How to Break Up My 11-Day Thailand Trip (Bangkok, Chiang Mai, Phuket, Krabi)

I’m planning an 11-day trip to Thailand in May 2025 for my honeymoon, flying into Bangkok, then heading to Chiang Mai, Phuket, and eventually flying back home. I’m trying to figure out how to best break up the days between these destinations, and whether I should go to Krabi or just stick with Phuket.

My questions are:

How many days should I spend in each location? I want a good balance of city life, culture, nature, and beaches.
Should I go to Krabi or just stay in Phuket? I like the idea of a mix of both, but not sure if it's worth the extra travel time.
Any suggestions or recommendations for how to make the most of these destinations would be super appreciated!