User:Irukaza/common.css

.dropdown {
  display: inline-block;
  position: relative;
}
.dropdown .btn {
  display: inline-block;
}
.dropdown .content {
  position: relative;
  display: none;
  box-shadow: 0 0 4px #dedede;
  margin-top: 0.5rem;
}
.dropdown .content:before {
  content: '';
  position: absolute;
  background-color: #fff;
  width: 0.5rem;
  height: 0.5rem;
  left: 50%;
  top: -0.25rem;
  transform: translateX(-50%) rotate(45deg);
  z-index: 0;
  box-shadow: 0 0 4px #dedede;
}
.dropdown .content .inner {
  position: relative;
  background-color: #fff;
  padding: 0.2rem 0.4rem;
  z-index: 1;
}
.dropdown .content .inner ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}
.dropdown .content .inner ul li {
  display: block;
  padding: 0.2rem;
}
.dropdown .content .inner ul li:hover {
  background-color: #f0f8ff;
}
.dropdown:hover .content {
  display: block;
}