.submit-progress {
  position: fixed;
  bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  width: max-content !important;
  transform: translate(-50%, 20px);
  z-index: 3000;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: calc(100vw - 32px);
  padding: 12px 18px;
  border-radius: 12px;
  background: #1c1c1e;
  color: #fff;
  box-shadow: 0 8px 28px rgba(0, 0, 0, .28);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .22s, transform .22s, visibility .22s;
}

.submit-progress.show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.submit-spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  flex: 0 0 auto;
  box-sizing: border-box;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: submit-spin .7s linear infinite;
  vertical-align: -.12em;
}

button.is-submitting,
input.is-submitting {
  cursor: wait !important;
  opacity: .78;
  pointer-events: none;
}

html.form-submitting { cursor: progress; }

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

@media (prefers-reduced-motion: reduce) {
  .submit-spinner { animation-duration: 1.4s; }
  .submit-progress { transition: none; }
}

@media (max-width: 820px) {
  .submit-progress { bottom: calc(78px + env(safe-area-inset-bottom, 0px)); }
}