/* Elektrotechnik Osterholzer – Stylesheet
   Keine externen Schriften oder Dienste (Datenschutz). */

:root {
	--blau: #1f3a8a;
	--blau-dunkel: #172a63;
	--tuerkis: #0ea5c6;
	--gelb: #facc15;
	--text: #1e293b;
	--text-leise: #475569;
	--hinter: #f6f8fb;
	--karte: #ffffff;
	--rand: #e2e8f0;
	--hero-von: #c9eadf;
	--hero-bis: #0b8fd1;
	--schatten: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
}

@media (prefers-color-scheme: dark) {
	:root {
		--blau: #93b4ff;
		--blau-dunkel: #c7d7ff;
		--tuerkis: #38bdf8;
		--text: #e2e8f0;
		--text-leise: #a3b1c6;
		--hinter: #0b1220;
		--karte: #131c2e;
		--rand: #24314a;
		--hero-von: #0f2d3a;
		--hero-bis: #0a3a66;
		--schatten: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
	}
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
	margin: 0;
	font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
	font-size: 17px;
	line-height: 1.6;
	color: var(--text);
	background: var(--hinter);
}

a { color: var(--blau); }
a:hover { color: var(--tuerkis); }

.innen { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Kopfzeile */
.kopf {
	position: sticky; top: 0; z-index: 10;
	background: color-mix(in srgb, var(--karte) 88%, transparent);
	backdrop-filter: blur(8px);
	border-bottom: 1px solid var(--rand);
}
.kopf .innen { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; }
.marke { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 700; letter-spacing: .02em; }
.marke svg { flex: none; }
.marke:hover { color: var(--text); }
.kopf nav { display: flex; gap: 20px; }
.kopf nav a { text-decoration: none; color: var(--text-leise); font-weight: 500; }
.kopf nav a:hover { color: var(--blau); }

/* Startbereich */
.hero {
	background: linear-gradient(180deg, var(--hero-von) 0%, var(--hero-bis) 100%);
	color: #0b1f4d;
	padding: 72px 0 80px;
	overflow: hidden;
}
@media (prefers-color-scheme: dark) { .hero { color: #e8f1ff; } }
.hero .innen { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; }
.hero h1 {
	margin: 0 0 8px;
	font-size: clamp(2.1rem, 5.5vw, 3.6rem);
	line-height: 1.05;
	font-weight: 800;
	letter-spacing: .01em;
	text-transform: uppercase;
}
.hero h1 span { display: block; }
.siegel {
	display: inline-block; margin: 0 0 16px;
	padding: 4px 12px; border-radius: 999px;
	background: rgba(255, 255, 255, .7); color: #172a63;
	font-size: .85rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
}
@media (prefers-color-scheme: dark) { .siegel { background: rgba(250, 204, 21, .15); color: #fde047; } }
.hero .unterzeile { font-size: 1.2rem; margin: 18px 0 28px; max-width: 34ch; opacity: .9; }
.knoepfe { display: flex; flex-wrap: wrap; gap: 12px; }
.knopf {
	display: inline-flex; align-items: center; gap: 8px;
	padding: 12px 20px; border-radius: 10px;
	font-weight: 600; text-decoration: none;
	transition: transform .15s ease, box-shadow .15s ease;
}
.knopf:hover { transform: translateY(-1px); }
.knopf.voll { background: var(--blau-dunkel); color: #fff; box-shadow: 0 6px 18px rgba(23, 42, 99, .3); }
.knopf.voll:hover { color: #fff; }
.knopf.leer { background: rgba(255, 255, 255, .75); color: #172a63; }
.knopf.leer:hover { color: #172a63; }
@media (prefers-color-scheme: dark) {
	.knopf.voll { background: var(--gelb); color: #1a1a1a; }
	.knopf.voll:hover { color: #1a1a1a; }
	.knopf.leer { background: rgba(255, 255, 255, .12); color: #e8f1ff; }
	.knopf.leer:hover { color: #e8f1ff; }
}
/* Männchen vor einer hellen Scheibe (auch im Dunkelmodus gut sichtbar) */
.figur { justify-self: center; position: relative; height: 360px; aspect-ratio: 224 / 528; }
.figur::before {
	content: ""; position: absolute; z-index: 0;
	width: 320px; height: 320px; left: 50%; top: 50%; transform: translate(-50%, -46%);
	border-radius: 50%;
	background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, .9), rgba(255, 255, 255, .45) 70%);
	box-shadow: 0 18px 40px rgba(0, 0, 0, .15);
}
.figur img { position: relative; z-index: 1; display: block; width: 100%; height: 100%; }

/* Abschnitte */
section { padding: 72px 0; }
section h2 { font-size: 1.9rem; margin: 0 0 8px; line-height: 1.2; }
.einleitung { color: var(--text-leise); margin: 0 0 36px; max-width: 60ch; }

.raster { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.kachel {
	background: var(--karte);
	border: 1px solid var(--rand);
	border-radius: 14px;
	padding: 24px;
	box-shadow: var(--schatten);
}
.kachel h3 { margin: 14px 0 6px; font-size: 1.1rem; }
.kachel p { margin: 0; color: var(--text-leise); font-size: .97rem; }
.symbol {
	width: 44px; height: 44px; border-radius: 10px;
	display: grid; place-items: center;
	background: color-mix(in srgb, var(--tuerkis) 15%, transparent);
	color: var(--blau);
}

.streifen { background: var(--karte); border-top: 1px solid var(--rand); border-bottom: 1px solid var(--rand); }

/* Kontakt */
#kontakt dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 10px 20px; }
#kontakt dt { color: var(--text-leise); }
#kontakt dd { margin: 0; font-weight: 600; }

/* Fußzeile */
.fuss { padding: 28px 0; color: var(--text-leise); font-size: .9rem; }
.fuss .innen { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.fuss a { color: var(--text-leise); }

/* Textseiten (Impressum, Datenschutz) */
.text { max-width: 760px; padding-top: 48px; padding-bottom: 72px; }
.text h1 { font-size: 2rem; margin: 0 0 24px; }
.text h2 { font-size: 1.25rem; margin: 32px 0 8px; }
.text p, .text li { color: var(--text); }
/* feste Spaltenbreite, damit alle Listen einer Seite untereinander fluchten */
.angaben { margin: 0; display: grid; grid-template-columns: 10.5rem 1fr; gap: 14px 24px; }
.angaben dt { color: var(--text-leise); }
.angaben dd { margin: 0; }
@media (max-width: 560px) {
	.angaben { grid-template-columns: 1fr; gap: 2px; }
	.angaben dd { margin-bottom: 14px; }
}
.hinweis {
	border-left: 4px solid var(--gelb);
	background: color-mix(in srgb, var(--gelb) 12%, transparent);
	padding: 12px 16px; border-radius: 6px; margin: 0 0 24px;
}
mark { background: color-mix(in srgb, var(--gelb) 45%, transparent); color: inherit; padding: 0 3px; border-radius: 3px; }

/* Handy / Tablet */
@media (max-width: 860px) {
	.raster { grid-template-columns: 1fr 1fr; }
	.hero .innen { grid-template-columns: 1fr; }
	.figur { height: 260px; margin-top: 8px; }
	.figur::before { width: 230px; height: 230px; }
}
@media (max-width: 560px) {
	body { font-size: 16px; }
	.innen { padding: 0 16px; }
	.raster { grid-template-columns: 1fr; }
	.kopf nav { gap: 14px; font-size: .95rem; }
	.kopf nav .breit { display: none; }
	.hero { padding: 48px 0 56px; }
	.siegel { font-size: .74rem; letter-spacing: .02em; padding: 4px 10px; }
	section { padding: 52px 0; }
	.knopf { flex: 1 1 100%; justify-content: center; }
}