.cc-tool-back {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10000;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
  background: rgba(5, 13, 17, .9);
  box-shadow: 0 8px 28px rgba(0, 0, 0, .3);
  color: #f4f8f6;
  font: 700 13px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-decoration: none;
  backdrop-filter: blur(12px);
}

.cc-tool-back:hover,
.cc-tool-back:focus-visible {
  border-color: #38dc89;
  color: #38dc89;
  outline: none;
}

@media (max-width: 640px) {
  .cc-tool-back { top: 10px; right: 10px; padding: 9px 12px; font-size: 12px; }
}