Overleaf/services/web/public/stylesheets/app/editor/toolbar.less

.toolbar {
	display: flex;
	align-items: center;
	height: 40px;
	border-bottom: @toolbar-border-bottom;

	> a, .toolbar-right > a {
		position: relative;
		.label {
			position: absolute;
			top: 0;
			right: 0;
			padding: .15em .6em .2em;
			font-size: 60%;
			pointer-events: none; // Labels were capturing button/anchor clicks.
		}
	}

	> a:focus {
		outline: none;
	}

	> a:not(.btn),
	.toolbar-left > a:not(.btn),
	.toolbar-right > a:not(.btn) {
		display: inline-block;
		color: @toolbar-icon-btn-color;
		padding: 4px 2px;
		line-height: 1;
		height: 24px;
		border-radius: @border-radius-small;
		&.toolbar-header-back-projects {
			padding: 5px 10px 4px;
			margin-bottom: 1px;
		}
		&:hover {
			text-shadow: @toolbar-icon-btn-hover-shadow;
			color: @toolbar-icon-btn-hover-color;
			text-decoration: none;
		}
		&.active, &:active {
			.label {
				display: none;
			}
			color: white;
			background-color: @link-color;
			box-shadow: @toolbar-icon-btn-hover-boxshadow;
			&:hover {
				color: white;
			}
		}
	}

	&.toolbar-pdf > a:not(.btn) {
		margin-right: 3px;
	}

	.btn-full-height {
		border: none;
		border-radius: 0;
		border-right: 1px solid @toolbar-header-btn-border-color;
		color: @toolbar-btn-color;
		padding: 3px 10px 5px;
		font-size: 20px;
		&:hover {
			text-shadow: @toolbar-btn-hover-text-shadow;
			background-color: @toolbar-btn-hover-bg-color;
			color: @toolbar-btn-hover-color;
		}
		&.active, &:active {
			color: @toolbar-btn-active-color;
			background-color: @toolbar-btn-active-bg-color;
			box-shadow: @toolbar-btn-active-shadow;
		}
		&.btn-full-height-disabled {
			opacity: 0.65;
			&:hover,
			&.active,
			&:active {
				text-shadow: none;
				background-color: transparent;
				color: @toolbar-btn-color;
				box-shadow: none;
			}
		}
		.label {
			top: 4px;
			right: 4px;
		}
	}
	.btn-full-height-no-border {
		border-right: 0;
		border-left: 0;
	}

	.toolbar-left {
		display: flex;
		float: left;
		text-align: center;
		align-items: center;
	}

	.toolbar-right {
		display: flex;
		align-items: center;
		flex-grow: 1;
		justify-content: flex-end;
		.btn-full-height {
			border-right: 0;
			border-left: 1px solid @toolbar-header-btn-border-color;
		}
	}

	.toolbar-center {
		width: 300px;
		position: absolute;
		top: 0;
		left: 50%;
		margin-left: -150px;
		text-align: center;
		text-overflow: ellipsis;
		overflow: hidden;
	}

	&.toolbar-header {
		background-color: @toolbar-header-bg-color;
		box-shadow: @toolbar-header-shadow;
		position: absolute;
		top: 0;
		left: 0;
		right: 0;
		z-index: 1;
	}

	&.toolbar-small {
		.toolbar-small-mixin;
	}

	&.toolbar-tall {
		.toolbar-small-mixin;
	}

	&.toolbar-alt {
		.toolbar-alt-mixin;
	}
}

.toolbar-small-mixin() {
	height: @toolbar-small-height;
}

.toolbar-tall-mixin() {
	height: @toolbar-tall-height;
	padding-top: 10px;
}
.toolbar-alt-mixin() {
	background-color: @toolbar-alt-bg-color;
}

.toolbar-label {
	display: none;
	margin: 0 4px;
	font-size: @toolbar-font-size;
	font-weight: 600;
	margin-bottom: 2px;
	vertical-align: middle;

	@media (min-width: @screen-sm-min) {
		display: inline-block;
	}
}

.editor-dark {
	.toolbar-alt {
		background-color: darken(@editor-dark-background-color, 0%);
	}
	.toolbar {
		border-color: @editor-dark-toolbar-border-color;
		.btn-full-height {
			border-color: @editor-dark-toolbar-border-color;
			&:hover {
				background-color: black;
				color: lighten(@link-color, 10%);
			}
		}
		&.toolbar-header {
			box-shadow: none;
		}
		> a:not(.btn) {
			color: @gray;
			&:hover {
				color: @gray-light;
			}
		}
	}
}

/**************************************
	Toggle Switch
***************************************/

.toggle-wrapper {
	min-width: 200px;
	height: 24px;
}

.toggle-switch {
	position: relative;
	height: 100%;
	width: 100%;
	background-color: @toggle-switch-bg;
	border-radius: @btn-border-radius-base;
}

.toggle-switch-label {
	position: relative;
	display: block;
	font-weight: normal;
	z-index: 2;
	float: left;
	width: 50%;
	height: 100%;
	line-height: 24px;
	text-align: center;
	margin-bottom: 0;
	cursor: pointer;
	user-select: none;
	color: @text-color;
	transition: color 0.12s ease-out;
}

.toggle-switch-input {
	position: absolute;
	opacity: 0;
}

.toggle-switch-input:checked + .toggle-switch-label {
	color: #fff;
	font-weight: bold;
}

.toggle-switch-selection {
	display: block;
	position: absolute;
	z-index: 1;
	top: 2px;
	left: 2px;
	right: 2px;
	width: calc(~"50% - 2px");
	height: calc(~"100% - 4px");
	background: @toggle-switch-highlight-color;
	border-radius: @btn-border-radius-base 0 0 @btn-border-radius-base;
	transition: transform 0.12s ease-out, border-radius 0.12s ease-out;
}

.toggle-switch-input:checked:nth-child(4) ~ .toggle-switch-selection {
	transform: translate(100%);
	border-radius: 0 @btn-border-radius-base @btn-border-radius-base 0;
}

/**************************************
	Formatting buttons
***************************************/
.formatting-buttons {
	width: 100%;
	overflow: hidden;
}

.formatting-buttons-wrapper {
	display: flex;
}

.formatting-btn {
	color: @formatting-btn-color;
	background-color: @formatting-btn-bg;
	padding: 0;
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: none;
	border: none;
	border-left: 1px solid @formatting-btn-border;
	border-radius: 0;

	&:hover {
		color: @formatting-btn-color;
	}
}

.formatting-btn--icon {
	min-width: 32px;
	width: 32px;
}

.formatting-btn--icon:last-of-type {
	border-right: 1px solid @formatting-btn-border;
}

.formatting-btn--more {
	padding-left: 9px;
	padding-right: 9px;

	.caret {
		margin-top: 1px;
	}
}

.formatting-icon {
	font-style: normal;
	line-height: 1.5;
}

.formatting-icon--small {
	font-size: small;
	line-height: 1.9;
}

.formatting-icon--serif {
	font-family: @font-family-serif;
}

.formatting-more {
	margin-left: auto;
}

.formatting-menu {
	min-width: auto;
	max-width: 130px;
	background-color: @formatting-menu-bg;
}

.formatting-menu-item {
	float: left;
}

.formatting-menu-item > .formatting-btn {
	border-right: none;
}

// Disable border on left-most icon in menu
.formatting-menu-item:nth-of-type(4n + 1) > .formatting-btn {
	border-left: none;
}