CSS Test: max-width: calc() on blocks

50% - 3px

25% - 3px + 25%

25% - 3px + 12.5% * 2

25% - 3px + 12.5%*2

25% - 3px + 2*12.5%

25% - 3px + 2 * 12.5%

30% + 20%