Build a cohort retention heatmap with Tailwind CSS: rows are signup weeks, columns are weeks since signup, and each cell shows the retention percentage shaded from light to dark accent by value. Keep the first column at full intensity, label rows with the cohort date and size, and add a legend from 0% to 100%. Cells should be square-ish with thin gaps and a tooltip with the exact figure.
提示词保持英文原文——直接粘贴进 Claude、Cursor、v0 或任何 AI 编程工具即可使用。