.pwa-panel {
  position: fixed;
  inset-inline: max(1rem, env(safe-area-inset-left)) max(1rem, env(safe-area-inset-right));
  inset-block-end: max(1rem, env(safe-area-inset-bottom));
  z-index: 1100;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  inline-size: min(42rem, calc(100% - 2rem));
  margin-inline: auto;
  padding: 1rem 1.1rem;
  border: 1px solid var(--al-border, rgba(255,255,255,.14));
  border-radius: var(--al-radius-md, 1rem);
  background: var(--al-surface, #111620);
  color: var(--al-text, #f7f9fc);
  box-shadow: 0 1.2rem 4rem rgba(0,0,0,.28);
}
.pwa-panel[hidden] { display: none; }
.pwa-panel__copy { min-inline-size: 0; }
.pwa-panel__title { margin: 0 0 .2rem; font-weight: 700; }
.pwa-panel__message { margin: 0; color: var(--al-text-secondary, #c8d0dc); }
.pwa-panel__actions { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: flex-end; }
.pwa-panel__button {
  min-block-size: 2.6rem;
  padding: .65rem .9rem;
  border: 1px solid var(--al-border-strong, rgba(255,255,255,.25));
  border-radius: var(--al-radius-xs, .6rem);
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}
.pwa-panel__button--primary {
  border-color: var(--al-accent, #2f8cff);
  background: var(--al-accent, #2f8cff);
  color: var(--al-text-on-accent, #fff);
}
.pwa-panel__button:focus-visible { outline: 3px solid var(--al-focus, #7db5ff); outline-offset: 2px; }
.pwa-panel[data-tone="offline"] { border-inline-start: 4px solid var(--al-warning, #d89b2b); }
.pwa-panel[data-tone="update"] { border-inline-start: 4px solid var(--al-accent, #2f8cff); }
.pwa-panel[data-tone="success"] { border-inline-start: 4px solid var(--al-success, #2eaa72); }
@media (max-width: 42rem) {
  .pwa-panel { grid-template-columns: 1fr; }
  .pwa-panel__actions { justify-content: stretch; }
  .pwa-panel__button { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) {
  .pwa-panel, .pwa-panel * { scroll-behavior: auto !important; transition: none !important; }
}
@media print { .pwa-panel { display: none !important; } }