Create a premium cinematic travel poster featuring an ultra-detailed photorealistic isometric miniature diorama of {argument name="destination" default="Santorini"}, {argument name="country" default="Greece"}. The canvas is vertical 4:5 with a clean warm off-white studio background and generous empty space at the top for typography. Center the scene as a floating collectible-scale island sculpture with steep dark volcanic cliffs, a circular caldera bay of deep blue water, and a soft natural shadow underneath. Build the miniature with dense whitewashed Cycladic houses stacked along the cliffs, narrow stairways, winding paths, terraces, small courtyards, flowering bougainvillea, beige stone walls, and bright cobalt-blue accents. Include exactly 6 prominent blue-domed churches, exactly 3 traditional windmills, and exactly 8 visible boats: 4 sailboats spread across the bay, 1 small motorboat in open water, and 3 small boats near the harbor. The water should be realistic with subtle ripples, turquoise shallows near the harbor, and darker navy tones in the center. Use warm late-afternoon Mediterranean sunlight, crisp shadows, high depth of detail, realistic miniature scale, and a polished luxury travel-advertisement finish. Typography: at the top, set a large elegant high-contrast serif title reading {argument name="headline text" default="SANTORINI"} in dark navy with wide letter spacing; beneath it, smaller spaced uppercase text reading {argument name="subheadline text" default="GREECE"}; below that, a thin gold divider line with a small centered diamond; then a tiny uppercase caption reading {argument name="caption text" default="AEGEAN ISLAND DIORAMA • 2026"}. Keep the composition clean, symmetrical, refined, and poster-ready, with no people, no logos, no watermark, and no extra text.