Serene Tropical Seawater Abstract

minimal abstract background of shallow tropical seawater seen from directly above, soft turquoise and pale aqua surface with gentle ripples and subtle caustic light patterns, milky white highlights fading into translucent blue-green water, smooth dreamy texture, no horizon, no objects, airy negative space, serene spa-like aesthetic, high-key natural sunlight, delicate watercolor-like gradients, clean stock-photo style