Create a premium abstract textured website background, landscape 16:9 composition, no text, no interface, no logo, no watermark. A deep near-black upper half with ample quiet negative space for a centered headline. Across the lower half, a disciplined arrangement of vertical rectangular light columns of uneven stepped heights, blue cobalt and icy periwinkle transitioning into soft rose and warm white near the bottom edge. Dense tactile fine stochastic noise and photographic film grain visibly integrated into the light itself, rich smooth tonal transitions underneath the tiny irregular grains. Flat frontal composition, luminous but restrained, refined digital print texture, not a 3D city, no buildings. Side columns rise higher and middle columns lower to frame central text space. Full bleed edge to edge. One standalone image, no grid or contact sheet.