/* Site header (§3, §6) */

.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: var(--paper);
	border-bottom: 1px solid var(--line);
}

.site-header__inner {
	display: flex;
	align-items: center;
	gap: 40px;
	padding-block: 18px;
}

.site-header__logo {
	display: inline-flex;
	flex-shrink: 0;
}
.site-header__logo img {
	height: 32px;
	width: auto;
}

.site-header__nav {
	flex: 1;
}

.site-header__menu {
	display: flex;
	align-items: center;
	gap: 32px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.site-header__item {
	position: relative;
}

.site-header__item > a {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding-block: 8px;
	font-size: 0.9375rem;
	font-weight: 500;
	color: var(--ink);
	border-bottom: 2px solid transparent;
}

.site-header__item.is-current > a {
	color: var(--cyan);
	border-bottom-color: var(--cyan);
}

.site-header__caret {
	width: 7px;
	height: 7px;
	border-right: 1.5px solid currentColor;
	border-bottom: 1.5px solid currentColor;
	transform: rotate(45deg) translateY(-2px);
	transition: transform 150ms ease-out;
}

.site-header__item.has-dropdown:hover > .site-header__caret,
.site-header__item.has-dropdown:focus-within > .site-header__caret {
	transform: rotate(225deg) translateY(2px);
}

/* Dropdown submenu — desktop: hover/focus flyout */
.site-header__submenu {
	list-style: none;
	margin: 0;
	padding: 10px;
	position: absolute;
	top: 100%;
	left: -10px;
	min-width: 260px;
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 12px;
	box-shadow: 0 16px 32px rgba(1, 36, 126, 0.12);
	opacity: 0;
	visibility: hidden;
	transform: translateY(6px);
	transition: opacity 160ms ease-out, transform 160ms ease-out, visibility 160ms;
}

.site-header__item.has-dropdown:hover > .site-header__submenu,
.site-header__item.has-dropdown:focus-within > .site-header__submenu {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

.site-header__submenu .site-header__item > a {
	display: block;
	padding: 10px 12px;
	border-radius: 8px;
	border-bottom: none;
	font-weight: 500;
}
.site-header__submenu .site-header__item > a:hover,
.site-header__submenu .site-header__item > a:focus-visible {
	background: var(--mist);
	color: var(--navy);
}

.site-header__actions {
	display: flex;
	align-items: center;
	gap: 16px;
	flex-shrink: 0;
}

.site-header__toggle {
	display: none;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 40px;
	height: 40px;
	padding: 0;
	background: none;
	border: 1px solid var(--line);
	border-radius: 10px;
}

.site-header__toggle-bar {
	display: block;
	width: 18px;
	height: 2px;
	margin-inline: auto;
	background: var(--ink);
	transition: transform 200ms ease-out, opacity 200ms ease-out;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
	transform: translateY(7px) rotate(45deg);
}
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
	opacity: 0;
}
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(4) {
	transform: translateY(-7px) rotate(-45deg);
}

/* Below ~1024px: collapse nav into a slide-out panel, keep CTA visible (§6) */
@media (max-width: 1024px) {
	.site-header__toggle {
		display: flex;
	}

	/* The nav is a fixed panel here, so nothing else pushes the actions to the
	   edge: right-align the CTA and hamburger explicitly. */
	.site-header__inner {
		gap: 16px;
	}

	.site-header__actions {
		margin-left: auto;
		gap: 12px;
	}

	.site-header__nav {
		position: fixed;
		inset: 0 0 0 30%;
		top: 69px;
		background: var(--paper);
		padding: 24px;
		overflow-y: auto;
		transform: translateX(100%);
		transition: transform 220ms ease-out;
		box-shadow: -16px 0 32px rgba(1, 36, 126, 0.12);
	}

	.site-header.is-nav-open .site-header__nav {
		transform: translateX(0);
	}

	.site-header__menu {
		flex-direction: column;
		align-items: stretch;
		gap: 4px;
	}

	/* Top-level links fill the whole panel: label on the left, caret pinned to
	   the right edge, divider across the full width. */
	.site-header__item > a {
		display: flex;
		width: 100%;
		justify-content: space-between;
		padding: 14px 4px;
		border-bottom: 1px solid var(--line);
	}

	.site-header__submenu {
		position: static;
		opacity: 1;
		visibility: visible;
		transform: none;
		box-shadow: none;
		border: none;
		display: none;
		padding-left: 12px;
	}

	.site-header__item.is-open > .site-header__submenu {
		display: block;
	}

	.site-header__item.is-open > a .site-header__caret {
		transform: rotate(225deg) translateY(2px);
	}
}

@media (max-width: 480px) {
	.site-header__nav {
		inset: 0;
		top: 69px;
	}
}

/* Phones: a lighter header so logo, CTA and hamburger sit on one line. */
@media (max-width: 640px) {
	.site-header__inner {
		padding-block: 14px;
	}

	.site-header__logo img {
		height: 28px;
	}

	.site-header__actions {
		gap: 10px;
	}

	.site-header__actions .btn {
		padding: 0.6em 1.1em;
		font-size: 0.8125rem;
	}

	.site-header__toggle {
		width: 38px;
		height: 38px;
	}
}