Change the style of cards.

[Prerna-Goel]

for #93
currently, all cards are in rectangle shape, with pointed corners
we can have cards modified to have round corners
along with that, changing font-size, font-color, font-style for each card

[lisa761]

Hi @Prerna-Goel, great idea! Can you show us what the cards would look like with rounded corners? To be able to see how they would be better. And how would you like to change the fonts? Can you elaborate on which font size, color and style you would prefer and why you think that would be better?