[UCSC-131] Standardize card elements

[bjcooper]

What does this do/fix?

This is a normalization pass to standardize card anatomy and behaviors across the various card block patterns and template parts:

• Cards may have an image, overline, title, body, and CTA
• The font size of each card element should be consistent across variations
• The spacing between card elements should be consistent across variations
• A card itself is not clickable and should have no suggestive hover or focus interactions
• Linked images, overlines, titles, anchors in the body, and CTAs may be clickable
  • When the image is linked, it should exhibit a subtle zoom effect when interacted with
  • Non-linked overlines and titles should be black; linked overlines and titles should be light blue and turn dark blue with a yellow underline on hover
  • Links in the body should be styled as normal site links
  • CTAs should use their specified preset button colors

QA

Links to relevant issues

• UCSC-131](https://moderntribe.atlassian.net/browse/UCSC-131)

Screenshots/video:

• https://www.loom.com/share/7c1de38da4034e6aa01164f59e9b01d2?sid=2d058cc6-d0b1-49b2-869b-995801ed7527

[bjcooper]

bump @Vinsanity