Wordpress Basic Nav Menu (Multi Level)

nav-menu.css

/* Reset list styles */
.nav-menu, .nav-menu ul {
  padding: 0;
  z-index: 99999;
  list-style: none;
}
/* Used flex to remove list item gaps */
.nav-menu {
  display: flex;
}
.nav-menu a {
  display: block;
  color: #2f3640;
  padding: 8px 16px;
  white-space: nowrap;
  text-decoration: none;
}
.nav-menu li:hover > a {
  background-color: #dcdde1;
}
.nav-menu li {
  position: relative;
}
/* Positioned beneath the hovered list item */
.nav-menu .sub-menu {
  position: absolute;
  display: none;
  left: 0;
  min-width: 100%;
  background-color: #f5f6fa;
}
/* Positioned right next to the hovered list item */
.nav-menu .sub-menu .sub-menu {
  top: 0;
  left: 100%;
}
.nav-menu li:hover > .sub-menu,
.nav-menu li li:hover > .sub-menu {
  display: block;
}
.nav-menu .menu-item-has-children:after {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 32px;
  height: 100%;
  font-size: 8px;
  color: #2f3640;
  content: '▶';
}
/* Parent list item spacing for the caret */
.nav-menu .menu-item-has-children > a {
  padding: 8px 32px 8px 16px;
}
.nav-menu .menu-item-has-children:hover:after {
  content: '◀';
}
/* Horizontal list item hover caret */
.nav-menu > .menu-item-has-children:after {
  content: '▼';
}
.nav-menu > .menu-item-has-children:hover:after {
  content: '▲';
}