#bookmarkBtn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 9999;
  width: 56px;
  height: 56px;
  padding: 0;
  border: none;
  border-radius: 16px;
  background: #2563eb;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  opacity: 0;
  transform: translateY(12px) scale(0.95);
  pointer-events: none;
  user-select: none;
}

#bookmarkBtn svg {
  width: 24px;
  height: 24px;
  stroke: #ffffff;
  transition: all 0.2s;
}

#bookmarkBtn:hover {
  background: #1d4ed8;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
  transform: translateY(-2px) scale(1.02);
}

#bookmarkBtn:active {
  transform: scale(0.92);
}

/* Плашка-подсказка */
#bookmarkTip {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px 12px 18px;
  background: #e9edf2;
  color: #1e293b;
  border-radius: 50px;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  opacity: 0;
  transform: translateY(12px);
  transition: 0.2s ease;
  cursor: pointer;
  user-select: none;
}

#bookmarkTip .hotkey {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.04);
  padding: 4px 10px 4px 8px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.3px;
}

#bookmarkTip .hotkey-icon {
  width: 16px;
  height: 16px;
  display: block;
  flex-shrink: 0;
}

/* Показываем на десктопе, скрываем в PWA */
@media (min-width: 769px) {
  #bookmarkBtn {
    display: flex !important;
  }
}

@media (display-mode: standalone) {
  #bookmarkBtn {
    display: none !important;
  }
}