/* ============================================================
   Kammer Fensterbau – Stylesheet
   Farbwelt aus dem Logo: Cyan + Anthrazit
   ============================================================ */

:root{
  --cyan:#17b0e6;
  --cyan-dark:#0f8fc0;
  --ink:#1c2530;        /* Anthrazit */
  --ink-2:#2b3644;
  --grey:#5b6674;
  --grey-light:#8a95a3;
  --line:#e4e8ee;
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --white:#ffffff;
  --radius:14px;
  --radius-lg:22px;
  --shadow-sm:0 2px 8px rgba(28,37,48,.06);
  --shadow:0 12px 34px rgba(28,37,48,.10);
  --shadow-lg:0 24px 60px rgba(28,37,48,.18);
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:86px}
body{
  font-family:'Manrope',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-weight:700;font-size:.98rem;line-height:1;
  padding:15px 26px;border-radius:999px;cursor:pointer;border:2px solid transparent;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s,color .18s;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--cyan);color:#fff;box-shadow:0 10px 24px rgba(23,176,230,.35)}
.btn-primary:hover{background:var(--cyan-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(23,176,230,.45)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.section .btn-ghost{border-color:var(--line);color:var(--ink)}
.section .btn-ghost:hover{background:var(--bg-alt);border-color:var(--cyan)}
.btn-phone{background:var(--ink);color:#fff;padding:12px 20px}
.btn-phone:hover{background:var(--ink-2)}
.phone-icon{color:var(--cyan);font-size:1.1em}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:76px}
.brand-logo{height:38px;width:auto}
.main-nav{display:flex;gap:30px;margin-left:auto}
.main-nav a{
  font-weight:600;color:var(--ink-2);font-size:1rem;position:relative;padding:6px 0;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--cyan);
  transition:width .22s var(--ease);
}
.main-nav a:hover{color:var(--cyan-dark)}
.main-nav a:hover::after{width:100%}
.header-phone{margin-left:0}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:26px;height:3px;background:var(--ink);border-radius:2px;transition:.25s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:min(88vh,760px);display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.03)}
.hero-overlay{position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(20,28,38,.92) 0%,rgba(20,28,38,.72) 42%,rgba(20,28,38,.35) 100%);
}
.hero-content{position:relative;color:#fff;padding-top:60px;padding-bottom:60px;max-width:720px}
.hero-eyebrow{
  display:inline-block;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  font-size:.82rem;color:#bfeaf9;margin-bottom:18px;
  border-left:3px solid var(--cyan);padding-left:12px;
}
.hero h1{font-size:clamp(2.6rem,6vw,4.4rem);line-height:1.04;font-weight:800;letter-spacing:-.02em}
.hero h1 .accent{color:var(--cyan)}
.hero-lead{font-size:clamp(1.05rem,2vw,1.25rem);color:#dfe5ec;margin:22px 0 32px;max-width:600px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Trust bar ---------- */
.trust{background:var(--ink);color:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:30px 24px}
.trust-item{text-align:center;padding:8px}
.trust-item strong{display:block;font-size:1.35rem;color:var(--cyan);font-weight:800;line-height:1.2;overflow-wrap:break-word}
.trust-item span{display:block;color:#c3ccd6;font-size:.95rem;margin-top:4px}

/* ---------- Sections ---------- */
.section{padding:88px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:640px;margin:0 auto 52px;text-align:center}
.eyebrow{font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;color:var(--cyan-dark);margin-bottom:12px}
h2{font-size:clamp(1.9rem,3.6vw,2.7rem);font-weight:800;letter-spacing:-.02em;line-height:1.1}
.section-sub{color:var(--grey);font-size:1.08rem;margin-top:14px}

/* ---------- Cards ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px 26px;box-shadow:var(--shadow-sm);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card-icon{
  width:58px;height:58px;border-radius:16px;display:grid;place-items:center;
  font-size:1.7rem;background:linear-gradient(135deg,#e6f7fe,#d0eefb);margin-bottom:18px;
}
.card h3{font-size:1.2rem;font-weight:700;margin-bottom:10px}
.card p{color:var(--grey);font-size:.98rem}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.about-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow);width:100%;aspect-ratio:4/3;object-fit:cover}
.about-text .eyebrow{text-align:left}
.about-text h2{margin-bottom:18px}
.about-text p{color:var(--grey);margin-bottom:16px}
.about-text p strong{color:var(--ink)}
.check-list{list-style:none;margin-top:22px;display:grid;gap:12px}
.check-list li{position:relative;padding-left:34px;font-weight:600;color:var(--ink-2)}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:-1px;width:22px;height:22px;border-radius:50%;
  background:var(--cyan);color:#fff;font-size:.8rem;display:grid;place-items:center;font-weight:800;
}

/* ---------- Gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.gallery-item{
  border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:1;
  box-shadow:var(--shadow-sm);cursor:pointer;
}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.gallery-item::after{
  content:"+";position:absolute;inset:0;display:grid;place-items:center;color:#fff;font-size:2rem;font-weight:300;
  background:rgba(23,176,230,.0);opacity:0;transition:.3s var(--ease);
}
.gallery-item:hover img{transform:scale(1.08)}
.gallery-item:hover::after{background:rgba(15,143,192,.55);opacity:1}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px 28px;position:relative}
.step-num{
  width:52px;height:52px;border-radius:50%;background:var(--cyan);color:#fff;
  font-weight:800;font-size:1.4rem;display:grid;place-items:center;margin-bottom:18px;
  box-shadow:0 8px 20px rgba(23,176,230,.35);
}
.step h3{font-size:1.2rem;margin-bottom:8px}
.step p{color:var(--grey)}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:stretch}
.contact-info{display:grid;gap:26px;align-content:start}
.info-block h3{font-size:1rem;text-transform:uppercase;letter-spacing:.05em;color:var(--cyan-dark);margin-bottom:6px}
.info-block p{color:var(--ink-2);font-size:1.08rem}
.info-block a:hover{color:var(--cyan-dark)}
.muted{color:var(--grey-light);font-size:.95rem}
.contact-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:4px}
.contact-map{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);min-height:360px;position:relative;background:var(--bg-alt)}
.contact-map iframe{width:100%;height:100%;min-height:360px;border:0;display:block}
.map-link{position:absolute;bottom:12px;right:12px;background:#fff;color:var(--ink);font-weight:600;font-size:.85rem;padding:8px 14px;border-radius:999px;box-shadow:var(--shadow-sm)}
.map-link:hover{color:var(--cyan-dark)}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#c3ccd6}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding:60px 24px 44px}
.footer-logo{height:34px;filter:brightness(0) invert(1);margin-bottom:16px;opacity:.95}
.footer-brand p{font-size:.96rem;max-width:320px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:16px;font-weight:700}
.footer-col a{display:block;margin-bottom:10px;color:#c3ccd6;transition:color .18s}
.footer-col a:hover{color:var(--cyan)}
.footer-col p{margin-bottom:10px;font-size:.96rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0}
.footer-bottom p{font-size:.88rem;color:var(--grey-light);text-align:center}

/* ---------- Lightbox ---------- */
.lightbox{
  position:fixed;inset:0;z-index:100;background:rgba(15,20,27,.94);
  display:none;align-items:center;justify-content:center;padding:40px;
}
.lightbox.open{display:flex}
.lightbox img{max-width:90vw;max-height:86vh;border-radius:10px;box-shadow:var(--shadow-lg)}
.lb-close,.lb-prev,.lb-next{
  position:absolute;background:rgba(255,255,255,.12);border:0;color:#fff;cursor:pointer;
  width:52px;height:52px;border-radius:50%;font-size:1.4rem;display:grid;place-items:center;
  transition:background .18s;
}
.lb-close:hover,.lb-prev:hover,.lb-next:hover{background:var(--cyan)}
.lb-close{top:26px;right:26px;font-size:2rem}
.lb-prev{left:26px;top:50%;transform:translateY(-50%)}
.lb-next{right:26px;top:50%;transform:translateY(-50%)}

/* ---------- Rechtsseiten ---------- */
.legal{padding:56px 0 80px;background:var(--bg-alt);min-height:60vh}
.legal-inner{max-width:820px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:48px clamp(24px,5vw,56px);box-shadow:var(--shadow-sm)}
.back-link{display:inline-block;color:var(--cyan-dark);font-weight:600;margin-bottom:22px}
.back-link:hover{text-decoration:underline}
.legal-inner h1{font-size:clamp(1.9rem,4vw,2.6rem);font-weight:800;letter-spacing:-.02em;margin-bottom:24px}
.legal-inner h2{font-size:1.2rem;font-weight:700;margin:30px 0 8px;color:var(--ink)}
.legal-inner p{color:var(--grey);margin-bottom:12px}
.legal-inner p strong{color:var(--ink)}
.legal-inner a{color:var(--cyan-dark)}
.legal-inner a:hover{text-decoration:underline}
.legal-note{margin-top:34px;padding:16px 18px;background:var(--bg-alt);border-left:3px solid var(--cyan);border-radius:8px;font-size:.92rem}
.legal-footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.legal-footer a{color:var(--grey-light)}
.legal-footer a:hover{color:var(--cyan)}
.legal-footer p{margin:0;font-size:.88rem;color:var(--grey-light)}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(4,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .main-nav{
    position:fixed;inset:76px 0 auto 0;flex-direction:column;gap:0;background:#fff;
    border-bottom:1px solid var(--line);padding:10px 0;transform:translateY(-120%);
    transition:transform .3s var(--ease);box-shadow:var(--shadow);max-height:0;overflow:hidden;
  }
  .main-nav.open{transform:translateY(0);max-height:400px}
  .main-nav a{padding:14px 24px;border-bottom:1px solid var(--line)}
  .main-nav a::after{display:none}
  .header-phone{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:32px}
  .steps{grid-template-columns:1fr}
  .trust-grid{grid-template-columns:1fr 1fr;gap:18px}
  .section{padding:64px 0}
}
@media (max-width:520px){
  .cards{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
}