Cinematic Sparta Helmet Poster

Create a vertical cinematic historical poster for {argument name="ancient city" default="SPARTA"}. Use a dark, minimalist composition with a deep burgundy-black textured parchment background, subtle vignette, and gritty film-grain finish. At the top center, place one large title line reading {argument name="headline text" default="SPARTA"} in widely spaced, elegant carved Roman serif capitals, aged ivory color. Directly beneath it, add one small subtitle line reading {argument name="subtitle text" default="LACONIA · PELOPONNESE"} in tiny spaced capitals with centered dot separators. In the lower center, show exactly one ancient Spartan bronze Corinthian helmet, weathered and rust-red, facing forward, with black hollow eye openings, a narrow nose guard, worn metallic rim highlights, and exactly one tall dark red horsehair crest rising from the top. The helmet sits in dramatic low-key lighting, casting a long black shadow to the lower right. At the very bottom, add one small italic tagline line reading {argument name="tagline" default="Explore with Visionaria — the first Cinematic Imagination App"} in aged ivory. Keep the design sparse and symmetrical, with large empty negative space between the title and helmet, no people, no extra objects, no logos, and no modern elements. Use a premium ancient-history movie-poster style, moody chiaroscuro lighting, realistic texture, and a 2:3 vertical poster aspect ratio.