Abstract atmospheric dark deep-blue background evoking a luminous forest at night. Subtle organic vertical structures like tree trunks and branches rendered as slightly darker navy blue lines within a deep midnight blue field. Soft drifting mist. A very few small warm golden points of light glowing faintly, scattered sparsely. Calm, deep, minimal, painterly and atmospheric — no fantasy, no photographic realism, no people, no obvious trees, purely abstract mood lighting. Dark navy #0B1F4A dominant.