A elderly Japanese grandmother in a simple indigo hanfukukimono tends a small street food stall at a night festival, glowing red lanterns hanging above, golden takoyaki balls sizzling on the grill, children in colorful yukatas reaching for treats, soft purple twilight sky with firework sparks, hand-painted watercolor background with warm lantern glow and cool evening blue tones, cel animation aesthetic with crisp clean lines, nostalgic joyful mood, Studio Ghibli inspired artistic style