cliffside observatory in  a ruined,techno-pessimist   fantasy cosmic megastructure at the end of time, masterpiece. Come up with an appropriate artstyle and color palette for this image.  Keep the prompt one paragraph or less, and use full sentences.  This image should be done in a post-apocalyptic steampunk style, with a sepia tone color palette and a rough, textured quality. The cliffside observatory overlooks a desolate landscape, with crumbling stone structures and rusted machinery scattered throughout. In the distance, a massive cosmic megastructure looms overhead, its once-majestic spires now twisted and broken. The sky above is filled with floating debris and strange, otherworldly light patterns, casting eerie shadows across the ruins below. Despite the bleakness of the scene, there is a sense of hope and resilience, as if the remnants of humanity have found a way to survive even in the face of utter destruction.