/**
 * RD Burger Grid Menu
 * Custom Properties werden aus den Plugin-Einstellungen inline gesetzt (siehe rdbg_inline_css()).
 */

.rdbg {
	--rdbg-cols: 4;
	--rdbg-top: 24px;
	--rdbg-side: 24px;
	--rdbg-bg: rgba(255, 255, 255, 0.8);
	--rdbg-bg-solid: #ffffff;
	--rdbg-btn-bg: #000000;
	--rdbg-btn-color: #ffffff;
	--rdbg-blur: 0px;
	--rdbg-text: #111111;
	--rdbg-muted: #6b6b6b;
	--rdbg-accent: #000000;
	--rdbg-line: #e2e2e2;
	--rdbg-icon: 48px;
	--rdbg-radius: 0px;
	--rdbg-speed: 500ms;
	--rdbg-z: 9999;
	--rdbg-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------------------------------------------------------------- Button */

.rdbg-toggle {
	position: fixed;
	top: var(--rdbg-top);
	z-index: calc(var(--rdbg-z) + 1);
	display: inline-flex;
	align-items: center;
	gap: 12px;
	margin: 0;
	padding: 12px 18px;
	border: 1px solid transparent;
	border-radius: 999px;
	background: var(--rdbg-btn-bg);
	color: var(--rdbg-btn-color);
	font: inherit;
	font-size: 13px;
	font-weight: 500;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	line-height: 1;
	cursor: pointer;
	-webkit-appearance: none;
	appearance: none;
	transition: background var(--rdbg-speed) var(--rdbg-ease), border-color var(--rdbg-speed) var(--rdbg-ease);
}

.rdbg--right .rdbg-toggle {
	right: var(--rdbg-side);
}

.rdbg--left .rdbg-toggle {
	left: var(--rdbg-side);
}

.rdbg-toggle:focus-visible {
	outline: 2px solid var(--rdbg-accent);
	outline-offset: 3px;
}

.rdbg-toggle__label {
	display: block;
	white-space: nowrap;
}

.rdbg-burger {
	position: relative;
	display: block;
	width: 22px;
	height: 14px;
	flex: none;
}

.rdbg-burger i {
	position: absolute;
	left: 0;
	display: block;
	width: 100%;
	height: 1.5px;
	background: currentColor;
	border-radius: 2px;
	transition: transform 350ms var(--rdbg-ease), opacity 200ms linear, width 350ms var(--rdbg-ease);
}

.rdbg-burger i:nth-child(1) { top: 0; }
.rdbg-burger i:nth-child(2) { top: 6.25px; width: 70%; }
.rdbg-burger i:nth-child(3) { top: 12.5px; }

.rdbg-toggle:hover .rdbg-burger i:nth-child(2) {
	width: 100%;
}

/* offener Zustand: Button bleibt wie er ist, die Striche werden zum X */
.rdbg.is-open .rdbg-burger i:nth-child(1) {
	transform: translateY(6.25px) rotate(45deg);
}

.rdbg.is-open .rdbg-burger i:nth-child(2) {
	opacity: 0;
	width: 0;
}

.rdbg.is-open .rdbg-burger i:nth-child(3) {
	transform: translateY(-6.25px) rotate(-45deg);
}

/* ---------------------------------------------------------------- Fläche */

.rdbg-panel {
	position: fixed;
	inset: 0;
	z-index: var(--rdbg-z);
	overflow-y: auto;
	overscroll-behavior: contain;
	color: var(--rdbg-text);
	visibility: hidden;
	transition: visibility 0s linear calc(var(--rdbg-speed) + 200ms);
}

.rdbg-panel[hidden] {
	display: none;
}

.rdbg.is-open .rdbg-panel {
	visibility: visible;
	transition: visibility 0s linear 0s;
}

/* Vorhang: eine Bahn je Spalte, versetzt von oben herunter */

.rdbg-veil {
	position: absolute;
	inset: 0;
	display: flex;
	pointer-events: none;
}

.rdbg-veil span {
	display: block;
	flex: 1;
	background: var(--rdbg-bg);
	-webkit-backdrop-filter: blur(var(--rdbg-blur));
	backdrop-filter: blur(var(--rdbg-blur));
	transform: scaleY(0);
	transform-origin: top center;
	/* Beim Schließen fahren die Bahnen in umgekehrter Reihenfolge zurück. */
	transition: transform var(--rdbg-speed) var(--rdbg-ease) calc((5 - var(--rdbg-v, 1)) * 45ms);
	will-change: transform;
}

.rdbg.is-open .rdbg-veil span {
	transform: scaleY(1);
	transition: transform var(--rdbg-speed) var(--rdbg-ease) calc((var(--rdbg-v, 1) - 1) * 65ms);
}

.rdbg-grid {
	position: relative;
	display: grid;
	grid-template-columns: repeat(var(--rdbg-cols), minmax(0, 1fr));
	align-items: start;
	gap: 0;
	min-height: 100%;
	box-sizing: border-box;
	padding: calc(var(--rdbg-top) + 90px) clamp(24px, 5vw, 80px) clamp(40px, 6vh, 80px);
}

/* ---------------------------------------------------------------- Spalte */

.rdbg-cell {
	box-sizing: border-box;
	padding: 8px clamp(16px, 2.2vw, 40px) 24px;
	border-left: 1px solid var(--rdbg-line);
	border-radius: var(--rdbg-radius);
	opacity: 0;
	transform: translateY(26px);
	filter: blur(6px);
	/* Schließen: schnell weg, ohne Versatz. */
	transition:
		opacity 160ms linear,
		transform 200ms var(--rdbg-ease),
		filter 160ms linear;
}

.rdbg-cell:first-child {
	border-left: 0;
	padding-left: 0;
}

/* Öffnen: jede Spalte startet, sobald ihre Vorhangbahn unten ist. */
.rdbg.is-open .rdbg-cell {
	opacity: 1;
	transform: none;
	filter: none;
	transition:
		opacity 480ms linear calc((var(--rdbg-i, 1) - 1) * 65ms + var(--rdbg-speed) * 0.5),
		transform 760ms var(--rdbg-ease) calc((var(--rdbg-i, 1) - 1) * 65ms + var(--rdbg-speed) * 0.5),
		filter 520ms linear calc((var(--rdbg-i, 1) - 1) * 65ms + var(--rdbg-speed) * 0.5);
}

/* Icon über der Headline – zugleich der Auslöser fürs Aufklappen */

/* Kopfbereich: Icon + Überschrift, gemeinsam klickbar */

.rdbg-cell__head {
	display: block;
	width: 100%;
	margin: 0;
	padding: 0;
	border: 0;
	background: none;
	color: inherit;
	font: inherit;
	text-align: inherit;
	text-decoration: none;
	cursor: pointer;
	-webkit-appearance: none;
	appearance: none;
}

.rdbg-cell__head:focus-visible {
	outline: 2px solid var(--rdbg-accent);
	outline-offset: 6px;
	border-radius: 2px;
}

.rdbg-cell__icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: calc(var(--rdbg-icon) + 24px);
	height: calc(var(--rdbg-icon) + 24px);
	margin: 0 0 22px;
	padding: 0;
	border: 1px solid var(--rdbg-line);
	border-radius: 999px;
	background: transparent;
	color: var(--rdbg-text);
	cursor: pointer;
	-webkit-appearance: none;
	appearance: none;
	transition: border-color 220ms linear, color 220ms linear, background 220ms linear, transform 320ms var(--rdbg-ease);
}

.rdbg-cell__icon--static {
	cursor: default;
}

.rdbg-cell__head:hover .rdbg-cell__icon,
.rdbg-cell.is-expanded .rdbg-cell__icon {
	border-color: var(--rdbg-accent);
	color: var(--rdbg-accent);
}

.rdbg-cell__icon-media {
	display: flex;
	align-items: center;
	justify-content: center;
	width: var(--rdbg-icon);
	height: var(--rdbg-icon);
	pointer-events: none;
	transition: transform 380ms var(--rdbg-ease);
}

/* Beim Drübergehen dreht sich jedes Icon – aufgeklappt bleibt es gedreht stehen. */
.rdbg-cell__head:hover .rdbg-cell__icon-media,
.rdbg-cell__head:focus-visible .rdbg-cell__icon-media,
.rdbg-cell.is-expanded .rdbg-cell__icon-media {
	transform: rotate(135deg);
}

.rdbg-cell__icon-media img,
.rdbg-cell__icon-media svg {
	display: block;
	max-width: 100%;
	max-height: 100%;
	width: auto;
	height: auto;
}

/* Inline-SVGs und der Fallback erben die Farbe der Spalte */
.rdbg-cell__icon-media--svg svg,
.rdbg-cell__icon-media--fallback svg {
	width: 60%;
	height: 60%;
}

.rdbg-cell__icon-media--fallback svg {
	fill: none;
	stroke: currentColor;
}

/*
 * Farben aus der SVG-Datei überschreiben: Präsentationsattribute (fill="#f00")
 * haben Spezifität 0, jede CSS-Regel gewinnt. So werden Icons automatisch schwarz
 * bzw. nehmen die eingestellte Textfarbe an.
 */
.rdbg-cell__icon-media--svg svg,
.rdbg-cell__icon-media--svg svg * {
	fill: currentColor;
}

.rdbg-cell__icon-media--svg svg [fill="none"] {
	fill: none;
}

.rdbg-cell__icon-media--svg svg [stroke]:not([stroke="none"]) {
	stroke: currentColor;
}

/* Headline */

.rdbg-cell__link {
	display: block;
}

.rdbg-cell__num {
	display: block;
	margin-bottom: 12px;
	color: var(--rdbg-muted);
	font-size: 12px;
	font-weight: 500;
	letter-spacing: 0.14em;
	font-variant-numeric: tabular-nums;
}

.rdbg-cell__title {
	display: block;
	font-size: clamp(1.35rem, 1.9vw, 2rem);
	font-weight: 600;
	line-height: 1.1;
	letter-spacing: -0.02em;
	transition: color 200ms linear;
}

.rdbg-cell__head:hover .rdbg-cell__title,
.rdbg-cell__head:focus-visible .rdbg-cell__title,
.rdbg-cell.is-current .rdbg-cell__title {
	color: var(--rdbg-accent);
}

.rdbg-cell__desc {
	display: block;
	margin-top: 10px;
	max-width: 34ch;
	color: var(--rdbg-muted);
	font-size: 0.9rem;
	line-height: 1.5;
}

/* ------------------------------------------------------- Aufklappbereich */

.rdbg-collapse {
	display: grid;
	grid-template-rows: 0fr;
	opacity: 0;
	transition:
		grid-template-rows 420ms var(--rdbg-ease),
		opacity 260ms linear;
}

.rdbg-collapse__inner {
	min-height: 0;
	overflow: hidden;
}

.rdbg-cell.is-expanded .rdbg-collapse {
	grid-template-rows: 1fr;
	opacity: 1;
	transition:
		grid-template-rows 480ms var(--rdbg-ease),
		opacity 320ms linear 120ms;
}

.rdbg-sub {
	margin: 22px 0 0;
	padding: 22px 0 0;
	list-style: none;
	border-top: 1px solid var(--rdbg-line);
}

.rdbg-sub li + li {
	margin-top: 2px;
}

.rdbg-sub a {
	display: block;
	padding: 7px 0;
	color: var(--rdbg-muted);
	font-size: 0.975rem;
	line-height: 1.35;
	text-decoration: none;
	transition: color 180ms linear, transform 220ms var(--rdbg-ease);
}

.rdbg-sub a:hover,
.rdbg-sub a:focus-visible {
	color: var(--rdbg-accent);
	transform: translateX(6px);
}

.rdbg-sub a:focus-visible {
	outline: 2px solid var(--rdbg-accent);
	outline-offset: 4px;
	border-radius: 2px;
}

/* ---------------------------------------------------------------- Zentriert */

.rdbg--align-center .rdbg-cell {
	text-align: center;
}

.rdbg--align-center .rdbg-cell__desc {
	margin-left: auto;
	margin-right: auto;
}

/* Beim Hover nicht seitlich schieben – das bricht die Mittelachse. */
.rdbg--align-center .rdbg-sub a:hover,
.rdbg--align-center .rdbg-sub a:focus-visible {
	transform: none;
}

/* ---------------------------------------------------------------- Umgebung */

html.rdbg-locked {
	overflow: hidden;
}

.rdbg .screen-reader-text {
	position: absolute !important;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0 0 0 0);
	clip-path: inset(50%);
	white-space: nowrap;
	border: 0;
}

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

@media (max-width: 1200px) {
	.rdbg-grid {
		grid-template-columns: repeat(min(var(--rdbg-cols), 3), minmax(0, 1fr));
	}

	.rdbg-cell:nth-child(3n + 1) {
		border-left: 0;
		padding-left: 0;
	}
}

@media (max-width: 900px) {
	.rdbg-grid {
		grid-template-columns: repeat(min(var(--rdbg-cols), 2), minmax(0, 1fr));
		row-gap: 40px;
	}

	.rdbg-cell:nth-child(3n + 1) {
		border-left: 1px solid var(--rdbg-line);
		padding-left: clamp(16px, 2.2vw, 40px);
	}

	.rdbg-cell:nth-child(odd) {
		border-left: 0;
		padding-left: 0;
	}
}

@media (max-width: 640px) {
	.rdbg-grid {
		grid-template-columns: minmax(0, 1fr);
		row-gap: 0;
		padding-top: calc(var(--rdbg-top) + 80px);
	}

	.rdbg-cell {
		border-left: 0 !important;
		padding: 20px 0;
	}

	.rdbg-cell + .rdbg-cell {
		border-top: 1px solid var(--rdbg-line);
	}

	.rdbg-cell__icon {
		margin-bottom: 16px;
	}

	.rdbg-toggle {
		padding: 10px 14px;
	}

	.rdbg-sub {
		margin-top: 16px;
		padding-top: 16px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.rdbg-cell {
		filter: none !important;
	}

	.rdbg-panel,
	.rdbg-veil span,
	.rdbg-cell,
	.rdbg-collapse,
	.rdbg-burger i,
	.rdbg-sub a,
	.rdbg-cell__icon-media {
		transition-duration: 1ms !important;
		transition-delay: 0ms !important;
	}
}