vaadin-framework/themes/src/main/resources/VAADIN/themes/base/tabsheet/tabsheet.scss

@mixin base-tabsheet($primaryStyleName : v-tabsheet) {

.#{$primaryStyleName},
.#{$primaryStyleName}-content,
.#{$primaryStyleName}-deco {
	outline: none; /* Prevent selection outline which might break layouts or cause scrollbars */
	text-align: left; /* Force default alignment */
}
.#{$primaryStyleName}-tabs {
	empty-cells: hide;
	border-collapse: collapse;
	margin: 0;
	padding: 0;
	border: 0;
	width: 100%;
	overflow:hidden;
}
.#{$primaryStyleName}-tabitemcell:focus {
	outline: none;
}
.#{$primaryStyleName}-tabitemcell,
.#{$primaryStyleName}-spacertd {
	margin: 0;
	padding: 0;
	vertical-align: bottom;
}
.#{$primaryStyleName}-spacertd {
	width: 100%;
}
.#{$primaryStyleName}-spacertd div {
	border-left: 1px solid #aaa;
	border-bottom: 1px solid #aaa;
	height: 1em;
	padding: 0.2em 0;
}
.#{$primaryStyleName}-hidetabs > .#{$primaryStyleName}-tabcontainer {
	display: none;
}
.#{$primaryStyleName}-scroller {
	white-space: nowrap;
	text-align: right;
	margin-top: -1em;
}
.v-disabled .#{$primaryStyleName}-scroller {
	display: none;
}
.#{$primaryStyleName}-scrollerPrev,
.#{$primaryStyleName}-scrollerNext,
.#{$primaryStyleName}-scrollerPrev-disabled,
.#{$primaryStyleName}-scrollerNext-disabled {
	border: 1px solid #aaa;
	background: #fff;
	width: 12px;
	height: 1em;
	cursor: pointer;
}
.#{$primaryStyleName}-scrollerPrev-disabled,
.#{$primaryStyleName}-scrollerNext-disabled {
	opacity: 0.5;
	cursor: default;
}
.#{$primaryStyleName}-tabs .v-caption,
.#{$primaryStyleName}-tabs .v-caption span {
	white-space: nowrap;
}
.#{$primaryStyleName}-caption-close {
	display: inline;
	display: inline-block;
	zoom: 1;
	width: 16px;
	height: 16px;
	text-align: center;
	font-weight: bold;
	cursor: pointer;
	vertical-align: middle;
	user-select: none;
	-khtml-user-select: none;
	-ms-user-select: none;
	-moz-user-select: none;
	-webkit-user-select: none;
}
.#{$primaryStyleName} .v-disabled .#{$primaryStyleName}-caption-close {
	cursor: default;
	visibility: hidden;
}
.#{$primaryStyleName}-tabitem:hover .#{$primaryStyleName}-caption-close {
	visibility: visible;
}
.#{$primaryStyleName}-tabitem {
	border: 1px solid #aaa;
	border-right: none;
	cursor: pointer;
	padding: 0.2em 0.5em;
}
.#{$primaryStyleName}-tabitem .v-caption {
	cursor: inherit;
}
.#{$primaryStyleName}.v-disabled .#{$primaryStyleName}-tabitem,
.#{$primaryStyleName}-tabitemcell-disabled .#{$primaryStyleName}-tabitem {
	cursor: default;
}
.#{$primaryStyleName}-tabitem-selected {
	cursor: default;
	border-bottom-color: #fff;
}
.#{$primaryStyleName}-tabitem-selected .v-caption {
	cursor: default;
}
.#{$primaryStyleName}-tabitem-focus .v-captiontext {
    text-decoration: underline;
}
.#{$primaryStyleName}-tabitem-selected.#{$primaryStyleName}-tabitem-focus .v-captiontext {
    text-decoration: inherit;
}
.#{$primaryStyleName}-content {
	border: 1px solid #aaa;
	/* Vertical borders are not supported, use v-tabsheet-tabcontainer and v-tabsheet-deco to present these borders */
	border-top: none;
	border-bottom: none;
	position: relative;
}
.#{$primaryStyleName}-deco {
	height: 1px;
	background: #aaa;
	overflow: hidden;
}
.#{$primaryStyleName}-hidetabs .#{$primaryStyleName}-content {
	border: none;
}
.#{$primaryStyleName}-hidetabs .#{$primaryStyleName}-deco {
	height: 0;
}

}