.threeColumnBox{background:#f4f4f4;padding:32px}.threeColumnWrapper{display:flex;flex-wrap:wrap;gap:20px}.threeColumnBox{flex:1 1 calc(33.33% - 20px)}.threeColumnMainHeading{margin-bottom:32px;text-align:center}@media (max-width:991px){.threeColumnBox{flex:1 1 calc(50%% - 20px)}}@media (max-width:767px){.threeColumnBox{flex:1 1 100%}}
21:9	⚠  Lexical error on line 1: Unrecognized text.

  Erroneous area:
1: 50%% - 20px
^.....^ [postcss-calc]