figure.highlight .code-copy-btn {
  position: absolute;
  top: 6px;
  right: 8px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  color: #888;
  background: transparent;
  border: none;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease;
}

figure.highlight:hover .code-copy-btn {
  opacity: 1;
}

figure.highlight .code-copy-btn:hover {
  color: #333;
}

figure.highlight .code-copy-btn .code-copy-icon {
  width: 14px;
  height: 14px;
}

figure.highlight .code-copy-btn .code-copy-icon-check {
  display: none;
}

figure.highlight .code-copy-btn.copied {
  color: #2e9e6f;
  opacity: 1;
}

figure.highlight .code-copy-btn.copied .code-copy-icon-copy {
  display: none;
}

figure.highlight .code-copy-btn.copied .code-copy-icon-check {
  display: block;
}

.dark-theme figure.highlight .code-copy-btn {
  color: #aaa;
}

.dark-theme figure.highlight .code-copy-btn:hover {
  color: #eee;
}

.dark-theme figure.highlight .code-copy-btn.copied {
  color: #4ecb99;
}