:root {
  --pruevia-shell-primary: #0f766e;
  --pruevia-shell-surface: #ffffff;
  --pruevia-shell-text: #0f172a;
  --pruevia-shell-focus: #2563eb;
  --pruevia-shell-border: #0f766e;
  --pruevia-shell-shadow: #0f172a26;
  --pruevia-shell-button-radius: 8px;
}
.app-update[hidden] { display: none; }
.app-update {
  position: fixed;
  z-index: 3000;
  inset-inline: 20px;
  bottom: calc(92px + env(safe-area-inset-bottom, 0px));
  max-width: 560px;
  margin-inline: auto;
  padding: 16px;
  border: 1px solid var(--pruevia-shell-border);
  border-radius: 12px;
  background: var(--pruevia-shell-surface);
  color: var(--pruevia-shell-text);
  box-shadow: 0 6px 24px var(--pruevia-shell-shadow);
  font: 14px/1.5 Inter, system-ui, sans-serif;
}
.app-update p { margin: 4px 0 12px; }
.app-update small { display: block; margin-bottom: 12px; }
.app-update-actions { display: flex; gap: 10px; }
.app-update button {
  min-height: 52px;
  padding: 12px 16px;
  border: 1px solid var(--pruevia-shell-primary);
  border-radius: var(--pruevia-shell-button-radius);
  color: var(--pruevia-shell-primary);
  background: #ffffff;
  font: inherit;
  cursor: pointer;
}
#app-update-action { background: var(--pruevia-shell-primary); color: #ffffff; }
.app-update button:focus-visible { outline: 3px solid var(--pruevia-shell-focus); outline-offset: 3px; }
.app-update button:disabled { opacity: .6; cursor: progress; }
@media (max-width: 560px) {
  .app-update-actions { flex-direction: column; }
  .app-update button { width: 100%; }
}
@media (prefers-color-scheme: dark) {
  :root { --pruevia-shell-surface: #111827; --pruevia-shell-text: #ffffff; --pruevia-shell-border: #5eead4; }
}