Create a richly detailed, elegant Art Nouveau poster in portrait format based on the idea "A lemon, a half cut lemon, a glass of lemonade with an orange straw and a slice of lemon stuck on the glass' rim. Tropical beach background. The quote is "NATURAL COOLANT FOR HOT DAYS"". Interpret the quote as a symbolic visual metaphor with a central refined focal subject. Render the text in large ornate illuminated lettering with refined serif calligraphy, gilded edging, subtle filigree, and a luxurious antique-poster layout. Build the surrounding imagery so that every decorative element supports the meaning of the quote: include elegant symbolic objects, refined florals, candlelight, ornamental Lalique-style embellishment, and a sophisticated architectural or windowed background. Use a mature, romantic, luxurious mood rather than a childish one, with exquisite ornamental detail, layered textures, deep jewel colours, soft golden highlights, and a polished Art Nouveau aesthetic. Drawn with: highly detailed digital illustration, Art Nouveau elegance, illuminated manuscript typography, Lalique ornament, fine texture rendering, subtle Art Nouveau influence.