Design a YouTube thumbnail for a video about {{topic}}. No people or faces: one object or scene does the work. The only text: "{{thumbnail_text}}". Render the text exactly as written, spelled correctly, nothing else. Hierarchy: the object is the first read, the words second, and there is no third element. Layout: 16:9, 1280 x 720 px, on the rule of thirds. The focal object fills the right two-thirds, cropped boldly so it nearly touches the edges. The words sit in the left third on one or two lines, about 40% of the frame width, flush left, with breathing room. Keep the bottom-right corner clear, where the video length appears. It must still read at 160 x 90 px, the size it shows in search on a phone. Type: one heavy condensed grotesk, tight line spacing, white or near-black. If contrast is low, put a solid color bar behind the words instead of an outline or glow. Color: two high-contrast colors such as saturated yellow #FFD23F and deep teal #0B3C49, plus the object's real colors. The background is a flat color or a softly blurred real setting. Imagery: the object as a real photo in hard directional light, with a crisp shadow, shot slightly from above, sharp edges. Avoid: red arrows and circles, shocked faces, more than one focal point, extra words, garbled letters, glows and outlines on text, lens flares, sparkles, glossy plastic 3D, busy backgrounds. Format: 16:9.