How do i increase font size on topic list page ?

[NoobDeveloper]

Here the font of topic titles are way too low. How do i increase it ?
https://marathikavita.co.in/marathi-prem-kavita/

[Herman's Mixen]

index.css

Koodi [Valitse] Laajenna


body
{
background: #101010/*#0f1420*/ url(../images/custom/body_bg.jpg) 50% 0 repeat-x fixed;
font: 12px/130% Tahoma, "Arial", "Helvetica", sans-serif;
margin: 0;
padding: 0;
}