#crimson-install-prompt {
  position: fixed;
  z-index: 2147483647;
  top: max(12px, env(safe-area-inset-top));
  left: 12px;
  right: 12px;
  max-width: 420px;
  max-height: 70vh;
  overflow: auto;
  margin: 0 auto;
  padding: 16px;
  box-sizing: border-box;
  border: 1px solid #ddd;
  border-radius: 16px;
  background: #fff;
  color: #202124;
  box-shadow: 0 4px 24px #0003;
  font: 16px/1.5 system-ui, sans-serif;
}
#crimson-install-prompt p { margin: 8px 0 12px; }
#crimson-install-prompt .actions { display: flex; gap: 12px; flex-wrap: wrap; }
#crimson-install-prompt button {
  min-height: 44px;
  padding: 8px 16px;
  border: 1px solid #b71c1c;
  border-radius: 8px;
  background: #fff;
  color: #b71c1c;
  font: inherit;
  cursor: pointer;
}
#crimson-install-prompt .install { background: #b71c1c; color: #fff; }
#crimson-install-prompt button:focus-visible { outline: 3px solid #1565c0; outline-offset: 3px; }