Simple Sunset

A smooth, flowing gradient shader that transitions diagonally from deep blue-navy in the lower left corner to warm coral-orange in the upper right corner. The gradient uses a 90-degree vertical angle with OKLCH color space interpolation, creating a perceptually smooth color transition through purple and pink midtones. Overlaid on this base gradient is a subtle sine wave pattern positioned at 35% vertical height, rendered in warm tan (#f4a261) with 56% opacity, creating gentle undulating horizontal waves with soft edges and low frequency. A fine simplex noise texture with reduced contrast (-0.6) and 15% opacity adds delicate organic variation and texture throughout, creating a slightly grainy, cloud-like quality. The entire composition is finished with a light film grain effect at full opacity with 20% strength, adding a subtle cinematic texture that enhances the atmospheric quality. The overall effect is soft, dreamy, and ethereal with warm-to-cool color harmony.