Popover API インタラクティブモーダルプレイグラウンド

Create an interactive web page that demonstrates the Popover API for modals. The page should feature multiple popover triggers with different modes (manual, auto), custom button styles, smooth open/close animations using CSS transitions, and a draggable popover example. Use modern CSS (light-dark color scheme, container queries) and include a reset button to close all popovers. The design should be centered, minimal, and responsive.