/**
 * Navigation Component
 * Site navigation bar with mobile menu
 * Implements specifications from TECHTRONIC_DESIGN_SYSTEM.md Section 7.3
 *
 * @package Techtronic_Learning
 * @since 1.0.0
 */

/* ==========================================================================
   Main Navigation Bar
   ========================================================================== */

.navbar {
	/* Size */
	height: var(--navbar-height);

	/* Appearance */
	background: var(--surface-1);
	border-bottom: 1px solid var(--gray-700);
	box-shadow: var(--shadow-sm);

	/* Position - Enhanced sticky with browser support */
	position: -webkit-sticky; /* Safari */
	position: sticky;
	top: 0;
	z-index: 1000;

	/* Performance optimization */
	will-change: transform;
	-webkit-backface-visibility: hidden;
	backface-visibility: hidden;

	/* Transition */
	transition: all 0.3s ease;
}

/* Scrolled state (enhanced backdrop blur effect) */
.navbar--scrolled {
	background: rgba(18, 24, 32, 0.95);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Navbar Container
   ========================================================================== */

.navbar__container {
	max-width: var(--container-standard);
	margin: 0 auto;
	padding: 0 var(--container-padding-desktop);
	height: 100%;

	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 32px;
}

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

.navbar__logo {
	height: 40px;
	flex-shrink: 0;
}

.navbar__logo img {
	height: 100%;
	width: auto;
}

.navbar__logo-link {
	display: flex;
	align-items: center;
	text-decoration: none;
	transition: opacity var(--duration-fast) var(--ease-out);
}

.navbar__logo-link:hover {
	opacity: 0.8;
}

.navbar__logo-text {
	font-family: var(--font-display);
	font-size: var(--text-xl);
	font-weight: var(--weight-bold);
	color: var(--gray-50);
	letter-spacing: -0.02em;

	background: linear-gradient(135deg, var(--primary-400) 0%, var(--primary-500) 100%);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

/* ==========================================================================
   Menu (Desktop)
   ========================================================================== */

.navbar__menu {
	display: flex;
	gap: 40px;
	list-style: none;
	margin: 0;
	padding: 0;
	align-items: center;
}

.navbar__menu-item {
	margin: 0;
	padding: 0;
}

.navbar__link {
	/* Typography */
	font-family: var(--font-display);
	font-size: var(--text-base);
	font-weight: var(--weight-medium);
	line-height: 1;
	color: var(--gray-300);
	text-decoration: none;

	/* Position */
	position: relative;
	padding: var(--spacing-2) 0;
	display: inline-flex;
	align-items: center;
	gap: var(--spacing-1);

	/* Transition */
	transition: all var(--duration-base) var(--ease-out);
}

.navbar__link:hover {
	color: var(--primary-400);
	text-decoration: none;  /* Ensure no default underline */
}

.navbar__link:focus,
.navbar__link:active,
.navbar__link:visited {
	text-decoration: none;  /* Remove default underline from all states */
}

/* Smooth left-to-right underline animation */
.navbar__link::after {
	content: '';
	position: absolute;
	bottom: -2px;
	left: 0;
	width: 0;
	height: 3px;  /* Thicker underline */
	background: var(--primary-500);
	transition: width var(--duration-slow) var(--ease-out);
}

.navbar__link:hover::after,
.navbar__link--active::after {
	width: 100%;
}

/* Active link */
.navbar__link--active {
	color: var(--primary-400);
	font-weight: var(--weight-semibold);
}

/* ==========================================================================
   Actions (CTA Buttons)
   ========================================================================== */

.navbar__actions {
	display: flex;
	gap: 12px;
	align-items: center;
	flex-shrink: 0;
}

/* ==========================================================================
   Mobile Menu Toggle
   ========================================================================== */

.navbar__toggle {
	display: none;
	width: 48px;
	height: 48px;
	padding: 0;

	background: transparent;
	border: none;
	color: var(--gray-200);
	cursor: pointer;

	align-items: center;
	justify-content: center;
	border-radius: 6px;

	transition: all 0.2s ease;
}

.navbar__toggle:hover {
	background: var(--surface-2);
	color: var(--primary-500);
}

.navbar__toggle:focus-visible {
	outline: 2px solid var(--primary-500);
	outline-offset: 4px;
}

.navbar__toggle svg {
	width: 24px;
	height: 24px;
}

/* Hamburger icon */
.navbar__toggle-icon {
	display: block;
}

.navbar__toggle-icon--close {
	display: none;
}

/* When menu is open */
.navbar--menu-open .navbar__toggle-icon {
	display: none;
}

.navbar--menu-open .navbar__toggle-icon--close {
	display: block;
}

/* Hide mobile menu by default on desktop */
.navbar__menu--mobile {
	display: none;
}

/* ==========================================================================
   Dropdown Menus (Desktop)
   ========================================================================== */

.navbar__menu-item--has-dropdown {
	position: relative;
}

.navbar__dropdown {
	/* Position */
	position: absolute;
	top: calc(100% + 16px);
	left: 0;
	min-width: 220px;

	/* Appearance */
	background: var(--surface-2);
	border: 1px solid var(--gray-600);
	border-radius: 8px;
	box-shadow: var(--shadow-lg);

	/* List */
	list-style: none;
	margin: 0;
	padding: 8px 0;

	/* State */
	opacity: 0;
	visibility: hidden;
	transform: translateY(-8px);
	transition: all 0.2s ease;
}

.navbar__menu-item--has-dropdown:hover .navbar__dropdown {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

.navbar__dropdown-item {
	margin: 0;
	padding: 0;
}

.navbar__dropdown-link {
	display: block;
	padding: 12px 20px;

	font-family: var(--font-body);
	font-size: 15px;
	color: var(--gray-200);
	text-decoration: none;

	transition: all 0.2s ease;
}

.navbar__dropdown-link:hover {
	background: var(--surface-3);
	color: var(--primary-500);
}

/* ==========================================================================
   Mobile Navigation
   ========================================================================== */

@media (max-width: 991px) {
	/* Show toggle button */
	.navbar__toggle {
		display: flex;
		position: relative;
		z-index: 1001;  /* Above mobile menu */
	}

	/* Make close icon more prominent when menu is open */
	.navbar--menu-open .navbar__toggle {
		background: var(--primary-600);
		color: #ffffff;
	}

	.navbar--menu-open .navbar__toggle:hover {
		background: var(--primary-500);
		transform: scale(1.05);
	}

	.navbar--menu-open .navbar__toggle svg {
		width: 28px;  /* Slightly larger */
		height: 28px;
	}

	/* Hide desktop menu */
	.navbar__menu {
		display: none;
	}

	/* Hide user avatar dropdown on mobile/tablet - account items in hamburger */
	.navbar__user-menu {
		display: none;
	}

	/* Mobile menu (slide-in drawer) - FULL WIDTH */
	.navbar__menu--mobile {
		position: fixed;
		top: var(--navbar-height);
		left: 0;
		right: 0;
		width: 100%;
		height: calc(100vh - var(--navbar-height));

		background: var(--surface-1);
		border-top: 1px solid var(--gray-700);
		box-shadow: var(--shadow-2xl);
		overflow-y: auto;

		display: flex;
		flex-direction: column;
		gap: 0;
		padding: var(--spacing-lg) 0;

		transform: translateY(-100%);
		transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
		z-index: 999;
		opacity: 0;
		visibility: hidden;
	}

	/* Show mobile menu when open */
	.navbar--menu-open .navbar__menu--mobile {
		transform: translateY(0);
		opacity: 1;
		visibility: visible;
	}

	/* Mobile menu items */
	.navbar__menu--mobile .navbar__menu-item {
		margin: 0;
	}

	.navbar__menu--mobile .navbar__link {
		display: block;
		width: 100%;
		padding: 16px 24px;
		font-size: 18px;
		color: var(--gray-100);
		border-bottom: 1px solid var(--gray-700);
	}

	.navbar__menu--mobile .navbar__link::after {
		display: none;
	}

	.navbar__menu--mobile .navbar__link:hover,
	.navbar__menu--mobile .navbar__link--active {
		background: var(--surface-2);
		color: var(--primary-500);
	}

	/* Mobile dropdown */
	.navbar__menu--mobile .navbar__dropdown {
		position: static;
		opacity: 1;
		visibility: visible;
		transform: none;
		box-shadow: none;
		border: none;
		border-radius: 0;
		background: var(--surface-2);
		display: none;
	}

	.navbar__menu--mobile .navbar__menu-item--has-dropdown.is-open .navbar__dropdown {
		display: block;
	}

	.navbar__menu--mobile .navbar__dropdown-link {
		padding-left: 40px;
		font-size: 16px;
	}

	/* Mobile actions */
	.navbar__menu--mobile .navbar__actions {
		flex-direction: column;
		width: 100%;
		padding: 16px 24px;
		border-top: 1px solid var(--gray-700);
	}

	.navbar__menu--mobile .navbar__actions > * {
		width: 100%;
	}

	/* Overlay */
	.navbar__overlay {
		position: fixed;
		top: 80px;
		left: 0;
		right: 0;
		bottom: 0;
		background: rgba(10, 14, 20, 0.8);
		opacity: 0;
		visibility: hidden;
		transition: all 0.3s ease;
		z-index: 998;
	}

	.navbar--menu-open .navbar__overlay {
		opacity: 1;
		visibility: visible;
	}

	/* Prevent body scroll when menu open */
	body.navbar-open {
		overflow: hidden;
	}

	/* Reduce container padding on tablet */
	.navbar__container {
		padding: 0 var(--container-padding-mobile);
	}
}

/* Mobile adjustments */
@media (max-width: 767px) {
	.navbar {
		height: 64px;
	}

	.navbar__container {
		padding: 0 var(--spacing-4);  /* 16px - intentionally smaller for mobile */
	}

	.navbar__logo {
		height: 32px;
	}

	.navbar__menu--mobile {
		top: 64px;
		height: calc(100vh - 64px);
	}

	.navbar__overlay {
		top: 64px;
	}
}

/* ==========================================================================
   Search in Navigation
   ========================================================================== */

.navbar__search {
	position: relative;
	width: 100%;
	max-width: 300px;
}

.navbar__search .form-input {
	height: 40px;
	padding-left: 40px;
	padding-right: 12px;
	background: var(--surface-2);
	border-color: var(--gray-600);
	color: var(--gray-100);
}

.navbar__search .form-input:focus {
	background: var(--surface-light-0);
	color: var(--gray-900);
}

.navbar__search-icon {
	position: absolute;
	left: 12px;
	top: 50%;
	transform: translateY(-50%);
	width: 20px;
	height: 20px;
	color: var(--gray-400);
	pointer-events: none;
}

@media (max-width: 991px) {
	.navbar__search {
		max-width: none;
		padding: 16px 24px;
		border-bottom: 1px solid var(--gray-700);
	}
}

/* ==========================================================================
   User Menu (Avatar Dropdown)
   ========================================================================== */

.navbar__user-menu {
	position: relative;
}

.navbar__user-toggle {
	display: flex;
	align-items: center;
	gap: 8px;
	padding: 4px;

	background: transparent;
	border: none;
	border-radius: 24px;
	cursor: pointer;

	transition: background 0.2s ease;
}

.navbar__user-toggle:hover {
	background: var(--surface-2);
}

/* User Icon (SVG) */
.navbar__user-icon {
	width: 24px;
	height: 24px;
	flex-shrink: 0;
	color: var(--gray-300);
	transition: color 0.2s ease;
}

.navbar__user-toggle:hover .navbar__user-icon {
	color: var(--primary-400);
}

/* Legacy avatar support (if needed) */
.navbar__user-avatar {
	width: 32px;
	height: 32px;
	border-radius: 50%;
	object-fit: cover;
	border: 2px solid var(--gray-600);
}

.navbar__user-name {
	font-family: var(--font-display);
	font-size: 14px;
	font-weight: 500;
	color: var(--gray-200);
	max-width: 120px;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.navbar__user-dropdown {
	position: absolute;
	top: calc(100% + 8px);
	right: 0;
	min-width: 200px;

	background: var(--surface-2);
	border: 1px solid var(--gray-600);
	border-radius: 8px;
	box-shadow: var(--shadow-lg);

	opacity: 0;
	visibility: hidden;
	transform: translateY(-8px);
	transition: all 0.2s ease;

	list-style: none;
	margin: 0;
	padding: 8px 0;
}

.navbar__user-menu.is-open .navbar__user-dropdown {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

/* Dropdown Items */
.navbar__user-dropdown li {
	margin: 0;
	padding: 0;
	list-style: none;
}

.navbar__user-dropdown a {
	display: flex;
	align-items: center;
	padding: var(--spacing-3) var(--spacing-4);

	font-family: var(--font-body);
	font-size: var(--text-sm);
	font-weight: var(--weight-normal);
	color: var(--gray-200);
	text-decoration: none;

	transition: all var(--duration-fast) var(--ease-out);
}

.navbar__user-dropdown a:hover {
	background: var(--surface-3);
	color: var(--primary-400);
	padding-left: var(--spacing-5);
}

.navbar__user-dropdown a:active {
	background: var(--surface-4);
}

/* Cart Menu Item with Badge */
.navbar__user-dropdown li .cart-menu-item,
.navbar__user-dropdown .cart-menu-item {
	display: flex !important;
	align-items: center !important;
	justify-content: space-between !important;
	gap: 8px !important;
}

/* Cart Counter Badge - Maximum specificity */
.navbar__user-dropdown li a .cart-count-badge,
.navbar__user-dropdown .cart-menu-item .cart-count-badge,
.navbar__user-dropdown .cart-count-badge,
.cart-count-badge {
	display: inline-flex !important;
	align-items: center !important;
	justify-content: center !important;
	min-width: 20px !important;
	height: 20px !important;
	padding: 0 6px !important;
	background: #06b6d4 !important;
	color: #0f172a !important;
	font-family: var(--font-display) !important;
	font-size: 11px !important;
	font-weight: 700 !important;
	border-radius: 9999px !important;
	line-height: 1 !important;
	box-shadow: 0 0 0 2px #1e293b !important;
	transition: all 0.2s ease-out !important;
	margin-left: auto !important;
	flex-shrink: 0 !important;
}

.navbar__user-dropdown .cart-menu-item:hover .cart-count-badge,
.navbar__user-dropdown li a:hover .cart-count-badge {
	background: #22d3ee !important;
	box-shadow: 0 0 8px rgba(6, 182, 212, 0.4),
	            0 0 0 2px #334155 !important;
}

/* Mobile Menu Separator */
.navbar__menu-item--separator {
	margin: var(--spacing-4) 0;
}

.navbar__separator {
	display: block;
	height: 1px;
	background: var(--gray-700);
	opacity: 0.5;
}

@media (max-width: 991px) {
	.navbar__user-name {
		display: none;
	}
}

/* ==========================================================================
   Notification Badge on Nav
   ========================================================================== */

.navbar__link--has-badge {
	position: relative;
}

.navbar__link--has-badge .badge-count {
	position: absolute;
	top: -4px;
	right: -12px;
}

/* ==========================================================================
   Sticky Navigation Offset (For Anchor Links)
   ========================================================================== */

:target {
	scroll-margin-top: 96px; /* 80px navbar + 16px spacing */
}

@media (max-width: 767px) {
	:target {
		scroll-margin-top: 80px; /* 64px navbar + 16px spacing */
	}
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
	.navbar {
		position: static;
		border-bottom: 2px solid #000;
		box-shadow: none;
	}

	.navbar__toggle,
	.navbar__actions,
	.navbar__search {
		display: none;
	}

	.navbar__menu {
		gap: 20px;
	}

	.navbar__link::after {
		display: none;
	}
}