:root{
  --primary:#0f2f24;
  --secondary:#1f5a46;
  --accent:#2f8f6b;
  --white:#fff;
  --bg:#f6fbf8;
  --muted:#667085;
  --border:rgba(15,47,36,.12);
  --shadow:0 24px 60px rgba(0,0,0,.10);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Poppins',Arial,sans-serif;background:var(--white);color:var(--primary);line-height:1.7}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:auto;padding:0 20px}
section{padding:96px 0}
h1,h2,h3{letter-spacing:-.02em}
h2{font-size:clamp(2rem,4vw,2.75rem);line-height:1.15;text-align:center;margin-bottom:16px}
p{color:var(--muted)}
.lead{max-width:880px;margin:0 auto 44px;text-align:center;font-weight:600}
.btn,.btn-secondary,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 24px;border-radius:999px;font-weight:800;transition:.25s ease;
}
.btn{background:var(--accent);color:#fff;box-shadow:0 16px 36px rgba(47,143,107,.34)}
.btn:hover,.btn-secondary:hover,.btn-ghost:hover{transform:translateY(-3px)}
.btn-secondary{background:rgba(15,47,36,.05);border:1px solid rgba(15,47,36,.12);color:var(--secondary)}
.btn-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);color:#fff;backdrop-filter:blur(10px)}
.actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.tag{display:inline-flex;align-items:center;gap:9px;padding:10px 14px;border-radius:999px;background:rgba(47,143,107,.10);border:1px solid rgba(47,143,107,.18);color:var(--secondary);font-weight:800;font-size:.92rem}
.dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px rgba(47,143,107,.14)}

nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(15,47,36,.88);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.10)}
.nav-container{max-width:1200px;margin:auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand-wrap{display:flex;flex-direction:column;line-height:1.1;gap:4px}
.brand{color:#fff;font-weight:800;font-size:1.05rem}
.slogan{color:rgba(229,231,235,.96);font-size:.82rem;font-weight:600}
.nav-links{display:flex;justify-content:flex-end;align-items:center;flex-wrap:wrap;gap:22px}
.nav-links a{color:#fff;font-weight:600;position:relative}
.nav-links a:after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--accent);transition:.25s}
.nav-links a:hover:after,.nav-links a.active:after{width:100%}

.hero{
  min-height:100vh;display:flex;align-items:center;color:#fff;
  background:
  radial-gradient(900px 500px at 15% 10%,rgba(47,143,107,.30),transparent 60%),
  linear-gradient(rgba(15,47,36,.76),rgba(15,47,36,.84)),
  url('bilder/steildach-dachfenster-selm.jpg');
  background-size:cover;background-position:center;
}
.hero-inner{max-width:900px}
.hero h1{font-size:clamp(2.7rem,5vw,4.4rem);line-height:1.06;margin-bottom:18px}
.hero p{font-size:1.2rem;color:#e5e7eb;max-width:760px;margin-bottom:28px;font-weight:600}

.page-hero{
  padding:155px 0 90px;
  background:radial-gradient(900px 300px at 10% 0%,rgba(47,143,107,.18),transparent 60%),linear-gradient(180deg,#f4fbf7,#fff);
  border-bottom:1px solid rgba(15,47,36,.06)
}
.page-hero h1{font-size:clamp(2.25rem,4vw,3.35rem);line-height:1.1;margin-bottom:10px}
.page-hero p{max-width:880px;font-weight:600}

.card{background:#fff;border:1px solid var(--border);border-radius:28px;padding:34px 30px;box-shadow:var(--shadow);overflow:hidden;position:relative}
.grid-2{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:stretch}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feature,.small-box,.info-row{padding:16px;border-radius:18px;background:rgba(15,47,36,.04);border:1px solid rgba(15,47,36,.07)}
.feature strong,.small-box strong{display:block;color:var(--primary);margin-bottom:4px}
.icon{width:44px;height:44px;border-radius:15px;display:flex;align-items:center;justify-content:center;background:rgba(47,143,107,.12);border:1px solid rgba(47,143,107,.18);color:var(--secondary);font-weight:900;flex:0 0 44px}

.image-card{border-radius:28px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);position:relative;min-height:100%}
.image-card img{width:100%;height:100%;min-height:360px;object-fit:cover}
.image-card:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(15,47,36,.82))}
.image-caption{position:absolute;left:20px;right:20px;bottom:18px;color:#fff;z-index:2}
.image-caption strong{display:block;font-size:1.1rem}
.image-caption span{display:inline-flex;margin-bottom:8px;padding:7px 10px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.20);font-weight:800;font-size:.84rem}

.service-card h3{display:flex;align-items:center;gap:12px;color:var(--secondary);margin-bottom:10px}
.service-card .desc{font-weight:600;margin-bottom:14px}
.service-card ul{list-style:none;color:var(--muted);font-weight:600}
.service-card li{margin:6px 0}
.service-card li:before{content:"✔ ";color:var(--accent);font-weight:900}
.split-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}

.gallery-toolbar{display:flex;justify-content:space-between;align-items:flex-end;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.gallery-toolbar .hint{max-width:780px;font-weight:600}
.gallery{column-count:3;column-gap:18px}
.gallery-item{break-inside:avoid;margin:0 0 18px;border-radius:26px;overflow:hidden;position:relative;background:#0b1f17;border:1px solid var(--border);box-shadow:0 24px 60px rgba(0,0,0,.10);cursor:pointer;transition:.3s}
.gallery-item:hover{transform:translateY(-6px);box-shadow:0 30px 80px rgba(0,0,0,.14)}
.gallery-item img{width:100%;height:auto;transition:.5s}
.gallery-item:hover img{transform:scale(1.05)}
.gallery-item:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,47,36,0) 45%,rgba(15,47,36,.86) 100%)}
.gallery-cap{position:absolute;left:18px;right:18px;bottom:16px;z-index:2;display:flex;flex-direction:column;gap:10px}
.pill{display:inline-flex;width:max-content;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.20);color:#fff;font-weight:800;font-size:.85rem}
.cap{color:#fff;font-weight:800;font-size:1.02rem;text-shadow:0 6px 18px rgba(0,0,0,.35)}

.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.74);display:none;align-items:center;justify-content:center;padding:22px;z-index:2000}
.lightbox.open{display:flex}
.lightbox-inner{max-width:1120px;width:100%;border-radius:22px;overflow:hidden;background:#0b1f17;position:relative;border:1px solid rgba(255,255,255,.16)}
.lightbox-inner img{width:100%;max-height:78vh;object-fit:contain;background:#061812}
.lightbox-bar{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:14px 16px;color:#fff;background:rgba(15,47,36,.94)}
.lb-actions{display:flex;gap:10px}
.lb-btn,.nav-arrow{border:0;background:rgba(255,255,255,.12);color:#fff;cursor:pointer;font-weight:900}
.lb-btn{padding:10px 12px;border-radius:14px}
.nav-arrow{position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;border-radius:16px;display:flex;align-items:center;justify-content:center}
.nav-arrow.prev{left:14px}.nav-arrow.next{right:14px}

.info-list{display:grid;gap:14px;margin-top:18px}
.info-row{display:flex;gap:12px;align-items:flex-start}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:26px}
.contact-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.faq{display:grid;gap:16px;max-width:900px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--border);border-radius:22px;padding:18px}
.faq summary{cursor:pointer;font-weight:800;color:var(--primary);list-style:none}
.faq p{margin-top:10px;font-weight:600}

.cookie-banner{position:fixed;left:20px;right:20px;bottom:20px;z-index:3000;max-width:980px;margin:auto;display:none;background:#fff;border:1px solid rgba(15,47,36,.14);border-radius:24px;box-shadow:0 24px 70px rgba(0,0,0,.18);padding:22px}
.cookie-banner.show{display:block}
.cookie-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.cookie-btn{border:0;cursor:pointer;border-radius:999px;padding:12px 18px;font-weight:900;font-family:inherit}
.cookie-btn.accept{background:var(--accent);color:#fff}
.cookie-btn.necessary{background:rgba(15,47,36,.06);color:var(--secondary);border:1px solid rgba(15,47,36,.10)}
.cookie-small{font-size:.85rem;margin-top:10px;color:var(--muted)}

footer{background:var(--primary);color:#d1fae5;text-align:center;padding:60px 20px}
footer p{color:#d1fae5}
footer strong{color:#fff}
.footer-links{margin-top:10px;display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.footer-links a{color:#d1fae5;font-weight:900;text-decoration:underline;text-underline-offset:4px}

@keyframes slideIn{from{opacity:0;transform:translateX(60px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideOut{from{opacity:1;transform:translateX(0)}to{opacity:0;transform:translateX(-60px)}}
.slide-in{animation:slideIn .9s ease forwards}.slide-out{animation:slideOut .7s ease forwards}

@media(max-width:1100px){.gallery{column-count:2}.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:980px){.grid-2,.grid-3,.contact-grid,.split-list{grid-template-columns:1fr}.image-card img{min-height:280px}}
@media(max-width:760px){.gallery{column-count:1}.nav-links{gap:14px}.slogan{display:none}section{padding:76px 0}.page-hero{padding-top:140px}}