Castle Island with White Goose

Create a vertical 4:5 fantasy-realistic landscape illustration of {argument name="castle name" default="an ancient stone castle"} standing on a rocky island at the edge of a calm blue loch, connected to the mainland by a low arched stone bridge with exactly three visible arches. The castle should feel like a Scottish medieval fortress: tall gray stone walls, multiple chimneys, steep slate roofs, small turrets, narrow windows, and weathered masonry, perched on mossy rocks with shrubs and a few small trees around its base. In the foreground, show rugged gray boulders covered with green moss and grasses, with a small patch of purple wildflowers in the lower right; the water should be still and reflective with gentle ripples. Surround the scene with distant blue-green mountains on both sides and a bright, expansive sky filled with large soft cumulus clouds. High in the sky, include exactly {argument name="bird count" default="13"} birds flying in a loose curved formation: 12 small dark geese and 1 distinct white goose slightly separated on the right, visibly brighter than the others. Use luminous daylight, crisp detail, painterly realism, rich natural colors, a storybook travel-poster atmosphere, wide-angle composition, no text, no people, no watermark.