細かいことに気にしないで

N4 細かい komakai small, fine, detailed N4 気 ki spirit, mood, feeling, energy N5 ない nai there isn't, doesn't have

N2 細 sai / hoso.i, hoso.ru, koma.ka, koma.kai dainty, get thin, taper N5 気 ki, ke / ki spirit, mind, air

N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options