.trb-kl-wrap,
.trb-kl-wrap * {
	box-sizing: border-box;
}

:root {
	--trb-tv-bg: #e8eaed;
	--trb-tv-text: #1e1e1e;
	--trb-tv-text-muted: #6b6b6b;
	--trb-tv-card-bg: #f8f8f9;
	--trb-tv-border: #cfd3d8;

	--trb-tv-chrome-bg: rgba( 22, 24, 28, 0.88 );
	--trb-tv-chrome-text: #e8e8e8;
	--trb-tv-chrome-text-muted: #c4c4c4;
	--trb-tv-chrome-hover: rgba( 255, 255, 255, 0.08 );
	--trb-tv-chrome-active-bg: rgba( 255, 255, 255, 0.14 );
}

[data-trb-theme="dark"] {
	--trb-tv-bg: #000000;
	--trb-tv-text: #eaeaea;
	--trb-tv-text-muted: #9a9a9a;
	--trb-tv-card-bg: #1c1c1e;
	--trb-tv-border: #2c2f36;

	--trb-tv-chrome-bg: rgba( 0, 0, 0, 0.88 );
	--trb-tv-chrome-text: #eaeaea;
	--trb-tv-chrome-text-muted: #b0b0b0;
	--trb-tv-chrome-hover: rgba( 255, 255, 255, 0.08 );
	--trb-tv-chrome-active-bg: rgba( 255, 255, 255, 0.14 );
}

body.trb-kursliste {
	margin: 0;
	min-height: 100vh;
	background: #000;
	color: var( --trb-tv-text );
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	font-size: 16px;
	line-height: 1.55;
	font-weight: 500;
	transition: background 0.15s ease, color 0.15s ease;
}

/* Vollflächiges, fixiertes Hintergrundbild plus separat steuerbares Overlay. */
.trb-kl-background,
.trb-kl-background-overlay {
	position: fixed;
	inset: 0;
	pointer-events: none;
}

.trb-kl-background {
	z-index: 0;
	background-position: center;
	background-repeat: no-repeat;
	background-size: cover;
	opacity: 0;
	transition: opacity 0.38s ease;
}

.trb-kl-background-overlay {
	z-index: 1;
	opacity: 0;
	transition: opacity 0.38s ease;
}

body.trb-kursliste.trb-bg-ready .trb-kl-background {
	opacity: 1;
}

body.trb-kursliste.trb-bg-ready .trb-kl-background-overlay {
	opacity: var( --trb-kl-overlay-opacity, 0.6 );
}

.trb-kl-overlay-dark .trb-kl-background-overlay {
	background: #000;
}

.trb-kl-overlay-light .trb-kl-background-overlay {
	background: #fff;
}

.trb-kl-wrap {
	position: relative;
	z-index: 2;
	max-width: 1240px;
	margin: 0 auto;
	padding: 54px 32px 90px;
}

/* Mit Hintergrund bestimmt das gewählte Overlay die ideale Schriftfarbe. */
.trb-kl-has-background .trb-kl-wrap {
	color: var( --trb-kl-overview-text );
}

.trb-kl-intro {
	width: 100%;
	max-width: none;
	margin: 0 0 36px;
}

/* Begrüssung und Akkordeon bilden bewusst dieselbe Text-/Inhaltsbreite. */
.trb-kl-welcome,
.trb-kl-instructions {
	width: 100%;
	max-width: none;
}



.trb-kl-heading-row {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	gap: 30px;
}

.trb-kl-heading-copy {
	min-width: 0;
}

.trb-kl-eyebrow {
	display: block;
	margin-bottom: 7px;
	color: inherit;
	opacity: 0.82;
	text-transform: uppercase;
	letter-spacing: 0.07em;
	font-size: 11px;
	font-weight: 800;
}

.trb-kl-page-title {
	margin: 0;
	font-size: clamp( 34px, 5vw, 58px );
	line-height: 1.06;
	font-weight: 800;
	letter-spacing: -0.025em;
	color: inherit;
	text-wrap: balance;
}

.trb-kl-welcome {
	margin-top: 18px;
	font-size: 18px;
	line-height: 1.65;
	font-weight: 500;
	color: var( --trb-kl-overview-muted, var( --trb-tv-text-muted ) );
}

.trb-kl-no-background .trb-kl-welcome {
	color: var( --trb-tv-text-muted );
}


.trb-kl-welcome > *,
.trb-kl-instructions-content > * {
	max-width: none !important;
}

.trb-kl-welcome > :first-child,
.trb-kl-instructions-content > :first-child {
	margin-top: 0;
}

.trb-kl-welcome > :last-child,
.trb-kl-instructions-content > :last-child {
	margin-bottom: 0;
}

/* Semantisches, tastaturfreundliches Akkordeon via <details>. */
.trb-kl-instructions {
	margin-top: 24px;
	border: 1px solid var( --trb-kl-category-border, var( --trb-tv-border ) );
	border-radius: 12px;
	background: var( --trb-kl-accordion-bg, var( --trb-tv-card-bg ) );
	backdrop-filter: blur( 10px );
	-webkit-backdrop-filter: blur( 10px );
	overflow: hidden;
}

.trb-kl-instructions summary {
	list-style: none;
	cursor: pointer;
	padding: 15px 18px;
	font-weight: 700;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 14px;
}

.trb-kl-instructions summary::-webkit-details-marker {
	display: none;
}

.trb-kl-instructions summary::after {
	content: "+";
	font-size: 24px;
	font-weight: 500;
	line-height: 1;
	transition: transform 0.15s ease;
}

.trb-kl-instructions[open] summary::after {
	transform: rotate( 45deg );
}

.trb-kl-instructions summary:hover {
	background: rgba( 127, 127, 127, 0.08 );
}

.trb-kl-instructions-content {
	padding: 2px 18px 18px;
	color: inherit;
}

.trb-kl-categories {
	width: 100%;
	display: grid;
	gap: 24px;
}

/* Jede Kategorie ist eine eigene halbtransparente Box. */
.trb-kl-kategorie {
	margin: 0;
	padding: 24px;
	border-radius: 16px;
	background: var( --trb-kl-category-bg, var( --trb-tv-card-bg ) );
	border: 1px solid var( --trb-kl-category-border, var( --trb-tv-border ) );
	backdrop-filter: blur( 12px );
	-webkit-backdrop-filter: blur( 12px );
}

.trb-kl-no-background .trb-kl-kategorie {
	background: var( --trb-tv-card-bg );
}

.trb-kl-kategorie-header {
	display: flex;
	align-items: center;
	gap: 16px;
	margin-bottom: 18px;
}

.trb-kl-kategorie-logo {
	width: 48px;
	height: 48px;
	object-fit: contain;
	border-radius: 8px;
	background: rgba( 255, 255, 255, 0.94 );
	border: 1px solid rgba( 0, 0, 0, 0.08 );
	padding: 6px;
}

.trb-kl-kategorie-titel {
	font-size: 22px;
	font-weight: 700;
	margin: 0;
	color: inherit;
}

.trb-kl-kurse-grid {
	display: grid;
	grid-template-columns: repeat( auto-fill, minmax( 240px, 1fr ) );
	gap: 12px;
}

.trb-kl-kurs-karte {
	display: block;
	background: var( --trb-kl-course-bg, var( --trb-tv-card-bg ) );
	border: 1px solid var( --trb-kl-category-border, var( --trb-tv-border ) );
	border-radius: 10px;
	padding: 18px 20px;
	text-decoration: none;
	color: inherit;
	font-weight: 700;
	transition: background 0.15s ease;
}

/* Bewusst kein Schatten und keine Bewegung: nur eine leichte Farbänderung. */
.trb-kl-kurs-karte:hover,
.trb-kl-kurs-karte:focus-visible {
	background: var( --trb-kl-course-hover-bg, rgba( 127, 127, 127, 0.10 ) );
}

.trb-kl-kurs-karte:focus-visible {
	outline: 2px solid currentColor;
	outline-offset: 2px;
}

.trb-kl-leer {
	color: var( --trb-kl-overview-muted, var( --trb-tv-text-muted ) );
	padding: 60px 0;
	text-align: center;
}

@media ( max-width: 720px ) {
	.trb-kl-heading-row {
		flex-direction: column;
		align-items: stretch;
		gap: 18px;
	}

	.trb-kl-top-actions {
		justify-content: flex-start;
	}

	.trb-kl-wrap {
		padding: 36px 18px 56px;
	}

.trb-kl-page-title {
		font-size: clamp( 32px, 11vw, 46px );
	}

	.trb-kl-welcome {
		font-size: 16px;
	}

	.trb-kl-kategorie {
		padding: 18px;
		border-radius: 13px;
	}

	.trb-kl-kurse-grid {
		grid-template-columns: 1fr;
	}

	.trb-tv-theme-label {
		display: none !important;
	}
}

/* Sauberer Fallback, wenn kein Hintergrundbild gewählt ist. */
.trb-kl-no-background .trb-kl-instructions {
	background: var( --trb-tv-card-bg );
	border-color: var( --trb-tv-border );
}

.trb-kl-no-background .trb-kl-kurs-karte {
	background: var( --trb-tv-card-bg );
	border-color: var( --trb-tv-border );
	color: var( --trb-tv-text );
}

.trb-kl-no-background .trb-kl-kurs-karte:hover,
.trb-kl-no-background .trb-kl-kurs-karte:focus-visible {
	background: rgba( 127, 127, 127, 0.08 );
}

/* Direkter Einstieg in die Verwaltung – gleiche Glasoptik wie die Seite. */
.trb-kl-top-actions {
	display: flex;
	justify-content: flex-end;
	gap: 8px;
	flex-wrap: wrap;
	margin: 0;
}

.trb-kl-action-button {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	min-height: 36px;
	padding: 7px 12px;
	border: 1px solid var( --trb-kl-category-border, var( --trb-tv-border ) );
	border-radius: 7px;
	background: var( --trb-kl-course-bg, var( --trb-tv-card-bg ) );
	color: inherit;
	font-size: 14px;
	font-weight: 700;
	text-decoration: none;
	backdrop-filter: blur( 8px );
	-webkit-backdrop-filter: blur( 8px );
	transition: background 0.15s ease;
}

.trb-kl-action-button:hover,
.trb-kl-action-button:focus-visible {
	background: var( --trb-kl-course-hover-bg, rgba( 127, 127, 127, 0.10 ) );
}

.trb-kl-action-button:focus-visible {
	outline: 2px solid currentColor;
	outline-offset: 2px;
}

.trb-kl-action-button.is-logout { color: inherit; }
body.trb-kursliste.trb-kl-no-background { background: var( --trb-tv-bg ); }


/* Inhalt erst einblenden, sobald der Hintergrund geladen ist. Das verhindert
   beim hellen Overlay einen kurzen falschen Textkontrast auf schwarzem Grund. */
.trb-kl-has-background .trb-kl-wrap {
	opacity: 0;
	transition: opacity 0.24s ease;
}

.trb-kl-has-background.trb-bg-ready .trb-kl-wrap {
	opacity: 1;
}