Create an illustration of Kamado Tanjiro from the anime 'Demon Slayer: Kimetsu no Yaiba' in the style of Alphonse Mucha's Art Nouveau. The character should be depicted in a dynamic, battle-ready full-body pose, holding his iconic Nichirin Sword. Tanjiro should have his traditional black and green checkered haori flowing around him, with his serious and determined expression faithfully reproduced. His dark brown hair should be styled as it appears in the anime, with the distinctive red flame-like pattern on his forehead clearly visible. The background should feature intricate, flowing designs typical of Art Nouveau, incorporating natural elements such as vines and floral patterns that complement the character's strong yet graceful presence. The color palette should reflect the rich, earthy tones of Tanjiro’s costume, with subtle gold accents to enhance the overall composition --ar 9:16