.pwa-update-overlay {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  padding-bottom: max(24px, env(safe-area-inset-bottom, 0px));
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-sizing: border-box;
}

.pwa-update-overlay.is-open,
.pwa-update-overlay:not([hidden]) {
  display: flex;
}

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

.pwa-update-overlay__card {
  width: 100%;
  max-width: 400px;
  padding: 28px 24px;
  border-radius: 20px;
  background: #1e293b;
  color: #f8fafc;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

.pwa-update-overlay__icon {
  display: block;
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  border-radius: 16px;
  object-fit: cover;
}

.pwa-update-overlay__icon--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #334155;
  font-size: 32px;
  color: #94a3b8;
}

.pwa-update-overlay__title {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 700;
}

.pwa-update-overlay__text {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.5;
  color: #cbd5e1;
}

.pwa-update-overlay__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pwa-update-overlay__btn {
  width: 100%;
  padding: 14px 18px;
  border-radius: 12px;
  border: none;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  min-height: 48px;
}

.pwa-update-overlay__btn--primary {
  background: var(--pwa-theme-color, #2563eb);
  color: #fff;
}

.pwa-update-overlay__btn--primary:disabled {
  opacity: 0.7;
  cursor: wait;
}

.pwa-update-overlay__btn--secondary {
  background: transparent;
  color: #94a3b8;
  border: 1px solid #475569;
}

.pwa-update-overlay__btn--secondary:disabled {
  opacity: 0.5;
}

.pwa-cache-clear-btn {
  margin-top: 8px;
}