Aqua-blue abstract vertical gradient background

A cool, airy abstract background where pale aqua and mint gently rise from the bottom of the frame into softer sky-leaning blue and hints of silvery cyan near the top, the whole image appearing as a tranquil sheet of diffused light seen through frosted glass with no shapes or edges at all. The color flow leans from bottom upward, as though a cool glow is drifting vertically, but the transitions are so smooth that no part resolves into a band or horizon line, only into a slow vertical gradient. The middle and upper central area form a broad, calm region of nearly even aqua-blue, providing a wide, undisturbed expanse with extremely gentle tonal shifts. Slightly off-center toward the lower right, a subtle, brighter pool of turquoise and light aqua coalesces as a soft focal zone, its brightness only a bit higher than the surroundings so it attracts the eye without any sharp boundary. Toward the far left and top edges, the hues cool slightly toward a more bluish-cyan, hinting at depth as if the color mist recedes there, while the bottom corners keep a slightly deeper, more saturated aqua that fades seamlessly into the midtones. Texture is all but absent, limited to very broad, low-frequency softness changes, preserving a minimal, smooth, volumetric gradient atmosphere free of patterns, streaks, or visual noise.```