Spun – Front size ? – menu

Hello
first sorry for my english language, i’m a french boy and new for programmation.
I’ve installed WordPress and Spun theme.

I’va managed to do what i wanted but i have a problem with front size.
Here are the two problem on the page :
http://fragmentsintimes.com/WordPress3/portfolio/
and
http://fragmentsintimes.com/WordPress3/infos-2/

For the first one page , as you can see the three links “Françoise Barbaras” “Lionel Dupas” and “Karl Grelet” are too small and a can’t manage to make them bigger.

here is what i have change :
.entry-content,
.entry-summary {
font-family: Baskerville, “Playfair Display”, “Times New Roman”, serif;
font-size: 30px;
/* TAILLE DU TEXTE DANS LES PAGES “ACCUEIL” “INFO” ET “PORTFOLIO” */
font-style: normal;
font-weight: 300;
margin: 1.5em 0 0;

but if i change the front size, all the fronts change in all pages and they will be too big in http://fragmentsintimes.com/WordPress3/infos-2/ (for example)

The second problem is the roll over menu on “Portfolio” on the right of the page. The front size is too small too ?

Is there anybody to explain what i have do wrong ?

thank in advance
Best regards
karl