/*
 * WIM — Header
 *
 * Sticky header. スクロール時に半透明 + blur に切り替え（main.js が data 属性を付与）。
 * モバイルではハンバーガー → ドロワーシート。
 *
 * @package WIM
 */

.wim-header {
	position: sticky;
	top: 0;
	left: 0;
	right: 0;
	z-index: var(--wim-z-sticky);
	background-color: var(--wim-bg);
	border-bottom: var(--wim-rule);
	transition:
		background-color var(--wim-dur-base) var(--wim-ease),
		backdrop-filter var(--wim-dur-base) var(--wim-ease),
		box-shadow var(--wim-dur-base) var(--wim-ease),
		border-color var(--wim-dur-base) var(--wim-ease);
}

/* スクロール時 */
.wim-header[data-scrolled="true"] {
	background-color: var(--wim-header-bg-scrolled);
	-webkit-backdrop-filter: saturate(180%) blur(12px);
	backdrop-filter: saturate(180%) blur(12px);
	box-shadow: var(--wim-shadow-xs);
}

.wim-header__inner {
	max-width: var(--wim-container-max);
	margin: 0 auto;
	padding: 0 var(--wim-gutter);
	height: var(--wim-header-h);
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--wim-space-5);
}

@media (max-width: 767px) {
	.wim-header__inner {
		height: var(--wim-header-h-mobile);
	}
}

/* ============================================================
 * Brand / Logo
 * ============================================================ */
.wim-header__brand {
	flex: 0 0 auto;
}
.wim-header__brand-link {
	display: inline-flex;
	align-items: center;
	gap: var(--wim-space-3);
	text-decoration: none;
	color: var(--wim-ink);
}
.wim-header__brand-link:hover,
.wim-header__brand-link:focus-visible {
	color: var(--wim-ink);
}

.wim-header__logo {
	display: block;
	width: auto;
	height: 32px;
}

.wim-header__wordmark {
	display: inline-flex;
	flex-direction: column;
	line-height: 1.1;
}
.wim-header__wordmark-name {
	font-family: var(--wim-font-serif);
	font-weight: var(--wim-weight-bold);
	font-size: 22px;
	letter-spacing: 0.04em;
	color: var(--wim-ink);
}
.wim-header__wordmark-en {
	font-family: var(--wim-font-sans);
	font-size: 10px;
	letter-spacing: var(--wim-ls-meta);
	text-transform: uppercase;
	color: var(--wim-muted);
}

/* ============================================================
 * Primary nav (desktop)
 * ============================================================ */
.wim-header__nav {
	flex: 1 1 auto;
	display: flex;
	justify-content: center;
}

.wim-nav-menu {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	align-items: center;
	gap: var(--wim-space-7);
}

.wim-nav-menu li {
	margin: 0;
}
.wim-nav-menu li + li {
	margin-top: 0;
}

.wim-nav-menu a {
	font-family: var(--wim-font-sans);
	font-size: 14px;
	font-weight: var(--wim-weight-medium);
	letter-spacing: 0.04em;
	color: var(--wim-ink);
	text-decoration: none;
	padding: var(--wim-space-2) 0;
	position: relative;
	transition: color var(--wim-dur-base) var(--wim-ease);
}
.wim-nav-menu a::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: -2px;
	height: 1px;
	background: var(--wim-gradient-tech);
	transform: scaleX(0);
	transform-origin: left center;
	transition: transform var(--wim-dur-base) var(--wim-ease);
}
.wim-nav-menu a:hover,
.wim-nav-menu a:focus-visible,
.wim-nav-menu .current-menu-item > a,
.wim-nav-menu .current_page_item > a {
	color: var(--wim-ink);
}
.wim-nav-menu a:hover::after,
.wim-nav-menu a:focus-visible::after,
.wim-nav-menu .current-menu-item > a::after {
	transform: scaleX(1);
}

@media (max-width: 1023px) {
	.wim-header__nav { display: none; }
}

/* ============================================================
 * CTA wrap (desktop)
 * ============================================================ */
.wim-header__cta-wrap {
	flex: 0 0 auto;
	display: flex;
	align-items: center;
	gap: var(--wim-space-3);
}

.wim-header__cta {
	min-height: 40px;
	padding: var(--wim-space-2) var(--wim-space-5);
	font-size: 14px;
}

@media (max-width: 1023px) {
	.wim-header__cta-wrap .wim-btn--secondary { display: none; }
}
@media (max-width: 767px) {
	.wim-header__cta-wrap .wim-header__cta { display: none; }
}

/* ============================================================
 * Hamburger toggle
 * ============================================================ */
.wim-header__toggle {
	display: none;
	flex: 0 0 auto;
	width: 44px;
	height: 44px;
	align-items: center;
	justify-content: center;
	flex-direction: column;
	gap: 5px;
	border: 1px solid var(--wim-line);
	border-radius: var(--wim-radius-sm);
	background-color: transparent;
	cursor: pointer;
	transition: border-color var(--wim-dur-base) var(--wim-ease);
}
.wim-header__toggle:hover,
.wim-header__toggle:focus-visible {
	border-color: var(--wim-ink);
}
.wim-header__toggle-line {
	display: block;
	width: 22px;
	height: 2px;
	background-color: var(--wim-ink);
	transition: transform var(--wim-dur-base) var(--wim-ease),
				opacity var(--wim-dur-base) var(--wim-ease);
}
.wim-header__toggle[aria-expanded="true"] .wim-header__toggle-line:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}
.wim-header__toggle[aria-expanded="true"] .wim-header__toggle-line:nth-child(2) {
	opacity: 0;
}
.wim-header__toggle[aria-expanded="true"] .wim-header__toggle-line:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1023px) {
	.wim-header__toggle { display: inline-flex; }
}

/* ============================================================
 * Mobile sheet
 * ============================================================ */
.wim-header__sheet {
	position: fixed;
	inset: 0;
	background-color: var(--wim-bg);
	z-index: var(--wim-z-overlay);
	overflow-y: auto;
	padding: var(--wim-space-7) var(--wim-gutter) var(--wim-space-9);
	display: flex;
	flex-direction: column;
}
.wim-header__sheet[hidden] {
	display: none;
}

.wim-header__sheet-inner {
	max-width: 600px;
	width: 100%;
	margin: 0 auto;
	display: flex;
	flex-direction: column;
	gap: var(--wim-space-7);
}

.wim-header__sheet-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-bottom: var(--wim-space-5);
	border-bottom: var(--wim-rule);
}
.wim-header__sheet-close {
	width: 44px;
	height: 44px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border: 1px solid var(--wim-line);
	border-radius: var(--wim-radius-sm);
	font-size: 28px;
	color: var(--wim-ink);
	background: transparent;
	cursor: pointer;
}

.wim-header__sheet-nav .wim-nav-menu,
.wim-header__sheet-nav ul {
	flex-direction: column;
	align-items: stretch;
	gap: 0;
	list-style: none;
	padding: 0;
	margin: 0;
}
.wim-header__sheet-nav li {
	border-bottom: var(--wim-rule);
}
.wim-header__sheet-nav a {
	display: block;
	padding: var(--wim-space-5) 0;
	font-family: var(--wim-font-serif);
	font-size: 22px;
	font-weight: var(--wim-weight-bold);
	color: var(--wim-ink);
	text-decoration: none;
}
.wim-header__sheet-nav a::after {
	display: none;
}

.wim-header__sheet-cta {
	width: 100%;
}

.wim-header__sheet-meta {
	font-size: var(--wim-fs-caption);
	color: var(--wim-muted);
	text-align: center;
}

@media (min-width: 1024px) {
	.wim-header__sheet { display: none !important; }
}

/* ============================================================
 * body スクロール無効化（シート開放時）
 * ============================================================ */
body.wim-no-scroll {
	overflow: hidden;
}