3153D mandala coloring page — lotus, star or feather patterns for adults

Generate this image now. Draw it directly - do not describe it, explain it, or ask questions.
Output size 2480x3508 pixels, A4 portrait, 300dpi, print-ready poster.
Create one finished adult mandala coloring page. If no size is supplied, use portrait A4, 210:297, with crisp print-quality linework.

CENTER SUBJECT: "【Center motif】"
Interpret this value visually as the central motif; never print it as text. If the subject line is missing or empty, use a lotus blossom and finish without questions.

PATTERN selected: "【Pattern】"
Interpret only the selected choice:
- Petals: Concentric layers of nested petals, leaves, floral arches, scallops, and small botanical ornaments.
- Geometric: Precisely aligned polygons, interlocking angular bands, rosettes, stepped shapes, and geometric compartments.
- Feathers: Symmetrical feather fans, outlined barbs, teardrop eyes, curved plumes, and layered feather-shaped compartments.
- Stars and moons: Repeated stars, crescent moons, celestial rosettes, outlined circles, and symmetrical orbital bands.
If this selection line is missing or empty, use Petals only.

DIFFICULTY selected: "【Difficulty】"
Interpret only the selected choice:
- Medium: Medium-density detail, balanced large and small compartments, and comfortably colorable inner spaces.
- Easy (large spaces): Fewer decorative rings, broad shapes, large enclosed compartments, and minimal tiny detail.
- Hard (dense): Many tightly organized rings, intricate micro-ornaments, and small but clearly separated colorable compartments.
If this selection line is missing or empty, use Medium only.

Make the chosen central subject recognizable inside a circular medallion. Build the surrounding ornament with precise eightfold radial symmetry; preserve the natural identity of the central subject if it cannot itself be radial. Fill most of the page with the mandala while retaining clean print-safe white margins.

Suggest dimensional layering only through overlapping outline geometry, nested contours, and changes in scale. Use pure black strokes on pure white. Slightly strengthen major contours while keeping inner details clear. Enclose all intended coloring compartments and avoid muddy intersections, accidental tangencies, and unusably tiny slivers.

Every compartment must remain unfilled white. No solid black shapes, colored regions, gray tones, hatching, stippled shading, gradients, cast shadows, text, letters, numbers, brands, signatures, or watermarks. Output the flat coloring page directly, without a table, frame, or mockup.
The choice names in this prompt are internal labels only; never print them as text.

[Final output format]
Output size 2480x3508 pixels, A4 portrait, 300dpi, print-ready poster.
This selected output format takes priority over any fixed canvas size or aspect ratio elsewhere in this template. Adapt the composition, text zones and margins to the selected canvas without stretching or cropping essential content. Device safe areas apply only when a device is selected. Never print these format instructions on the image.