:root{
  --ink:#14202e; --ink-soft:#4a5663; --line:#dfe3e8; --bg:#ffffff; --bg-alt:#f2f4f7;
  --accent:#132e4b; --accent-dark:#0b1f35; --dark:#132e4b; --silver:#a6a8ab; --steel:#5d7590;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px}
img{max-width:100%;display:block}
a{color:var(--accent-dark)}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}

/* Kopfzeile */
.topbar{background:var(--accent-dark);color:#d9dee5;font-size:14px}
.topbar .wrap{display:flex;gap:24px;justify-content:flex-end;padding-top:8px;padding-bottom:8px;flex-wrap:wrap}
.topbar a{color:#d9d6cf;text-decoration:none}
.topbar a:hover{color:#fff}
header.nav{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--line)}
header.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:78px}
.logo img{height:52px;width:auto}
.logo-text{font-weight:700;font-size:22px;letter-spacing:.04em;color:var(--ink);text-decoration:none}
nav ul{list-style:none;display:flex;gap:28px}
nav a{color:var(--ink);text-decoration:none;font-size:14px;font-weight:600;letter-spacing:.1em;text-transform:uppercase}
nav a:hover{color:var(--accent)}
.menu-btn{display:none;background:none;border:0;font-size:28px;cursor:pointer;color:var(--ink)}

/* Titelbild */
.hero{position:relative;min-height:540px;display:flex;align-items:flex-end;color:#fff;background:#2b3238 center/cover no-repeat}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,31,53,.05) 0%,rgba(11,31,53,.35) 45%,rgba(11,31,53,.85) 100%)}
.hero .wrap{position:relative;padding-bottom:70px;width:100%}
.hero .kicker{font-size:14px;font-weight:700;letter-spacing:.25em;text-transform:uppercase;color:var(--silver);margin-bottom:12px}
.hero h1{font-size:clamp(34px,6vw,62px);line-height:1.1;font-weight:700;max-width:760px}
.hero p{margin-top:16px;font-size:19px;max-width:560px;color:#eceae6}

/* Abschnitte */
section{padding:88px 0}
section.alt{background:var(--bg-alt)}
.eyebrow{font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--steel);font-weight:700;margin-bottom:10px}
h2{font-size:clamp(28px,4vw,40px);line-height:1.2;margin-bottom:24px}
h3{font-size:21px;margin-bottom:12px}
p+p{margin-top:14px}
.lead{font-size:19px;color:var(--ink-soft)}

.split{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.split img{border-radius:4px;width:100%;object-fit:cover}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:40px}
.card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--accent);padding:30px 28px}
.card ul{list-style:none}
.card li{padding:7px 0;border-bottom:1px solid var(--line);font-size:16px}
.card li:last-child{border-bottom:0}

.weiteres{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:40px;align-items:start}
details{background:#fff;border:1px solid var(--line);padding:22px 26px}
details summary{cursor:pointer;font-weight:700;font-size:19px;list-style:none;display:flex;justify-content:space-between}
details summary::after{content:"+";color:var(--steel);font-size:24px;line-height:1}
details[open] summary::after{content:"–"}
details p{margin-top:14px;color:var(--ink-soft);font-size:16px}
details ul{margin:10px 0 0 18px;color:var(--ink-soft);font-size:16px}

.bereiche{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.bereiche img{width:100%;height:auto;border-radius:3px}
.bereiche{max-width:900px}

.galerie{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:40px}
.galerie a{display:block;overflow:hidden;border-radius:3px}
.galerie img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s}
.galerie a:hover img{transform:scale(1.04)}
.galerie.gross{grid-template-columns:repeat(6,1fr)}
.galerie.gross a{grid-column:span 2}
.galerie.gross a.breit{grid-column:span 3}
.galerie-titel{margin-top:56px;font-size:15px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft)}
.galerie-titel+.galerie{margin-top:16px}
.lightbox{position:fixed;inset:0;background:rgba(8,16,28,.94);display:none;align-items:center;justify-content:center;z-index:50;padding:20px}
.lightbox.offen{display:flex}
.lightbox img{max-width:100%;max-height:88vh;box-shadow:0 10px 40px rgba(0,0,0,.5)}
.lightbox button{position:absolute;background:none;border:0;color:#fff;font-size:44px;cursor:pointer;padding:10px 18px;line-height:1}
.lb-zu{top:10px;right:10px}.lb-vor{right:6px;top:50%;transform:translateY(-50%)}.lb-zurueck{left:6px;top:50%;transform:translateY(-50%)}
.sv-bild{border-radius:4px;box-shadow:0 12px 40px rgba(19,46,75,.18)}
.fachgebiete{list-style:none;margin-top:18px}
.fachgebiete li{padding:9px 0 9px 26px;border-bottom:1px solid var(--line);position:relative}
.fachgebiete li::before{content:"";position:absolute;left:0;top:17px;width:12px;height:2px;background:var(--steel)}
.footer-logo{height:40px;width:auto;margin-bottom:10px}

.partner{display:flex;align-items:center;gap:30px;flex-wrap:wrap}
.partner-karte{display:flex;align-items:center;gap:18px;background:#fff;border:1px solid var(--line);padding:16px 26px 16px 18px;text-decoration:none;color:var(--ink);border-radius:3px}
.partner-karte:hover{border-color:var(--steel)}
.partner-karte img{height:62px;width:auto}
.partner-karte strong{display:block;font-size:19px}
.partner-karte small{color:var(--ink-soft);font-size:14px}

/* Kontakt */
.kontakt-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px}
.kontakt-box{background:var(--dark);color:#eceae6;padding:40px}
.kontakt-box a{color:#fff;text-decoration:none}
.kontakt-box dt{font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--silver);margin-top:20px}
.kontakt-box dt:first-child{margin-top:0}
.kontakt-box dd{font-size:19px}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:14px 28px;text-decoration:none;font-weight:600;border-radius:3px;margin:8px 10px 0 0}
.btn:hover{background:var(--accent-dark)}
.btn.ghost{background:transparent;border:2px solid var(--accent);color:var(--accent-dark)}

/* Fußzeile */
footer{background:var(--dark);color:#b9b5ad;padding:40px 0;font-size:14px}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer a{color:#d9d6cf;text-decoration:none;margin-left:22px}
footer a:hover{color:#fff}

/* Rechtstexte */
.legal{max-width:820px}
.legal h1{font-size:34px;margin-bottom:28px}
.legal h2{font-size:22px;margin:36px 0 12px}
.legal ul,.legal ol{margin:10px 0 10px 22px}
.legal li{margin:6px 0}

@media (max-width:860px){
  .galerie.gross{grid-template-columns:1fr 1fr}
  .galerie.gross a,.galerie.gross a.breit{grid-column:span 1}
  .galerie.gross a.breit:first-child{grid-column:span 2}
  .split,.kontakt-grid,.weiteres{grid-template-columns:1fr;gap:34px}
  .cards{grid-template-columns:1fr}
  .bereiche{grid-template-columns:repeat(3,1fr);gap:8px}
  .galerie{grid-template-columns:repeat(2,1fr)}
  section{padding:60px 0}
  .menu-btn{display:block}
  nav ul{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line)}
  nav ul.open{display:flex}
  nav li a{display:block;padding:16px 20px;border-top:1px solid var(--line)}
  .hero{min-height:420px;background-position:35% center}
  .topbar .wrap{justify-content:center;gap:14px}
  footer a{margin:0 18px 0 0}
}