:root{--sans-serif:'Proxima Nova',Arial,Helvetica,sans-serif;--monospace:'IBM Plex Mono',monospace}html[lang=ja-JP]{--sans-serif:'Noto Sans JP','Hiragino Kaku Gothic Pro',Meiryo,'MS PGothic',sans-serif}body{font-family:var(--sans-serif)}button,input,select,textarea{font-family:var(--sans-serif)}