:root{--red:#d30613;--dark:#151515;--anth:#242424;--muted:#f4f4f4;--text:#202020;--white:#fff;--radius:18px;--shadow:0 18px 40px rgba(0,0,0,.18)}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:#fff;line-height:1.55} a{color:inherit} img{max-width:100%;display:block}.container{width:min(1180px,92%);margin:auto}.topbar{background:#111;color:white;font-size:.95rem}.topbar .container{display:flex;justify-content:space-between;gap:18px;padding:8px 0;flex-wrap:wrap}.topbar a{text-decoration:none}.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);box-shadow:0 2px 18px rgba(0,0,0,.08);backdrop-filter:blur(8px)}.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0}.logo{height:58px;width:auto}.menu{display:flex;gap:22px;align-items:center;font-weight:700}.menu a{text-decoration:none}.menu a:hover{color:var(--red)}.menu .cta{background:var(--red);color:white;padding:10px 14px;border-radius:999px}.mobile-toggle{display:none;border:0;background:var(--dark);color:white;border-radius:10px;padding:9px 12px;font-size:22px}.hero{min-height:690px;background:linear-gradient(90deg,rgba(0,0,0,.78),rgba(0,0,0,.38),rgba(0,0,0,.05)),url('images/hero-akustikdecke.jpg') center 8%/cover no-repeat;color:white;display:flex;align-items:center}.hero-card{max-width:760px;padding:64px 0}.eyebrow{color:#fff;background:rgba(211,6,19,.92);display:inline-block;padding:8px 13px;border-radius:999px;font-weight:700;margin-bottom:18px}.hero h1{font-size:clamp(2.3rem,5vw,4.8rem);line-height:1.02;margin:0 0 18px}.hero p{font-size:clamp(1.1rem,2vw,1.35rem);max-width:680px;margin:0 0 26px}.buttons{display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;border-radius:999px;padding:13px 20px;font-weight:800;border:2px solid transparent}.btn-red{background:var(--red);color:white}.btn-light{background:white;color:var(--dark)}.btn-outline{border-color:white;color:white}.trust{background:#fff;margin-top:-48px;position:relative;z-index:5}.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.trust-item{background:white;border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;font-weight:800}.trust-item span{display:block;color:var(--red);font-size:1.7rem}.trust-item .gold-stars{color:#f5b301;letter-spacing:1px;font-size:1.45rem;line-height:1.1;margin-bottom:4px;text-shadow:0 1px 0 rgba(0,0,0,.08)}.section{padding:82px 0}.section.alt{background:var(--muted)}.section-title{max-width:780px;margin:0 auto 42px;text-align:center}.section-title h2{font-size:clamp(2rem,3vw,3rem);margin:0 0 10px}.section-title p{font-size:1.08rem;color:#555}.services{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.service{background:white;border-radius:var(--radius);padding:28px;box-shadow:0 10px 28px rgba(0,0,0,.08);border-top:5px solid var(--red)}.service h3{margin:0 0 10px;font-size:1.35rem}.service ul{padding-left:18px;margin:14px 0 0}.about{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}.about-card{background:var(--dark);color:white;border-radius:var(--radius);padding:34px}.facts{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px}.fact{background:#fff;border-radius:var(--radius);padding:22px;box-shadow:0 10px 30px rgba(0,0,0,.08)}.fact b{color:var(--red);font-size:1.4rem}.refs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.ref{position:relative;border:0;border-radius:var(--radius);overflow:hidden;padding:0;cursor:pointer;background:#111;box-shadow:var(--shadow);text-align:left}.ref img{width:100%;height:245px;object-fit:cover;transition:.3s transform}.ref:hover img{transform:scale(1.05)}.ref div{position:absolute;inset:auto 0 0;padding:48px 20px 20px;background:linear-gradient(transparent,rgba(0,0,0,.86));color:white}.ref h3{margin:0;font-size:1.45rem}.ref p{margin:4px 0 0;color:#ddd}.reviews{display:grid;grid-template-columns:1fr 1fr;gap:22px}.review{background:white;border-radius:var(--radius);padding:30px;box-shadow:0 10px 28px rgba(0,0,0,.08)}.stars{color:var(--red);font-size:1.3rem;letter-spacing:2px}.contact{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px}.contact-card{background:var(--dark);color:white;border-radius:var(--radius);padding:32px}.contact-card a{color:white}.form{background:white;border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.form label{display:block;font-weight:700;margin-top:12px}.form input,.form textarea{width:100%;padding:12px 13px;border:1px solid #ccc;border-radius:10px;margin-top:5px;font:inherit}.form textarea{min-height:130px}.footer{background:#111;color:white;padding:34px 0}.footer .container{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer a{color:white;text-decoration:none}.legal{max-width:900px;margin:auto;padding:70px 0}.legal h1{font-size:2.6rem}.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.92);z-index:999;display:none;overflow:auto;padding:24px}.lightbox.active{display:block}.lightbox-head{display:flex;justify-content:space-between;align-items:center;color:white;margin:0 auto 22px;width:min(1180px,94%)}.lightbox-close{border:0;background:var(--red);color:white;font-size:28px;border-radius:12px;padding:8px 15px;cursor:pointer}.lightbox-grid{width:min(1180px,94%);margin:auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.lightbox-grid img{width:100%;height:260px;object-fit:cover;border-radius:14px;background:#333;cursor:pointer}.image-view{position:fixed;inset:0;background:rgba(0,0,0,.96);z-index:1000;display:none;align-items:center;justify-content:center;padding:20px}.image-view.active{display:flex}.image-view img{max-height:90vh;max-width:92vw;border-radius:12px}.image-view button{position:fixed;top:18px;right:26px;border:0;background:var(--red);color:white;font-size:30px;border-radius:12px;padding:8px 15px;cursor:pointer}
@media (max-width:850px){.mobile-toggle{display:block}.menu{position:absolute;left:0;right:0;top:86px;background:white;display:none;flex-direction:column;padding:20px;box-shadow:0 14px 30px rgba(0,0,0,.16)}.menu.open{display:flex}.hero{min-height:620px;background-position:center top}.trust-grid,.services,.refs,.reviews,.about,.contact{grid-template-columns:1fr}.trust{margin-top:0}.topbar .container{font-size:.88rem}.footer .container{display:block}.ref img{height:220px}.logo{height:48px}}


.project-card{border:0;background:#fff;color:#111;border-radius:18px;overflow:hidden;text-align:left;cursor:pointer;box-shadow:0 12px 34px rgba(0,0,0,.35);display:flex;flex-direction:column;min-height:100%}.project-card img{width:100%;height:245px;object-fit:cover}.project-content{padding:22px}.project-content h3{font-size:1.35rem;margin:8px 0}.project-content p{color:#444;margin:0 0 10px}.project-content ul{margin:12px 0 14px;padding-left:18px;color:#333}.project-content strong{color:var(--red)}.project-year{display:inline-block;background:var(--red);color:white;border-radius:999px;padding:5px 10px;font-weight:800;font-size:.9rem}.project-detail{grid-column:1/-1;background:#fff;border-radius:18px;padding:26px;box-shadow:0 12px 34px rgba(0,0,0,.25)}.project-detail h3{margin:0 0 10px;font-size:1.45rem}.project-detail p{margin:0 0 14px;color:#333}.project-detail ul{columns:2;margin:0;padding-left:20px}.lightbox-grid .project-card img{cursor:pointer}.lightbox-grid .project-detail+img{margin-top:0}@media(max-width:680px){.project-detail ul{columns:1}.project-card img{height:210px}}


.social-float{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:10px;z-index:9999}
.social-float .sf{padding:10px 14px;border-radius:999px;color:#fff;text-decoration:none;font-weight:700;box-shadow:0 4px 10px rgba(0,0,0,.2)}
.sf.whatsapp{background:#25D366}
.sf.instagram{background:#E1306C}
.sf.facebook{background:#1877F2}