Please answer in Polish and create the entire UI prototype with Polish labels.
I am not attaching visual reference screenshots, because I do not want you to copy an existing style. Please create your own modern, clean and interactive UI concept for Rezerwacje7.
The design should feel like a mature SaaS admin panel for booking and service management, not like a generic dashboard template.
Style direction:
modern but practical
clean and professional
flat UI
no heavy shadows
no strong gradients
no oversized rounded cards
subtle blue-gray background
white or near-white sections
thin borders
compact buttons
readable tables
clear sidebar
interactive feeling, but not flashy
suitable for business owners using it every day
Use Polish interface text everywhere.