～ても構(かま)わないIt doesn't matter if, I don't mind

ても構(かま)わない is often used to express that something 'doesn't matter', or that the speaker 'doesn't mind'. This structure is a combination of ても (with verbs and い-Adjectives), or でも (with nouns and な-Adjectives) grouped with the negative conjugation of the う - Verb 構(かま)う, which means 'to brace'. Literally, this expression can be thought of as being similar to 'to not be uptight'. However, it is almost always simply used to convey that there is no issue with something.

ても構(かま)わない may be used with any type of word that appears in its ても or でも conjugation form.

• 君(きみ)がお金(かね)を出(だ)すなら、ピザでも寿司(すし)でも何(なに)を頼(たの)んでも構(かま)わないよ。

  If you are going to pay, I don't mind whether you order pizza, sushi, or anything else.
• 運転手(うんてんしゅ)さん、遅(おそ)くても構(かま)いませんので、安全(あんぜん)運転(うんてん)でお願(ねが)いします。

  Chauffeur, I don't care if it's slower, please drive safely.
• 仕事(しごと)はどんなに大変(たいへん)でも構(かま)いません、仕事(しごと)が出来(でき)ればうれしいです。

  I don't care how busy work is, I am happy so long as I can do my job.
• アルバイト募集中(ぼしゅうちゅう)。未経験者(みけいけんしゃ)でも構(かま)いません。

  Hiring part time workers. It doesn't matter if you are not experienced.

Fun Fact

構(かま)う is usually translated as 'to brace', but the kanji 構(かま) often has the nuance of 'to posture', or 'to pose' (into some type of strong/resistant shape). In the ても構(かま)わない grammar structure, this translates as (A) simply being something that will not cause the speaker to 'posture', 'position', or 'pose' themselves in a resistant way.