/* EWB Courses — site header (sticky, mega menu, mobile drawer) */

.site-header {
	position: sticky;
	top: 0;
	z-index: var(--z-header);
	background: rgba(10, 19, 48, 0.92);
	border-bottom: 1px solid transparent;
	transition:
		background-color var(--dur) var(--ease),
		box-shadow var(--dur) var(--ease),
		border-color var(--dur) var(--ease),
		backdrop-filter var(--dur) var(--ease);
}

body.scrolled .site-header {
	background: rgba(10, 19, 48, 0.85);
	-webkit-backdrop-filter: saturate(160%) blur(14px);
	backdrop-filter: saturate(160%) blur(14px);
	border-bottom-color: var(--color-border);
	box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-4);
	min-height: var(--header-h-sm);
}

@media (min-width: 1024px) {
	.site-header__inner { min-height: var(--header-h); }
}

.site-header__brand {
	flex: 0 0 auto;
	display: flex;
	align-items: center;
}

.site-header__logo-link {
	display: inline-flex;
	align-items: center;
	line-height: 0;
}

.site-header__logo-link img,
.site-header__logo-link .ewb-logo {
	height: 40px;
	width: auto;
}

@media (min-width: 1024px) {
	.site-header__logo-link img,
	.site-header__logo-link .ewb-logo {
		height: 48px;
	}
}

/* ---------- Mobile toggle ---------- */
.site-header__menu-toggle {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	border-radius: var(--radius-md);
	border: 1px solid var(--color-border-strong);
	background: rgba(255,255,255,0.04);
	margin-inline-start: auto;
}

.hamburger {
	position: relative;
	display: inline-block;
	width: 22px;
	height: 16px;
}
.hamburger span {
	position: absolute;
	left: 0;
	right: 0;
	height: 2px;
	background: var(--white);
	border-radius: 2px;
	transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease), top var(--dur) var(--ease);
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 7px; }
.hamburger span:nth-child(3) { top: 14px; }

.site-header__menu-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
	top: 7px;
	transform: rotate(45deg);
}
.site-header__menu-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
	opacity: 0;
}
.site-header__menu-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
	top: 7px;
	transform: rotate(-45deg);
}

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

/* ---------- Nav ---------- */
.site-nav {
	display: none;
	align-items: center;
	gap: var(--space-5);
}

.site-nav__list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	gap: var(--space-5);
	align-items: center;
}

.site-nav__list a {
	color: var(--white);
	font-family: var(--font-display);
	font-weight: var(--fw-semibold);
	font-size: var(--fs-small);
	padding: 0.5rem 0;
	position: relative;
}

.site-nav__list a:hover,
.site-nav__list a:focus-visible,
.site-nav__list .current-menu-item > a {
	color: var(--cyan);
}

.site-nav__list a::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: -2px;
	height: 2px;
	background: var(--cyan);
	transform: scaleX(0);
	transform-origin: left center;
	transition: transform var(--dur) var(--ease);
}
.site-nav__list a:hover::after,
.site-nav__list .current-menu-item > a::after {
	transform: scaleX(1);
}

/* ---------- Mega menu / submenu ---------- */
.site-nav__list .menu-item-has-children {
	position: relative;
}

.site-nav__list .menu-item-has-children > a::before {
	content: "";
	display: inline-block;
	width: 8px;
	height: 8px;
	margin-inline-end: 6px;
	border-right: 2px solid currentColor;
	border-bottom: 2px solid currentColor;
	transform: rotate(45deg) translateY(-2px);
	opacity: 0.7;
}

.site-nav__list .sub-menu {
	position: absolute;
	top: 100%;
	inset-inline-start: 0;
	min-width: 260px;
	background: var(--color-bg-alt);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	padding: var(--space-3);
	margin: 0;
	list-style: none;
	display: grid;
	gap: var(--space-1);
	box-shadow: var(--shadow-2);
	opacity: 0;
	visibility: hidden;
	transform: translateY(8px);
	transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
	z-index: var(--z-menu);
}

.site-nav__list .menu-item-has-children:hover > .sub-menu,
.site-nav__list .menu-item-has-children:focus-within > .sub-menu {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

.site-nav__list .sub-menu a {
	display: block;
	padding: 0.5rem 0.75rem;
	border-radius: var(--radius-sm);
	font-weight: var(--fw-medium);
}

.site-nav__list .sub-menu a:hover {
	background: rgba(0, 184, 255, 0.08);
	color: var(--white);
}

.site-nav__list .sub-menu a::after { display: none; }

/* ---------- CTA inside nav ---------- */
.site-nav__cta {
	display: inline-flex;
	align-items: center;
}

/* ---------- Desktop layout ---------- */
@media (min-width: 1024px) {
	.site-nav {
		display: flex;
	}
}

/* ---------- Mobile drawer (<1024px) ---------- */
@media (max-width: 1023px) {
	.site-nav {
		position: fixed;
		inset: var(--header-h-sm) 0 0 0;
		background: var(--navy-deep);
		flex-direction: column;
		align-items: stretch;
		gap: 0;
		padding: var(--space-6) var(--container-px) var(--space-8);
		overflow-y: auto;
		transform: translateX(100%);
		transition: transform var(--dur) var(--ease);
		z-index: var(--z-menu);
	}

	.site-nav.is-open {
		display: flex;
		transform: translateX(0);
	}

	.site-nav__list {
		flex-direction: column;
		gap: var(--space-1);
		align-items: stretch;
		border-bottom: 1px solid var(--color-border);
		padding-bottom: var(--space-5);
		margin-bottom: var(--space-5);
	}

	.site-nav__list a {
		display: block;
		padding: var(--space-3) 0;
		font-size: 1.125rem;
	}

	.site-nav__list a::after { display: none; }

	.site-nav__list .sub-menu {
		position: static;
		opacity: 1;
		visibility: visible;
		transform: none;
		background: transparent;
		border: 0;
		box-shadow: none;
		padding: 0 0 0 var(--space-4);
		display: grid;
		gap: 0;
	}

	.site-nav__list .sub-menu a {
		font-size: var(--fs-small);
		padding: 0.5rem 0;
	}
}