/* ==========================================================================
   Research Lab — layout.css
   Container / section / header / footer
   ========================================================================== */

.container {
	width: 100%;
	max-width: calc(var(--container-width) + var(--gutter) * 2);
	margin-inline: auto;
	padding-inline: var(--gutter);
}

.container--narrow {
	max-width: calc(800px + var(--gutter) * 2);
}

.container--medium {
	max-width: calc(1060px + var(--gutter) * 2);
}

.section {
	position: relative;
	padding-block: var(--space-section);
}

.section--sub {
	background: var(--color-bg-sub);
}

.section--dark {
	background: var(--color-primary);
	color: var(--color-on-dark);
}

.section--dark h2,
.section--dark h3 {
	color: var(--color-on-dark);
}

.section--tight {
	padding-block: calc(var(--space-section) * 0.6);
}

/* Header ------------------------------------------------------------------ */

.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(255, 255, 255, 0);
	border-bottom: 1px solid transparent;
	transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.admin-bar .site-header {
	top: var(--wp-admin--admin-bar--height, 32px);
}

.site-header.is-scrolled,
body:not(.is-front) .site-header {
	background: rgba(255, 255, 255, 0.96);
	border-bottom-color: var(--color-border);
}

.site-header.is-scrolled {
	box-shadow: 0 2px 16px rgba(16, 42, 67, 0.05);
}

@supports (backdrop-filter: blur(8px)) {
	.site-header.is-scrolled,
	body:not(.is-front) .site-header {
		background: rgba(255, 255, 255, 0.92);
		backdrop-filter: saturate(1.2) blur(8px);
	}
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	min-height: var(--header-height);
}

/* Logo */

.site-logo {
	display: inline-flex;
	align-items: center;
	gap: 12px;
	color: var(--color-primary);
	text-decoration: none;
}

.site-logo__mark {
	width: 36px;
	height: 36px;
	flex-shrink: 0;
}

.site-logo__accent {
	fill: var(--color-accent);
}

.site-logo__text {
	display: flex;
	flex-direction: column;
	line-height: 1.3;
}

.site-logo__name {
	font-size: 1rem;
	font-weight: 700;
	letter-spacing: 0.06em;
}

.site-logo__en {
	font-family: var(--font-en);
	font-size: 0.625rem;
	font-weight: 500;
	letter-spacing: 0.12em;
	color: var(--color-muted);
	text-transform: uppercase;
}

.site-logo--inverse {
	color: var(--color-on-dark);
}

.site-logo--inverse .site-logo__en {
	color: var(--color-on-dark-muted);
}

.custom-logo-link {
	display: inline-block;
}

.custom-logo {
	width: auto;
	max-height: 48px;
}

/* Global nav (desktop) */

.global-nav {
	display: flex;
	align-items: center;
	gap: clamp(20px, 2.4vw, 40px);
}

.global-nav__list {
	display: flex;
	align-items: center;
	gap: clamp(18px, 2.2vw, 36px);
	list-style: none;
}

.global-nav__list a {
	position: relative;
	display: flex;
	flex-direction: column;
	padding-block: 8px;
	font-family: var(--font-en);
	font-size: var(--fs-xsmall);
	font-weight: 600;
	letter-spacing: 0.14em;
	color: var(--color-primary);
	text-decoration: none;
}

.global-nav__list a::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: 2px;
	width: 100%;
	height: 1px;
	background: var(--color-accent);
	transform: scaleX(0);
	transform-origin: left;
	transition: transform 0.3s var(--ease);
}

.global-nav__list a:hover::after,
.global-nav__list .current-menu-item > a::after,
.global-nav__list a[aria-current="page"]::after {
	transform: scaleX(1);
}

.menu-item__ja {
	display: none;
}

.global-nav__note {
	display: none;
}

/* Hamburger */

.nav-toggle {
	display: none;
	position: relative;
	z-index: 120;
	width: 48px;
	height: 48px;
	margin-right: -12px;
	padding: 0;
	border: 0;
	background: transparent;
	color: var(--color-primary);
}

.nav-toggle__bars {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 24px;
	height: 10px;
	transform: translate(-50%, -50%);
}

.nav-toggle__bars span {
	position: absolute;
	left: 0;
	width: 100%;
	height: 1.5px;
	background: currentColor;
	transition: transform 0.3s var(--ease), top 0.3s var(--ease);
}

.nav-toggle__bars span:first-child {
	top: 0;
}

.nav-toggle__bars span:last-child {
	top: 8.5px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child {
	top: 4.25px;
	transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child {
	top: 4.25px;
	transform: rotate(-45deg);
}

/* Breadcrumb -------------------------------------------------------------- */

.breadcrumb {
	font-size: var(--fs-xsmall);
	color: var(--color-muted);
}

.breadcrumb__list {
	display: flex;
	flex-wrap: wrap;
	gap: 4px 0;
	list-style: none;
}

.breadcrumb__item:not(:last-child)::after {
	content: "/";
	margin-inline: 10px;
	color: var(--color-border-strong);
}

.breadcrumb a {
	text-decoration: none;
}

.breadcrumb a:hover {
	color: var(--color-primary);
	text-decoration: underline;
}

.breadcrumb [aria-current] {
	color: var(--color-text);
}

/* Footer ------------------------------------------------------------------ */

.site-footer {
	background: var(--color-primary);
	color: var(--color-on-dark);
	font-size: var(--fs-small);
}

.site-footer a {
	color: inherit;
	text-decoration: none;
}

.site-footer a:hover {
	color: var(--color-accent);
}

.site-footer__top {
	display: grid;
	grid-template-columns: 1.3fr 1fr 1.2fr;
	gap: clamp(40px, 5vw, 80px);
	padding-block: clamp(64px, 8vw, 104px) clamp(48px, 6vw, 72px);
}

.site-footer__lead {
	word-break: auto-phrase;
	margin-top: 24px;
	color: var(--color-on-dark-muted);
	line-height: 1.9;
}

.site-footer__list {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 14px 24px;
	list-style: none;
	font-family: var(--font-en);
	font-weight: 500;
	letter-spacing: 0.08em;
}

.site-footer__list a {
	display: inline-flex;
	align-items: center;
	min-height: 32px;
}

.site-footer__cta {
	padding-left: clamp(0px, 3vw, 40px);
	border-left: 1px solid var(--color-border-dark);
}

.site-footer__cta-label {
	font-family: var(--font-en);
	font-size: var(--fs-xsmall);
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--color-accent);
}

.site-footer__cta-text {
	margin: 12px 0 24px;
	color: var(--color-on-dark-muted);
	line-height: 1.9;
}

.site-footer__bottom {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 12px 32px;
	padding-block: 28px 32px;
	border-top: 1px solid var(--color-border-dark);
	color: var(--color-on-dark-muted);
	font-size: var(--fs-xsmall);
}

.site-footer__legal {
	display: flex;
	flex-wrap: wrap;
	gap: 8px 24px;
	list-style: none;
}

.site-footer__company {
	margin-left: auto;
}

.site-footer__copy small {
	font-size: inherit;
	font-family: var(--font-en);
	letter-spacing: 0.06em;
}