/* ==========================================================================
   Helper classes
   ========================================================================== */

/*
 * Hide visually and from screen readers:
 */

.hidden {
	display: none !important;
}

/*
 * Hide only visually, but have it available for screen readers:
 * http://snook.ca/archives/html_and_css/hiding-content-for-accessibility
 */

.visuallyhidden {
	border: 0;
	clip: rect(0 0 0 0);
	height: 1px;
	margin: -1px;
	overflow: hidden;
	padding: 0;
	position: absolute;
	width: 1px;
}

/*
 * Extends the .visuallyhidden class to allow the element
 * to be focusable when navigated to via the keyboard:
 * https://www.drupal.org/node/897638
 */

.visuallyhidden.focusable:active,
.visuallyhidden.focusable:focus {
	clip: auto;
	height: auto;
	margin: 0;
	overflow: visible;
	position: static;
	width: auto;
}

/*
 * Hide visually and from screen readers, but maintain layout
 */

.invisible {
	visibility: hidden;
}

/*
 * Clearfix: contain floats
 *
 * For modern browsers
 * 1. The space content is one way to avoid an Opera bug when the
 *    `contenteditable` attribute is included anywhere else in the document.
 *    Otherwise it causes space to appear at the top and bottom of elements
 *    that receive the `clearfix` class.
 * 2. The use of `table` rather than `block` is only necessary if using
 *    `:before` to contain the top-margins of child elements.
 */

.clearfix:before,
.clearfix:after {
	content: " "; /* 1 */
	display: table; /* 2 */
}

.clearfix:after {
	clear: both;
}

/*
 * Columns
 */

.row::after,
.row::before {
	display: table;
	content: " ";
}

.row::after {
	clear: both;
}

.column {
	float: left;
	position: relative;
	min-height: 1px;
}