/*
 * Temperatur-Umrechner (Celsius / Fahrenheit / Kelvin)
 * Sämtliche Regeln sind unter dem Namensraum ".tucfk-app" gekapselt,
 * damit weder das Theme noch andere Plugins beeinflusst werden und
 * umgekehrt globale Regeln die Darstellung möglichst nicht stören.
 */

.tucfk-app {
	/* Eigener Variablen-Namensraum, keine globalen CSS-Custom-Properties. */
	--tucfk-primary: #3452ff;
	--tucfk-primary-hover: #2a42d6;
	--tucfk-primary-contrast: #ffffff;
	--tucfk-danger: #d64545;
	--tucfk-danger-bg: #fdeceb;
	--tucfk-success: #1f9d63;

	--tucfk-text: #1c2130;
	--tucfk-text-muted: #626b7d;
	--tucfk-border: #e1e4ec;
	--tucfk-border-strong: #c9cede;
	--tucfk-bg: #ffffff;
	--tucfk-bg-subtle: #f6f7fb;

	--tucfk-radius-sm: 8px;
	--tucfk-radius-md: 12px;
	--tucfk-radius-lg: 16px;
	--tucfk-shadow: 0 2px 10px rgba(28, 33, 48, 0.06), 0 1px 2px rgba(28, 33, 48, 0.06);
	--tucfk-transition: 160ms ease;

	/* Keine eigene Schriftart: Theme-Typografie übernehmen. */
	font-family: inherit;
	color: var(--tucfk-text);
	line-height: 1.5;
	box-sizing: border-box;
	max-width: 780px;
	margin: 0 auto;
	position: relative;
}

.tucfk-app *,
.tucfk-app *::before,
.tucfk-app *::after {
	box-sizing: inherit;
	font-family: inherit;
}

.tucfk-card {
	background: var(--tucfk-bg);
	border: 1px solid var(--tucfk-border);
	border-radius: var(--tucfk-radius-lg);
	box-shadow: var(--tucfk-shadow);
	padding: 24px;
}

.tucfk-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	margin-bottom: 20px;
}

.tucfk-title {
	font-size: 1.15rem;
	font-weight: 600;
	margin: 0;
	color: var(--tucfk-text);
	line-height: 1.3;
}

.tucfk-icon-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 34px;
	padding: 0;
	border: 1px solid var(--tucfk-border);
	border-radius: 999px;
	background: var(--tucfk-bg-subtle);
	color: var(--tucfk-text-muted);
	cursor: pointer;
	transition: background var(--tucfk-transition), color var(--tucfk-transition), border-color var(--tucfk-transition);
	flex: 0 0 auto;
}

.tucfk-icon-btn svg {
	width: 18px;
	height: 18px;
	fill: none;
	stroke: currentColor;
	stroke-width: 1.8;
	stroke-linecap: round;
	stroke-linejoin: round;
}

.tucfk-icon-btn:hover,
.tucfk-icon-btn:focus-visible {
	background: var(--tucfk-primary);
	color: var(--tucfk-primary-contrast);
	border-color: var(--tucfk-primary);
}

.tucfk-field-row {
	display: grid;
	grid-template-columns: 1.3fr 1fr;
	gap: 12px;
	align-items: end;
	margin-bottom: 8px;
}

.tucfk-field {
	display: flex;
	flex-direction: column;
	gap: 6px;
	min-width: 0;
}

.tucfk-field label {
	font-size: 0.82rem;
	font-weight: 600;
	color: var(--tucfk-text-muted);
}

.tucfk-input,
.tucfk-select {
	width: 100%;
	padding: 10px 12px;
	font-size: 1rem;
	color: var(--tucfk-text);
	background: var(--tucfk-bg);
	border: 1.5px solid var(--tucfk-border-strong);
	border-radius: var(--tucfk-radius-sm);
	transition: border-color var(--tucfk-transition), box-shadow var(--tucfk-transition);
	appearance: none;
	-webkit-appearance: none;
}

.tucfk-select {
	background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23626b7d'%3e%3cpath d='M5.5 7.5l4.5 4.5 4.5-4.5' stroke='%23626b7d' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3e%3c/svg%3e");
	background-repeat: no-repeat;
	background-position: right 10px center;
	padding-right: 32px;
}

.tucfk-input:focus,
.tucfk-select:focus {
	outline: none;
	border-color: var(--tucfk-primary);
	box-shadow: 0 0 0 3px rgba(52, 82, 255, 0.16);
}

.tucfk-app .tucfk-input[aria-invalid="true"] {
	border-color: var(--tucfk-danger);
}

.tucfk-app .tucfk-input[aria-invalid="true"]:focus {
	box-shadow: 0 0 0 3px rgba(214, 69, 69, 0.16);
}

.tucfk-reset-btn {
	grid-column: 1 / -1;
	justify-self: start;
	background: none;
	border: none;
	color: var(--tucfk-text-muted);
	font-size: 0.85rem;
	font-weight: 600;
	cursor: pointer;
	padding: 4px 2px;
	text-decoration: underline;
	text-underline-offset: 3px;
	transition: color var(--tucfk-transition);
}

.tucfk-reset-btn:hover,
.tucfk-reset-btn:focus-visible {
	color: var(--tucfk-primary);
	outline: none;
}

.tucfk-error {
	background: var(--tucfk-danger-bg);
	color: var(--tucfk-danger);
	border: 1px solid rgba(214, 69, 69, 0.25);
	border-radius: var(--tucfk-radius-sm);
	padding: 10px 12px;
	font-size: 0.88rem;
	font-weight: 500;
	margin: 10px 0 0;
}

.tucfk-error[hidden] {
	display: none;
}

.tucfk-results {
	display: flex;
	flex-direction: column;
	gap: 10px;
	margin-top: 20px;
}

.tucfk-result {
	display: grid;
	grid-template-columns: auto 1fr auto auto;
	align-items: baseline;
	gap: 10px;
	padding: 14px 14px;
	background: var(--tucfk-bg-subtle);
	border: 1px solid var(--tucfk-border);
	border-radius: var(--tucfk-radius-md);
	transition: border-color var(--tucfk-transition), background var(--tucfk-transition);
}

.tucfk-result.is-source {
	border-color: var(--tucfk-primary);
	background: rgba(52, 82, 255, 0.06);
}

.tucfk-result-label {
	font-size: 0.82rem;
	font-weight: 600;
	color: var(--tucfk-text-muted);
	grid-row: 1;
}

.tucfk-result-value {
	font-size: 1.35rem;
	font-weight: 700;
	color: var(--tucfk-text);
	text-align: right;
	font-variant-numeric: tabular-nums;
	justify-self: end;
}

.tucfk-result-suffix {
	font-size: 0.95rem;
	font-weight: 600;
	color: var(--tucfk-text-muted);
}

.tucfk-copy-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 30px;
	height: 30px;
	padding: 0;
	border: 1px solid transparent;
	border-radius: var(--tucfk-radius-sm);
	background: transparent;
	color: var(--tucfk-text-muted);
	cursor: pointer;
	transition: background var(--tucfk-transition), color var(--tucfk-transition);
}

.tucfk-copy-btn svg {
	width: 16px;
	height: 16px;
	fill: none;
	stroke: currentColor;
	stroke-width: 1.8;
	stroke-linecap: round;
	stroke-linejoin: round;
}

.tucfk-copy-btn:hover,
.tucfk-copy-btn:focus-visible {
	background: var(--tucfk-primary);
	color: var(--tucfk-primary-contrast);
	outline: none;
}

.tucfk-copy-btn.is-copied {
	background: var(--tucfk-success);
	color: var(--tucfk-primary-contrast);
}

.tucfk-live-copy-status {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0 0 0 0);
	white-space: nowrap;
}

/* ---------- Modal ---------- */

.tucfk-modal-overlay {
	position: absolute;
	inset: 0;
	background: rgba(20, 23, 34, 0.5);
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 16px;
	border-radius: var(--tucfk-radius-lg);
	z-index: 100;
}

.tucfk-modal-overlay[hidden] {
	display: none;
}

.tucfk-modal {
	background: var(--tucfk-bg);
	border-radius: var(--tucfk-radius-lg);
	box-shadow: 0 12px 32px rgba(20, 23, 34, 0.24);
	width: 100%;
	max-width: 380px;
	max-height: 100%;
	overflow-y: auto;
	padding: 20px;
	border: 1px solid var(--tucfk-border);
}

.tucfk-modal-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	margin-bottom: 12px;
}

.tucfk-modal-header h3 {
	margin: 0;
	font-size: 1.05rem;
	font-weight: 700;
}

.tucfk-formula-list {
	list-style: none;
	margin: 0 0 14px;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.tucfk-formula-list li {
	background: var(--tucfk-bg-subtle);
	border: 1px solid var(--tucfk-border);
	border-radius: var(--tucfk-radius-sm);
	padding: 8px 10px;
	font-size: 0.92rem;
	font-variant-numeric: tabular-nums;
}

.tucfk-modal-note {
	font-size: 0.85rem;
	color: var(--tucfk-text-muted);
	margin: 0;
}

/* ---------- Responsive: Tablet & Smartphone ---------- */

@media (max-width: 480px) {
	.tucfk-card {
		padding: 18px;
		border-radius: var(--tucfk-radius-md);
	}

	.tucfk-field-row {
		grid-template-columns: 1fr;
	}

	.tucfk-reset-btn {
		justify-self: end;
	}

	.tucfk-result {
		grid-template-columns: 1fr auto auto;
		row-gap: 2px;
	}

	.tucfk-result-label {
		grid-column: 1 / -1;
	}

	.tucfk-result-value {
		font-size: 1.2rem;
	}
}

/* Sichtbarer Fokus für Tastaturbedienung, unabhängig vom Theme. */
.tucfk-app button:focus-visible,
.tucfk-app input:focus-visible,
.tucfk-app select:focus-visible {
	outline: 2px solid var(--tucfk-primary);
	outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
	.tucfk-app * {
		transition: none !important;
	}
}