Nautilus Fern Bioluminescent Mandala

A nautilus spiral of fern fronds unfurls as a biolum botanical mandala, contemplative and precise. Fronds are leathery with micro-hairs, dew beads opaline, veinlets subtly raised, central rachis smooth and waxed. Depth layering presents faint dew halos in the foreground, the spiral plane midframe, and a homogeneous midnight backdrop; focus anchors on the golden ratio center; medium DOF preserves frond edge fidelity across the core while outer tips fade gently. Illumination is cyan-teal rim along leaflet edges with emerald inner glow and sparse magenta pinpoints at dew intersections; grading is cool-emerald with deep neutral blacks and selective luminance mapping to keep highlights disciplined. Environment adds two stray spores and a single crossing tendril for scale. Camera is top-down with a normal FOV, centered radial composition, 16:9 crop with symmetrical margins. Style combines generative fractal geometry with photomacro texture scans and path-traced lighting. Reserve the top ~12% and both bottom corners as protected negative space consisting of soft, low-detail, background-matched areas; confine all luminous and detailed activity to the central field only.