Whimsical Halloween Moonlight Greeting

Professional Halloween greeting poster, vertical 9:16, dreamy high-gloss digital illustration. [Colors] Lilac to royal purple sky (#8E6BD6 to #4A2C8F), luminous pearl moonlight (#F3ECFF), pumpkin glow (#FF9430), cool white cloud highlights. [Layout] Airy vertical composition: script title across the top, a vast crescent moon sweeping diagonally through the middle, the hero ghost floating at its inner curve, a skyline of castle spires rising from cloud banks at the bottom, a small centered copy block in the last fifth. [Typography] Flowing calligraphic display title in white with soft outer glow, thin letterspaced Latin caps subtitle with decorative moon divider, delicate serif lines for the closing message. [Subject] Cute round ghost wearing a purple witch hat with a jack-o'-lantern badge and trailing ribbon, holding a lit pumpkin pail, gothic towers with warm lit windows emerging from clouds, bats circling the moon, cobweb in the upper corner with a dangling spider. [Lighting & Mood] Ethereal backlit moon glow, volumetric cloud light, deep purple recession; whimsical, fairytale, softly spooky. [Details] Star specks, wispy sheet folds, glowing lantern highlights, crescent craters, misty cloud edges, thin ornamental flourishes framing the subtitle.