#installAppPanel[hidden] { display: none; }
#installAppPanel {
  position: fixed; bottom: 20px; right: 20px; z-index: 90;
  box-sizing: border-box; width: min(360px, calc(100vw - 24px));
  padding: 18px; border: 1px solid #d0d7de; border-radius: 12px;
  background: #fff; color: #1f2328; box-shadow: 0 6px 24px #0002;
  font: 14px/1.5 'Segoe UI', system-ui, sans-serif;
}
#installAppPanel strong { font-size: 17px; }
#installAppPanel p { margin: 8px 0 14px; }
#installAppPanel > div { display: flex; flex-wrap: wrap; gap: 8px; }
#installAppPanel button { border: 1px solid #d0d7de; border-radius: 6px; padding: 9px 12px; background: #f6f8fa; color: #1f2328; cursor: pointer; font: inherit; }
#installAppPanel [data-install] { background: #0969da; color: white; border-color: #0969da; }
#installAppPanel button:focus-visible { outline: 3px solid #0969da; outline-offset: 2px; }
@media (max-width: 768px) { #installAppPanel { bottom: 76px; right: 12px; } }