/* ============================================================
   MAIN.CSS — Koch Baggerarbeiten (Schicht 2, KDS-Base-Layout)
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
	margin: 0;
	font-family: var(--k-font-body);
	font-size: var(--k-fs-body);
	line-height: 1.65;
	color: var(--k-text);
	background: var(--k-weiss);
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; }

:focus-visible {
	outline: 3px solid var(--k-signal);
	outline-offset: 2px;
}

.inhalt {
	width: min(var(--k-content-breite), 92%);
	margin-inline: auto;
}

.icon { width: 44px; height: 44px; }

/* ------------------------------------------------------------- Buttons */

.btn {
	display: inline-block;
	padding: 0.85rem 1.7rem;
	font-family: var(--k-font-display);
	font-weight: 700;
	font-size: 0.95rem;
	letter-spacing: 0.02em;
	text-decoration: none;
	border-radius: var(--k-radius);
	border: 2px solid transparent;
	cursor: pointer;
	transition: background var(--k-uebergang), color var(--k-uebergang), border-color var(--k-uebergang);
}

.btn--signal {
	background: var(--k-signal);
	color: var(--k-anthrazit-tief);
}
.btn--signal:hover { background: var(--k-signal-dunkel); }

.btn--kontur {
	background: transparent;
	color: var(--k-text-invers);
	border-color: rgba(247, 245, 241, 0.5);
}
.btn--kontur:hover { border-color: var(--k-signal); color: var(--k-signal); }

/* -------------------------------------------------------------- Header */

.site-header {
	position: sticky;
	top: 0;
	z-index: 50;
	background: var(--k-anthrazit-tief);
	color: var(--k-text-invers);
	border-bottom: 3px solid var(--k-signal);
}

.site-header__zeile {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1.5rem;
	padding-block: 0.9rem;
}

.site-logo {
	font-family: var(--k-font-display);
	font-weight: 800;
	font-size: 1.15rem;
	line-height: 1.1;
	text-decoration: none;
	text-transform: uppercase;
	letter-spacing: 0.03em;
}
.site-logo span { color: var(--k-signal); display: block; font-size: 0.7rem; letter-spacing: 0.22em; }

.hauptmenue { display: flex; gap: 1.6rem; list-style: none; margin: 0; padding: 0; }
.hauptmenue a {
	text-decoration: none;
	font-size: 0.92rem;
	font-weight: 600;
	opacity: 0.85;
}
.hauptmenue a:hover { opacity: 1; color: var(--k-signal); }

.site-header__tel {
	font-family: var(--k-font-display);
	font-weight: 700;
	text-decoration: none;
	color: var(--k-signal);
	white-space: nowrap;
}

.menue-toggle { display: none; }

@media (max-width: 860px) {
	.menue-toggle {
		display: inline-flex;
		align-items: center;
		gap: 0.5rem;
		background: none;
		border: 1px solid rgba(247, 245, 241, 0.4);
		color: var(--k-text-invers);
		border-radius: var(--k-radius);
		padding: 0.5rem 0.9rem;
		font: inherit;
		cursor: pointer;
	}
	.site-nav { display: none; width: 100%; }
	.site-nav.ist-offen { display: block; padding-bottom: 1rem; }
	.hauptmenue { flex-direction: column; gap: 0.8rem; }
	.site-header__zeile { flex-wrap: wrap; }
}

/* ------------------------------------------------------------ Sektionen */

.sektion { padding-block: var(--k-abstand-sektion); }

.sektion--sand { background: var(--k-sand); }

.sektion--dunkel {
	background: var(--k-anthrazit-tief);
	color: var(--k-text-invers);
}

/* Signatur: diagonaler Baugruben-Schnitt */
.schnitt-unten { clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--k-schnitt)), 0 100%); }
.schnitt-oben  { clip-path: polygon(0 var(--k-schnitt), 100% 0, 100% 100%, 0 100%); }
.schnitt-beide { clip-path: polygon(0 var(--k-schnitt), 100% 0, 100% calc(100% - var(--k-schnitt)), 0 100%); }

.eyebrow {
	display: inline-block;
	font-family: var(--k-font-display);
	font-size: var(--k-fs-klein);
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--k-erde);
	margin-bottom: 0.8rem;
}
.sektion--dunkel .eyebrow { color: var(--k-signal); }

.sektion__titel {
	font-family: var(--k-font-display);
	font-size: var(--k-fs-h2);
	font-weight: 800;
	line-height: 1.15;
	margin: 0 0 0.8rem;
}

.sektion__intro { max-width: 620px; color: var(--k-text-gedimmt); margin: 0 0 2.5rem; }
.sektion--dunkel .sektion__intro { color: rgba(247, 245, 241, 0.75); }

/* ----------------------------------------------------------------- Hero */

.hero {
	position: relative;
	background: var(--k-anthrazit-tief);
	color: var(--k-text-invers);
	padding-block: clamp(5rem, 12vw, 9rem) calc(var(--k-abstand-sektion) + var(--k-schnitt));
	overflow: hidden;
}

/* dezente Höhenlinien als Hintergrund (Gelände) */
.hero::before {
	content: "";
	position: absolute;
	inset: 0;
	background:
		radial-gradient(ellipse 120% 70% at 85% 110%, rgba(138, 106, 79, 0.35), transparent 60%),
		repeating-linear-gradient(115deg, transparent 0 90px, rgba(247, 245, 241, 0.04) 90px 92px);
	pointer-events: none;
}

.hero .inhalt { position: relative; }

.hero__headline {
	font-family: var(--k-font-display);
	font-size: var(--k-fs-hero);
	font-weight: 800;
	line-height: 1.05;
	letter-spacing: -0.01em;
	margin: 0 0 1.2rem;
	max-width: 14ch;
}
.hero__headline em {
	font-style: normal;
	color: var(--k-signal);
}

.hero__subline { max-width: 560px; font-size: 1.08rem; color: rgba(247, 245, 241, 0.82); margin: 0 0 2.2rem; }

.hero__ctas { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 3.5rem; }

.hero__fakten {
	display: flex;
	flex-wrap: wrap;
	gap: 2.5rem;
	padding-top: 1.6rem;
	border-top: 1px solid rgba(247, 245, 241, 0.15);
	list-style: none;
	margin: 0;
	padding-left: 0;
	padding-right: 0;
}
.hero__fakten strong {
	display: block;
	font-family: var(--k-font-display);
	font-size: 1.15rem;
	color: var(--k-signal);
}
.hero__fakten span { font-size: var(--k-fs-klein); color: rgba(247, 245, 241, 0.7); }

/* Warnstreifen-Signatur unter dem Hero */
.warnstreifen {
	height: 10px;
	background: var(--k-warnstreifen);
}

/* ------------------------------------------------------------ Leistungen */

.leistungen__raster {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 1.4rem;
}

.leistung-karte {
	background: var(--k-weiss);
	border: 1px solid var(--k-sand-tief);
	border-radius: var(--k-radius);
	padding: 1.8rem 1.6rem;
	box-shadow: var(--k-schatten);
	transition: transform var(--k-uebergang), border-color var(--k-uebergang);
}
.leistung-karte:hover { transform: translateY(-4px); border-color: var(--k-signal); }

.leistung-karte .icon { color: var(--k-erde); margin-bottom: 1rem; }

.leistung-karte h3 {
	font-family: var(--k-font-display);
	font-size: var(--k-fs-h3);
	font-weight: 700;
	margin: 0 0 0.5rem;
}
.leistung-karte p { margin: 0; color: var(--k-text-gedimmt); font-size: 0.95rem; }

/* -------------------------------------------------------------- Projekte */

.projekte__raster {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 1.4rem;
}

.projekt-karte {
	border-radius: var(--k-radius);
	overflow: hidden;
	background: var(--k-weiss);
	border: 1px solid var(--k-sand-tief);
	box-shadow: var(--k-schatten);
}

.projekt-karte__bild {
	aspect-ratio: 4 / 3;
	display: grid;
	place-items: center;
	background:
		linear-gradient(160deg, var(--k-sand) 50%, var(--k-sand-tief) 50%);
	color: var(--k-erde);
	font-family: var(--k-font-display);
	font-weight: 700;
	font-size: 0.85rem;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}

.projekt-karte__meta { padding: 1.1rem 1.3rem; }
.projekt-karte__meta h3 { font-family: var(--k-font-display); font-size: 1.02rem; margin: 0 0 0.2rem; }
.projekt-karte__meta span { font-size: var(--k-fs-klein); color: var(--k-text-gedimmt); }

.projekte__hinweis { margin-top: 1.6rem; font-size: var(--k-fs-klein); color: var(--k-text-gedimmt); }

/* -------------------------------------------------------------- Über uns */

.ueberuns__spalten {
	display: grid;
	grid-template-columns: 1.1fr 1fr;
	gap: 3.5rem;
	align-items: start;
}
@media (max-width: 860px) { .ueberuns__spalten { grid-template-columns: 1fr; } }

.werte { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.1rem; }
.werte li {
	background: var(--k-weiss);
	border-left: 4px solid var(--k-signal);
	border-radius: 0 var(--k-radius) var(--k-radius) 0;
	padding: 1rem 1.3rem;
	box-shadow: var(--k-schatten);
}
.werte strong { font-family: var(--k-font-display); display: block; margin-bottom: 0.15rem; }
.werte p { margin: 0; font-size: 0.92rem; color: var(--k-text-gedimmt); }

/* ---------------------------------------------------------------- Ahrtal */

.ahrtal { position: relative; }
.ahrtal .inhalt { max-width: 760px; }
.ahrtal__text { font-size: 1.06rem; color: rgba(247, 245, 241, 0.85); }
.ahrtal__hinweis { font-size: var(--k-fs-klein); color: rgba(247, 245, 241, 0.5); margin-top: 1.5rem; }

/* ---------------------------------------------------------- Einzugsgebiet */

.orte-liste { display: flex; flex-wrap: wrap; gap: 0.6rem; list-style: none; margin: 1.8rem 0 0; padding: 0; }
.orte-liste li {
	background: var(--k-weiss);
	border: 1px solid var(--k-sand-tief);
	border-radius: 999px;
	padding: 0.45rem 1.1rem;
	font-size: 0.92rem;
	font-weight: 600;
}

/* ---------------------------------------------------------------- Kontakt */

.kontakt__spalten {
	display: grid;
	grid-template-columns: 1fr 1.2fr;
	gap: 3rem;
	align-items: start;
}
@media (max-width: 860px) { .kontakt__spalten { grid-template-columns: 1fr; } }

.kontakt__daten { list-style: none; margin: 1.5rem 0 0; padding: 0; display: grid; gap: 0.7rem; }
.kontakt__daten a { color: var(--k-signal); font-weight: 700; text-decoration: none; }
.kontakt__daten a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------- Footer */

.site-footer {
	background: var(--k-anthrazit-tief);
	color: rgba(247, 245, 241, 0.75);
	font-size: var(--k-fs-klein);
	padding-block: 2.5rem;
}

.site-footer__zeile {
	display: flex;
	flex-wrap: wrap;
	gap: 1.5rem;
	justify-content: space-between;
	align-items: center;
}

.footermenue { display: flex; gap: 1.4rem; list-style: none; margin: 0; padding: 0; }
.footermenue a { text-decoration: none; }
.footermenue a:hover { color: var(--k-signal); }