Centre cards for screens-width <= 660px (#8)
Centre cards for screens-width <= 660px (#8)

If the screen reaches a width of 660px, then we switch the flex-flow to
column and we centre the items.
StoiridhProject/stoiridhproject.github.io,StoiridhProject/stoiridhproject.github.io,StoiridhProject/stoiridhproject.github.io