What to wear smart casual and semi formal

[car10002]

Hi

Was wondering what the smart casual dress is for men for places like casinos and some restaurants both day and evening

1. Can black or dark colour jeans be worn with dressy top for evening and same in lighter colour for day

2. Instead of button shirt is turtle neck or high neck t shirt or shirt no button ok for day and evening

3. If you wear black or dark blue dress pants and blazer or jacket for night and same in lighter colours for day with a turtle or high neck or crew neck top no button ok for smart casual and semi formal if you used a bow tie

4 if you saved the shirt and tie for formal weddings and funerals and did smart casual in the above clothing is that ok