/**
 * Navigation — desktop dropdown nav + off-canvas mobile drawer.
 * Phase 2A §7 (understated nav, drawer not full-screen takeover) and
 * 2A.5 §12 (180ms dropdown, 300ms drawer, minimal translate).
 */

/* ---------- Desktop primary nav ---------- */

.lbm-nav--primary {
	display: none;
}

@media (min-width: 1024px) {
	.lbm-nav--primary {
		display: block;
		/* .lbm-nav--primary is itself a flex item inside
		   .lbm-header__inner--nav (which shares .lbm-header__inner's
		   space-between/flex rules with the brand row) — without an
		   explicit width it just shrink-wraps to its content instead of
		   filling the row, leaving .lbm-nav__list's own space-between
		   nothing to distribute. */
		width: 100%;
	}
}

.lbm-nav--primary .lbm-nav__list {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-6);
	list-style: none;
	width: 100%;
}

.lbm-nav__link {
	display: flex;
	align-items: center;
	gap: var(--space-1);
	font-size: var(--text-nav);
	font-weight: 500;
	color: var(--color-ink);
	padding-block: var(--space-2);
	transition: color var(--duration-hover) var(--ease-standard),
		font-weight var(--duration-hover) var(--ease-standard);
}

.lbm-nav__link:hover {
	color: var(--color-accent);
}

/* Underline sits only on the top-level primary links — an editorial
   accent mark, not a generic hover background. Scoped to direct list
   children so it doesn't also apply inside dropdown submenus, which
   already have their own (background-tint) hover treatment. */
.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item {
	position: relative;
	/* Multi-word items (e.g. "Digital Marketing") were wrapping onto two
	   lines before their neighbors did, since nothing stopped the flex
	   item from shrinking below its label's natural width. */
	flex-shrink: 0;
}

.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item > .lbm-nav__link {
	position: relative;
	white-space: nowrap;
	border-radius: var(--radius-sm);
	transition: color var(--duration-hover) var(--ease-standard),
		font-weight var(--duration-hover) var(--ease-standard),
		background-color var(--duration-hover) var(--ease-standard);
}

.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item > .lbm-nav__link:hover {
	background-color: color-mix(in srgb, var(--color-accent) 8%, transparent);
}

.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item.current-menu-item > .lbm-nav__link,
.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item.current-menu-ancestor > .lbm-nav__link {
	background-color: color-mix(in srgb, var(--color-accent) 6%, transparent);
}

.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item > .lbm-nav__link::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: 0;
	width: 100%;
	height: 2px;
	background-color: var(--color-accent);
	transform: scaleX(0);
	transform-origin: left;
	transition: transform var(--duration-dropdown) var(--ease-standard);
}

.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item > .lbm-nav__link:hover,
.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item.current-menu-item > .lbm-nav__link,
.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item.current-menu-ancestor > .lbm-nav__link {
	font-weight: 600;
}

.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item > .lbm-nav__link:hover::after,
.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item.current-menu-item > .lbm-nav__link::after,
.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item.current-menu-ancestor > .lbm-nav__link::after {
	transform: scaleX(1);
}

.lbm-nav__caret {
	width: 14px;
	height: 14px;
	background-color: currentColor;
	-webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
	mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
	-webkit-mask-size: contain;
	mask-size: contain;
	transition: transform var(--duration-dropdown) var(--ease-standard);
}

.lbm-nav__item--has-submenu:hover .lbm-nav__caret,
.lbm-nav__item--has-submenu:focus-within .lbm-nav__caret,
.lbm-nav__item--has-submenu.is-open > .lbm-nav__link .lbm-nav__caret {
	transform: rotate(180deg);
}

.lbm-nav--primary .lbm-nav__item {
	position: relative;
}

.lbm-nav--primary .lbm-nav__submenu {
	position: absolute;
	top: 100%;
	left: 0;
	min-width: 248px;
	list-style: none;
	background-color: var(--color-paper);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-sm);
	box-shadow: var(--shadow-dropdown);
	padding: var(--space-2);
	opacity: 0;
	visibility: hidden;
	transform: translateY(6px);
	transition: opacity var(--duration-dropdown) var(--ease-standard),
		transform var(--duration-dropdown) var(--ease-standard),
		visibility var(--duration-dropdown);
	z-index: var(--z-dropdown);
}

/* The rightmost item's submenu opens left-anchored like every other one
   by default, extending further right from an already-rightmost item —
   with the row now edge-to-edge (space-between, P2 nav-balance pass) that
   runs the dropdown past the viewport edge and clips it. Flipped to open
   from the item's right edge instead, extending left, so it stays fully
   on-screen regardless of how close to the row's edge the item sits. */
.lbm-nav--primary > .lbm-nav__list > .lbm-nav__item:last-child .lbm-nav__submenu {
	left: auto;
	right: 0;
}

.lbm-nav--primary .lbm-nav__item--has-submenu:hover .lbm-nav__submenu,
.lbm-nav--primary .lbm-nav__item--has-submenu:focus-within .lbm-nav__submenu,
.lbm-nav--primary .lbm-nav__item--has-submenu.is-open .lbm-nav__submenu {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

/* Submenu rows — icon + label "card" layout (Phase 2C nav dropdown
   redesign). Each row is its own small card: a topic icon in a tinted
   badge, label beside it. Deliberately sits one visual step below the
   top-level nav links (smaller, lighter weight, muted color — see
   .lbm-nav__link-label below) so a submenu reads as a nested level, not
   a repeat of the primary nav's own weight. */
.lbm-nav--primary .lbm-nav__submenu .lbm-nav__link,
.lbm-nav__list--mobile .lbm-nav__submenu .lbm-nav__link {
	display: flex;
	align-items: center;
	gap: var(--space-3);
	padding: var(--space-2) var(--space-3);
	border-radius: var(--radius-sm);
	transition: background-color var(--duration-dropdown) var(--ease-standard);
}

.lbm-nav--primary .lbm-nav__submenu li + li .lbm-nav__link {
	margin-top: 2px;
}

.lbm-nav--primary .lbm-nav__submenu .lbm-nav__link:hover,
.lbm-nav__list--mobile .lbm-nav__submenu .lbm-nav__link:hover {
	background-color: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface));
}

/* Icon sits directly in accent color (the mask technique paints from
   currentColor, set via `color` here — not `background-color`, which
   would fight the mask itself) at a size that reads clearly next to the
   now-smaller label text, with room to breathe on either side. */
.lbm-nav__submenu .lbm-icon {
	width: 18px;
	height: 18px;
	color: var(--color-accent);
	flex-shrink: 0;
}

.lbm-nav__submenu .lbm-nav__link-label {
	font-size: 0.875rem;
	font-weight: 400;
	color: var(--color-neutral-700);
}

.lbm-nav__submenu .lbm-nav__link:hover .lbm-nav__link-label {
	color: var(--color-ink);
}

/* ---------- Mobile off-canvas drawer ---------- */

.lbm-mobile-nav[hidden] {
	display: none;
}

.lbm-mobile-nav {
	position: fixed;
	inset: 0;
	z-index: var(--z-drawer);
}

.lbm-mobile-nav__backdrop {
	position: absolute;
	inset: 0;
	background-color: rgba(0, 0, 0, 0.4);
	opacity: 0;
	transition: opacity var(--duration-drawer) var(--ease-fade);
}

.lbm-mobile-nav.is-open .lbm-mobile-nav__backdrop {
	opacity: 1;
}

.lbm-mobile-nav__panel {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	width: min(360px, 85vw);
	background-color: var(--color-paper);
	box-shadow: var(--shadow-modal);
	transform: translateX(100%);
	transition: transform var(--duration-drawer) var(--ease-fade);
	overflow-y: auto;
}

.lbm-mobile-nav.is-open .lbm-mobile-nav__panel {
	transform: translateX(0);
}

.lbm-mobile-nav__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--space-5);
	border-bottom: 1px solid var(--color-border);
}

.lbm-mobile-nav__title {
	font-family: var(--font-serif);
	font-weight: 600;
	font-size: var(--text-h4);
}

.lbm-mobile-nav__close {
	width: 44px;
	height: 44px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: var(--radius-sm);
}

.lbm-mobile-nav__close:hover {
	background-color: var(--color-surface);
}

.lbm-nav__list--mobile {
	list-style: none;
	padding: var(--space-4);
}

.lbm-nav__list--mobile .lbm-nav__link {
	padding: var(--space-3) var(--space-2);
	font-size: 1rem;
	border-bottom: 1px solid var(--color-border);
}

/* Accordion: only the tapped top-level category's children are shown,
   everything else stays collapsed to its label (nav.js manages .is-open,
   one section open at a time). max-height is a generous cap rather than
   a measured value — cheap, no JS height calculation needed, and no real
   subcategory list here comes close to it. */
.lbm-nav__list--mobile .lbm-nav__submenu {
	list-style: none;
	padding-left: var(--space-5);
	max-height: 0;
	overflow: hidden;
	transition: max-height var(--duration-hover) var(--ease-standard);
}

.lbm-nav__list--mobile .lbm-nav__item--has-submenu.is-open > .lbm-nav__submenu {
	max-height: 600px;
}

.lbm-nav__list--secondary {
	border-top: 1px solid var(--color-border);
	margin-top: var(--space-3);
	padding-top: var(--space-3);
}

@media (min-width: 1024px) {
	.lbm-mobile-nav {
		display: none !important;
	}
}