Santa Mug in Front of a Decorated Christmas Tree

Photorealistic close-up of a glossy emerald-green ceramic mug held by a hand, featuring a vintage Santa Claus illustration wrapped around the side. The mug’s surface reflects warm twinkling lights from a richly decorated Christmas tree in the softly blurred background, with red and gold baubles, candy canes, ribbons, and pine needles. Steam rises subtly from the mug, suggesting hot cocoa or tea. Use shallow depth of field so the Santa mug is in sharp focus while the tree creates a magical festive atmosphere. Warm golden lighting, natural skin tones, and subtle glaze texture on the mug (glossy finish, slight speckling). Composition should feel cozy and celebratory, with the mug slightly left of center and the tree filling the right side.