An Instagram carousel ad image depicting a stylized concept of 'brain fog' for a cognitive supplement brand. Use a dark-to-grey gradient background for a modern, clean look that matches the branding of Ultrabrain, a premium nootropic. Display a detailed, half-foggy, half-clear brain icon in the center; the left side should appear misty and cloudy, representing 'brain fog,' while the right side should have an orange glow for clarity. Above the brain icon, include text in a sleek, modern sans-serif font that reads 'Feeling Cloudy or Forgetful?' in pure white. Below, in a smaller font size, add 'No more sluggish thinking' with a subtle glow effect. Use colors matching the Ultrabrain brand--black, grey gradient, and a vibrant orange. High resolution, with professional lighting and sharp detail, ensuring the image feels premium and aligns with Ultrabrain's branding.  --ar 4:5