Link color contrast is too low in some parts of the website

[jaimergp]

Description

The link colors are sometimes not correctly overridden in darker backgrounds. For example, the highlighted news card:

Or the hover state in the footer (plus the Netlify backref):

It's even invisible with dark mode:

Tasks

• [ ] Review contrast for some of the green shades used in links, in general
• [ ] Account for dark backgrounds in all link states