.site-header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	z-index: var(--z-header);
	background: transparent;
	padding: 33px 32px 32px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	pointer-events: none;
}

.site-header__inner {
	width: 100%;
	display: flex;
	align-items: center;
	justify-content: space-between;
	pointer-events: auto;
}

.site-header__logo {
	width: 240px;
	height: 27px;
	display: block;
}

.site-header__logo img,
.site-header__logo svg {
	width: 100%;
	height: 100%;
	display: block;
}

.site-header__nav {
	display: flex;
	align-items: center;
	gap: 46px;
}

.site-header__nav-item {
	font-family: var(--ff-en);
	font-weight: var(--fw-medium);
	font-size: var(--fs-nav);
	letter-spacing: var(--ls-nav);
	line-height: var(--lh-tight);
	color: var(--c-black);
	display: inline-flex;
	align-items: center;
	gap: 10px;
}

.site-header__nav-item .icon {
	width: 23px;
	height: 14px;
	flex-shrink: 0;
	background-image: url("../images/icon-arrow.png");
	background-repeat: no-repeat;
	background-position: center;
	background-size: contain;
}

@media (max-width: 1023px) {
	.site-header {
		padding: 20px 16px;
	}

	.site-header__logo {
		width: 198px;
		height: auto;
	}

	.site-header__nav {
		display: none;
	}

	.site-header__menu-toggle {
		display: inline-flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		gap: 7px;
		width: 32px;
		height: 32px;
		padding: 0;
		border: 0;
		background: transparent;
		cursor: pointer;
	}
}

@media (min-width: 1024px) {
	.site-header__menu-toggle {
		display: none;
	}
}

/* ハンバーガーアイコン（2本線 ⇄ ×） */
.site-header__menu-toggle-line {
	display: block;
	width: 24px;
	height: 1px;
	background: currentColor;
	color: var(--c-black);
	transition: transform 0.3s ease;
}

.is-menu-open .site-header__menu-toggle-line:nth-child(1) {
	transform: translateY(4px) rotate(45deg);
}

.is-menu-open .site-header__menu-toggle-line:nth-child(2) {
	transform: translateY(-4px) rotate(-45deg);
}

/* メニュー展開中はヘッダー（ロゴ・トグル）をオーバーレイより手前に */
.is-menu-open .site-header {
	z-index: calc(var(--z-overlay) + 1);
}

/* SPフルスクリーンメニュー */
.sp-menu {
	position: fixed;
	inset: 0;
	z-index: var(--z-overlay);
	display: flex;
	align-items: center;
	background: var(--c-white);
	padding: 96px 32px 48px;
	visibility: hidden;
	opacity: 0;
	transition: opacity 0.35s ease, visibility 0s linear 0.35s;
}

.is-menu-open .sp-menu {
	visibility: visible;
	opacity: 1;
	transition: opacity 0.35s ease;
}

.sp-menu__nav {
	display: flex;
	flex-direction: column;
	gap: 36px;
	width: 100%;
}

.sp-menu__nav-item {
	font-family: var(--ff-en);
	font-weight: var(--fw-medium);
	font-size: 24px;
	letter-spacing: var(--ls-hero);
	line-height: var(--lh-tight);
	color: var(--c-black);
	display: inline-flex;
	align-items: center;
	gap: 14px;
	opacity: 0;
	transform: translateY(12px);
	transition: opacity 0.4s ease, transform 0.4s ease;
}

.is-menu-open .sp-menu__nav-item {
	opacity: 1;
	transform: translateY(0);
}

.is-menu-open .sp-menu__nav-item:nth-child(1) { transition-delay: 0.1s; }
.is-menu-open .sp-menu__nav-item:nth-child(2) { transition-delay: 0.18s; }
.is-menu-open .sp-menu__nav-item:nth-child(3) { transition-delay: 0.26s; }

.sp-menu__nav-item .icon {
	width: 23px;
	height: 14px;
	flex-shrink: 0;
	background-image: url("../images/icon-arrow.png");
	background-repeat: no-repeat;
	background-position: center;
	background-size: contain;
}

/* メニュー展開中は背面のスクロールを止める */
.is-menu-open,
.is-menu-open body {
	overflow: hidden;
}

@media (min-width: 1024px) {
	.sp-menu {
		display: none;
	}
}

@media (prefers-reduced-motion: reduce) {
	.site-header__menu-toggle-line,
	.sp-menu,
	.sp-menu__nav-item {
		transition: none;
	}
}