/**
 * Portable Header styles
 *
 * Notes:
 * - Uses CSS variables like --spacing-sm, --color-white, --transition-base, etc.
 * - In a new theme, either define those variables or replace them with fixed values.
 */

/* =========================
   Header wrapper
   ========================= */

.site-header {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	transition: transform 0.3s ease-in-out;
	transform: translateY(0);
}

.site-header.hidden {
	transform: translateY(-100%);
}

.site-header.scrolled {
	position: fixed;
}

/* Desktop: Sticky when scrolled */
@media (min-width: 769px) {
	.site-header.scrolled {
		position: fixed;
		top: 0;
	}
}

/* Mobile: Smooth show/hide animation */
@media (max-width: 768px) {
	.site-header.scrolled {
		transform: translateY(0);
	}
}

.header-container {
	width: 100%;
	margin: 0;
	padding: 1rem var(--spacing-sm) 1rem var(--spacing-md);
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 0;
}

@media (max-width: 768px) {
	.header-container {
		flex-direction: row;
		justify-content: space-between;
		align-items: flex-start;
		gap: 0;
		padding: 1rem var(--spacing-sm) 1rem var(--spacing-sm);
	}
}

/* =========================
   Site branding
   ========================= */

.site-branding {
	display: flex;
	align-items: center;
}

.site-logo {
	display: block;
	text-decoration: none;
}

.logo-image {
	max-height: 80px;
	width: auto;
	height: auto;
	display: block;
	filter: brightness(0) invert(1); /* white logo on top of hero */
	transition: filter var(--transition-base);
}

/* Desktop: Dark logo when scrolled-dark */
@media (min-width: 769px) {
	.site-header.scrolled-dark .logo-image {
		/* Keep desktop header visuals unchanged on sticky scroll */
		filter: brightness(0) invert(1);
	}
}

.site-title {
	font-family: var(--font-serif);
	font-size: var(--font-size-logo);
	font-weight: 400;
	letter-spacing: var(--letter-spacing-tight);
}

.site-title a {
	text-decoration: none;
	color: var(--color-white);
	transition: color var(--transition-base);
}

/* Desktop: Dark title when scrolled-dark */
@media (min-width: 769px) {
	.site-header.scrolled-dark .site-title a {
		/* Keep desktop header visuals unchanged on sticky scroll */
		color: var(--color-white);
	}
}

.site-title a:hover {
	color: var(--color-white);
	opacity: 0.8;
}

/* Mobile menu toggle button (invisible overlay) */
.mobile-menu-toggle {
	display: none;
	background: none;
	border: none;
	padding: 0;
	cursor: pointer;
}

@media (max-width: 768px) {
	.mobile-menu-toggle {
		display: block;
		position: absolute;
		top: 0;
		left: 0;
		width: 100%;
		height: 100%;
		z-index: 3;
	}

	/* Show "Menu" label instead of logo/title on mobile */
	.site-branding {
		position: relative;
		display: flex;
		align-items: flex-start;
		cursor: pointer;
		z-index: 10;
	}

	.site-branding .site-logo,
	.site-branding .site-title {
		display: none;
	}

	.site-branding::before {
		content: "Menu";
		color: var(--color-white);
		font-family: var(--font-primary);
		font-size: 22px;
		font-weight: 500;
		letter-spacing: 0.01em;
		padding-top: 5px;
		display: block;
		position: relative;
		z-index: 2;
		pointer-events: none;
	}

	.site-branding::after {
		content: "";
		position: absolute;
		top: 0;
		left: 0;
		width: 270%;
		height: 1px;
		background-color: var(--color-white);
		display: block;
		z-index: 1;
		pointer-events: none;
	}
}

/* Screen reader utility */
.screen-reader-text {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border-width: 0;
}

/* =========================
   Navigation (3-column)
   ========================= */

.main-navigation {
	display: flex;
	align-items: flex-start;
}

.nav-container {
	display: flex;
	gap: var(--spacing-md);
	align-items: flex-start;
}

.nav-column {
	display: flex;
	flex-direction: column;
	min-width: 180px;
	border-top: 1px solid var(--color-white);
	padding-top: 10px;
}

.nav-menu {
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
	margin: 0;
	padding: 0;
}

.nav-menu li {
	margin: 0;
	padding: 0;
	position: relative;
}

.nav-menu a {
	display: block;
	color: var(--color-white);
	text-decoration: none;
	transition: transform var(--transition-base), color var(--transition-base), opacity var(--transition-base);
	position: relative;
	font-size: 24px;
	font-weight: 500;
	letter-spacing: var(--letter-spacing-tight);
	line-height: 1.1;
}

.nav-menu a:hover {
	transform: translateX(4px);
	color: var(--color-white);
	opacity: 0.9;
}

/* Mobile header: use Contact menu instead of Tertiary menu */
.nav-tertiary-mobile-menu {
	display: none;
}

/* Desktop: Dark navigation items when scrolled-dark */
@media (min-width: 769px) {
	.site-header.scrolled-dark .nav-menu a {
		/* Keep desktop header visuals unchanged on sticky scroll */
		color: var(--color-white);
	}

	.site-header.scrolled-dark .nav-menu a:hover {
		color: var(--color-white);
		opacity: 0.9;
	}

	.site-header.scrolled-dark .nav-column {
		border-top-color: var(--color-white);
	}
}

/* Responsive Navigation */
@media (max-width: 768px) {
	.nav-tertiary-desktop-menu {
		display: none;
	}

	.nav-tertiary-mobile-menu {
		display: block;
	}

	.nav-container {
		flex-direction: row;
		justify-content: space-between;
		width: 100%;
		gap: 0;
	}

	.nav-column {
		width: auto;
		min-width: auto;
	}

	.nav-column.nav-tertiary {
		border-top: none;
		padding-top: 5px;
		position: relative;
	}

	.nav-column.nav-tertiary::after {
		content: "";
		position: absolute;
		top: 0;
		right: 0;
		width: 220%;
		height: 1px;
		background-color: var(--color-white);
		display: block;
	}

	.nav-column.nav-primary,
	.nav-column.nav-secondary {
		display: none;
	}

	.nav-menu a {
		padding: 0;
		font-size: 22px;
	}
}

/* Mobile dark mode styles tied to scrolled-dark */
@media (max-width: 768px) {
	.site-header.scrolled-dark .site-branding::before {
		/* Keep mobile header visuals unchanged on scroll */
		color: var(--color-white);
	}

	.site-header.scrolled-dark .site-branding::after {
		background-color: var(--color-white);
	}

	.site-header.scrolled-dark .nav-column.nav-tertiary .nav-menu a {
		color: var(--color-white);
	}

	.site-header.scrolled-dark .nav-column.nav-tertiary .nav-menu a:hover {
		color: var(--color-white);
		opacity: 0.9;
	}

	.site-header.scrolled-dark .nav-column.nav-tertiary::after {
		background-color: var(--color-white);
	}
}

/* =========================
   Mobile menu overlay
   ========================= */

.mobile-menu-overlay {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	width: 100vw;
	height: 100vh;
	background-color: transparent;
	z-index: 9999;
	opacity: 0;
	visibility: hidden;
	transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu-overlay.active {
	opacity: 1;
	visibility: visible;
}

.mobile-menu-container {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	width: 100vw;
	height: 100vh;
	padding: var(--spacing-sm);
	background-color: var(--color-background);
	border-left: 2px solid rgba(252, 252, 252, 0.18);
	border-top: 2px solid rgba(252, 252, 252, 0.18);
	border-bottom: 2px solid rgba(252, 252, 252, 0.18);
	transform: translateX(-100%);
	transition: transform var(--transition-base);
	overflow-y: auto;
	z-index: 10000;
	display: flex;
	flex-direction: column;
	box-sizing: border-box;
}

.mobile-menu-overlay.active .mobile-menu-container {
	transform: translateX(0);
}

.mobile-menu {
	padding: 0;
	margin: 0;
	flex: 1;
	display: flex;
	flex-direction: column;
	position: relative;
}

.mobile-menu-close {
	position: absolute;
	top: 0;
	right: 0;
	padding: 0;
	background: none;
	border: none;
	color: var(--color-white);
	font-family: var(--font-primary);
	font-size: 22px;
	font-weight: 500;
	cursor: pointer;
	transition: opacity var(--transition-base);
	z-index: 10;
	height: 1.5em;
	display: flex;
	align-items: center;
	margin-top: 5px;
	letter-spacing: var(--letter-spacing-tight);
	pointer-events: auto;
}

.mobile-menu-close::after {
	content: "";
	position: absolute;
	top: 0;
	left: -105px;
	width: 300%;
	height: 1px;
	background-color: var(--color-white);
	display: block;
	z-index: 1;
	pointer-events: none;
	margin-top: -5px;
}

.mobile-menu-close:hover {
	opacity: 0.8;
}

.mobile-menu-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	width: 100%;
	gap: 12px;
}

.mobile-menu-list li {
	margin: 0;
	padding: 0;
	position: relative;
	max-width: fit-content;
}

.mobile-menu-list li:first-child {
	position: relative;
	padding-right: 60px; /* space for close button */
	margin-top: 9px;
}

.mobile-menu-list li:first-child::before {
	content: "";
	position: absolute;
	top: 0;
	left: 0;
	width: 140%;
	height: 1px;
	background-color: var(--color-white);
	display: block;
	z-index: 1;
	pointer-events: none;
	margin-top: -9px;
}

.mobile-menu-list a {
	display: block;
	color: var(--color-white);
	font-family: var(--font-primary);
	font-size: 22px;
	font-weight: 400;
	text-decoration: none;
	transition: background-color var(--transition-base), color var(--transition-base);
	width: fit-content;
	line-height: 1.1;
}

.mobile-menu-list a:hover,
.mobile-menu-list a:focus {
	background-color: rgba(255, 255, 255, 0.1);
	color: var(--color-white);
}

/* Allow the overlay to also reflect scrolled-dark */
@media (max-width: 768px) {
	.site-header.scrolled-dark .mobile-menu-list a,
	.mobile-menu-overlay.scrolled-dark .mobile-menu-list a {
		/* Keep mobile menu visuals unchanged on scroll */
		color: var(--color-white);
	}

	.site-header.scrolled-dark .mobile-menu-close,
	.mobile-menu-overlay.scrolled-dark .mobile-menu-close {
		color: var(--color-white);
	}

	.site-header.scrolled-dark .mobile-menu-close::after,
	.mobile-menu-overlay.scrolled-dark .mobile-menu-close::after {
		background-color: var(--color-white);
	}

	.site-header.scrolled-dark .mobile-menu-list li:first-child::before,
	.mobile-menu-overlay.scrolled-dark .mobile-menu-list li:first-child::before {
		background-color: var(--color-white);
	}
}