Hi ebin.m.m,

1, 2. Go to Theme Settings > Typography > Advanced. In this area, you can assign elements like screenshot https://prnt.sc/3HM6gcBcgZkI

.wd-nav-vertical.wd-nav-sticky>li:is(.wd-opened,:hover)>a

.wd-nav-vertical.wd-nav-sticky>li>a

.wd-sticky-nav .wd-sticky-nav-title

Please refer to our documentation https://xtemos.com/docs-topic/advanced-typography-settings/

3. I see the colors has been changed, let me know if you need further helps https://prnt.sc/YKDKyKRWNHov

Regards,