html5up_editorial/css/layout/_menu.scss

///
/// Editorial by HTML5 UP
/// html5up.net | @ajlkn
/// Free for personal and commercial use under the CCA 3.0 license (html5up.net/license)
///

/* Menu */

	#menu {
		ul {
			@include vendor('user-select', 'none');
			color: _palette(fg-bold);
			font-family: _font(family-heading);
			font-weight: _font(weight-heading-alt);
			letter-spacing: _font(kerning-heading);
			list-style: none;
			margin-bottom: 0;
			padding: 0;
			text-transform: uppercase;

			a, span {
				border-bottom: 0;
				color: inherit;
				cursor: pointer;
				display: block;
				font-size: 0.9em;
				padding: 0.625em 0;

				&:hover {
					color: _palette(accent);
				}

				&.opener {
					@include vendor('transition', 'color #{_duration(transition)} ease-in-out');
					@include icon(false, solid);
					-webkit-tap-highlight-color: rgba(255,255,255,0);
					position: relative;

					&:before {
						@include vendor('transition', (
							'color #{_duration(transition)} ease-in-out',
							'transform #{_duration(transition)} ease-in-out'
						));
						color: _palette(fg-light);
						content: '\f078';
						position: absolute;
						right: 0;
					}

					&:hover {
						&:before {
							color: _palette(accent);
						}
					}

					&.active {
						& + ul {
							display: block;
						}

						&:before {
							@include vendor('transform', 'rotate(-180deg)');
						}
					}
				}
			}
		}

		> ul {
			> li {
				border-top: solid 1px _palette(border);
				margin: 0.5em 0 0 0;
				padding: 0.5em 0 0 0;

				> ul {
					color: _palette(fg-light);
					display: none;
					margin: 0.5em 0 1.5em 0;
					padding-left: 1em;

					a, span {
						font-size: 0.8em;
					}

					> li {
						margin: 0.125em 0 0 0;
						padding: 0.125em 0 0 0;
					}
				}

				&:first-child {
					border-top: 0;
					margin-top: 0;
					padding-top: 0;
				}
			}
		}
	}