Splash page styling fixes

[victorlin]

preview

Description of proposed changes

Styling fixes as a follow-up to #901 + #902

Related issue(s)

849

Checklist

• [x] Checks pass
• [x] ~Check if changes affect the resource index JSON revision~

[victorlin]

@jameshadfield I implemented your suggestion from the other PRs, feel free to tweak my commit or add anything else directly.