A cinematic 8-second sci-fi teaser: A lone astronaut slowly drifting in the vast, dark silence of space, his oxygen tube suddenly snaps — his eyes widen in shock. Cold, high-Kelvin lighting with soft lens flare, subtle film grain, and deep shadows. Volumetric lighting from distant stars. His breath fogs the inside of his visor. Minimal soundtrack — just a faint heartbeat and radio static. At the final second, the screen cuts to black as the title “OXYGEN” fades in, spaced typography dissolving into silence.