.serial-box {
  cursor: pointer;
  user-select: all;
  transition: background 0.15s, color 0.15s;
}

.serial-box:hover,
.serial-box:focus-visible {
  background: #d8f0de;
  outline: 3px solid rgba(22, 101, 43, 0.18);
  outline-offset: 2px;
}

.serial-box.copied {
  background: #16652b;
  color: #fff;
  user-select: none;
}

.public-copy-fallback {
  position: fixed;
  top: 0;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}