The front sunroof drains are in the front corners of the sunroof channels.
With the sunroof open and looking through the top, you will see silver rails
on the sides of the sunroof opening.  The rails guide water to the front and
rear drains.  Look at the front corners for small round holes.

If the drains are blocked, water would probably leak through the sunshade
opening and the headliner would be damp.  Keep in mind that the hoses are
just rubber or plastic tubes, so be careful when poking around so you don't
disconnect the drain tube from the drain opening.  In my experience, the
drains rarely get clogged, unless you park with the sunroof open and leaves
and debris get stuck in there.  The drain tubes run down the A-pillars and
exit under the car behind the front wheels.

I would also check to make sure that the drain tube for the AC condenser is
not pulled out of the opening in the floor if you are finding that carpeting
is damp.  This happens fairly often when someone installs aftermarket
accessories like audio systems, remote starters, security systems, etc when
they route the wiring.  To check the AC condenser drain tube, pull the
front-top of the carpet back on the passenger side and look for a black
tube.  It should be pushed through a grommet in the floor board.