/* Chromebook (web) version only. */
.version-tag { margin-right: auto; opacity: 0.7; }
.install-btn {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  z-index: 20;
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}