Very similar situation with my partner and I, except we use budgeting software - I manage my own personal budget and our "joint" budget separately. My partner isn't interested in using the software for her own expenses, which is fine.
We can both see how much money is allocated to everything, if there's anything one of us wants to spend money on that would be a shared thing - we budget for it.
Same for us.
We both have our own checking and savings accounts, plus a joint checking and a joint savings one.
We each put a certain amount every month to the joint account, based on our revenue (I earn more so I contribute more).
Everything is then paid from the joint account.
For big expenses, we both decide how to spread the money in different categories.
We both have money left on our own accounts to use however we want.
I would say this works quite well for us, and allow us to plan and budget for our expenses (I mainly do it, she doesn't really care about the software, but she can access it and see how much we have for each category).
We can both see how much money is allocated to everything, if there's anything one of us wants to spend money on that would be a shared thing - we budget for it.