.merge-menu {
  display: none;
  position: fixed;
  z-index: 1000;
  background-color: #2b2b2b;
  border: 1px solid #181818;
  border-radius: 3px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
  padding: 4px 0;
  min-width: 120px;
}

.merge-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.merge-menu .submenu-item {
  padding: 6px 12px;
  color: #eee;
  cursor: pointer;
  font-family: sans-serif;
  font-size: 13px;
}

.merge-menu .submenu-item:hover {
  background-color: #4772b3;
  color: #fff;
}