/* ============================================================
   Site header + primary navigation
   ============================================================ */

.site-header {
	background: var(--color-bg);
	border-bottom: 1px solid var(--color-border);
	position: sticky;
	top: 0;
	z-index: 50;
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-3);
	padding-block: var(--space-2);
}

.site-branding { display: flex; align-items: center; gap: var(--space-2); }
.site-logo img { max-height: 56px; width: auto; }
.site-title {
	margin: 0;
	font-size: 1.25rem;
	font-family: var(--font-heading);
}
.site-title a { color: var(--color-text); text-decoration: none; }
.site-description { margin: 0; font-size: 0.85rem; color: var(--color-muted); }

/* Nav */
.site-nav { display: flex; align-items: center; }

.primary-menu {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	align-items: center;
	gap: var(--space-3);
}
.primary-menu > li { position: relative; }
.primary-menu a {
	color: var(--color-text);
	text-decoration: none;
	padding: 0.5rem 0;
	display: inline-block;
	font-weight: 500;
}
.primary-menu a:hover,
.primary-menu .current-menu-item > a { color: var(--color-primary); }

.sub-menu {
	position: absolute;
	top: 100%;
	left: 0;
	background: #fff;
	border: 1px solid var(--color-border);
	list-style: none;
	margin: 0;
	padding: var(--space-1) 0;
	min-width: 200px;
	display: none;
	z-index: 60;
}
.primary-menu li:hover > .sub-menu,
.primary-menu li:focus-within > .sub-menu,
.primary-menu .menu-item-has-children.is-open > .sub-menu { display: block; }
.sub-menu a { display: block; padding: 0.5rem var(--space-2); }

.submenu-toggle {
	background: transparent;
	color: var(--color-text);
	padding: 0.25rem 0.5rem;
	border-radius: var(--radius);
	font-size: 0.9rem;
	line-height: 1;
	margin-left: 0.25rem;
}
.submenu-toggle[aria-expanded="true"] { background: var(--color-accent); }

/* Toggle */
.site-nav__toggle {
	display: none;
	background: transparent;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	padding: 0.5rem;
	flex-direction: column;
	gap: 4px;
	width: 40px;
	height: 40px;
	align-items: center;
	justify-content: center;
}
.site-nav__toggle-bar {
	display: block;
	width: 20px;
	height: 2px;
	background: var(--color-text);
	transition: transform var(--transition), opacity var(--transition);
}

/* Mobile */
@media (max-width: 782px) {
	.site-nav__toggle { display: inline-flex; }

	.primary-menu {
		position: fixed;
		inset: 64px 0 0 0;
		background: var(--color-bg);
		flex-direction: column;
		align-items: stretch;
		padding: var(--space-3);
		gap: 0;
		transform: translateX(100%);
		transition: transform var(--transition);
		overflow-y: auto;
	}
	.site-nav.is-open .primary-menu { transform: translateX(0); }

	.primary-menu > li { border-bottom: 1px solid var(--color-border); }
	.primary-menu a { padding: 0.9rem 0; }

	.sub-menu {
		position: static;
		border: 0;
		padding-left: var(--space-2);
	}
	.primary-menu .menu-item-has-children.is-open > .sub-menu { display: block; }
	.primary-menu .menu-item-has-children > .sub-menu { display: none; }

	.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
	.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(2) { opacity: 0; }
	.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}