Site looks partly wrong on mobile browsers

Desktop site: looks ok
screenshot

Firefox mobile: distance between site title and body too small
screenshot

Opera mobile: font in body is white instead of black, slightly wrong kind of blue in menu text
screenshot

How can I fix these?
Thank you.

• This topic was modified 2 years, 2 months ago by nofish2. Reason: fixed links
• This topic was modified 2 years, 2 months ago by nofish2.
• This topic was modified 2 years, 2 months ago by nofish2.

The page I need help with: [log in to see the link]