/**
 * Site header / navigation.
 */
.site-header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	height: var(--header-height);
	display: flex;
	align-items: center;
	background: transparent;
	border-bottom: 1px solid transparent;
	transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.site-header.is-scrolled {
	background: rgba(5, 7, 13, 0.78);
	backdrop-filter: blur(14px);
	-webkit-backdrop-filter: blur(14px);
	border-bottom-color: var(--color-border);
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1.5rem;
	width: 100%;
}

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

.site-header__logo,
.custom-logo-link {
	font-family: var(--font-heading);
	font-weight: 700;
	font-size: 1.25rem;
	letter-spacing: -0.01em;
	color: var(--color-text);
}

.site-header__logo::after {
	content: '.nl';
	color: var(--color-accent);
}

.site-header__nav {
	display: none;
}

.site-header__menu {
	display: flex;
	align-items: center;
	gap: 2rem;
}

.menu-item__link,
.site-header__menu > .menu-item > a {
	position: relative;
	font-size: 0.95rem;
	color: var(--color-text-muted);
	padding: 0.4rem 0.1rem;
	transition: color var(--transition-fast);
}

.menu-item__link::after,
.site-header__menu > .menu-item > a::after {
	content: '';
	position: absolute;
	left: 0;
	bottom: -2px;
	width: 0;
	height: 1.5px;
	background: var(--gradient-accent);
	transition: width var(--transition-fast);
}

.menu-item__link:hover,
.site-header__menu > .menu-item > a:hover,
.menu-item__link:focus-visible,
.site-header__menu > .menu-item > a:focus-visible {
	color: var(--color-text);
}

.menu-item__link:hover::after,
.site-header__menu > .menu-item > a:hover::after {
	width: 100%;
}

.site-header__actions {
	display: flex;
	align-items: center;
	gap: 1rem;
}

.site-header__cta {
	display: none;
}

.site-header__toggle {
	position: relative;
	width: 40px;
	height: 40px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 5px;
	background: var(--color-bg-elevated);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-sm);
}

.site-header__toggle-bar {
	width: 18px;
	height: 2px;
	background: var(--color-text);
	border-radius: 2px;
	transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(2) {
	transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(3) {
	opacity: 0;
}

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(4) {
	transform: translateY(-7px) rotate(-45deg);
}

/* Mobile full-screen overlay menu */
.mobile-menu {
	position: fixed;
	inset: 0;
	top: var(--header-height);
	background: rgba(5, 7, 13, 0.98);
	backdrop-filter: blur(10px);
	display: flex;
	flex-direction: column;
	justify-content: center;
	gap: 2.5rem;
	padding: 2rem var(--container-padding) 3rem;
	transform: translateY(-12px);
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transition: opacity var(--transition-slow), transform var(--transition-slow), visibility 0s linear var(--transition-slow);
	z-index: 999;
}

.mobile-menu.is-open {
	opacity: 1;
	transform: translateY(0);
	visibility: visible;
	pointer-events: auto;
	transition: opacity var(--transition-slow), transform var(--transition-slow), visibility 0s linear 0s;
}

.mobile-menu__list {
	display: flex;
	flex-direction: column;
	gap: 1.5rem;
}

.mobile-menu__list .menu-item__link,
.mobile-menu__list > .menu-item > a {
	font-family: var(--font-heading);
	font-size: 1.9rem;
	color: var(--color-text);
}

.mobile-menu__cta {
	align-self: flex-start;
}

body.mobile-menu-open {
	overflow: hidden;
}