samples/poster_jazz.json

{
  "canvas_settings": {
    "aspect_ratio": "1:1",
    "ambient_lighting": "Low-key nocturnal lighting with a soft cyan-blue glow rising from the lower center, fading into near-black navy at the top; the saxophone silhouette is rim-lit by this cool backlight.",
    "image_style": "Minimalist square concert-poster design with smooth digital gradients, crisp centered typography, and a single high-contrast photographic-style instrument silhouette."
  },
  "layers": [
    {
      "description": "Full-square background formed by a smooth deep navy-to-black vertical gradient, subtly brighter blue around the lower center and nearly black along the upper edge; no visible texture beyond the soft tonal falloff.",
      "coordinates": "cx: 0.500, cy: 0.500, w: 1.000, h: 1.000",
      "hierarchy_and_relation": "Base layer beneath all typography, ornament, and instrument imagery; its lower-center glow silhouettes the saxophone.",
      "color_specs": [
        "#020A18",
        "#06152A",
        "#0A2848",
        "#123E63"
      ]
    },
    {
      "description": "Large centered event title 'Blue Hour' in an elegant high-contrast serif typeface, pale blue-white, with very large letterforms and generous spacing; the title occupies the upper-middle area on a single centered baseline and is horizontally centered over the saxophone and lower information block.",
      "coordinates": "cx: 0.500, cy: 0.250, w: 0.760, h: 0.145",
      "hierarchy_and_relation": "Topmost typography over the dark gradient, centered above the saxophone and visually dominant over all other text.",
      "color_specs": [
        "#D8E8F7",
        "#BFD8EF"
      ]
    },
    {
      "description": "Small uppercase subtitle 'A JAZZ NIGHT' centered below the main title, set in widely tracked sans-serif letters; a thin horizontal rule appears on each side, aligned to the subtitle baseline and extending outward symmetrically toward the left and right margins.",
      "coordinates": "cx: 0.500, cy: 0.345, w: 0.520, h: 0.030",
      "hierarchy_and_relation": "Placed directly beneath the title and above the saxophone, with the flanking rules framing the subtitle without touching the letters.",
      "color_specs": [
        "#8FB4D2",
        "#5F88AA"
      ]
    },
    {
      "description": "Vertical saxophone silhouette in dark navy-black, shown in side profile facing left with the bell flaring at the lower left; curved neck, mouthpiece, body keys, and bell are visible, with a narrow cool-blue highlight tracing the right edge and lower rim.",
      "coordinates": "cx: 0.493, cy: 0.574, w: 0.285, h: 0.445",
      "hierarchy_and_relation": "Central photographic-style object over the gradient; it sits below the title block and behind the lower event-information typography, with its lower portion partially occluded by the date row.",
      "color_specs": [
        "#020B18",
        "#06152A",
        "#0B2742",
        "#2E6F9D"
      ]
    },
    {
      "description": "Thin circular blue outline behind the saxophone, centered around the instrument body; the ring is delicate, mostly visible along the left and lower arc, and partially hidden by the saxophone silhouette.",
      "coordinates": "cx: 0.499, cy: 0.574, w: 0.350, h: 0.350",
      "hierarchy_and_relation": "Decorative midground element between the gradient background and saxophone; the saxophone occludes portions of the ring while the ring remains visible around the left and bottom edges.",
      "color_specs": [
        "#174A73",
        "#0D3153"
      ]
    },
    {
      "description": "Centered date line 'Friday, October 3' in a clean light sans-serif typeface, pale blue-gray, positioned below the saxophone bell and body.",
      "coordinates": "cx: 0.500, cy: 0.786, w: 0.430, h: 0.040",
      "hierarchy_and_relation": "Foreground text below the instrument, centered over the lower gradient and above the time-and-venue row.",
      "color_specs": [
        "#C7D9EA",
        "#9FB9D0"
      ]
    },
    {
      "description": "Centered lower information row with '8 PM' at left and 'The Lantern Room' at right, both in small widely tracked uppercase sans-serif lettering; a thin horizontal rule separates this row from the date above and aligns with the left and right text endpoints.",
      "coordinates": "cx: 0.500, cy: 0.835, w: 0.430, h: 0.055",
      "hierarchy_and_relation": "Foreground information layer beneath the date line; the two text occurrences share a baseline and are separated by open space, while the rule spans behind them horizontally.",
      "color_specs": [
        "#A8C2D9",
        "#6F93B1",
        "#315776"
      ]
    },
    {
      "description": "Small bottom decorative mark centered near the lower edge: a thin vertical stem with a tiny blue dot above it and a short horizontal base line.",
      "coordinates": "cx: 0.500, cy: 0.923, w: 0.060, h: 0.055",
      "hierarchy_and_relation": "Topmost minimal ornament below the event information, isolated against the dark background and aligned to the poster center axis.",
      "color_specs": [
        "#1E5A86",
        "#0B2D4A"
      ]
    }
  ]
}