Okay kiddo, so mid-luxury is when something is kind of fancy, but not too fancy. Like imagine going to a fancy restaurant where they have really good food and you have to dress up a little, but it's not as fancy as going to a really expensive restaurant where you have to wear a suit or a fancy dress.
In other words, mid-luxury means having nice things that are a little bit fancy, but not super expensive or luxurious. For example, a hotel might be considered mid-luxury if it has nice amenities like a pool and a restaurant, but it's not as opulent as a really fancy hotel with a spa and a private beach.
Overall, mid-luxury is just a way to describe things that are nice and upscale, but not too expensive or over-the-top fancy.