadow group style to make the border less pronounced and so more appropriate to linking out to a piece of content (used on this page)
• Standardizes the css for item tiles by using mixins
• Added shadow to homepage intro boxes
• Tweak style of project boxes on homepage
• Updates Goldie on homepage
• Closes gap between background fill and border on homepage boxes at the rounded corners:

Dev instance

[GarethAcidWorks]

Reviewing and making recommendations. Here is a quick talk through on some thoughts so far. https://www.loom.com/share/162a4c8cbe0d47608252de999282cb1f?sid=cb09300d-6a4f-4ca5-b88e-9384ef32079e