.dropdown {
  position: relative;
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  float: left;
  min-width: 160px;
  padding: 8px;
  margin: 0;
  font-size: 14px;
  text-align: left;
  list-style: none;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #d4d4d4;
  border-radius: 0;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}
.dropdown-menu.dropdown-menu--md {
  min-width: 320px;
  max-width: 340px;
}
.dropdown-menu.dropdown-menu--lg {
  min-width: 480px;
}
.dropdown-menu.dropdown-menu--right {
  left: auto;
  right: 0;
}
.dropdown-menu.dropdown-menu--right:before {
  left: auto;
  right: 10px;
}
.dropdown-menu.dropdown-menu--right:after {
  left: auto;
  right: 10px;
}
.dropdown-menu:before {
  content: '';
  position: absolute;
  top: -12px;
  left: 10px;
  border: 6px solid transparent;
  border-bottom-color: #d4d4d4;
}
.dropdown-menu:after {
  content: '';
  position: absolute;
  top: -11px;
  left: 10px;
  border: 6px solid transparent;
  border-bottom-color: #fff;
}
.open > .dropdown-menu {
  display: block;
}