After-Hours Anomaly

male vocals suspenseful dim-lit ambient score for a quiet 10 pm office: soft air-conditioning hum recreated with low pads distant fluorescent buzz implied by thin high drones. Slow evolving synth textures trace fatigue and creeping dread with subtle rhythmic pulses like typing echoes. Occasional dissonant swells suggest the unseen anomaly getting closer while a muffled heartbeat-like bass throb rises near the midpoint then recedes leaving brittle high tones hanging in the dark.