TITLE: Long Water — The World's Great Rivers FILE: 020-rivers-of-the-world.html === PROMPT (exact prompt used) === Create "Long Water — The World's Great Rivers", an elegant data-art visualization comparing the ten longest rivers. Use these commonly cited approximate lengths (label them "approx." and note that sources vary): Nile 6,650 km; Amazon 6,400; Yangtze 6,300; Mississippi–Missouri 6,275; Yenisei 5,539; Yellow River 5,464; Ob–Irtysh 5,410; Paraná 4,880; Congo 4,700; Amur 4,444. Each river is a flowing, meandering SVG ribbon whose length is proportional to its real length, flowing left to right with particles drifting along it like current. Palette: deep river blues and teals on pale limestone (#f3f1ec) — a sequential scale from #0b3d5c to #7fc8c2 — with thin ink labels. Typography: refined serif titles, small-caps continent labels, tabular numerals. Interaction: hover a river to highlight it and show a tooltip (length, continent, where it flows out); sort toggle (by length / by continent); unit toggle (km / miles); a "race" button where droplets travel every river at the same speed so the differences in length can be felt. Include an elegant legend and a short intro paragraph. Mobile: ribbons become vertical flows. SHARED REQUIREMENTS (apply to every page in this 100-page collection): 1. One standalone HTML5 file. All CSS inline in