.ink-pwa-install-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1079;
  background: rgba(0, 0, 0, 0.42);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.ink-pwa-install-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.ink-pwa-install {
  position: fixed;
  left: 50%;
  bottom: max(16px, env(safe-area-inset-bottom));
  transform: translateX(-50%) translateY(calc(100% + 24px));
  z-index: 1080;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: min(420px, calc(100vw - 24px));
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(12, 18, 32, 0.94);
  border: 1px solid rgba(138, 92, 255, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(138, 92, 255, 0.15);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s cubic-bezier(0.4, 0.2, 0.2, 1), opacity 0.35s ease;
  box-sizing: border-box;
}

.ink-pwa-install.is-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.ink-pwa-install__head {
  display: contents;
}

.ink-pwa-install__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  flex-shrink: 0;
  object-fit: contain;
  background: #0f1115;
}

.ink-pwa-install__body {
  flex: 1;
  min-width: 0;
  text-align: left;
}

.ink-pwa-install__title {
  margin: 0 0 2px;
  font-size: 0.88rem;
  font-weight: 700;
  color: #eef2fb;
}

.ink-pwa-install__text {
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.4;
  color: #9aa3b2;
}

.ink-pwa-install__text .ink-pwa-install__share-icon {
  display: inline-flex;
  vertical-align: -0.15em;
  margin: 0 2px;
  color: #c4b5fd;
}

.ink-pwa-install__actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
}

.ink-pwa-install__btn {
  border: none;
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  min-height: 36px;
  -webkit-tap-highlight-color: transparent;
}

.ink-pwa-install__btn--primary {
  background: linear-gradient(135deg, rgba(138, 92, 255, 0.85), rgba(99, 102, 241, 0.85));
  color: #fff;
}

.ink-pwa-install__btn--ghost {
  background: transparent;
  color: #9aa3b2;
  padding: 4px 8px;
}

/* Mobile: volle Breite, kompakte Höhe (Bottom-Sheet, kein Vollbild) */
@media (max-width: 768px) {
  .ink-pwa-install {
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 100%;
    height: auto;
    transform: translateY(100%);
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding:
      20px
      max(20px, env(safe-area-inset-right))
      max(20px, env(safe-area-inset-bottom))
      max(20px, env(safe-area-inset-left));
    border-radius: 20px 20px 0 0;
    border: none;
    border-top: 1px solid rgba(138, 92, 255, 0.35);
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.4), 0 0 24px rgba(138, 92, 255, 0.12);
  }

  .ink-pwa-install.is-visible {
    transform: translateY(0);
  }

  .ink-pwa-install__head {
    display: flex;
    align-items: center;
    gap: 14px;
  }

  .ink-pwa-install__icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
  }

  .ink-pwa-install__body {
    flex: 1;
    text-align: left;
    min-width: 0;
  }

  .ink-pwa-install__title {
    font-size: 1.05rem;
    margin-bottom: 4px;
  }

  .ink-pwa-install__text {
    font-size: 0.875rem;
  }

  .ink-pwa-install__actions {
    flex-direction: column;
    width: 100%;
    gap: 8px;
    flex-shrink: 0;
  }

  .ink-pwa-install__btn {
    width: 100%;
    min-height: 44px;
    font-size: 0.875rem;
    border-radius: 12px;
  }

  .ink-pwa-install__btn--ghost {
    padding: 10px;
    min-height: 40px;
  }
}