Luminous Pastel Gradient Background

abstract soft mesh gradient background, full-frame diffuse color fields, oversized blurred color zones, RANDOM COLOR and RANDOM COLOR in the upper left, pale RANDOM COLOR and RANDOM COLOR in the center, soft RANDOM COLOR and RANDOM COLOR on the right, warm RANDOM COLOR and luminous RANDOM COLOR in the lower right, extremely smooth airbrushed transitions, subtle diagonal color flow, luminous pastel colors, clean minimal 2D background, edge-to-edge color