server/core/css/header.scss

/* prevent ugly selection effect on accidental selection */

#header, #navigation, #expanddiv {
	-webkit-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
}

/* removed until content-focusing issue is fixed */

#skip-to-content a {
	position: absolute;
	left: -10000px;
	top: auto;
	width: 1px;
	height: 1px;
	overflow: hidden;
	&:focus {
		left: 76px;
		top: -9px;
		color: #fff;
		width: auto;
		height: auto;
	}
}

/* HEADERS ------------------------------------------------------------------ */

#body-user #header, #body-settings #header, #body-public #header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 2000;
	height: 45px;
	line-height: 2.5em;
	background-color: #0082c9;
	box-sizing: border-box;
}

/* LOGO and APP NAME -------------------------------------------------------- */

#nextcloud {
	position: absolute;
	top: 0;
	left: 0;
	padding: 5px;
	padding-bottom: 0;
	height: 45px;
	/* header height */
	box-sizing: border-box;
	-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
	opacity: 1;
	&:focus {
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=75)';
		opacity: .75;
	}
	&:hover, &:active {
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
		opacity: 1;
	}
}

#header {
	.logo {
		background-image: url('../img/logo-icon.svg?v=1');
		background-repeat: no-repeat;
		background-size: 175px;
		background-position: center;
		width: 252px;
		height: 120px;
		margin: 0 auto;
	}
	.logo-icon {
		/* display logo so appname can be shown next to it */
		display: inline-block;
		background-image: url('../img/logo-icon.svg?v=1');
		background-repeat: no-repeat;
		background-position: center center;
		width: 62px;
		height: 34px;
	}
	.header-appname-container {
		display: inline-block;
		position: absolute;
		left: 70px;
		height: 27px;
		padding-top: 18px;
		padding-right: 10px;
	}
}

/* hover effect for app switcher label */

.header-appname-container .header-appname {
	-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=75)';
	opacity: .75;
}

.menutoggle {
	.icon-caret {
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=75)';
		opacity: .75;
	}
	&:hover {
		.header-appname, .icon-caret {
			-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
			opacity: 1;
		}
	}
	&:focus {
		.header-appname, .icon-caret {
			-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
			opacity: 1;
		}
	}
	&.active {
		.header-appname, .icon-caret {
			-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
			opacity: 1;
		}
	}
}

/* show appname next to logo */

.header-appname {
	display: inline-block;
	position: relative;
	color: #fff;
	font-size: 16px;
	font-weight: 300;
	margin: 0;
	margin-top: -24px;
	padding: 7px 0 7px 5px;
	vertical-align: middle;
}

/* show caret indicator next to logo to make clear it is tappable */

#header .icon-caret {
	display: inline-block;
	width: 12px;
	height: 12px;
	margin: 0;
	margin-top: -21px;
	padding: 0;
	vertical-align: middle;
}

/* do not show menu toggle on public share links as there is no menu */

#body-public #header .icon-caret {
	display: none;
}

/* NAVIGATION --------------------------------------------------------------- */

#navigation {
	position: fixed;
	top: 45px;
	left: 10px;
	width: 265px;
	max-height: 85%;
	margin-top: 0;
	padding-bottom: 10px;
	background-color: rgba(255, 255, 255, 0.97);
	box-shadow: 0 1px 10px rgba(150, 150, 150, 0.75);
	border-radius: 3px;
	border-top-left-radius: 0;
	border-top-right-radius: 0;
	display: none;
	/*overflow-y: auto;
	overflow-x: hidden;*/
	z-index: 2000;
	&:after {
		bottom: 100%;
		border: solid transparent;
		content: ' ';
		height: 0;
		width: 0;
		position: absolute;
		pointer-events: none;
		border-color: rgba(0, 0, 0, 0);
		border-bottom-color: rgba(255, 255, 255, 0.97);
		border-width: 10px;
		margin-left: -10px;
	}
}

/* arrow look */

#expanddiv:after {
	bottom: 100%;
	border: solid transparent;
	content: ' ';
	height: 0;
	width: 0;
	position: absolute;
	pointer-events: none;
	border-color: rgba(0, 0, 0, 0);
	border-bottom-color: rgba(255, 255, 255, 0.97);
	border-width: 10px;
	margin-left: -10px;
}

/* position of dropdown arrow */

#navigation:after {
	left: 47%;
}

#expanddiv:after {
	right: 15px;
}

#navigation {
	box-sizing: border-box;
	* {
		box-sizing: border-box;
	}
	li {
		display: inline-block;
	}
	a {
		position: relative;
		width: 80px;
		height: 80px;
		display: inline-block;
		text-align: center;
		padding: 20px 0;
		span {
			display: inline-block;
			font-size: 13px;
			padding-bottom: 0;
			padding-left: 0;
			width: 80px;
			text-align: center;
			color: #000;
			white-space: nowrap;
			overflow: hidden;
			text-overflow: ellipsis;
		}
		svg, span {
			-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=50)';
			opacity: .5;
		}
		&:hover svg, &:focus svg, &:hover span, &:focus span {
			-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
			opacity: 1;
		}
		&.active {
			svg, span {
				-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
				opacity: 1;
			}
		}
	}
}

/* icon opacity and hover effect */

#apps-management a {
	&:hover svg, &:focus svg, &.active svg, &:hover span, &:focus span, &.active span {
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
		opacity: 1;
	}
}

#navigation .app-icon {
	margin: 0 auto;
	padding: 0;
	max-height: 32px;
	max-width: 32px;
}

/* Apps management */

#apps-management {
	min-height: initial;
	height: initial;
	margin: 0;
	a {
		svg, span {
			-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=30)';
			opacity: .3;
		}
	}
}

/* loading feedback for apps */

#navigation .app-loading {
	.icon-loading-dark {
		display: inline !important;
		position: absolute;
		top: 20px;
		left: 24px;
		width: 32px;
		height: 32px;
	}
	.app-icon {
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=0)';
		opacity: 0;
	}
}

#apps {
	max-height: calc(100vh - 100px);
	overflow: auto;
}

/* USER MENU -----------------------------------------------------------------*/

/* info part on the right, used e.g. for info on who shared something */

.header-right {
	position: absolute;
	right: 0;
	padding: 7px 5px;
	color: #fff;
	height: 100%;
	max-width: 80%;
	white-space: nowrap;
	box-sizing: border-box;
}

/* Profile picture in header */

#header .avatardiv {
	float: left;
	display: inline-block;
	margin-right: 8px;
	cursor: pointer;
	height: 32px;
	width: 32px;
	img {
		opacity: 1;
		cursor: pointer;
	}
}

#settings {
	float: right;
	color: #ddd;
	cursor: pointer;
	.icon-loading-small-dark {
		display: inline-block;
		margin-bottom: -3px;
		margin-right: 6px;
		background-size: 16px 16px;
	}
}

#expand {
	display: block;
	padding: 7px 30px 6px 10px;
	cursor: pointer;
	* {
		cursor: pointer;
	}
	&:hover, &:focus, &:active {
		color: #fff;
	}
	img {
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=70)';
		opacity: .7;
		margin-bottom: -2px;
	}
	&:hover img, &:focus img, &:active img {
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
		opacity: 1;
	}
	.icon-caret {
		margin-top: 0;
	}
}

#expanddiv {
	position: absolute;
	right: 13px;
	top: 45px;
	z-index: 2000;
	display: none;
	background: rgb(255, 255, 255);
	box-shadow: 0 1px 10px rgba(150, 150, 150, 0.75);
	border-radius: 3px;
	border-top-left-radius: 0;
	border-top-right-radius: 0;
	box-sizing: border-box;
	&:after {
		border-color: rgba(0, 0, 0, 0);
		border-bottom-color: rgba(255, 255, 255, 1);
	}
	a {
		display: block;
		height: 40px;
		color: #000;
		padding: 4px 12px 0;
		-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=50)';
		opacity: .5;
		box-sizing: border-box;
		img {
			margin-bottom: -3px;
			margin-right: 6px;
		}
		&:hover, &:focus, &:active, &.active {
			-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
			opacity: 1;
		}
	}
}

/* do not show display name when profile picture is present */

#header {
	.avatardiv.avatardiv-shown + #expandDisplayName {
		display: none;
	}
	#expand {
		display: block;
	}
}