:root{color-scheme:light dark;font-family:system-ui,-apple-system,sans-serif}body{margin:0}.wrap{max-width:720px;margin:40px auto;padding:0 16px}.row{display:flex;gap:8px;margin:12px 0}.row input{flex:1;padding:8px;font:inherit}.row button{padding:8px 16px;cursor:pointer;font:inherit}video{width:100%;aspect-ratio:16 / 9;background:#000;border-radius:8px}.status{font:13px monospace;color:gray}.error{color:#d33;font-size:14px}.userbar{display:flex;justify-content:space-between;align-items:center;gap:8px}.userbar h1{margin:0}.user-id{font:13px monospace;margin-right:8px}section{margin:24px 0}section h2{font-size:16px;margin:0 0 4px}.hint pre{background:#80808026;padding:8px;border-radius:6px;overflow-x:auto;font-size:13px}