Build a single-page web toy: a glossy black 3D pill button that says "let's collaborate" sits in the middle of a clean white studio page. The cursor is a cartoon white-glove hand. When the cursor touches the button and moves away, thick sticky black goo strands stretch from the button to the hand like melted tar or spider web, sag and wobble with real physics, thin out the further you pull, then snap and drip back into the button. Pressing and dragging should pull even more strands. Soft studio shadows, realistic glossy highlights on the button. One HTML file, no external assets. It should feel satisfying the moment it loads.