.search-box {
  position: absolute;
  right: 0;
  top: 26px;
  background: #fff;
  padding: 2px;
  display: none;
  z-index: 999;
  width: 300px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}
.search-box.active {
  display: block;
}