/*
 * The site header: logo, tools (search, links, account icon), the menu with
 * its submenus, the menu button and list below 922px, and the bar that
 * sticks to the top of the window when the page scrolls.
 * Markup: parts/site-header.php. Behaviour: assets/js/header.js.
 */

.st-header {
	position: relative;
	z-index: 99;
}

.st-header__top,
.st-header__bar {
	background-color: #fff;
}

.st-header__top {
	border-bottom: 1px solid var(--ast-border-color);
}

.st-header__row {
	align-items: center;
	display: flex;
	position: relative;
}

.st-header__top .st-header__row {
	justify-content: space-between;
	min-height: 50px;
}

.st-header__bar {
	padding-top: 5px;
	position: relative;
	z-index: 4;
}

.st-header__bar .st-header__row {
	column-gap: 20px;
	min-height: var(--st-menu-height);
}

.st-icon {
	align-items: center;
	display: inline-flex;
}

.st-icon svg {
	fill: currentColor;
}

/* ---------- Logo ---------- */

.st-logo {
	align-items: center;
	display: flex;
	flex: 0 1 auto;
	line-height: 1;
	min-width: 0;
	padding: 1em 0;
	transition: padding .2s linear;
}

.st-logo a {
	display: inline-flex;
	max-width: 100%;
	padding-right: 1em;
}

.st-logo img {
	height: auto;
	max-width: 100%;
}

.st-logo__text {
	color: var(--ast-global-color-2);
	font-size: 1.5rem;
	font-weight: var(--st-heading-weight);
	line-height: 1.2;
}

/* ---------- Tools ---------- */

.st-tools {
	align-items: center;
	display: flex;
	justify-content: flex-end;
	margin-left: auto;
}

.st-tool {
	align-items: center;
	display: flex;
	padding: 0 10px;
}

.st-tool:first-child {
	padding-left: 0;
}

.st-tool:last-child {
	padding-right: 0;
}

.st-tool--link {
	font-size: 15px;
	font-size: .9375rem;
}

.st-tool__account {
	display: inline-flex;
}

.st-tool__account svg {
	fill: var(--ast-global-color-2);
	height: 18px;
	width: 18px;
}

/* Search: the icon opens a box that slides out to its left. */
.st-search {
	align-items: center;
	display: flex;
	position: relative;
	z-index: 3;
}

.st-search__toggle,
.st-search__toggle:hover,
.st-search__toggle:focus {
	background: transparent;
	border: 0;
	box-shadow: none;
	color: var(--ast-global-color-0);
	font-size: 18px;
	line-height: normal;
	padding: 0;
	position: relative;
	z-index: 4;
}

.st-search__toggle:hover,
.st-search__toggle:focus {
	color: var(--ast-global-color-1);
}

.st-search__toggle svg {
	height: 1em;
	margin-right: 2px;
	margin-top: 3px;
	width: .9em;
}

.st-search__form {
	align-items: center;
	background-color: #fff;
	border: 2px solid var(--ast-global-color-0);
	border-radius: 2px;
	display: flex;
	opacity: 0;
	padding: 0 3em 0 0;
	position: absolute;
	right: -1em;
	top: 50%;
	transform: translateY(-50%);
	transition: all .2s;
	visibility: hidden;
	z-index: 3;
}

.st-search.is-open .st-search__form {
	opacity: 1;
	visibility: visible;
}

.st-search__form .search-field,
.st-search__form .search-field:focus {
	background: transparent;
	border: 0;
	box-shadow: none;
	color: #757575;
	height: auto;
	padding: .6em;
	transition: width .3s;
	width: 0;
}

.st-search.is-open .search-field {
	width: 235px;
}

/* ---------- Menu ---------- */

.st-nav {
	flex: 1 1 auto;
}

.st-menu,
.st-menu .sub-menu {
	list-style: none;
	margin: 0;
	padding: 0;
}

.st-menu li {
	position: relative;
}

.st-menu .menu-link {
	color: var(--ast-global-color-3);
	display: block;
	text-decoration: none;
	transition: all .2s linear;
}

.st-menu .menu-link:hover,
.st-menu .menu-item:hover > .menu-link,
.st-menu .current-menu-item > .menu-link,
.st-menu .current-menu-ancestor > .menu-link {
	color: var(--ast-global-color-1);
}

.st-menu .menu-heading {
	font-weight: 600;
}

.st-submenu-toggle,
.st-submenu-toggle:hover,
.st-submenu-toggle:focus {
	background: transparent;
	border: 0;
	box-shadow: none;
	color: inherit;
	line-height: inherit;
	padding: 0;
}

.st-submenu-toggle svg {
	height: .6em;
	width: .6em;
}

.st-menu-toggle {
	display: none;
}

/* Desktop: the menu runs across the bar; submenus drop down on hover or
   keyboard focus, or when their arrow is clicked. */
@media (min-width: 922px) {
	.st-header--stacked .st-logo--bar {
		display: none;
	}

	.st-menu {
		display: flex;
		flex-wrap: wrap;
		justify-content: center;
	}

	.st-header--inline .st-menu {
		justify-content: flex-end;
	}

	.st-menu > li {
		align-items: center;
		display: flex;
		line-height: var(--st-menu-height);
	}

	.st-menu > li > .menu-link {
		padding: 0 1em;
	}

	.st-menu > li:last-child > .menu-link {
		margin-right: 0;
	}

	.st-menu > li.menu-item-has-children > .menu-link {
		padding-right: 0;
	}

	.st-menu > li > .st-submenu-toggle {
		padding: 0 1em 0 10px;
	}

	.st-menu .sub-menu {
		background-color: #fff;
		border-top: 2px solid var(--ast-global-color-0);
		box-shadow: 0 4px 10px -2px rgba(0, 0, 0, .1);
		left: -999em;
		line-height: 1.45;
		position: absolute;
		top: 100%;
		visibility: hidden;
		width: 240px;
		z-index: 99999;
	}

	.st-menu li:hover > .sub-menu,
	.st-menu li:focus-within > .sub-menu,
	.st-menu li.is-open > .sub-menu {
		left: 0;
		visibility: visible;
	}

	.st-menu .sub-menu .sub-menu {
		top: -2px;
	}

	.st-menu .sub-menu li:hover > .sub-menu,
	.st-menu .sub-menu li:focus-within > .sub-menu,
	.st-menu .sub-menu li.is-open > .sub-menu {
		left: 100%;
	}

	.st-menu .sub-menu .menu-link {
		padding: .9em 1em;
		word-wrap: break-word;
	}

	.st-menu .sub-menu .menu-item-has-children > .menu-link {
		padding-right: 2.5em;
	}

	.st-menu .sub-menu .st-submenu-toggle {
		align-items: center;
		display: flex;
		height: 100%;
		padding: 0 1em;
		position: absolute;
		right: 0;
		top: 0;
		transform: rotate(-90deg);
	}

	/* Mega menu: the submenu spans the bar and shows its items as columns,
	   each with its own list of links. */
	.st-menu > li.menu-item-mega {
		position: static;
	}

	.st-menu > li.menu-item-mega > .sub-menu {
		display: grid;
		gap: 0 1em;
		grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
		padding: 1em;
		right: var(--st-gutter);
		width: auto;
	}

	.st-menu > li.menu-item-mega:hover > .sub-menu,
	.st-menu > li.menu-item-mega:focus-within > .sub-menu,
	.st-menu > li.menu-item-mega.is-open > .sub-menu {
		left: var(--st-gutter);
	}

	.st-menu .menu-item-mega .sub-menu .sub-menu {
		border: 0;
		box-shadow: none;
		left: auto;
		position: static;
		visibility: visible;
		width: auto;
	}

	.st-menu .menu-item-mega .sub-menu .st-submenu-toggle {
		display: none;
	}
}

/* Tablet and phone: the bar shows the logo and the menu button; the menu
   opens as a list under the bar, with submenus opened by their arrows. */
@media (max-width: 921px) {
	.st-header__top,
	.st-header--inline .st-tools {
		display: none;
	}

	.st-header__bar .st-header__row {
		flex-wrap: wrap;
	}

	/* The logo takes the room the menu button leaves, shrinking to fit. */
	.st-header__bar .st-logo {
		flex: 1 1 0%;
	}

	.st-menu-toggle,
	.st-menu-toggle:hover,
	.st-menu-toggle:focus {
		align-items: center;
		background: transparent;
		border: 0;
		box-shadow: none;
		color: var(--ast-global-color-0);
		display: flex;
		font-size: 1.5em;
		line-height: 1;
		margin-left: auto;
		padding: .5em;
	}

	.st-menu-toggle:focus-visible {
		outline: 1px dotted currentColor;
	}

	.st-menu-toggle svg {
		height: 20px;
		width: 20px;
	}

	.st-menu-toggle .st-icon--close,
	.st-header.is-menu-open .st-menu-toggle .st-icon--menu {
		display: none;
	}

	.st-header.is-menu-open .st-menu-toggle .st-icon--close {
		display: inline-flex;
	}

	.st-nav {
		display: none;
		flex-basis: calc(100% + 2 * var(--st-gutter));
		margin: 0 calc(-1 * var(--st-gutter));
		order: 3;
	}

	.st-header.is-menu-open .st-nav {
		display: block;
	}

	.st-menu {
		background-color: #fff;
		line-height: 3;
	}

	.st-menu .menu-link {
		padding: 0 20px;
	}

	.st-menu .menu-link:hover,
	.st-menu .menu-item:hover > .menu-link,
	.st-menu .current-menu-item > .menu-link {
		background-color: var(--ast-global-color-4);
	}

	.st-menu .menu-item-has-children > .menu-link {
		padding-right: 4em;
	}

	.st-menu .st-submenu-toggle {
		height: 3em;
		padding: 0 .907em;
		position: absolute;
		right: 20px;
		top: 0;
	}

	.st-menu .st-submenu-toggle svg {
		height: .85em;
		transition: transform .2s;
		width: .95em;
	}

	.st-menu li.is-open > .st-submenu-toggle svg {
		transform: rotateX(180deg);
	}

	.st-menu .sub-menu {
		display: none;
	}

	.st-menu li.is-open > .sub-menu {
		display: block;
	}

	.st-menu .sub-menu .menu-link { padding-left: 30px; }
	.st-menu .sub-menu .sub-menu .menu-link { padding-left: 40px; }
	.st-menu .sub-menu .sub-menu .sub-menu .menu-link { padding-left: 50px; }
}

/* ---------- Sticky bar ---------- */

/* header.js adds .is-stuck once the header has scrolled out of view; the
   bar then slides in at the top of the window, a little shorter. */
.st-header.is-stuck .st-header__bar {
	animation: st-slide-down .3s linear;
	box-shadow: 0 1px 2px rgba(0, 0, 0, .2);
	left: 0;
	position: fixed;
	right: 0;
	top: var(--wp-admin--admin-bar--height, 0px);
}

.st-header.is-stuck .st-header__bar .st-header__row {
	min-height: var(--st-menu-height-sticky);
}

.st-header.is-stuck .st-logo {
	padding: .5em 0;
}

@media (min-width: 922px) {
	.st-header.is-stuck .st-menu > li {
		line-height: var(--st-menu-height-sticky);
	}
}

@media (max-width: 921px) {
	.st-header.is-stuck .st-nav {
		max-height: calc(100vh - 100px);
		overflow-y: auto;
	}
}

/* Below 601px the admin bar scrolls away with the page. */
@media (max-width: 600px) {
	.admin-bar .st-header.is-stuck .st-header__bar {
		top: 0;
	}
}

@keyframes st-slide-down {
	from { transform: translateY(-100%); }
	to { transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
	.st-header.is-stuck .st-header__bar {
		animation: none;
	}
}