/**
 * Frontend Stylesheet für BS WP ICS Feed Reader
 * Reines Vanilla CSS mit modernem CSS Grid, Flexbox, Accordion, Single View, Presets & a11y.
 */

:root {
	--bs-ics-cols: 3;
	--bs-ics-accent: #0073aa;
	--bs-ics-radius: 8px;
	--bs-ics-bg: #ffffff;
	--bs-ics-border-w: 1px;
	--bs-ics-border-c: #e2e8f0;

	/*
	 * UI-Chrome-Farben (Filterleiste, Kategorie-Chips, Kalender-Export-Menü, Leerzustand).
	 * Bewusst getrennt von --bs-ics-bg: diese Elemente haben eine eigene, nicht pro Feed
	 * konfigurierbare Hintergrundfarbe und dürfen daher auf ein dunkles Farbschema reagieren
	 * — anders als die Kachel selbst, deren Hintergrund/Text explizit vom Website-Betreiber
	 * gewählt wird und nicht automatisch "umkippen" darf.
	 */
	--bs-ics-chrome-bg: #f8fafc;
	--bs-ics-chrome-surface: #ffffff;
	--bs-ics-chrome-border: #e2e8f0;
	--bs-ics-chrome-border-strong: #cbd5e1;
	--bs-ics-chrome-text: #1e293b;
	--bs-ics-chrome-text-muted: #64748b;
	--bs-ics-chrome-text-subtle: #475569;
	--bs-ics-chrome-shadow: rgba(0, 0, 0, 0.12);
}

@media (prefers-color-scheme: dark) {
	:root {
		--bs-ics-chrome-bg: #1e2530;
		--bs-ics-chrome-surface: #262f3d;
		--bs-ics-chrome-border: #3a4657;
		--bs-ics-chrome-border-strong: #4a5568;
		--bs-ics-chrome-text: #e7ecf2;
		--bs-ics-chrome-text-muted: #9aa7b5;
		--bs-ics-chrome-text-subtle: #cbd5e1;
		--bs-ics-chrome-shadow: rgba(0, 0, 0, 0.4);
	}
}

/* Screenreader Utility (a11y) */
.bs-ics-sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* Wrapper */
.bs-ics-wrapper {
	box-sizing: border-box;
	width: 100%;
	margin: 24px 0;
	font-family: inherit;
}

.bs-ics-wrapper *,
.bs-ics-wrapper *::before,
.bs-ics-wrapper *::after {
	box-sizing: inherit;
}

/* Schnellfilter & Suche */
.bs-ics-filter-bar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 12px;
	margin-bottom: 20px;
	padding: 12px 16px;
	background-color: var(--bs-ics-chrome-bg);
	border: 1px solid var(--bs-ics-chrome-border);
	border-radius: var(--bs-ics-radius, 8px);
}

.bs-ics-search-wrap {
	display: inline-flex;
	align-items: center;
	position: relative;
	min-width: 220px;
	flex-grow: 1;
	max-width: 380px;
}

.bs-ics-search-icon {
	position: absolute;
	left: 10px;
	font-size: 0.9em;
	color: var(--bs-ics-chrome-text-muted);
	pointer-events: none;
}

.bs-ics-search-input {
	width: 100%;
	padding: 7px 10px 7px 32px;
	font-size: 0.88em;
	font-family: inherit;
	border: 1px solid var(--bs-ics-chrome-border-strong);
	border-radius: 6px;
	background: var(--bs-ics-chrome-surface);
	color: var(--bs-ics-chrome-text);
	outline: none;
	transition: border-color 0.15s ease-out, box-shadow 0.15s ease-out;
}

.bs-ics-search-input:focus {
	border-color: var(--bs-ics-accent, #0073aa);
	box-shadow: 0 0 0 2px rgba(0, 115, 170, 0.15);
}

.bs-ics-category-filters {
	display: inline-flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 6px;
}

.bs-ics-cat-btn {
	background: var(--bs-ics-chrome-surface);
	border: 1px solid var(--bs-ics-chrome-border-strong);
	border-radius: 9999px;
	padding: 4px 12px;
	font-size: 0.8em;
	font-weight: 500;
	color: var(--bs-ics-chrome-text-subtle);
	cursor: pointer;
	transition: all 0.15s ease-out;
}

.bs-ics-cat-btn:hover {
	border-color: var(--bs-ics-accent, #0073aa);
	color: var(--bs-ics-accent, #0073aa);
}

.bs-ics-cat-btn.is-active {
	background: var(--bs-ics-accent, #0073aa);
	border-color: var(--bs-ics-accent, #0073aa);
	color: #ffffff;
}

.bs-ics-cat-btn:focus-visible {
	outline: 2px solid var(--bs-ics-accent, #0073aa);
	outline-offset: 2px;
}

/* CSV-Export-Button (Filterleiste) */
.bs-ics-csv-export-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	background: var(--bs-ics-chrome-surface);
	border: 1px solid var(--bs-ics-chrome-border-strong);
	border-radius: 6px;
	padding: 6px 12px;
	font-size: 0.82em;
	font-weight: 600;
	color: var(--bs-ics-chrome-text-subtle);
	text-decoration: none;
	cursor: pointer;
	transition: all 0.15s ease-out;
	flex-shrink: 0;
}

.bs-ics-csv-export-btn:hover {
	background: var(--bs-ics-chrome-bg);
	border-color: var(--bs-ics-accent, #0073aa);
	color: var(--bs-ics-accent, #0073aa);
	text-decoration: none;
}

.bs-ics-csv-export-btn:focus-visible {
	outline: 2px solid var(--bs-ics-accent, #0073aa);
	outline-offset: 2px;
}

/* Container & Grid-Layout */
.bs-ics-container {
	width: 100%;
}

.bs-ics-layout-grid {
	display: grid;
	grid-template-columns: repeat(var(--bs-ics-cols, 3), minmax(0, 1fr));
	gap: 24px;
}

/* Listenansicht */
.bs-ics-layout-list {
	display: flex;
	flex-direction: column;
	gap: 16px;
}

/* Event-Karte */
.bs-ics-card {
	background-color: var(--bs-ics-bg, #ffffff);
	border: var(--bs-ics-border-w, 1px) solid var(--bs-ics-border-c, #e2e8f0);
	border-radius: var(--bs-ics-radius, 8px);
	padding: 20px;
	display: flex;
	flex-direction: column;
	gap: 12px;
	transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
	position: relative;
	overflow: visible;
}

/* Schatten-Varianten */
.bs-ics-shadow-none .bs-ics-card {
	box-shadow: none !important;
}

.bs-ics-shadow-subtle .bs-ics-card {
	box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.bs-ics-shadow-subtle .bs-ics-card:hover {
	box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
	transform: translateY(-2px);
}

.bs-ics-shadow-prominent .bs-ics-card {
	box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

.bs-ics-shadow-prominent .bs-ics-card:hover {
	box-shadow: 0 16px 30px -5px rgba(0, 0, 0, 0.12), 0 10px 12px -5px rgba(0, 0, 0, 0.06);
	transform: translateY(-3px);
}

/* Padding-Dichte Varianten */
.bs-ics-pad-compact .bs-ics-card {
	padding: 12px;
	gap: 8px;
}

.bs-ics-pad-normal .bs-ics-card {
	padding: 20px;
	gap: 12px;
}

.bs-ics-pad-spacious .bs-ics-card {
	padding: 28px;
	gap: 16px;
}

/* Design-Preset 1: Klassisch (Card mit oberer Akzentlinie) */
.bs-ics-style-card .bs-ics-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 4px;
	background-color: var(--bs-ics-accent, #0073aa);
	border-radius: var(--bs-ics-radius, 8px) var(--bs-ics-radius, 8px) 0 0;
}

/* Design-Preset 2: Minimal / Flat (Keine Extralinie, flaches Design) */
.bs-ics-style-flat .bs-ics-card {
	box-shadow: none !important;
}

.bs-ics-style-flat .bs-ics-card::before {
	display: none;
}

/* Design-Preset 3: Accent Header (Farbiger Kartenkopf) */
.bs-ics-style-accent_header .bs-ics-card {
	padding-top: 0 !important;
	overflow: hidden;
}

.bs-ics-style-accent_header .bs-ics-card::before {
	display: none;
}

.bs-ics-style-accent_header .bs-ics-card-header {
	background-color: var(--bs-ics-accent, #0073aa);
	margin-left: -28px;
	margin-right: -28px;
	padding: 12px 20px;
	border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.bs-ics-pad-compact.bs-ics-style-accent_header .bs-ics-card-header {
	margin-left: -12px;
	margin-right: -12px;
	padding: 8px 12px;
}

.bs-ics-pad-normal.bs-ics-style-accent_header .bs-ics-card-header {
	margin-left: -20px;
	margin-right: -20px;
	padding: 10px 18px;
}

.bs-ics-style-accent_header .bs-ics-date {
	color: #ffffff !important;
}

.bs-ics-style-accent_header .bs-ics-badge-allday,
.bs-ics-style-accent_header .bs-ics-badge-recurring {
	background-color: rgba(255, 255, 255, 0.25);
	color: #ffffff;
}

/* Theme-Farbvererbung */
.bs-ics-inherit-colors .bs-ics-title,
.bs-ics-inherit-colors .bs-ics-description,
.bs-ics-inherit-colors .bs-ics-meta {
	color: inherit !important;
}

.bs-ics-inherit-colors .bs-ics-link-btn,
.bs-ics-inherit-colors .bs-ics-read-more-btn {
	color: currentColor !important;
}

/* Header & Datum */
.bs-ics-card-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 8px;
}

.bs-ics-date {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 0.9em;
	font-weight: 600;
	color: var(--bs-ics-accent, #0073aa);
}

.bs-ics-date-icon {
	font-size: 1.1em;
	line-height: 1;
}

/* Badges */
.bs-ics-badge {
	display: inline-block;
	font-size: 0.75em;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.5px;
	padding: 2px 8px;
	border-radius: 9999px;
	background-color: #f1f5f9;
	color: #475569;
}

.bs-ics-badge-allday {
	background-color: #e0f2fe;
	color: #0369a1;
}

.bs-ics-badge-recurring {
	background-color: #ede9fe;
	color: #6d28d9;
}

/* Quellen-Badge auf der Kachel (nur bei zusammengeführten Kalendern sichtbar) */
.bs-ics-source-badge {
	display: inline-flex;
	align-items: center;
	gap: 5px;
	font-size: 0.75em;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.4px;
	color: #64748b;
}

.bs-ics-source-dot {
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: var(--bs-ics-source-color, currentColor);
	flex-shrink: 0;
}

/* Quellen-Filter-Buttons (gleiches Grundstyling wie Kategorie-Chips) */
.bs-ics-source-btn {
	display: inline-flex;
	align-items: center;
	gap: 5px;
}

.bs-ics-source-btn .bs-ics-source-dot {
	width: 7px;
	height: 7px;
}

/* Titel */
.bs-ics-title {
	margin: 0;
	font-size: 1.15em;
	font-weight: 700;
	line-height: 1.35;
	color: #0f172a;
}

/* Meta-Informationen */
.bs-ics-meta {
	display: flex;
	align-items: flex-start;
	gap: 6px;
	font-size: 0.9em;
	color: #64748b;
	line-height: 1.4;
}

.bs-ics-meta:empty {
	display: none;
}

.bs-ics-meta-icon {
	font-size: 1em;
	flex-shrink: 0;
}

.bs-ics-meta-label {
	font-weight: 600;
	color: #475569;
}

/* Beschreibung */
.bs-ics-description {
	font-size: 0.92em;
	color: #334155;
	line-height: 1.6;
	word-break: break-word;
}

.bs-ics-description:empty {
	display: none;
}

.bs-ics-description a {
	color: var(--bs-ics-accent, #0073aa);
	text-decoration: underline;
}

.bs-ics-description a:hover,
.bs-ics-description a:focus-visible {
	text-decoration: none;
	outline: 2px solid var(--bs-ics-accent, #0073aa);
	outline-offset: 2px;
}

/* Detail-Container für Aufklapp-Modus */
.bs-ics-card-details {
	display: none;
	padding-top: 14px;
	margin-top: 4px;
	border-top: 1px dashed #e2e8f0;
	flex-direction: column;
	gap: 12px;
}

.bs-ics-card-details.is-open {
	display: flex;
	animation: bsIcsFadeIn 0.2s ease-out;
}

@keyframes bsIcsFadeIn {
	from {
		opacity: 0;
		transform: translateY(-4px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* Card Footer & Aktionen */
.bs-ics-card-footer {
	margin-top: auto;
	padding-top: 8px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 8px;
}

.bs-ics-toggle-btn {
	background: transparent;
	border: 1px solid var(--bs-ics-accent, #0073aa);
	color: var(--bs-ics-accent, #0073aa);
	padding: 6px 14px;
	border-radius: var(--bs-ics-radius, 8px);
	cursor: pointer;
	font-family: inherit;
	font-size: 0.88em;
	font-weight: 600;
	display: inline-flex;
	align-items: center;
	gap: 6px;
	transition: background-color 0.15s ease-out, color 0.15s ease-out, transform 0.15s ease-out;
}

.bs-ics-toggle-btn:hover {
	background-color: var(--bs-ics-accent, #0073aa);
	color: #ffffff;
}

.bs-ics-toggle-btn:focus-visible {
	outline: 2px solid var(--bs-ics-accent, #0073aa);
	outline-offset: 2px;
}

.bs-ics-link-btn,
.bs-ics-read-more-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 0.88em;
	font-weight: 600;
	color: var(--bs-ics-accent, #0073aa);
	text-decoration: none;
	transition: color 0.15s ease, transform 0.15s ease;
	border-radius: 4px;
}

.bs-ics-link-btn:hover,
.bs-ics-read-more-btn:hover {
	text-decoration: underline;
	transform: translateX(2px);
}

.bs-ics-link-btn:focus-visible,
.bs-ics-read-more-btn:focus-visible {
	outline: 2px solid var(--bs-ics-accent, #0073aa);
	outline-offset: 2px;
}

/* „In Kalender eintragen“-Dropdown */
.bs-ics-cal-export {
	position: relative;
	display: inline-block;
}

.bs-ics-cal-btn {
	background: var(--bs-ics-chrome-bg);
	border: 1px solid var(--bs-ics-chrome-border-strong);
	border-radius: 6px;
	padding: 5px 10px;
	font-size: 0.8em;
	font-weight: 600;
	color: var(--bs-ics-chrome-text-subtle);
	cursor: pointer;
	display: inline-flex;
	align-items: center;
	gap: 4px;
	transition: all 0.15s ease-out;
}

.bs-ics-cal-btn:hover {
	background: var(--bs-ics-chrome-surface);
	border-color: var(--bs-ics-accent, #0073aa);
	color: var(--bs-ics-accent, #0073aa);
}

.bs-ics-cal-btn:focus-visible {
	outline: 2px solid var(--bs-ics-accent, #0073aa);
	outline-offset: 2px;
}

.bs-ics-cal-menu {
	position: absolute;
	bottom: 100%;
	right: 0;
	margin-bottom: 6px;
	background: var(--bs-ics-chrome-surface);
	border: 1px solid var(--bs-ics-chrome-border-strong);
	border-radius: 6px;
	box-shadow: 0 4px 16px var(--bs-ics-chrome-shadow);
	display: flex;
	flex-direction: column;
	min-width: 170px;
	z-index: 100;
	overflow: hidden;
	padding: 4px 0;
}

/* Öffnet nach unten statt oben, wenn oberhalb nicht genug Platz ist (siehe frontend.js) */
.bs-ics-cal-menu.is-below {
	bottom: auto;
	top: 100%;
	margin-bottom: 0;
	margin-top: 6px;
}

.bs-ics-cal-menu[hidden] {
	display: none !important;
}

.bs-ics-cal-menu a,
.bs-ics-cal-menu button {
	display: block;
	width: 100%;
	padding: 8px 12px;
	text-align: left;
	font-size: 0.82em;
	color: var(--bs-ics-chrome-text);
	text-decoration: none;
	background: transparent;
	border: none;
	cursor: pointer;
	font-family: inherit;
	transition: background-color 0.1s ease-out, color 0.1s ease-out;
}

.bs-ics-cal-menu a:hover,
.bs-ics-cal-menu button:hover,
.bs-ics-cal-menu a:focus-visible,
.bs-ics-cal-menu button:focus-visible {
	background-color: var(--bs-ics-chrome-bg);
	color: var(--bs-ics-accent, #0073aa);
	outline: none;
}

/* Einzelansicht (Single View) */
.bs-ics-single-view {
	max-width: 800px;
	margin: 24px auto;
}

.bs-ics-back-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 0.9em;
	font-weight: 600;
	color: var(--bs-ics-accent, #0073aa);
	text-decoration: none;
	margin-bottom: 16px;
	padding: 4px 8px;
	border-radius: 4px;
	transition: color 0.15s ease, transform 0.15s ease;
}

.bs-ics-back-btn:hover {
	text-decoration: underline;
	transform: translateX(-2px);
}

.bs-ics-single-card {
	padding: 28px;
	gap: 18px;
}

.bs-ics-single-card .bs-ics-title {
	font-size: 1.5em;
}

.bs-ics-single-card .bs-ics-description {
	font-size: 1em;
	line-height: 1.7;
}

.bs-ics-single-footer {
	border-top: 1px solid #e2e8f0;
	padding-top: 16px;
	margin-top: 8px;
}

/* Empty State */
.bs-ics-empty-container {
	padding: 30px;
	text-align: center;
	background-color: var(--bs-ics-chrome-bg);
	border: 1px dashed var(--bs-ics-chrome-border-strong);
	border-radius: var(--bs-ics-radius, 8px);
}

.bs-ics-empty-state p {
	margin: 0;
	color: var(--bs-ics-chrome-text-muted);
	font-size: 0.95em;
}

/* Responsive Anpassungen */
@media (max-width: 1024px) {
	.bs-ics-layout-grid {
		grid-template-columns: repeat(min(var(--bs-ics-cols, 2), 2), minmax(0, 1fr));
		gap: 18px;
	}
}

@media (max-width: 640px) {
	.bs-ics-filter-bar {
		flex-direction: column;
		align-items: stretch;
	}

	.bs-ics-search-wrap {
		max-width: 100%;
	}

	.bs-ics-layout-grid {
		grid-template-columns: 1fr;
		gap: 14px;
	}

	.bs-ics-card {
		padding: 16px;
	}

	.bs-ics-single-card {
		padding: 20px;
	}
}

/* Druckansicht */
@media print {
	.bs-ics-filter-bar,
	.bs-ics-card-footer,
	.bs-ics-back-btn,
	.bs-ics-toggle-btn,
	.bs-ics-cal-export {
		display: none !important;
	}

	.bs-ics-layout-grid {
		display: block;
	}

	.bs-ics-card {
		break-inside: avoid;
		page-break-inside: avoid;
		border: 1px solid #94a3b8;
		box-shadow: none !important;
		margin-bottom: 16px;
	}

	.bs-ics-card::before {
		display: none;
	}

	.bs-ics-card-details {
		display: flex !important;
	}
}