I'm planning to travel with Arriva in Croatia and need to understand their luggage policy. Please find the rules regarding the number of bags allowed per passenger, the maximum weight for each bag, and any additional charges for extra or overweight luggage. Provide all these details.
Navigate directly to the 'Najčešća Pitanja' (Frequently Asked Questions) page: `https://www.arriva.com.hr/hr-hr/najcesce-postavljana-pitanja`. Scroll down the page to locate the 'Prtljaga' (Luggage) section. Extract the information regarding the number of allowed pieces of luggage per passenger. Extract the information regarding the maximum weight per piece of luggage. Extract details on any additional charges for extra luggage. Extract details on any additional charges for overweight luggage. Synthesize all extracted information into a concise answer.
State that each passenger is allowed two pieces of luggage. State that the maximum weight per piece of luggage is 20 kg. State that a fee is charged for each additional piece of luggage according to the valid price list. State that luggage exceeding 20 kg will also be charged an additional fee.