/**
 * sections.css – Sektionen der Landingpage.
 *
 * Jede Sektion ist in sich abgeschlossen und kann einzeln entfernt,
 * verschoben oder auf anderen Seiten wiederverwendet werden.
 */

/* --------------------------------------------------------------------------
   1. Auftakt mit Lernlandschaft
   -------------------------------------------------------------------------- */

.hero {
	position: relative;
	display: grid;
	grid-template-columns: 1.15fr 1fr;
	min-height: calc(100vh - var(--header-height));
	padding: var(--gutter);
	overflow: hidden;
}

.hero__copy {
	position: relative;
	z-index: 3;
	grid-column: 2;
	align-self: center;
}

.hero__title {
	margin: 30px 0;
	font-size: clamp(55px, 6.7vw, 102px);
	font-weight: 650;
	line-height: 0.85;
	letter-spacing: -0.075em;
}

.hero__title em {
	color: var(--blue);
	font-style: normal;
}

.hero__lead {
	max-width: 470px;
	font-size: 18px;
	line-height: 1.5;
}

.hero__discover {
	display: inline-flex;
	align-items: center;
	gap: 25px;
	margin-top: 5vh;
	font-family: var(--mono);
	font-size: 11px;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	text-decoration: none;
}

.hero__discover span {
	display: grid;
	place-items: center;
	width: 46px;
	height: 46px;
	border: 1px solid currentColor;
	border-radius: 50%;
	transition: transform var(--duration) var(--ease);
}

.hero__discover:hover span {
	transform: translateY(4px);
}

/* Orbit – abstrakte Lernlandschaft aus Kreisen und Knoten. */
.orbit {
	position: absolute;
	left: -6vw;
	top: 50%;
	width: 60vw;
	height: 60vw;
	max-width: 850px;
	max-height: 850px;
	border: 1px solid var(--line);
	border-radius: 50%;
	transform: translateY(-50%);
}

.orbit::before {
	content: "";
	position: absolute;
	inset: 17%;
	border: 1px solid rgba(18, 61, 60, 0.18);
	border-radius: 50%;
}

/* Zweite, deckungsgleiche Ebene: trägt nur die bedienbaren Knoten,
   damit der dekorative Teil aria-hidden bleiben kann. */
.orbit--interactive,
.orbit--interactive::before {
	border-color: transparent;
}

.orbit__line {
	position: absolute;
	left: 50%;
	top: 50%;
	width: 75%;
	height: 1px;
	background: var(--line);
	transform-origin: 0;
}

.orbit__line--a { transform: rotate(25deg); }
.orbit__line--b { transform: rotate(-38deg); }

.orbit__node {
	position: absolute;
	z-index: 2;
	display: grid;
	place-items: center;
	border: 0;
	border-radius: 50%;
	padding: 10px;
	text-align: center;
	transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.orbit__node:hover,
.orbit__node.is-active {
	transform: scale(1.12);
	box-shadow: var(--shadow-lift);
}

.orbit__node span {
	font-family: var(--mono);
	font-size: 10px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.orbit__node--learn {
	left: 42%;
	top: 9%;
	width: 120px;
	height: 120px;
	background: var(--yellow);
}

.orbit__node--connect {
	right: 3%;
	top: 41%;
	width: 145px;
	height: 145px;
	background: var(--blue);
	color: #fff;
}

.orbit__node--grow {
	left: 31%;
	bottom: 8%;
	width: 135px;
	height: 135px;
	background: var(--coral);
}

.orbit__tiny {
	position: absolute;
	width: 15px;
	height: 15px;
	border-radius: 50%;
	background: var(--aqua);
}

.orbit__tiny--1 { left: 20%; top: 28%; }
.orbit__tiny--2 { right: 22%; bottom: 18%; background: var(--yellow); }
.orbit__tiny--3 { left: 10%; bottom: 37%; background: var(--blue); }

.hero__note {
	position: absolute;
	z-index: 4;
	left: var(--gutter);
	bottom: 5vh;
	width: 270px;
	padding: 19px;
	background: var(--paper);
	box-shadow: var(--shadow-soft);
}

.hero__note-label {
	font-family: var(--mono);
	font-size: 9px;
	text-transform: uppercase;
	color: var(--blue);
}

.hero__note-title {
	display: block;
	margin: 8px 0;
	font-size: 19px;
}

.hero__note p {
	margin: 0;
	font-size: 12px;
	line-height: 1.4;
}

/* --------------------------------------------------------------------------
   2. Beitrag – Leitsatz
   -------------------------------------------------------------------------- */

.purpose {
	padding: 10vw 6vw;
	background: var(--mint);
}

.purpose__sentence {
	display: flex;
	flex-wrap: wrap;
	gap: 0.08em 0.2em;
	max-width: 1250px;
	margin: 5vw 0 0;
	font-size: clamp(42px, 6vw, 87px);
	line-height: 1.08;
	letter-spacing: -0.06em;
}

/* --------------------------------------------------------------------------
   3. Felder – klaskool, Lumanio, Zukunft
   -------------------------------------------------------------------------- */

.worlds {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 18px;
	padding: 7vw var(--gutter);
}

.world {
	position: relative;
	min-height: 580px;
	padding: 40px;
	overflow: hidden;
}

.world__label {
	font-family: var(--mono);
	font-size: 9px;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}

.world__title {
	position: relative;
	z-index: 2;
	margin: 20vh 0 20px;
	font-size: clamp(60px, 8vw, 115px);
	line-height: 0.85;
	letter-spacing: -0.08em;
}

.world__text {
	position: relative;
	z-index: 2;
	max-width: 390px;
	font-size: 17px;
	line-height: 1.5;
}

.world .link-button {
	position: absolute;
	z-index: 2;
	left: 40px;
	bottom: 40px;
}

.world--klaskool {
	background: var(--blue);
	color: #fff;
}

.world--lumanio {
	background: var(--yellow);
}

.world--next {
	grid-column: 1 / -1;
	min-height: 430px;
	background: var(--ink);
	color: #fff;
}

.world--next .world__title {
	margin: 10vh 0 0;
}

.world__orbit {
	position: absolute;
	right: -10%;
	top: -25%;
	width: 420px;
	height: 420px;
	border: 1px solid var(--line-inverse);
	border-radius: 50%;
}

.world__orbit::after {
	content: "";
	position: absolute;
	inset: 25%;
	border: 1px solid var(--line-inverse);
	border-radius: 50%;
}

.world__sun {
	position: absolute;
	right: -6%;
	top: -10%;
	width: 270px;
	height: 270px;
	border-radius: 50%;
	background: var(--coral);
}

.world .big-plus {
	position: absolute;
	right: 8%;
	top: 50%;
	transform: translateY(-50%);
}

.world .big-plus:hover {
	transform: translateY(-50%) scale(1.06);
}

/* --------------------------------------------------------------------------
   4. Kompass – Werte
   -------------------------------------------------------------------------- */

.values {
	display: grid;
	grid-template-columns: 0.75fr 1.25fr;
	gap: 6vw;
	padding: 10vw var(--gutter);
	background: var(--paper);
}

.values__title {
	margin: 5vh 0 25px;
	font-size: clamp(52px, 6vw, 90px);
	line-height: 0.9;
	letter-spacing: -0.07em;
}

.values__lead {
	max-width: 330px;
	line-height: 1.5;
}

.values__wheel {
	display: grid;
	grid-template-columns: 1fr 1fr;
	aspect-ratio: 1;
	border: 1px solid var(--line-strong);
	border-radius: 50%;
	overflow: hidden;
}

.value {
	position: relative;
	padding: 12%;
	border-right: 1px solid var(--line);
	border-bottom: 1px solid var(--line);
}

.value:nth-child(2n) { border-right: 0; }
.value:nth-child(n + 3) { border-bottom: 0; }

.value__number {
	font-family: var(--mono);
	font-size: 9px;
	color: var(--blue);
}

.value h3 {
	margin: 5vh 0 8px;
	font-size: 23px;
	line-height: normal;
	letter-spacing: normal;
}

.value p {
	margin: 0;
	font-size: 13px;
	line-height: 1.4;
	opacity: 0.7;
}

/* --------------------------------------------------------------------------
   5. Wirkung
   -------------------------------------------------------------------------- */

.impact {
	display: grid;
	grid-template-columns: 1.15fr 0.85fr;
	min-height: 700px;
	background: var(--coral);
}

.impact__media {
	position: relative;
	min-height: 600px;
	overflow: hidden;
}

.impact__media img {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	mix-blend-mode: multiply;
	filter: grayscale(1) contrast(0.9);
}

/* Ersatzmotiv, solange kein Bild hinterlegt ist. */
.impact__media--placeholder img {
	mix-blend-mode: normal;
	filter: none;
	opacity: 0.9;
}

.impact__copy {
	display: flex;
	flex-direction: column;
	justify-content: center;
	padding: 6vw;
}

.impact__title {
	margin: 30px 0;
	font-size: clamp(55px, 6vw, 90px);
	line-height: 0.85;
	letter-spacing: -0.07em;
}

.impact__copy > p:not(.eyebrow) {
	max-width: 440px;
	line-height: 1.5;
}

.impact__copy .button--outline {
	align-self: flex-start;
	margin-top: 5vh;
}

/* --------------------------------------------------------------------------
   Reaktionsstufen
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
	.hero {
		grid-template-columns: 1fr;
		min-height: 920px;
		padding: 60px var(--gutter-min);
	}

	.hero__copy {
		grid-column: 1;
		align-self: start;
	}

	.orbit {
		top: auto;
		bottom: -20%;
		left: -28%;
		width: 100vw;
		height: 100vw;
		transform: none;
	}

	.hero__note {
		left: auto;
		right: var(--gutter-min);
		bottom: 35px;
	}

	.purpose {
		padding: 90px var(--gutter-min);
	}

	.values {
		grid-template-columns: 1fr;
		padding: 90px var(--gutter-min);
	}

	.values__wheel {
		margin-top: 40px;
	}

	.worlds {
		grid-template-columns: 1fr;
		padding: 60px 18px;
	}

	.world--next {
		grid-column: 1;
	}

	.world .big-plus {
		right: 30px;
		width: 120px;
		height: 120px;
		font-size: 70px;
	}

	.impact {
		grid-template-columns: 1fr;
	}

	.impact__media {
		min-height: 500px;
	}

	.impact__copy {
		padding: 80px var(--gutter-min);
	}
}

@media (max-width: 560px) {
	.hero__title {
		font-size: 54px;
	}

	.hero__lead {
		font-size: 16px;
	}

	.orbit {
		width: 130vw;
		height: 130vw;
	}

	.orbit__node--learn { width: 85px; height: 85px; }
	.orbit__node--connect { width: 105px; height: 105px; }
	.orbit__node--grow { width: 95px; height: 95px; }

	.hero__note {
		width: 235px;
	}

	.world {
		min-height: 500px;
		padding: 28px;
	}

	.world__title {
		font-size: 60px;
	}

	.world--next .world__title {
		font-size: 50px;
	}

	.purpose__sentence {
		font-size: 38px;
	}

	.world .link-button {
		left: 28px;
	}

	.world .big-plus {
		right: 25px;
		top: auto;
		bottom: 30px;
		width: 100px;
		height: 100px;
		font-size: 70px;
		transform: none;
	}

	.world .big-plus:hover {
		transform: scale(1.06);
	}

	.values__wheel {
		grid-template-columns: 1fr;
		aspect-ratio: auto;
		border-radius: 0;
	}

	.value {
		min-height: 220px;
		border-right: 0;
		border-bottom: 1px solid var(--line) !important;
	}

	.value:last-child {
		border-bottom: 0 !important;
	}
}