A visionary female architect from a fictional Art Nouveau Barcelona stands on a skyscraping cantilevered balcony of her own impossible spiral tower at twilight, wearing tailored ivory linen suit with copper mechanical details, dark hair pinned with miniature brass gears, sketching compass in hand, gazing at cascading fairy lights illuminating her underwater city below, dramatic twilight lighting with deep violet and warm copper tones, rich details of flowing organic architecture and bioluminescent sea creatures, oil painting texture with digital precision, powerful intellectual three-quarter composition against fantastical underwater cityscape, 4k hyperdetailed digital art