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Create an amateur smartphone photo of an open notebook lying flat on a desk, its pages filled with handwritten notes on the topic described in the user request. Write in casual, slightly messy black ballpoint pen, as if for personal use only: uneven letter sizes, a gentle rightward slant that wavers, a few crossed-out words, underlined headings, cramped margin additions, and small arrows connecting ideas. Vary ink pressure so some strokes sit darker where the pen paused, and let the ruled lines be loosely obeyed rather than perfectly followed. Shoot from slightly above at a hand-held angle, with soft natural daylight coming from a window to one side, no flash, faint page shadow in the gutter, and a subtle paper curl at the corners. Surround the notebook with a believable casual desk: the edge of a mug, a pen resting nearby, a hint of wood grain — all secondary and softly out of focus. Keep the paper texture, ink bleed, and color completely true to an unedited phone photo. Do not add printed typography, perfect calligraphy, watermarks, logos, hands, or studio lighting. User request: study notes on the water cycle with a sketched diagram of rain and evaporation