Matte nail polish had its big moment last year, and half-moon manicures have had a surge in popularity, so what's next? For yours truly, it's a two-toned manicure with matte half moons. The look is subtle enough to fly anywhere, but just unusual enough to warrant a double take. The design is one of dozens of choices available at Sephora Nail Studio Art + Lacquer, a new concept at select Sephora stores in New York and California. At these locations, XpresSpa nail techs provide everything from a quick polish change ($15) to intricate gem-studded nail art designs ($25-$75). To go the DIY route for this look, paint two coats of Nails Inc polish in Porchester Square after base coat, add a clear top coat, then detail each nail with Sephora by OPI matte top coat. It's retro yet modern all at once.