.dg-pwa-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  z-index: 10500;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}
.dg-pwa-backdrop.dg-pwa-visible {
  opacity: 1;
  pointer-events: auto;
}
.dg-pwa-sheet {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 10501;
  background: var(--dg-surface);
  color: var(--dg-text);
  border-top: 1px solid var(--dg-border);
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -8px 30px rgba(0,0,0,0.35);
  padding: 20px 20px calc(20px + env(safe-area-inset-bottom));
  transform: translateY(100%);
  transition: transform .3s cubic-bezier(.32,.72,0,1);
  max-width: 480px;
  margin: 0 auto;
}
.dg-pwa-backdrop.dg-pwa-visible .dg-pwa-sheet { transform: translateY(0); }
.dg-pwa-handle {
  width: 40px; height: 4px; border-radius: 4px;
  background: var(--dg-border); margin: 0 auto 16px;
}
.dg-pwa-icon {
  width: 64px; height: 64px; border-radius: 16px; display: block;
  margin: 0 auto 14px; box-shadow: 0 4px 14px rgba(0,0,0,0.25);
}
.dg-pwa-title {
  text-align: center; font-size: 1.05rem; font-weight: 700;
  margin-bottom: 8px; color: var(--dg-text);
}
.dg-pwa-text {
  text-align: center; font-size: 0.9rem; color: var(--dg-muted);
  line-height: 1.45; margin-bottom: 18px;
}
.dg-pwa-text .dg-pwa-share-icon {
  display: inline-block; vertical-align: -4px; width: 18px; height: 18px; margin: 0 2px;
}
.dg-pwa-actions { display: flex; gap: 10px; }
.dg-pwa-btn {
  flex: 1; border: none; border-radius: 12px; padding: 12px 16px;
  font-weight: 600; font-size: 0.92rem; cursor: pointer;
}
.dg-pwa-btn-primary { background: #F97316; color: #fff; }
.dg-pwa-btn-primary:active { opacity: .85; }
.dg-pwa-btn-secondary {
  background: transparent; color: var(--dg-muted); border: 1px solid var(--dg-border);
}
@media (min-width: 900px) { .dg-pwa-backdrop { display: none !important; } }