/* ==========================================================================
   MEGA MENU
   Sublinhado animado (elemento de assinatura "fio vivo"): uma linha fina
   que percorre o item de menu ao passar o mouse, como corrente elétrica.
   ========================================================================== */

.primary-nav__list {
	display: flex;
	align-items: center;
	gap: var(--space-md);
}

.primary-nav__list > li {
	position: relative;
}

.primary-nav__list > li > a {
	position: relative;
	display: inline-block;
	font-family: var(--font-display);
	font-weight: 600;
	font-size: var(--fs-sm);
	letter-spacing: 0.01em;
	padding-block: var(--space-sm);
}

.primary-nav__list > li > a::after {
	content: '';
	position: absolute;
	left: 0;
	bottom: calc(var(--space-sm) - 6px);
	width: 100%;
	height: 1px;
	background: var(--ink);
	transform: scaleX(0);
	transform-origin: left;
	transition: transform var(--dur-base) var(--ease);
}

.primary-nav__list > li:hover > a::after,
.primary-nav__list > li > a:focus-visible::after {
	transform: scaleX(1);
}

/* Painel do mega menu (sub-menu de 1º nível) */
.primary-nav__list .sub-menu {
	position: absolute;
	top: 100%;
	left: 50%;
	transform: translate(-50%, 8px);
	min-width: 240px;
	background: var(--paper);
	border: 1px solid var(--line-color);
	padding: var(--space-sm);
	display: grid;
	gap: 2px;
	opacity: 0;
	visibility: hidden;
	transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
	z-index: var(--z-header);
}

.primary-nav__list > li:hover > .sub-menu,
.primary-nav__list > li:focus-within > .sub-menu {
	opacity: 1;
	visibility: visible;
	transform: translate(-50%, 0);
}

.primary-nav__list .sub-menu a {
	display: block;
	padding: 0.5em 0.4em;
	font-size: var(--fs-sm);
	color: var(--graphite);
	border-bottom: 1px solid transparent;
	transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.primary-nav__list .sub-menu a:hover {
	color: var(--ink);
	border-color: var(--line-color);
}

/* Sub-submenu (3º nível) — exibido como lista recuada dentro do painel */
.primary-nav__list .sub-menu .sub-menu {
	position: static;
	transform: none;
	opacity: 1;
	visibility: visible;
	border: 0;
	padding: 0 0 0 var(--space-xs);
	background: transparent;
}