/*
 * Chr theme — header bar and full-screen side menu.
 *
 * The bar is fixed. Over the home hero it is transparent; once the hero
 * scrolls out of view (or on any page without a hero) it becomes solid.
 * The side menu slides in from the left above a dark overlay.
 */

/* ---------- Top bar ---------- */

.site-header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	background: transparent;
	color: var(--color-white);
	transition: background-color var(--transition-speed) var(--transition-ease),
	            transform var(--transition-speed) var(--transition-ease);
}

body:not(.has-hero) .site-header,
.site-header.scrolled {
	background: var(--color-dark);
	box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}

.site-header.is-hidden {
	transform: translateY(-100%);
}

.header-inner {
	height: var(--header-height);
	max-width: 1400px;
	margin: 0 auto;
	padding: 0 24px;
	display: grid;
	grid-template-columns: 1fr auto 1fr;
	align-items: center;
	gap: 16px;
}

.header-inner .menu-toggle {
	justify-self: start;
}

.site-branding {
	justify-self: center;
	text-align: center;
}

.site-branding .site-title,
.side-menu-brand .site-title {
	font-size: 1.3rem;
	font-weight: 900;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--color-white);
}

.site-branding .custom-logo {
	max-height: 56px;
	max-width: auto;
	width: auto;
}
/* Logos keep their own colors on a white tile, so they stay readable on the dark header, menu and footer. */
.custom-logo {
    background: var(--color-white);
}

.header-cta {
	justify-self: end;
	padding: 12px 20px;
}

.site-header.scrolled .header-cta,
body:not(.has-hero) .site-header .header-cta {
	border-color: var(--color-orange);
	color: var(--color-orange);
}

.site-header.scrolled .header-cta::before,
body:not(.has-hero) .site-header .header-cta::before {
	background: var(--color-orange);
}

.site-header.scrolled .header-cta:hover,
body:not(.has-hero) .site-header .header-cta:hover {
	color: var(--color-white);
}

/* ---------- Burger / close icon ---------- */

.menu-toggle {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	padding: 0;
	border: 0;
	background: transparent;
	color: inherit;
	cursor: pointer;
}

.menu-toggle:focus-visible {
	outline: 2px solid var(--color-tan);
	outline-offset: 2px;
}

.menu-toggle-bars {
	position: relative;
	display: block;
	width: 26px;
	height: 16px;
}

.menu-toggle-bars span {
	position: absolute;
	left: 0;
	width: 100%;
	height: 2px;
	background: currentColor;
	transition: transform 0.4s var(--transition-ease), top 0.4s var(--transition-ease), opacity 0.3s var(--transition-ease);
}

.menu-toggle-bars span:nth-child(1) { top: 0; }
.menu-toggle-bars span:nth-child(2) { top: 7px; }
.menu-toggle-bars span:nth-child(3) { top: 14px; }

/* Burger morphs into an X while the menu is open. */
.menu-toggle[aria-expanded="true"] .menu-toggle-bars span:nth-child(1),
.side-menu.is-open .menu-toggle-bars span:nth-child(1) {
	top: 7px;
	transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bars span:nth-child(2),
.side-menu.is-open .menu-toggle-bars span:nth-child(2) {
	opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bars span:nth-child(3),
.side-menu.is-open .menu-toggle-bars span:nth-child(3) {
	top: 7px;
	transform: rotate(-45deg);
}

/* ---------- Overlay ---------- */

.menu-overlay {
	position: fixed;
	inset: 0;
	z-index: 1100;
	background: var(--overlay-darker);
	opacity: 0;
	visibility: hidden;
	transition: opacity 0.5s var(--transition-ease), visibility 0.5s var(--transition-ease);
}

.menu-overlay.is-visible {
	opacity: 1;
	visibility: visible;
}

/* ---------- Side menu ---------- */

.side-menu {
	position: fixed;
	top: 0;
	left: 0;
	z-index: 1200;
	width: 100%;
	max-width: 420px;
	height: 100vh;
	height: 100dvh;
	overflow-y: auto;
	background: var(--color-dark);
	color: var(--color-light);
	transform: translateX(-100%);
	visibility: hidden;
	transition: transform 0.5s var(--transition-ease), visibility 0.5s var(--transition-ease);
}

.side-menu.is-open {
	transform: translateX(0);
	visibility: visible;
}

.side-menu-inner {
	min-height: 100%;
	display: flex;
	flex-direction: column;
	padding: 0 32px 32px;
}

.side-menu-top {
	height: var(--header-height);
	display: flex;
	align-items: center;
	margin: 0 -10px;
}

.side-menu-top .menu-toggle {
	color: var(--color-white);
}

.side-menu-brand {
	text-align: center;
	padding: 16px 0 32px;
}

.side-menu-brand .custom-logo {
	max-height: 56px;
	width: auto;
	margin: 0 auto;
}

.side-nav {
	border-top: 1px solid rgba(242, 242, 242, 0.15);
	border-bottom: 1px solid rgba(242, 242, 242, 0.15);
	padding: 24px 0;
}

.side-nav-links {
	list-style: none;
	margin: 0;
	padding: 0;
	text-align: center;
}

.side-nav-links > li {
	margin: 0 0 6px;
}

.side-nav-links a {
	display: inline-block;
	padding: 8px 0;
	font-size: 1.3rem;
	font-weight: 300;
	letter-spacing: 0.04em;
	color: var(--color-light);
}

.side-nav-links a:hover,
.side-nav-links .current-menu-item > a {
	color: var(--color-tan);
}

/* Staggered entrance: each top-level item fades in 50ms after the previous. */
.side-menu .side-nav-links > li {
	opacity: 0;
	transform: translateX(-20px);
	transition: opacity 0.4s var(--transition-ease), transform 0.4s var(--transition-ease);
}

.side-menu.is-open .side-nav-links > li {
	opacity: 1;
	transform: none;
}

.side-menu.is-open .side-nav-links > li:nth-child(1) { transition-delay: 0.10s; }
.side-menu.is-open .side-nav-links > li:nth-child(2) { transition-delay: 0.15s; }
.side-menu.is-open .side-nav-links > li:nth-child(3) { transition-delay: 0.20s; }
.side-menu.is-open .side-nav-links > li:nth-child(4) { transition-delay: 0.25s; }
.side-menu.is-open .side-nav-links > li:nth-child(5) { transition-delay: 0.30s; }
.side-menu.is-open .side-nav-links > li:nth-child(6) { transition-delay: 0.35s; }

/* Accordion sub-menus. Without JavaScript they stay expanded. */
.side-nav-links .submenu-toggle {
	display: inline-block;
	margin-left: 4px;
	padding: 4px 8px;
	border: 0;
	background: transparent;
	color: var(--color-tan);
	font-size: 1rem;
	cursor: pointer;
	transition: transform 0.3s var(--transition-ease);
}

.side-nav-links .submenu-toggle::before {
	content: "\25BE";
}

.side-nav-links li.is-open > .submenu-toggle {
	transform: rotate(180deg);
}

html.js .side-nav-links .sub-menu {
	display: none;
}

html.js .side-nav-links li.is-open > .sub-menu {
	display: block;
}

.side-nav-links .sub-menu {
	list-style: none;
	margin: 8px 0 0;
	padding: 0;
}

.side-nav-links .sub-menu a {
	padding: 6px 0;
	font-size: 1rem;
	color: var(--color-tan);
}

.side-menu-footer {
	margin-top: auto;
	padding-top: 32px;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 24px;
}

.side-menu-cta {
	width: 100%;
	text-align: center;
	color: var(--color-light);
	border-color: var(--color-orange);
}

body.menu-open {
	overflow: hidden;
}

/* ---------- Responsive ---------- */

@media (max-width: 480px) {
	.header-inner {
		padding: 0 16px;
	}

	.header-cta {
		padding: 10px 12px;
		font-size: 11px;
		letter-spacing: 0.12em;
	}

	.side-menu-inner {
		padding: 0 24px 24px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.site-header,
	.menu-overlay,
	.side-menu,
	.menu-toggle-bars span,
	.side-menu .side-nav-links > li,
	.side-nav-links .submenu-toggle {
		transition: none;
	}

	.side-menu .side-nav-links > li {
		transform: none;
	}
}