/* =====================================================================
   Phartenaas — header.css
   Double-rule sticky nav, hamburger, mobile overlay
   ===================================================================== */

.header {
	background: var(--c-bg);
	height: var(--header-h);
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 100;
	border-top: 1px solid var(--c-border);
	border-bottom: 1px solid var(--c-border);
	transition: border-bottom-color var(--dur) var(--ease);
}

.header--scrolled {
	border-bottom-color: var(--c-accent);
}

.header__inner {
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--s-24);
}

.header__brand {
	font-family: var(--f-heading);
	font-style: italic;
	font-weight: 500;
	font-size: 1.375rem;
	color: var(--c-text);
	letter-spacing: 0;
	text-decoration: none;
	flex-shrink: 0;
}

.header__brand:hover {
	color: var(--c-accent);
}

/* ---------- Desktop nav ---------- */
.header__nav {
	display: none;
}

@media (min-width: 1024px) {
	.header__nav {
		display: flex;
		align-items: center;
		gap: 0;
	}
}

.header__nav-list {
	display: flex;
	align-items: center;
	gap: 0;
}

.header__nav-item {
	position: relative;
}

.header__nav-item a {
	font-family: var(--f-body);
	font-weight: 500;
	font-size: 0.75rem;
	letter-spacing: 1.5px;
	text-transform: uppercase;
	color: var(--c-text);
	padding: var(--s-8) var(--s-8);
	transition: color var(--dur) var(--ease);
	display: inline-block;
}

.header__nav-item a:hover,
.header__nav-item a.is-current {
	color: var(--c-accent);
}

.header__nav-item + .header__nav-item::before {
	content: '\00B7';
	padding: 0 var(--s-8);
	color: var(--c-border);
	display: inline-block;
}

/* Utility nav (desktop-only small links) */
.header__utility {
	display: none;
	margin-left: var(--s-24);
	gap: 0;
}

@media (min-width: 1280px) {
	.header__utility {
		display: flex;
		align-items: center;
	}
}

.header__utility a {
	font-family: var(--f-body);
	font-weight: 500;
	font-size: 0.6875rem;
	letter-spacing: 1.5px;
	text-transform: uppercase;
	color: var(--c-text-dim);
	padding: var(--s-4) var(--s-8);
}

.header__utility a:hover {
	color: var(--c-accent);
}

.header__utility > * + *::before {
	content: '\00B7';
	padding: 0 var(--s-8);
	color: var(--c-border);
}

/* ---------- Hamburger ---------- */
.header__hamburger {
	display: inline-flex;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 40px;
	height: 40px;
	padding: 0;
	background: transparent;
	border: none;
	cursor: pointer;
	align-items: center;
}

.header__hamburger span {
	display: block;
	width: 22px;
	height: 1.5px;
	background: var(--c-text);
	transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
	border-radius: 1px;
}

.header__hamburger[aria-expanded="true"] span:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}

.header__hamburger[aria-expanded="true"] span:nth-child(2) {
	opacity: 0;
}

.header__hamburger[aria-expanded="true"] span:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1024px) {
	.header__hamburger {
		display: none;
	}
}

/* ---------- Mobile overlay ---------- */
.mobile-nav {
	position: fixed;
	inset: 0;
	background: var(--c-bg);
	z-index: 99;
	padding: calc(var(--header-h) + var(--s-32)) var(--s-24) var(--s-40);
	transform: translateY(-100%);
	transition: transform var(--dur) var(--ease);
	overflow-y: auto;
	visibility: hidden;
}

.mobile-nav.is-open {
	transform: translateY(0);
	visibility: visible;
}

@media (min-width: 1024px) {
	.mobile-nav {
		display: none;
	}
}

.mobile-nav__list {
	display: flex;
	flex-direction: column;
	gap: 0;
}

.mobile-nav__list li {
	border-bottom: 1px solid var(--c-border);
}

.mobile-nav__list li:first-child {
	border-top: 1px solid var(--c-border);
}

.mobile-nav__list a {
	display: block;
	padding: var(--s-16) 0;
	font-family: var(--f-heading);
	font-weight: 500;
	font-size: 1.5rem;
	color: var(--c-text);
	letter-spacing: 0;
}

.mobile-nav__list a:hover {
	color: var(--c-accent);
}

.mobile-nav__cta {
	margin-top: var(--s-40);
}

.mobile-nav__meta {
	margin-top: var(--s-40);
	padding-top: var(--s-24);
	border-top: 1px solid var(--c-border);
	color: var(--c-text-dim);
	font-size: 0.875rem;
	line-height: 1.8;
}

.mobile-nav__meta a {
	color: var(--c-text);
}