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

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

.#{$primaryStyleName} {
	white-space: nowrap;
	display: inline-block; /* Force minimum width */
}
.#{$primaryStyleName}-textfield {
	vertical-align: top;
}
.v-ie & .#{$primaryStyleName}-button:after {
	content: "\200B";
}

.#{$primaryStyleName}-button {
	cursor: pointer;
	vertical-align: top;
}
.v-has-width > input.#{$primaryStyleName}-textfield {
	width: 100%;
}

.#{$primaryStyleName}-prompt .#{$primaryStyleName}-textfield {
	color: #999;
	font-style: italic;
}
.#{$primaryStyleName} .#{$primaryStyleName}-button-readonly {
	display: none;
}
.#{$primaryStyleName}-calendarpanel table {
	width: 100%;
}
.#{$primaryStyleName}-calendarpanel td {
	padding: 0;
	margin: 0;
}
.#{$primaryStyleName}-calendarpanel:focus {
	outline:none;	
}
.#{$primaryStyleName}-calendarpanel-header td {
	text-align: center;
}
.#{$primaryStyleName}-calendarpanel-month {
	text-align: center;
	white-space: nowrap;
}
.#{$primaryStyleName}-calendarpanel-weeknumber {
	color: #999;
	border-right: 1px solid #ddd;
	font-size: 11.7px;
}
.#{$primaryStyleName}-calendarpanel-day,
.#{$primaryStyleName}-calendarpanel-day-today {
	cursor: pointer;
}
.#{$primaryStyleName}-calendarpanel-day-today {
	border: 1px solid #ddd;
}
.v-disabled .#{$primaryStyleName}-calendarpanel-day,
.v-disabled .#{$primaryStyleName}-calendarpanel-day-today,
.v-disabled.#{$primaryStyleName}-popupcalendar .#{$primaryStyleName}-button {
	cursor: default;
}
.#{$primaryStyleName}-calendarpanel-day-disabled,
.#{$primaryStyleName}-calendarpanel-day-outside-range {
	cursor: default;
	opacity: .5;
}

.#{$primaryStyleName}-calendarpanel-prevyear,
.#{$primaryStyleName}-calendarpanel-nextyear,
.#{$primaryStyleName}-calendarpanel-prevmonth,
.#{$primaryStyleName}-calendarpanel-nextmonth {
	button.outside-range{
		opacity: .5;
 	}
}

.#{$primaryStyleName}-calendarpanel-day-selected {
	cursor: default;
	background: #333;
	color: #fff;
}
.#{$primaryStyleName}-calendarpanel-day-focused {
	outline: 1px dotted black;
}
.#{$primaryStyleName}-calendarpanel-day-offmonth {
    color: #666;
}

.#{$primaryStyleName}-time {
	white-space: nowrap;
}
.#{$primaryStyleName}-time .v-label {
	display: inline;
}
.#{$primaryStyleName}-popup {
	background: #fff;
	 .v-ie9 &, .v-ie10 &, .v-ie11 & {
	 	box-shadow: 0 2px 10px 0 rgba(0, 0, 0, .5);
    }	
}
.#{$primaryStyleName}-popupcalendar input.#{$primaryStyleName}-textfield {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}
/* Disabled by default
.#{$primaryStyleName}-error .v-textfield,
.#{$primaryStyleName}-error .#{$primaryStyleName}-calendarpanel {
	background: #ffe0e0;
}
*/

/* Disabled by default
.#{$primaryStyleName}-required .v-textfield,
.#{$primaryStyleName}-required .#{$primaryStyleName}-calendarpanel {
	background:transparent;
	background-color: #ffe0e0;
}
*/

}