/* Button lock — disabled + spinner during async submission */

.btn--locked {
  opacity: 0.65;
  cursor: not-allowed !important;
  pointer-events: none;
}

.btn--loading {
  position: relative;
}

.btn--loading::after {
  content: '';
  display: inline-block;
  width: 13px;
  height: 13px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.65s linear infinite;
  margin-left: 8px;
  vertical-align: middle;
  flex-shrink: 0;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}