/**
 * CHGA Header block.
 *
 * In overlay mode the header takes no space in the flow and floats over the
 * block below it, exactly as in the design. It is absolutely positioned rather
 * than fixed, so it scrolls away with the page.
 */

.chga-header {
	--chga-header-bg: var(--chga-navy);
	--chga-header-link: var(--chga-white);
	--chga-header-logo-width: 230px;
	--chga-header-logo-width-stuck: 170px;
	--chga-header-pad-y: clamp(1rem, 0.6rem + 1.4vw, 2.25rem);
	--chga-header-pad-y-stuck: clamp(0.5rem, 0.35rem + 0.5vw, 0.875rem);
	/*
	 * Matches the hero's text inset so the logo lines up with the headline, as
	 * the design has it. The hero insets its copy by 15.6cqw of a panel that is
	 * half the viewport by default, which is the 7.8vw below. Widen the hero's
	 * "Image width" a long way from 50% and the two drift apart.
	 */
	--chga-header-pad-x: clamp(1.25rem, 7.8vw, 9.375rem);
	--chga-header-stuck-height: auto;

	position: relative;
	z-index: 20;
	color: var(--chga-header-link);
}

.chga-header--overlay {
	height: 0;
}

.chga-header--overlay .chga-header__inner {
	position: absolute;
	inset: 0 0 auto;
}

.chga-header--solid {
	background-color: var(--chga-header-bg);
}

.chga-header__inner {
	width: 100%;
}

.chga-header__bar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: clamp(1rem, 2vw, 2.5rem);
	padding: var(--chga-header-pad-y) var(--chga-header-pad-x);
	transition: padding 0.45s var(--chga-ease);
}

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

/*
 * Once the header has scrolled away the view script adds --stuck and a compact
 * bar drops in. Only the inner element goes fixed, so a solid header keeps the
 * space it gave up (the script measures it) and nothing below jumps.
 */
.chga-header--stuck .chga-header__inner {
	position: fixed;
	inset: 0 0 auto;
	background-color: var(--chga-header-bg);
	box-shadow: 0 14px 34px -22px rgba(0, 0, 0, 0.85);
	animation: chga-header-drop 0.45s var(--chga-ease) both;
}

.chga-header--solid.chga-header--stuck {
	height: var(--chga-header-stuck-height);
}

.chga-header--stuck .chga-header__bar {
	padding-block: var(--chga-header-pad-y-stuck);
}

.chga-header--stuck .chga-header__logo {
	width: min(var(--chga-header-logo-width-stuck), 34vw);
}

@keyframes chga-header-drop {
	from {
		transform: translateY(-100%);
	}

	to {
		transform: translateY(0);
	}
}

/* Brand ------------------------------------------------------------------ */

.chga-header__brand {
	flex: 0 1 auto;
	line-height: 0;
	min-width: 0;
}

.chga-header__brand-link {
	display: inline-block;
	line-height: 0;
	transition: opacity 0.4s var(--chga-ease), transform 0.6s var(--chga-ease);
}

.chga-header__brand-link:hover,
.chga-header__brand-link:focus-visible {
	opacity: 0.86;
	transform: translateY(-2px);
}

.chga-header__logo {
	display: block;
	width: min(var(--chga-header-logo-width), 42vw);
	height: auto;
	transition: width 0.45s var(--chga-ease);
}

/* End cluster ------------------------------------------------------------ */

.chga-header__end {
	display: flex;
	align-items: center;
	gap: clamp(0.75rem, 1.6vw, 2rem);
}

.chga-header__menu {
	display: flex;
	align-items: center;
	gap: clamp(1rem, 1.8vw, 2.25rem);
	margin: 0;
	padding: 0;
	list-style: none;
}

.chga-header__menu-item {
	margin: 0;
}

.chga-header__menu-link {
	position: relative;
	display: inline-block;
	padding: 0.35rem 0;
	/* 24px on the 1920 artboard. */
	font-size: clamp(0.9375rem, 0.45rem + 0.85vw, 1.5rem);
	font-weight: 600;
	line-height: 1.3;
	color: currentColor;
	text-decoration: none;
	transition: color 0.35s var(--chga-ease);
}

.chga-header__menu-link::after {
	content: "";
	position: absolute;
	inset: auto 0 0;
	height: 2px;
	background: var(--chga-gold-gradient);
	transform: scaleX(0);
	transform-origin: left center;
	transition: transform 0.45s var(--chga-ease);
}

.chga-header__menu-link:hover::after,
.chga-header__menu-link:focus-visible::after {
	transform: scaleX(1);
}

.chga-header__menu-link:hover,
.chga-header__menu-link:focus-visible {
	color: var(--chga-gold-light);
}

.chga-header__button {
	min-height: 2.75rem;
	padding: 0.7rem clamp(1.15rem, 0.8rem + 1vw, 1.75rem);
	font-size: clamp(0.875rem, 0.83rem + 0.16vw, 1rem);
	box-shadow: 0 18px 34px -18px rgba(0, 31, 83, 0.8);
	white-space: nowrap;
}

/* Dropdowns -------------------------------------------------------------- */

.chga-header__menu-item--parent {
	position: relative;
	display: flex;
	align-items: center;
	gap: 0.35rem;
}

.chga-header__submenu-toggle {
	display: inline-flex;
	align-items: center;
	gap: 0.5em;
	margin: 0;
	font-family: inherit;
	background: none;
	border: 0;
	cursor: pointer;
}

/* A caret beside a parent that is also a link: give it a real target. */
.chga-header__submenu-toggle--caret {
	justify-content: center;
	min-width: 1.75rem;
	min-height: 1.75rem;
}

.chga-header__caret {
	display: block;
	width: 0.6em;
	height: auto;
	/* The design draws it in the deeper gold against the white label. */
	color: var(--chga-gold-mid);
	transition: transform 0.4s var(--chga-ease);
}

.chga-header__submenu-toggle[aria-expanded="true"] .chga-header__caret {
	transform: rotate(180deg);
}

.chga-header__submenu {
	margin: 0;
	padding: 0;
	list-style: none;
}

.chga-header__submenu-link {
	display: block;
	padding: 0.8rem 1.25rem;
	font-size: clamp(0.875rem, 0.83rem + 0.16vw, 1rem);
	font-weight: 600;
	line-height: 1.3;
	color: var(--chga-white);
	text-decoration: none;
	white-space: nowrap;
	transition: color 0.35s var(--chga-ease), background-color 0.35s var(--chga-ease);
}

.chga-header__submenu-link:hover,
.chga-header__submenu-link:focus-visible {
	color: var(--chga-gold-light);
	background-color: rgba(255, 255, 255, 0.06);
}

.chga-header__submenu-link:focus-visible,
.chga-header__menu-link:focus-visible {
	outline: 2px solid var(--chga-gold-light);
	outline-offset: 3px;
}

@media (min-width: 62rem) {
	.chga-header__submenu {
		position: absolute;
		top: calc(100% + 0.6rem);
		left: 50%;
		min-width: 15rem;
		padding: 0.4rem 0;
		background-color: var(--chga-header-bg);
		border-top: 2px solid var(--chga-gold);
		box-shadow: 0 26px 50px -24px rgba(0, 0, 0, 0.75);
		opacity: 0;
		visibility: hidden;
		transform: translate(-50%, -0.4rem);
		transition:
			opacity 0.3s var(--chga-ease),
			transform 0.4s var(--chga-ease),
			visibility 0s linear 0.4s;
		z-index: 2;
	}

	/* Bridges the gap so the pointer can travel from the label to the panel. */
	.chga-header__submenu::before {
		content: "";
		position: absolute;
		inset: -0.8rem 0 100%;
	}

	/* Keyboard opens it with the button; focus alone never does, so Escape can close it. */
	.chga-header__submenu-toggle[aria-expanded="true"] + .chga-header__submenu {
		opacity: 1;
		visibility: visible;
		transform: translate(-50%, 0);
		transition:
			opacity 0.3s var(--chga-ease),
			transform 0.4s var(--chga-ease),
			visibility 0s;
	}

	@media (hover: hover) {
		.chga-header__menu-item--parent:hover .chga-header__submenu {
			opacity: 1;
			visibility: visible;
			transform: translate(-50%, 0);
			transition:
				opacity 0.3s var(--chga-ease),
				transform 0.4s var(--chga-ease),
				visibility 0s;
		}

		.chga-header__menu-item--parent:hover .chga-header__caret {
			transform: rotate(180deg);
		}
	}

	/* Centred menu ------------------------------------------------------- */

	.chga-header--menu-centre .chga-header__bar {
		display: grid;
		grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
	}

	.chga-header--menu-centre .chga-header__end {
		display: contents;
	}

	.chga-header--menu-centre .chga-header__nav {
		grid-column: 2;
	}

	.chga-header--menu-centre .chga-header__actions {
		grid-column: 3;
		justify-self: end;
	}
}

/* Mobile toggle ---------------------------------------------------------- */

.chga-header__toggle {
	display: none;
	align-items: center;
	justify-content: center;
	width: 2.75rem;
	height: 2.75rem;
	padding: 0;
	color: currentColor;
	background: transparent;
	border: 1px solid rgba(255, 255, 255, 0.35);
	border-radius: 2px;
	cursor: pointer;
	transition: border-color 0.35s var(--chga-ease), background-color 0.35s var(--chga-ease);
}

.chga-header__toggle:hover,
.chga-header__toggle:focus-visible {
	border-color: var(--chga-gold-light);
	background-color: rgba(255, 255, 255, 0.08);
}

.chga-header__toggle-bars {
	display: grid;
	gap: 4px;
	width: 1.25rem;
}

.chga-header__toggle-bars i {
	display: block;
	height: 2px;
	background: currentColor;
	transition: transform 0.4s var(--chga-ease), opacity 0.3s var(--chga-ease);
}

.chga-header__toggle[aria-expanded="true"] .chga-header__toggle-bars i:nth-child(1) {
	transform: translateY(6px) rotate(45deg);
}

.chga-header__toggle[aria-expanded="true"] .chga-header__toggle-bars i:nth-child(2) {
	opacity: 0;
}

.chga-header__toggle[aria-expanded="true"] .chga-header__toggle-bars i:nth-child(3) {
	transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 61.999rem) {
	.chga-header__toggle {
		display: inline-flex;
		order: 2;
	}

	.chga-header__nav {
		position: absolute;
		inset: 100% var(--chga-header-pad-x) auto;
		background-color: var(--chga-header-bg);
		border-top: 2px solid var(--chga-gold);
		box-shadow: 0 26px 50px -26px rgba(0, 0, 0, 0.7);
		overflow: hidden;
		max-height: 0;
		visibility: hidden;
		transition:
			max-height 0.45s var(--chga-ease),
			visibility 0s linear 0.45s;
	}

	.chga-header__nav.is-open {
		max-height: 70vh;
		visibility: visible;
		transition:
			max-height 0.5s var(--chga-ease),
			visibility 0s;
	}

	.chga-header__menu {
		flex-direction: column;
		align-items: stretch;
		gap: 0;
		padding: 0.5rem 0;
	}

	.chga-header__menu-item + .chga-header__menu-item {
		border-top: 1px solid rgba(255, 255, 255, 0.12);
	}

	.chga-header__menu-link {
		display: block;
		padding: 0.9rem 1.25rem;
	}

	.chga-header__menu-link::after {
		inset: auto auto 0 1.25rem;
		right: 1.25rem;
	}

	.chga-header__menu-item--parent {
		flex-wrap: wrap;
		gap: 0;
	}

	.chga-header__submenu-toggle {
		display: flex;
		width: 100%;
		justify-content: space-between;
		text-align: left;
	}

	/* The open caret already says which item is expanded. */
	.chga-header__submenu-toggle::after {
		display: none;
	}

	.chga-header__menu-item--parent > .chga-header__menu-link:not(.chga-header__submenu-toggle) {
		flex: 1 1 auto;
	}

	.chga-header__menu-item--parent > .chga-header__submenu-toggle--caret {
		width: auto;
		padding-inline: 1.25rem;
	}

	.chga-header__submenu {
		flex: 1 0 100%;
		max-height: 0;
		overflow: hidden;
		visibility: hidden;
		background-color: rgba(255, 255, 255, 0.05);
		transition:
			max-height 0.4s var(--chga-ease),
			visibility 0s linear 0.4s;
	}

	.chga-header__submenu-toggle[aria-expanded="true"] + .chga-header__submenu {
		max-height: 20rem;
		visibility: visible;
		transition:
			max-height 0.45s var(--chga-ease),
			visibility 0s;
	}

	.chga-header__submenu-link {
		padding-left: 2.25rem;
		white-space: normal;
	}
}

@media (max-width: 30rem) {
	.chga-header__button {
		padding-inline: 0.9rem;
		font-size: 0.8125rem;
	}
}

/* Editor preview --------------------------------------------------------- */

.chga-header--preview.chga-header--overlay {
	height: auto;
	background-color: var(--chga-header-bg);
}

.chga-header--preview.chga-header--overlay .chga-header__inner {
	position: relative;
	inset: auto;
}