Firefly Double-Helix Spiral in Clearing

A double-helix of fireflies spirals upward in a silent night clearing, serene and weightless. Bodies are matte chitin with tiny translucent abdomens, wings thin and cellophane-like, air holds a few dust motes and haze. Depth layering is spare foreground haze, the helix in the midplane, and a uniform charcoal woodland void; focus sits on the midsection crossover of the helix; medium DOF maintains bead-like firefly clarity through the central twist while outer strands soften. Light is warm chartreuse biolum in pulses that ladder along the helix with gentle comet tails; grading is cool-blue base with warm-lime highlights, restrained bloom, and crisp blacks. Environment includes three faint grass blades at mid-height and a light mist band. Camera is eye-level with a short-tele FOV, centered vertical composition with helix tapering top to bottom inside a 16:9 portrait-safe frame. Style is long-exposure composite fused with particle-sim CGI and minimal grain. 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.