Nayara Energy has spent the past four months navigating one of the most complicated sanction environments in its history, yet instead of retreating, the Rosneft-backed refiner is quietly re-wiring its entire crude-sourcing and fuel-export strategy. After EU sanctions in July forced its 400,000 b/d Vadinar refinery to slash throughput, and October’s US sanctions on Rosneft added further pressure, Nayara’s crude imports briefly collapsed to just 240,000 b/d, sourced from exclusively Russian suppliers. But by October and November, the…