Nicety (noun)

1. A delicate or subtle feature, detail, or distinction.
2. A small and precise item, action, or decision.

Origin:

From nice + -ty, from the sense of "the quality of being nice".

Examples:

1. She paid close attention to the niceties of etiquette when hosting the dinner party.
2. The designer was known for his attention to the smallest niceties of his craft.
3. He appreciated the niceties of fine wine, such as the bouquet and flavor profile.
4. The new software was designed to handle the niceties of complex financial calculations.
5. The baker was praised for the niceties of her presentation, such as the intricate frosting designs.