A split-screen comparison layout: the left panel displays a vibrant 2020s modern drone video of the tranquil Bikini lagoon; the right panel shows a graded historical black-and-white archival photograph from 1946 showing a battleship anchored in the lagoon prior to nuclear testing, enclosed within clean digital interface borders.. Spatial layout: Слева статичный кадр современной лагуны, справа ретро-кадр архивной хроники с силуэтом военного корабля... Context markers: historical archive photographs and film reels juxtaposed with modern digital view. The complete visual composition—including all primary subjects, secondary supporting elements, boundaries, and environmental contours—must sit comfortably inside the canvas with generous clean white negative space visible on all four sides (target 8-12% margins, minimum 6%). The entire visual assembly must occupy maximum 80% canvas height and 84% canvas width. Nothing touches or crosses any canvas edge. Do not crop the primary subject. Clean isolated 2D explainer composition against pure white/off-white background. hand-drawn 2D explainer cartoon illustration, confident clean black outlines, flat cel-style colors, simplified readable forms, soft minimal shading, clear focal hierarchy, clean educational YouTube illustration, no photorealism, no 3D rendering, no typography, no text, no watermarks
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