.sf-update-overlay {
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.72);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.sf-update-overlay[hidden] {
  display: none !important;
}

.sf-update-overlay__card {
  width: min(420px, 100%);
  padding: 28px 24px;
  border-radius: 24px;
  background: var(--color-shell-surface, #fff);
  color: var(--color-text, #111827);
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.28);
  text-align: center;
}

.sf-update-overlay__spinner {
  display: inline-block;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border: 4px solid rgba(148, 163, 184, 0.35);
  border-top-color: var(--color-primary, #111827);
  border-radius: 999px;
  animation: sf-update-spin 0.85s linear infinite;
}

.sf-update-overlay__eyebrow {
  display: block;
  margin-bottom: 6px;
  color: var(--color-text-muted, #64748b);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sf-update-overlay__title {
  margin: 0 0 8px;
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  line-height: 1.2;
}

.sf-update-overlay__message {
  margin: 0;
  color: var(--color-text-muted, #64748b);
  font-size: 0.98rem;
  line-height: 1.55;
}

.sf-update-banner {
  position: fixed;
  right: 16px;
  bottom: 16px;
  left: 16px;
  z-index: 2147482999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  max-width: 680px;
  margin-inline: auto;
  padding: 14px 16px;
  border-radius: 18px;
  background: var(--color-shell-surface, #fff);
  color: var(--color-text, #111827);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.2);
}

.sf-update-banner[hidden] {
  display: none !important;
}

.sf-update-banner__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.45;
}

.sf-update-banner__actions {
  display: flex;
  flex-shrink: 0;
  gap: 8px;
}

.sf-update-banner__button {
  border: 0;
  border-radius: 999px;
  padding: 9px 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.sf-update-banner__button--primary {
  background: var(--color-primary, #111827);
  color: #fff;
}

.sf-update-banner__button--secondary {
  background: rgba(148, 163, 184, 0.18);
  color: inherit;
}

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

@media (max-width: 520px) {
  .sf-update-banner {
    align-items: stretch;
    flex-direction: column;
  }

  .sf-update-banner__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sf-update-overlay__spinner {
    animation-duration: 1.8s;
  }
}