Ghi chú viết tay chân thực trong sổ tay chấm bi

A realistic photo of an open dotted notebook lying flat on a [casual desk setting], filled with dense handwritten study notes in [blue] ballpoint pen. The handwriting is casual and slightly messy, featuring natural imperfections, crossed-out words, and underlined headings. Shot from slightly above with an iPhone, illuminated by soft natural daylight from a window, no flash.