/* ============================================================
   Upskilling Theme — Responsive Header Navigation
   shadcn/ui-inspired Navigation Menu
   ============================================================ */

:root {
	--header-height: 64px;
	--header-bg: #ffffff;
	--header-border: hsl(240 5.9% 90%);
	--nav-text: hsl(240 10% 3.9%);
	--nav-text-muted: hsl(240 3.8% 46.1%);
	--nav-accent: hsl(240 4.8% 95.9%);
	--nav-item-radius: 6px;
	--nav-dropdown-bg: #ffffff;
	--nav-dropdown-border: hsl(240 5.9% 90%);
	--nav-dropdown-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.06);
	--nav-dropdown-radius: 8px;
	--cta-bg: #f97316;
	--cta-bg-hover: #ea6c0a;
	--cta-text: #ffffff;
	--cta-radius: 6px;
	--login-text: hsl(240 10% 3.9%);
	--login-text-muted: hsl(240 3.8% 46.1%);
}

/* ============================
   Site Header
   ============================ */

.site-header {
	position: sticky;
	top: 0;
	z-index: 1000;
	background-color: var(--header-bg);
	border-bottom: 1px solid var(--header-border);
	display: block; /* override theme default flex */
}

.header-inner {
	max-width: 1280px;
	margin-inline: auto;
	padding-inline: 1.5rem;
	height: var(--header-height);
	display: flex;
	align-items: center;
	gap: 1.5rem;
	position: relative;
}

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

.site-branding {
	flex-shrink: 0;
	display: flex;
	align-items: center;
}

.site-logo-link {
	display: flex;
	align-items: center;
	text-decoration: none;
	color: var(--nav-text);
}

.site-logo-link img,
.site-logo-link .custom-logo {
	display: block;
	height: 36px;
	width: auto;
	max-width: 180px;
	object-fit: contain;
}

.site-title-text {
	font-size: 1.125rem;
	font-weight: 700;
	letter-spacing: -0.02em;
	color: var(--nav-text);
	white-space: nowrap;
	line-height: 1;
}

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

.site-navigation {
	flex: 1;
	display: flex;
	align-items: center;
}

.site-navigation .nav-menu {
	display: flex;
	align-items: center;
	list-style: none;
	margin: 0;
	padding: 0;
	gap: 0.125rem;
}

.site-navigation .nav-menu .menu-item {
	position: relative;
	display: flex;
	align-items: center;
}

.site-navigation .nav-menu .menu-item > a {
	display: inline-flex;
	align-items: center;
	gap: 0.25rem;
	padding: 0.5rem 0.75rem;
	font-size: 0.9375rem;
	font-weight: 500;
	color: var(--nav-text-muted);
	text-decoration: none;
	border-radius: var(--nav-item-radius);
	transition: color 0.15s ease, background-color 0.15s ease;
	white-space: nowrap;
	line-height: 1.25;
}

.site-navigation .nav-menu .menu-item > a:hover,
.site-navigation .nav-menu .menu-item > a:focus-visible {
	color: var(--nav-text);
	background-color: var(--nav-accent);
	outline: none;
}

.site-navigation .nav-menu .current-menu-item > a,
.site-navigation .nav-menu .current-menu-parent > a,
.site-navigation .nav-menu .current-menu-ancestor > a {
	color: var(--nav-text);
}

/* Chevron indicator for parent items */
.site-navigation .nav-menu .menu-item-has-children > a::after {
	content: '';
	display: inline-block;
	width: 12px;
	height: 12px;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-size: contain;
	transition: transform 0.2s ease;
	flex-shrink: 0;
	margin-inline-start: 0.1rem;
}

.site-navigation .nav-menu .menu-item-has-children.is-open > a::after {
	transform: rotate(180deg);
}

/* ============================
   Dropdown Submenu
   ============================ */

.site-navigation .nav-menu .sub-menu {
	position: absolute;
	top: calc(100% + 8px);
	left: 0;
	min-width: 200px;
	list-style: none;
	margin: 0;
	padding: 0.375rem;
	background: var(--nav-dropdown-bg);
	border: 1px solid var(--nav-dropdown-border);
	border-radius: var(--nav-dropdown-radius);
	box-shadow: var(--nav-dropdown-shadow);
	z-index: 100;
	opacity: 0;
	visibility: hidden;
	transform: scale(0.96) translateY(-6px);
	transform-origin: top left;
	transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
	pointer-events: none;
}

.site-navigation .nav-menu .menu-item-has-children.is-open > .sub-menu {
	opacity: 1;
	visibility: visible;
	transform: scale(1) translateY(0);
	pointer-events: auto;
}

.site-navigation .nav-menu .sub-menu .menu-item {
	display: block;
}

.site-navigation .nav-menu .sub-menu .menu-item > a {
	display: block;
	width: 100%;
	padding: 0.5rem 0.75rem;
	font-size: 0.875rem;
	font-weight: 400;
	color: var(--nav-text);
	text-decoration: none;
	border-radius: 4px;
	transition: background-color 0.1s ease;
	white-space: nowrap;
}

.site-navigation .nav-menu .sub-menu .menu-item > a:hover,
.site-navigation .nav-menu .sub-menu .menu-item > a:focus-visible {
	background-color: var(--nav-accent);
	outline: none;
}

/* Nested sub-menus */
.site-navigation .nav-menu .sub-menu .sub-menu {
	top: -0.375rem;
	left: calc(100% + 4px);
	transform-origin: top left;
}

/* ============================
   Header Actions (CTA + Toggle)
   ============================ */

.header-actions {
	display: flex;
	align-items: center;
	gap: 0.625rem;
	flex-shrink: 0;
	margin-inline-start: auto;
}

/* ============================
   Login Link
   ============================ */

.header-login-link {
	display: inline-flex;
	align-items: center;
	padding: 0.5rem 0.625rem;
	font-size: 0.9375rem;
	font-weight: 500;
	color: var(--login-text-muted);
	text-decoration: none;
	border-radius: var(--nav-item-radius);
	white-space: nowrap;
	transition: color 0.15s ease, background-color 0.15s ease;
}

.header-login-link:hover,
.header-login-link:focus-visible {
	color: var(--login-text);
	background-color: var(--nav-accent);
	outline: none;
}

/* ============================
   CTA Button
   ============================ */

.header-cta-btn {
	display: inline-flex;
	align-items: center;
	gap: 0.375rem;
	padding: 0.5rem 1.125rem;
	font-size: 0.875rem;
	font-weight: 500;
	color: var(--cta-text);
	background-color: var(--cta-bg);
	border-radius: var(--cta-radius);
	text-decoration: none;
	white-space: nowrap;
	line-height: 1.25;
	transition: opacity 0.15s ease;
	border: 1px solid transparent;
}

.header-cta-btn:hover {
	background-color: var(--cta-bg-hover);
	opacity: 1;
	color: var(--cta-text);
}

.header-cta-btn:focus-visible {
	outline: 2px solid var(--cta-bg);
	outline-offset: 2px;
	opacity: 1;
}

.cta-btn-icon {
	display: flex;
	align-items: center;
	flex-shrink: 0;
}

.cta-btn-icon svg {
	width: 1em;
	height: 1em;
}

/* ============================
   Mobile Toggle Button
   ============================ */

.nav-toggle {
	display: none;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	gap: 5px;
	width: 40px;
	height: 40px;
	padding: 8px;
	background: transparent;
	border: 1px solid var(--header-border);
	border-radius: var(--nav-item-radius);
	cursor: pointer;
	transition: background-color 0.15s ease;
	flex-shrink: 0;
}

.nav-toggle:hover {
	background-color: var(--nav-accent);
}

.nav-toggle-bar {
	display: block;
	width: 18px;
	height: 2px;
	background-color: var(--nav-text);
	border-radius: 2px;
	transition: transform 0.25s ease, opacity 0.25s ease;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
	opacity: 0;
	transform: scaleX(0);
}

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

/* ============================
   Mobile Responsive (≤ 768px)
   ============================ */

@media (max-width: 768px) {
	.nav-toggle {
		display: flex;
	}

	.site-navigation {
		display: none;
		position: absolute;
		top: var(--header-height);
		left: 0;
		right: 0;
		background-color: var(--header-bg);
		border-bottom: 1px solid var(--header-border);
		padding: 0.75rem 1.5rem 1.25rem;
		z-index: 999;
		box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.06);
		flex-direction: column;
		align-items: stretch;
	}

	.site-navigation.is-open {
		display: flex;
	}

	.site-navigation .nav-menu {
		flex-direction: column;
		align-items: stretch;
		gap: 0;
	}

	.site-navigation .nav-menu .menu-item {
		display: block;
	}

	.site-navigation .nav-menu .menu-item > a {
		display: flex;
		width: 100%;
		padding: 0.625rem 0.5rem;
		font-size: 1rem;
		border-radius: 4px;
	}

	/* Mobile dropdowns: stack inline below parent */
	.site-navigation .nav-menu .sub-menu {
		position: static;
		opacity: 1;
		visibility: visible;
		transform: none;
		box-shadow: none;
		border: none;
		border-left: 2px solid var(--header-border);
		border-radius: 0;
		padding: 0.25rem 0 0.25rem 0.875rem;
		margin-top: 0.125rem;
		display: none;
		pointer-events: auto;
	}

	.site-navigation .nav-menu .menu-item-has-children.is-open > .sub-menu {
		display: block;
	}

	.site-navigation .nav-menu .sub-menu .menu-item > a {
		white-space: normal;
	}
}

@media (max-width: 480px) {
	.header-login-link {
		display: none;
	}

	.header-cta-btn .cta-btn-text {
		display: none;
	}

	.header-cta-btn {
		padding: 0.5rem;
		aspect-ratio: 1;
		justify-content: center;
	}

	.header-cta-btn .cta-btn-icon {
		font-size: 1.125rem;
	}
}