/* Busy / double-click prevention visuals */
button.is-action-busy,
input.is-action-busy,
a.btn.is-action-busy,
a.is-action-busy {
  opacity: 0.7 !important;
  cursor: wait !important;
  pointer-events: none !important;
  position: relative;
}
button.is-action-busy::after,
a.btn.is-action-busy::after {
  content: '';
  width: 12px;
  height: 12px;
  margin-left: 8px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  display: inline-block;
  vertical-align: -1px;
  animation: pda-spin .7s linear infinite;
}
@keyframes pda-spin {
  to { transform: rotate(360deg); }
}