a vibrant cosmic portal with ethereal nebula effects, dynamic energy, and mesmerizing colors

nebula vibrant cosmic stellar vortex colorful stardust portal astral dreamy mesmerizing bokeh ethereal glow luminous dazzling effects mystical haze creative vision space swirl colors light visual surreal illusion serene chromatic graphic texture fantasy captivating atmospheric aesthetic swirling photography motion inspiration energy art background dynamic meditative abstract design smoke nature viewpoint ai generated