Drifting Lights 8

A dark, minimalist shader effect displaying a subtle horizontal linear gradient transitioning from a slightly warmer dark blue-gray (#212538) on the left to a cooler, deeper dark navy (#171b1f) on the right. The gradient is smooth and uniform across the entire canvas. Overlaid on this base gradient is a barely perceptible rectangular coordinate grid pattern that creates a subtle geometric structure with faint horizontal and vertical lines, scaled at 3x intensity but maintaining very low visibility due to the dark background. The entire composition is finished with a fine film grain texture at 0.1 strength, adding a subtle noise pattern that creates a cinematic, slightly textured appearance. The effect has a calm, professional, and atmospheric quality with no bright highlights or sharp contrasts. The overall mood is dark, sophisticated, and minimalist with a technical, digital aesthetic.