:root{
  --bg:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --primary:#0b72d9;
  --accent:#ff6600;
  --surface:#f6f7fb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;color:var(--text);background:var(--bg)}
.container{max-width:1140px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid #eee;z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800}
.brand .logo{width:36px;height:36px;border-radius:6px;background-image:url('assets/logo_waermebau24.png');background-size:contain;background-repeat:no-repeat;background-position:center;background-color:transparent}
nav a{color:var(--text);text-decoration:none;margin-left:18px;font-weight:600}
.hero{position:relative;background:var(--surface)}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center;padding:48px 0}
.hero h1{font-size:40px;line-height:1.1;margin:0 0 12px}
.hero p{color:var(--muted);margin:0 0 10px}
.tag{display:inline-block;margin:6px 0 18px;padding:6px 10px;border-radius:999px;background:#ffe9dc;color:#8a3b00;font-weight:700;font-size:12px}
.cta{display:inline-block;background:var(--accent);color:#fff;padding:12px 16px;border-radius:10px;text-decoration:none;font-weight:700}
.hero img{width:100%;height:auto;border-radius:16px;box-shadow:0 6px 28px rgba(0,0,0,.12)}
.section{padding:56px 0}
.section h2{font-size:28px;margin:0 0 16px}
.grid{display:grid;gap:20px}
.grid.cards{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid #ececec;border-radius:16px;overflow:hidden;display:flex;flex-direction:column}
.card img{width:100%;height:180px;object-fit:cover}
.card .body{padding:14px 14px 18px}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:14px}
.about{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.about .box{background:#fff;border:1px solid #eee;border-radius:16px;padding:20px}
.kontakt{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.kontakt .box{background:#fff;border:1px solid #eee;border-radius:16px;padding:20px}
footer{padding:28px 0;border-top:1px solid #eee;color:var(--muted);margin-top:24px}
small, .muted{color:var(--muted)}
ul{margin:0 0 0 18px}
@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr}
  .grid.cards{grid-template-columns:1fr 1fr}
  .about,.kontakt{grid-template-columns:1fr}
}