p5.js-web-editor/client/styles/components/_nav.scss

.nav {
	width: 100%;
	padding: #{10 / $base-font-size}rem #{70 / $base-font-size}rem;
	padding-left: #{170 / $base-font-size}rem;
	display: flex;
	flex-direction: row;
	justify-content: space-between;
}

.nav__items-left, .nav__items-right {
	list-style: none;
	display: flex;
	flex-direction: row;
	justify-content: flex-end;
	padding: #{5 / $base-font-size}rem #{10 / $base-font-size}rem;
	border-bottom: 2px dashed;
}

.nav__item {
	& + & {
		margin-left: #{20 / $base-font-size}rem;
	}
	position: relative;
	&:hover .nav__dropdown {
		display: flex;
	}
}

.nav__dropdown {
	display: none;
	position: absolute;
	flex-direction: column;
	background-color: $light-background-color;
	padding: #{10 / $base-font-size}rem;
	left: #{-10 / $base-font-size}rem;
	border: 1px solid $ide-border-color;
	& li + li {
		margin-top: #{10 / $base-font-size}rem;
	}
	width: #{140 / $base-font-size}rem;
}