.rt-duesenrechner {
	--rt-black: #111111;
	--rt-black-hover: #2a2a2a;
	--rt-black-soft: #3d3d3d;

	--rt-accent: #e31e24;
	--rt-accent-soft: #fff3f3;

	--rt-bg: #f7f7f7;
	--rt-card: #ffffff;
	--rt-border: #d9d9d9;
	--rt-border-dark: #111111;

	--rt-text: #111111;
	--rt-muted: #656565;

	max-width: 980px;
	margin: 35px auto;
	padding: 42px;
	background: var(--rt-card);
	border: 1px solid #dedede;
	border-radius: 20px;
	box-shadow:
		0 22px 60px rgba(0, 0, 0, .08),
		0 3px 10px rgba(0, 0, 0, .03);
	font-family: inherit;
	color: var(--rt-text);
}

.rt-duesenrechner * {
	box-sizing: border-box;
}

/* HEADER */

.rt-duesenrechner__header {
	position: relative;
	margin-bottom: 30px;
	padding-left: 22px;
}

.rt-duesenrechner__header::before {
	content: "";
	position: absolute;
	top: 3px;
	bottom: 3px;
	left: 0;
	width: 5px;
	border-radius: 10px;
	background: var(--rt-black);
}

.rt-duesenrechner__kicker {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	margin-bottom: 10px;
	color: var(--rt-accent);
	font-size: 13px;
	font-weight: 850;
	letter-spacing: .11em;
	text-transform: uppercase;
}

.rt-duesenrechner__kicker::before {
	content: "";
	width: 22px;
	height: 2px;
	background: currentColor;
}

.rt-duesenrechner__header h2 {
	margin: 0 0 12px;
	color: var(--rt-black);
	font-size: clamp(31px, 4vw, 48px);
	font-weight: 850;
	letter-spacing: -.035em;
	line-height: 1.08;
}

.rt-duesenrechner__header p {
	max-width: 720px;
	margin: 0;
	color: var(--rt-muted);
	font-size: 17px;
	line-height: 1.65;
}

/* FORMULARZ */

.rt-duesenrechner__form {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 24px;
	padding: 30px;
	background: #f6f6f6;
	border: 1px solid #e1e1e1;
	border-radius: 16px;
}

.rt-duesenrechner__field {
	min-width: 0;
}

.rt-duesenrechner__field label {
	display: block;
	margin-bottom: 10px;
	color: var(--rt-black);
	font-size: 15px;
	font-weight: 800;
}

.rt-duesenrechner__field small {
	display: block;
	margin-top: 9px;
	color: var(--rt-muted);
	font-size: 12.5px;
	line-height: 1.45;
}

/* INPUT */

.rt-duesenrechner__input-wrap {
	display: flex;
	align-items: stretch;
	overflow: hidden;
	width: 100%;
	min-height: 58px;
	background: #fff;
	border: 2px solid var(--rt-border-dark);
	border-radius: 10px;
	box-shadow: none;
	transition:
		box-shadow .2s ease,
		transform .2s ease,
		background-color .2s ease;
}

.rt-duesenrechner__input-wrap:hover {
	background: #fcfcfc;
}

.rt-duesenrechner__input-wrap:focus-within {
	border-color: var(--rt-black);
	box-shadow: 0 0 0 4px rgba(0, 0, 0, .10);
	transform: translateY(-1px);
}

.rt-duesenrechner__input-wrap input {
	min-width: 0;
	width: 100%;
	height: 56px;
	padding: 0 18px;
	border: 0 !important;
	outline: 0;
	background: transparent;
	color: var(--rt-black);
	font: inherit;
	font-size: 18px;
	font-weight: 750;
	box-shadow: none !important;
}

.rt-duesenrechner__input-wrap input::placeholder {
	color: #898989;
	font-weight: 600;
	opacity: 1;
}

.rt-duesenrechner__input-wrap > span {
	display: flex;
	align-items: center;
	justify-content: center;
	align-self: stretch;
	min-width: 74px;
	padding: 0 17px;
	background: var(--rt-black);
	border-left: 2px solid var(--rt-black);
	color: #fff;
	font-size: 14px;
	font-weight: 800;
	white-space: nowrap;
}

/* WASSERMENGE + SELECT */

.rt-duesenrechner__flow-row {
	display: grid;
	grid-template-columns: minmax(140px, 1fr) minmax(190px, auto);
	gap: 11px;
}

.rt-duesenrechner select {
	width: 100%;
	min-height: 58px;
	padding: 0 42px 0 16px;
	border: 2px solid var(--rt-border-dark);
	border-radius: 10px;
	background-color: #fff;
	color: var(--rt-black);
	font: inherit;
	font-size: 14px;
	font-weight: 750;
	outline: none;
	cursor: pointer;
	box-shadow: none;
	transition:
		box-shadow .2s ease,
		transform .2s ease,
		background-color .2s ease;
}

.rt-duesenrechner select:hover {
	background-color: #fcfcfc;
}

.rt-duesenrechner select:focus {
	border-color: var(--rt-black);
	box-shadow: 0 0 0 4px rgba(0, 0, 0, .10);
	transform: translateY(-1px);
}

/* BUTTON */

.rt-duesenrechner__button {
	position: relative;
	grid-column: 1 / -1;
	overflow: hidden;
	min-height: 60px;
	margin-top: 3px;
	padding: 16px 28px;
	border: 2px solid var(--rt-black);
	border-radius: 10px;
	background: var(--rt-black);
	box-shadow: 0 9px 22px rgba(0, 0, 0, .17);
	color: #fff;
	font: inherit;
	font-size: 17px;
	font-weight: 850;
	letter-spacing: -.01em;
	cursor: pointer;
	transition:
		transform .2s ease,
		box-shadow .2s ease,
		background-color .2s ease,
		color .2s ease;
}

.rt-duesenrechner__button::after {
	content: "→";
	display: inline-block;
	margin-left: 10px;
	font-size: 20px;
	line-height: 1;
	transition: transform .2s ease;
}

.rt-duesenrechner__button:hover {
	background: #fff;
	color: var(--rt-black);
	box-shadow: 0 12px 26px rgba(0, 0, 0, .15);
	transform: translateY(-2px);
}

.rt-duesenrechner__button:hover::after {
	transform: translateX(4px);
}

.rt-duesenrechner__button:active {
	transform: translateY(0);
}

/* ERROR */

.rt-duesenrechner__error {
	grid-column: 1 / -1;
	padding: 15px 17px;
	border: 1px solid #efb3b5;
	border-left: 5px solid var(--rt-accent);
	border-radius: 8px;
	background: var(--rt-accent-soft);
	color: #98181c;
	font-size: 14px;
	font-weight: 700;
	line-height: 1.55;
}

/* RESULT */

.rt-duesenrechner__result {
	position: relative;
	overflow: hidden;
	margin-top: 25px;
	padding: 30px;
	border: 2px solid var(--rt-black);
	border-top-width: 6px;
	border-radius: 14px;
	background: #fff;
	box-shadow: 0 13px 32px rgba(0, 0, 0, .08);
}

.rt-duesenrechner__result::after {
	content: "";
	position: absolute;
	top: -100px;
	right: -100px;
	width: 240px;
	height: 240px;
	border-radius: 50%;
	background: rgba(0, 0, 0, .035);
	pointer-events: none;
}

.rt-duesenrechner__result-main {
	position: relative;
	z-index: 1;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 25px;
	padding-bottom: 23px;
	border-bottom: 1px solid #dcdcdc;
}

.rt-duesenrechner__result-main span {
	max-width: 380px;
	color: var(--rt-black);
	font-size: 16px;
	font-weight: 800;
	line-height: 1.5;
}

.rt-duesenrechner__result-main strong {
	color: var(--rt-black);
	font-size: clamp(48px, 7vw, 76px);
	font-weight: 900;
	letter-spacing: -.055em;
	line-height: .95;
}

.rt-duesenrechner__result-grid {
	position: relative;
	z-index: 1;
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 14px;
	margin-top: 23px;
}

.rt-duesenrechner__result-grid > div {
	padding: 19px;
	background: #f7f7f7;
	border: 1px solid #d8d8d8;
	border-radius: 10px;
	box-shadow: none;
}

.rt-duesenrechner__result-grid span {
	display: block;
	margin-bottom: 8px;
	color: var(--rt-muted);
	font-size: 12px;
	font-weight: 600;
	line-height: 1.4;
}

.rt-duesenrechner__result-grid strong {
	display: block;
	color: var(--rt-black);
	font-size: 19px;
	font-weight: 850;
}

/* INFO */

.rt-duesenrechner__info {
	margin: 20px 0 0;
	padding: 15px 17px;
	border: 1px solid #dedede;
	border-left: 4px solid var(--rt-black);
	border-radius: 8px;
	background: #f6f6f6;
	color: #444;
	font-size: 14px;
	font-weight: 600;
	line-height: 1.65;
}

/* NOTICE */

.rt-duesenrechner__notice {
	position: relative;
	margin-top: 22px;
	padding: 18px 20px 18px 24px;
	border: 1px solid #dcdcdc;
	border-left: 5px solid var(--rt-black);
	border-radius: 8px;
	background: #f7f7f7;
	color: var(--rt-muted);
	font-size: 13.5px;
	line-height: 1.65;
}

.rt-duesenrechner__notice strong {
	color: var(--rt-black);
	font-weight: 850;
}

/* RESPONSIVE */

@media (max-width: 800px) {
	.rt-duesenrechner {
		margin: 20px auto;
		padding: 27px;
		border-radius: 16px;
	}

	.rt-duesenrechner__header {
		padding-left: 17px;
	}

	.rt-duesenrechner__form {
		grid-template-columns: 1fr;
		padding: 23px;
	}

	.rt-duesenrechner__button,
	.rt-duesenrechner__error {
		grid-column: auto;
	}
}

@media (max-width: 560px) {
	.rt-duesenrechner {
		margin: 15px 0;
		padding: 20px;
		border-radius: 13px;
	}

	.rt-duesenrechner__header {
		margin-bottom: 23px;
		padding-left: 14px;
	}

	.rt-duesenrechner__header h2 {
		font-size: 30px;
	}

	.rt-duesenrechner__header p {
		font-size: 15px;
	}

	.rt-duesenrechner__form {
		gap: 20px;
		padding: 18px;
		border-radius: 12px;
	}

	.rt-duesenrechner__flow-row {
		grid-template-columns: 1fr;
	}

	.rt-duesenrechner__input-wrap,
	.rt-duesenrechner select {
		min-height: 54px;
	}

	.rt-duesenrechner__input-wrap input {
		height: 52px;
		font-size: 17px;
	}

	.rt-duesenrechner__button {
		min-height: 56px;
		padding: 14px 18px;
		font-size: 15px;
	}

	.rt-duesenrechner__result {
		padding: 22px;
	}

	.rt-duesenrechner__result-main {
		align-items: flex-start;
		flex-direction: column;
		gap: 17px;
	}

	.rt-duesenrechner__result-main strong {
		font-size: 58px;
	}

	.rt-duesenrechner__result-grid {
		grid-template-columns: 1fr;
	}
}