/* ==========================================================================
   envitron 2026 - header.css
   Site-Header, Primary-Nav, Sprachschalter, Mobile-Drawer.

   Erwartet Tokens aus main.css (:root). Verhalten:
   - sticky top, deckend weiss (kein durchscheinender Backdrop)
   - hide-on-scroll-down, show-on-scroll-up (via [data-hidden])
   - Mobile: Full-Height-Drawer von rechts mit Backdrop + Scroll-Lock
   ========================================================================== */

/* ------------------------------------------------------------- 1. Shell */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: var(--white);
	border-bottom: 1px solid transparent;
	transition:
		transform var(--transition-med),
		border-color var(--transition-fast),
		box-shadow var(--transition-fast);
	/* NICHT `will-change: transform` hier — das macht den Header zum
	 * containing block fuer alle position:fixed Descendants. Folge:
	 * der Mobile-Drawer (.nav--primary, position: fixed; translateX(100%))
	 * ist dann relativ zum Header positioniert statt zum Viewport und
	 * traegt zum Body-scrollWidth bei -> horizontaler Scroll-Streifen
	 * auf Mobile, durch den der Drawer "rauspeekt".
	 * will-change wird nur waehrend der Hide-on-Scroll-Animation gehintet
	 * (siehe [data-hidden] Block unten). */
}
.site-header[data-sticky].is-stuck {
	border-bottom-color: rgba(42, 49, 66, 0.08);
	box-shadow: 0 1px 0 rgba(42, 49, 66, 0.04), 0 8px 24px -16px rgba(42, 49, 66, 0.18);
}
.site-header[data-hidden="true"] {
	transform: translateY(-100%);
}
@media (prefers-reduced-motion: reduce) {
	.site-header[data-hidden="true"] { transform: none; }
}

.site-header__inner {
	max-width: var(--wide-width);
	margin-inline: auto;
	padding-inline: var(--gutter);
	min-height: var(--header-height);
	display: flex;
	align-items: center;
	gap: var(--space-5);
}

/* Desktop-Reihenfolge: Logo links, dann Hauptmenue, dann Sprachschalter rechts.
 * Auf Mobile wird das via Grid komplett ueberschrieben (siehe Block 7.). */
.site-header__brand { order: 1; }
.site-header__nav   { order: 2; margin-left: auto; }
.site-header__lang  { order: 3; }

/* ------------------------------------------------------------- 2. Brand / Logo */
.site-header__brand { flex: 0 0 auto; display: flex; align-items: center; }
.site-header__brand .custom-logo-link {
	display: inline-flex;
	align-items: center;
	border-radius: var(--radius-sm);
	transition: opacity var(--transition-fast);
}
.site-header__brand .custom-logo-link:hover { opacity: 0.82; }
.site-header__brand .custom-logo {
	max-height: 52px;
	width: auto;
}
.site-header__home-link {
	text-decoration: none;
	color: var(--ink-900);
	display: inline-flex;
	align-items: center;
	font-weight: 700;
	font-size: 1.125rem;
	letter-spacing: -0.005em;
}

/* ------------------------------------------------------------- 3. Nav (Desktop) */
.site-header__nav {
	margin-left: auto;
	display: flex;
	align-items: center;
	gap: clamp(var(--space-4), 2vw, var(--space-6));
}

.nav.nav--primary {
	display: flex;
	align-items: stretch;
	gap: clamp(0.15rem, 0.5vw, 0.5rem);
	list-style: none;
	padding: 0;
	margin: 0;
}
.nav__item {
	margin: 0;
	position: relative;
	display: flex;
	align-items: stretch;
}

.nav__link {
	position: relative;
	display: inline-flex;
	align-items: center;
	gap: var(--space-2);
	padding: 0.75rem var(--space-3);
	color: var(--ink-700);
	text-decoration: none;
	font-weight: 500;
	font-size: 0.95rem;
	letter-spacing: 0.005em;
	white-space: nowrap;
	border-radius: 0;
	background: none;
	transition: color var(--transition-fast);
}
/* Underline-Indicator - wächst aus der Mitte, sitzt unter dem Text */
.nav__link::after {
	content: "";
	position: absolute;
	left: var(--space-3);
	right: var(--space-3);
	bottom: 0.35rem;
	height: 2px;
	background: var(--brand-500);
	transform: scaleX(0);
	transform-origin: 50% 50%;
	transition: transform var(--transition-med);
	border-radius: 2px;
}
.nav__link:hover {
	color: var(--ink-900);
	background: none;
}
.nav__link:hover::after { transform: scaleX(0.6); background: var(--ink-300); }

.nav__link.is-current,
.nav__item.current-menu-item > .nav__link,
.nav__item.current-menu-ancestor > .nav__link {
	color: var(--ink-900);
	font-weight: 600;
	background: none;
}
.nav__link.is-current::after,
.nav__item.current-menu-item > .nav__link::after,
.nav__item.current-menu-ancestor > .nav__link::after {
	transform: scaleX(1);
	background: var(--brand-500);
}

/* ------------------------------------------------------------- 4. Submenu */
.nav__submenu-toggle {
	background: transparent;
	border: 0;
	padding: var(--space-2);
	cursor: pointer;
	color: var(--ink-500);
	margin-left: -0.4rem;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border-radius: var(--radius-sm);
	transition: color var(--transition-fast), background var(--transition-fast);
}
.nav__submenu-toggle:hover {
	color: var(--brand-700);
	background: var(--brand-50);
}
.nav__submenu-toggle:focus-visible {
	outline: 2px solid var(--brand-500);
	outline-offset: 2px;
}

/* Chevron-Icon (Desktop-Standard, signalisiert ein Dropdown).
 * Auf Mobile wird es ueber den Drawer-Block ausgeblendet. */
.nav__chevron {
	display: inline-flex;
	font-size: 1em;
	line-height: 1;
	transition: transform var(--transition-fast);
}
.nav__submenu-toggle[aria-expanded="true"] .nav__chevron {
	transform: rotate(180deg);
}

/* Plus-Icon (Mobile-Standard, Akkordeon-Look). Auf Desktop versteckt.
 * Beim aria-expanded=true blendet sich der vertikale Strich aus -> Minus. */
.nav__plus {
	position: relative;
	display: none; /* Default: nur auf Mobile sichtbar - siehe Drawer-Block */
	width: 14px;
	height: 14px;
}
.nav__plus::before,
.nav__plus::after {
	content: "";
	position: absolute;
	background: currentColor;
	border-radius: 1px;
	transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.nav__plus::before {
	/* horizontal */
	left: 0;
	right: 0;
	top: 50%;
	height: 2px;
	transform: translateY(-50%);
}
.nav__plus::after {
	/* vertikal */
	top: 0;
	bottom: 0;
	left: 50%;
	width: 2px;
	transform: translateX(-50%);
}
.nav__submenu-toggle[aria-expanded="true"] .nav__plus::after {
	transform: translateX(-50%) rotate(90deg);
	opacity: 0;
}

.nav__submenu {
	position: absolute;
	top: calc(100% - 2px);
	left: 0;
	background: var(--white);
	border: 1px solid rgba(42, 49, 66, 0.08);
	border-radius: var(--radius-md);
	box-shadow: var(--shadow-lg);
	padding: var(--space-3);
	min-width: 260px;
	list-style: none;
	margin: 0;
	display: none;
	opacity: 0;
	transform: translateY(-6px);
	transition: opacity var(--transition-fast), transform var(--transition-fast);
}
/* Click-/Tap-getriebenes Auf-Zu: greift ueberall (Desktop wie Mobile),
   sobald JS oder :has() das Toggle als offen markiert. */
.nav__item.is-submenu-open > .nav__submenu,
.nav__submenu-toggle[aria-expanded="true"] + .nav__submenu {
	display: block;
	opacity: 1;
	transform: translateY(0);
}

/* Hover-Auf-Zu nur fuer Pointer-Geraete mit echtem Hover (Maus).
   Auf Touch-Geraeten triggert ein Tap sonst "sticky hover" und das
   Submenu klappt ungewollt auf - User-Bug 19.05.2026. */
@media (hover: hover) and (pointer: fine) {
	.nav__item:hover > .nav__submenu,
	.nav__item:focus-within > .nav__submenu {
		display: block;
		opacity: 1;
		transform: translateY(0);
	}
}
.nav__submenu .nav__item { width: 100%; display: block; }
.nav__submenu .nav__link {
	display: block;
	padding: var(--space-3);
	border-radius: var(--radius-sm);
	white-space: normal;
}
.nav__submenu .nav__link::after { display: none; }
.nav__submenu .nav__link:hover {
	background: var(--brand-50);
	color: var(--brand-700);
}

/* ------------------------------------------------------------- 5. Sprachschalter (custom HTML, kein Polylang-Default) */
.site-header__lang {
	display: inline-flex;
	align-items: center;
	padding: 0.25rem;
	background: var(--ink-50);
	border-radius: 999px;
	gap: 0;
}
.site-header__lang-link {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 36px;
	padding: 0.35rem 0.7rem;
	font-size: 0.75rem;
	font-weight: 600;
	letter-spacing: 0.06em;
	color: var(--ink-500);
	text-decoration: none;
	border-radius: 999px;
	transition: background var(--transition-fast), color var(--transition-fast);
}
.site-header__lang-link:hover { color: var(--ink-900); }
.site-header__lang-link.is-current {
	background: var(--white);
	color: var(--ink-900);
	box-shadow: 0 1px 2px rgba(42, 49, 66, 0.08);
}

/* ------------------------------------------------------------- 6. Burger */
.site-header__burger {
	display: none;
	width: 44px;
	height: 44px;
	border: 0;
	background: transparent;
	cursor: pointer;
	padding: 0;
	position: relative;
	border-radius: var(--radius-sm);
}
.site-header__burger-bar {
	display: block;
	width: 22px;
	height: 2px;
	background: var(--ink-900);
	margin: 5px auto;
	border-radius: 2px;
	transition: transform var(--transition-med), opacity var(--transition-fast);
	transform-origin: center;
}
.site-header__burger[aria-expanded="true"] .site-header__burger-bar:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}
.site-header__burger[aria-expanded="true"] .site-header__burger-bar:nth-child(2) {
	opacity: 0;
}
.site-header__burger[aria-expanded="true"] .site-header__burger-bar:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

/* ------------------------------------------------------------- 6b. Mobile-Drawer-Close-Button (X)
 * Nur sichtbar wenn der Drawer offen ist - sitzt absolut oben rechts im Drawer.
 * Identisches Tap-Target wie der Burger (44x44). Zwei diagonale Striche via
 * Pseudo-Elemente -> X-Icon ohne Font-/SVG-Last. */
.site-header__close {
	display: none;
	position: absolute;
	top: 14px;
	right: 14px;
	width: 44px;
	height: 44px;
	border: 0;
	background: transparent;
	cursor: pointer;
	padding: 0;
	border-radius: var(--radius-sm);
	color: var(--ink-900);
	transition: background var(--transition-fast), color var(--transition-fast);
	z-index: 95; /* ueber dem Drawer (z=90) */
}
.site-header__close:hover {
	background: var(--ink-50);
	color: var(--brand-700);
}
.site-header__close:focus-visible {
	outline: 2px solid var(--brand-500);
	outline-offset: 2px;
}
.site-header__close-icon {
	position: relative;
	display: block;
	width: 18px;
	height: 18px;
	margin: 0 auto;
}
.site-header__close-icon::before,
.site-header__close-icon::after {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: 22px;
	height: 2px;
	background: currentColor;
	border-radius: 2px;
}
.site-header__close-icon::before { transform: translate(-50%, -50%) rotate(45deg); }
.site-header__close-icon::after  { transform: translate(-50%, -50%) rotate(-45deg); }

/* Sichtbar machen sobald der Drawer offen ist (gilt nur in Mobile-Media-Query,
 * siehe Block 7. unten - die display-Anweisung dort uebersteuert das). */

/* ------------------------------------------------------------- 7. Mobile Drawer */
@media (max-width: 1080px) {
	.nav__link { padding-inline: var(--space-2); font-size: 0.9rem; }
	.nav__link::after { left: var(--space-2); right: var(--space-2); }
}

@media (max-width: 960px) {
	/* Mobile-Header-Layout:
	 *   [EN/DE links] [Logo Mitte] [Burger rechts]
	 *
	 * 3-Spalten-Grid mit 1fr/auto/1fr -> das Logo sitzt zwingend mittig,
	 * unabhaengig von der Breite der Aussenslots. */
	.site-header__inner {
		min-height: 68px;
		display: grid;
		grid-template-columns: 1fr auto 1fr;
		gap: var(--space-3);
	}
	.site-header__lang  { grid-column: 1; justify-self: start; order: 0; margin: 0; }
	.site-header__brand { grid-column: 2; justify-self: center; order: 0; margin: 0; }
	.site-header__nav   { grid-column: 3; justify-self: end; order: 0; margin: 0; gap: var(--space-3); }

	/* Logo Mobile leicht kompakter, damit es zwischen Lang und Burger atmet. */
	.site-header__brand .custom-logo { max-height: 40px; }

	.site-header__burger { display: block; }

	/* Drawer
	 * Höhe:
	 *   - Fallback height: 100vh (alte Browser)
	 *   - height: 100svh = Small Viewport Height (mobile Browser-Toolbars korrekt
	 *     beruecksichtigt; iOS Safari Toolbar verkleinert den Viewport mit).
	 *   - overflow-y: auto + overscroll-behavior: contain = saubere Touch-Scroll,
	 *     kein Pull-to-refresh-Bleed.
	 *   - padding-bottom: groessere Atem-Reserve, damit der letzte Eintrag nicht
	 *     hinter der Mobile-Browser-Toolbar landet.
	 */
	.site-header__nav .nav.nav--primary {
		position: fixed;
		top: 0;
		right: 0;
		bottom: 0;
		height: 100vh;
		height: 100svh;
		max-height: 100svh;
		width: min(86vw, 360px);
		background: var(--white);
		flex-direction: column;
		align-items: stretch;
		gap: 0;
		padding: calc(68px + var(--space-5)) var(--space-5) calc(var(--space-7) + env(safe-area-inset-bottom, 0px));
		box-shadow: -20px 0 60px rgba(42, 49, 66, 0.2);
		transform: translateX(100%);
		transition: transform var(--transition-med);
		overflow-y: auto;
		overflow-x: hidden;
		overscroll-behavior: contain;
		-webkit-overflow-scrolling: touch;
		z-index: 90;
	}
	.site-header__nav[data-open="true"] .nav.nav--primary {
		transform: translateX(0);
	}

	/* Close-Button im Drawer: nur sichtbar wenn Drawer offen.
	 * `position: fixed` statt `absolute`, damit er beim Scrollen im Drawer
	 * oben festklebt. Selbe svh-Anker-Logik wie der Drawer selbst. */
	.site-header__nav[data-open="true"] .site-header__close {
		display: inline-flex;
		align-items: center;
		justify-content: center;
		position: fixed;
		top: 14px;
		right: max(14px, env(safe-area-inset-right, 0px));
	}

	/* Backdrop — gleiche svh-Logik wie Drawer fuer saubere Mobile-Coverage. */
	.site-header__nav[data-open="true"]::before {
		content: "";
		position: fixed;
		inset: 0;
		height: 100vh;
		height: 100svh;
		background: rgba(42, 49, 66, 0.55);
		z-index: 80;
		animation: nav-fade-in var(--transition-med) both;
	}
	@keyframes nav-fade-in { from { opacity: 0 } to { opacity: 1 } }

	.nav.nav--primary .nav__item {
		width: 100%;
		display: flex;
		flex-wrap: wrap;
		align-items: center;
		border-bottom: 1px solid var(--ink-100);
	}
	.nav.nav--primary .nav__item:last-child { border-bottom: 0; }
	.nav.nav--primary .nav__link {
		flex: 1 1 auto;
		min-width: 0;
		padding: var(--space-4) var(--space-3);
		font-size: 1.05rem;
		font-weight: 600;
		white-space: normal;
	}
	.nav.nav--primary .nav__link::after { display: none; }
	.nav.nav--primary .nav__link.is-current {
		color: var(--brand-700);
		box-shadow: inset 3px 0 0 var(--brand-500);
	}

	/* Im Mobile-Drawer: Chevron versteckt, Plus sichtbar (Akkordeon). */
	.nav.nav--primary .nav__chevron { display: none; }
	.nav.nav--primary .nav__plus    { display: inline-block; }

	/* Submenu-Plus-Toggle sitzt rechts neben dem Link (Akkordeon-Look). */
	.nav.nav--primary > .nav__item > .nav__submenu-toggle {
		flex: 0 0 auto;
		width: 44px;
		height: 44px;
		margin: 0;
		padding: 0;
		color: var(--ink-700);
	}
	.nav.nav--primary > .nav__item > .nav__submenu-toggle .nav__plus {
		width: 16px;
		height: 16px;
	}

	/* Submenu inline im Drawer (kein Floating) */
	.nav__submenu {
		position: static;
		display: none; /* Default zu: oeffnet sich erst per Toggle */
		opacity: 1;
		transform: none;
		box-shadow: none;
		border: 0;
		border-left: 2px solid var(--brand-200);
		border-radius: 0;
		margin: 0 0 var(--space-3) var(--space-4);
		padding: 0 0 0 var(--space-3);
		min-width: 0;
		background: transparent;
		flex-basis: 100%;
	}
	/* Akkordeon: Submenu nur sichtbar wenn das Parent-<li> offen ist.
	 * Primaer-Selektor ist `.is-submenu-open` (vom JS gesetzt) - das funktioniert
	 * in jedem Browser. Der :has()-Selektor ist Fallback fuer den (seltenen)
	 * Fall dass JS nicht laueft, der Browser es aber unterstuetzt. */
	.nav.nav--primary > .nav__item.is-submenu-open > .nav__submenu,
	.nav.nav--primary > .nav__item:has(.nav__submenu-toggle[aria-expanded="true"]) > .nav__submenu {
		display: block;
	}
	.nav__submenu .nav__link {
		font-size: 0.95rem;
		font-weight: 500;
		padding: var(--space-2) var(--space-3);
	}
}

/* Body-Scroll-Lock wenn Drawer offen */
body.is-nav-open { overflow: hidden; }

/* ------------------------------------------------------------- 8. Resize-Flash-Schutz
 * Wenn der Viewport vom Desktop unter den 960er-Breakpoint geht, springen die
 * Drawer-Styles (position:fixed + transform:translateX(100%)) schlagartig an
 * und die transform-Transition spielt - der Drawer "fliegt" kurz rein, obwohl
 * er gar nicht aufgemacht wurde.
 *
 * Das nav.js setzt waehrend einer aktiven Resize-Sequenz `is-resizing` auf
 * <html>; hier deaktivieren wir alle Drawer-Transitions, solange die Klasse
 * aktiv ist. Nach 200 ms Ruhe ist die Klasse wieder weg und alles laeuft
 * normal weiter. */
html.is-resizing .nav.nav--primary,
html.is-resizing .site-header__nav,
html.is-resizing .site-header,
html.is-resizing .site-header__nav::before {
	transition: none !important;
	animation: none !important;
}