#sd-version-switcher {
  position: fixed;
  left: 18px;
  bottom: 18px;
  z-index: 2147483000;
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(16, 75, 55, .16);
  border-radius: 999px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 10px 30px rgba(23, 67, 51, .18);
  font: 600 13px/1.2 Arial, sans-serif;
  backdrop-filter: blur(10px);
}
#sd-version-switcher button {
  min-height: 36px;
  padding: 8px 13px;
  border: 0;
  border-radius: 999px;
  color: #1d503d;
  background: transparent;
  cursor: pointer;
}
#sd-version-switcher button[aria-pressed="true"] {
  color: #fff;
  background: #277f5d;
}
#sd-version-switcher button:focus-visible {
  outline: 3px solid #f0b45b;
  outline-offset: 2px;
}
@media (max-width: 640px) {
  #sd-version-switcher { left: 10px; bottom: 10px; }
  #sd-version-switcher button { min-height: 42px; padding: 9px 12px; }
}