/* ==========================================================================
   Valident Basic — Header
   ========================================================================== */

.site-header {
	background-color: var(--vb-color-header-bg);
	color: var(--vb-color-header-fg);
	height: var(--vb-header-height);
	position: sticky;
	top: 0;
	z-index: 100;
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: 100%;
	max-width: 1400px;
	margin: 0 auto;
	padding: 0 24px;
}

/* Branding / Logo
   ========================================================================== */

.site-branding {
	flex-shrink: 0;
}

.site-branding a,
.site-branding a:hover {
	display: flex;
	align-items: center;
	color: var(--vb-color-header-fg);
	text-decoration: none;
}

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

.site-branding .custom-logo {
	max-height: calc(var(--vb-header-height) - 20px);
	width: auto;
}

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

.site-branding__default-logo svg {
	height: calc(var(--vb-header-height) - 40px);
	width: auto;
	color: var(--vb-color-header-fg);
}

.site-branding__default-logo:hover {
	text-decoration: none;
}

.site-branding__title {
	font-family: var(--vb-font-heading);
	font-size: 1.5rem;
	font-weight: 700;
	color: var(--vb-color-header-fg);
}

.site-branding__title:hover {
	text-decoration: none;
}

/* Desktop Navigation
   ========================================================================== */

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

.site-navigation__list {
	display: flex;
	align-items: center;
	gap: 8px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.site-navigation__list li {
	position: relative;
}

.site-navigation__list a {
	display: block;
	padding: 8px 16px;
	font-family: var(--vb-font-nav);
	font-size: 0.9375rem;
	font-weight: 500;
	color: var(--vb-color-header-fg);
	text-decoration: none;
	border-radius: 4px;
	transition: background-color 0.2s ease, color 0.2s ease;
}

.site-navigation__list a:hover,
.site-navigation__list a:focus-visible,
.site-navigation__list .current-menu-item > a {
	background-color: rgba(0, 0, 0, 0.06);
	text-decoration: none;
}

.site-navigation__list a:focus-visible {
	outline: 2px solid var(--vb-color-highlight, #2563eb);
	outline-offset: -2px;
}

/* Dropdown (depth 2) */
.site-navigation__list .sub-menu {
	display: none;
	position: absolute;
	top: 100%;
	right: 0;
	min-width: 200px;
	background: var(--vb-color-header-bg);
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
	border-radius: 4px;
	padding: 8px 0;
	list-style: none;
	z-index: 101;
}

.site-navigation__list li:hover > .sub-menu,
.site-navigation__list li:focus-within > .sub-menu {
	display: block;
}

.site-navigation__list .sub-menu a {
	padding: 8px 20px;
	font-size: 0.875rem;
	border-radius: 0;
}

/* Hamburger — hidden on desktop
   ========================================================================== */

.mobile-menu-toggle {
	display: none;
}

/* Responsive
   ========================================================================== */

@media (max-width: 768px) {
	.site-header__inner {
		padding: 0 16px;
	}

	.site-navigation {
		display: none;
	}

	.mobile-menu-toggle {
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		gap: 5px;
		width: 40px;
		height: 40px;
		padding: 8px;
		cursor: pointer;
		background: none;
		border: none;
		z-index: 10;
	}

	.hamburger-line {
		display: block;
		width: 22px;
		height: 2px;
		background-color: var(--vb-color-header-fg);
		border-radius: 2px;
		transition: transform 0.3s ease, opacity 0.3s ease;
	}

	/* Animate to X when menu is open */
	body.is-menu-open .hamburger-line:nth-child(1) {
		transform: translateY(7px) rotate(45deg);
	}

	body.is-menu-open .hamburger-line:nth-child(2) {
		opacity: 0;
	}

	body.is-menu-open .hamburger-line:nth-child(3) {
		transform: translateY(-7px) rotate(-45deg);
	}
}