:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --border:#e5e7eb;
  --text:#0f172a;
  --muted:#475569;
  --bg-alt:#f8fafc;
  --radius:14px;
}

/* Basics */
*,
*::before,
*::after{
  box-sizing:border-box;
}
html,body{
  margin:0;
  padding:0;
}
body{
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:#ffffff;
  line-height:1.6;
}
a{
  color:var(--primary);
  text-decoration:none;
}
a:hover{
  text-decoration:none;
}
img{
  max-width:100%;
  display:block;
  border-radius:var(--radius);
}
.container{
  width:min(100% - 32px,1100px);
  margin-inline:auto;
}
.section{
  padding:60px 0;
}
.section.alt{
  background:var(--bg-alt);
}
h1,h2,h3{
  line-height:1.2;
  margin:0 0 .6em;
}
h2{
  text-align:center;
  margin-bottom:1em;
}
.section-note{
  text-align:center;
  color:var(--muted);
  margin:-10px 0 18px;
}

/* Header / Nav */
.site-header{
  background:#fff;
  border-bottom:1px solid var(--border);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 0;
  position:relative;
}
.logo img{
  height:60px;
  width:auto;
}
.main-nav{
  display:flex;
  gap:16px;
}
.main-nav a{
  font-weight:500;
  color:var(--text);
}
.main-nav a:hover{
  color:var(--primary);
}

/* Hamburger Button (mobil) */
.nav-toggle{
  display:none;
  background:none;
  border:none;
  width:40px;
  height:40px;
  border-radius:999px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
  padding:0;
}
.nav-toggle span{
  display:block;
  width:22px;
  height:2px;
  border-radius:999px;
  background:var(--text);
}

/* Buttons */
.btn{
  border:1px solid var(--border);
  padding:12px 16px;
  border-radius:var(--radius);
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:700;
}
.btn-primary{
  background:var(--primary);
  color:#fff !important;
  border-color:transparent;
}
.btn-primary:hover{
  background:var(--primary-dark);
}

/* Hero */
.hero{
  padding:60px 0;
  background:radial-gradient(circle at 80% -20%,#e0ecff 0%,transparent 70%);
  text-align:center;
}
.hero-inner h1{
  font-size:clamp(2rem,3vw,2.6rem);
}
.hero-inner p{
  color:var(--muted);
  margin-bottom:1em;
}

/* Leistungen */
.grid{
  display:grid;
  gap:24px;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
}
.card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:20px;
  text-align:center;
  box-shadow:0 6px 18px rgba(15,23,42,0.04);
}
.card h3{
  margin-bottom:.4em;
}
.card p{
  margin:0;
  color:var(--muted);
}

/* Videos */
.video-strip{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:18px;
  margin-top:22px;
}
.video-wrapper{
  width:300px;
  aspect-ratio:16/9;
  border-radius:var(--radius);
  overflow:hidden;
  cursor:pointer;
  box-shadow:0 4px 10px rgba(15,23,42,0.08);
  background:#000;
}
.video-preview{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:0;
}

/* Lightbox (Videos & Zertifikate) */
.lightbox{
  position:fixed;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  z-index:300;
}
.lightbox.is-open{
  display:flex;
}
.lightbox-backdrop{
  position:absolute;
  inset:0;
  background:rgba(0,0,0,0.7);
}
.lightbox-inner{
  position:relative;
  max-width:900px;
  width:90%;
  max-height:90vh;
  border-radius:var(--radius);
  overflow:hidden;
  background:#000;
}
.lightbox-inner video,
.lightbox-inner img{
  width:100%;
  max-height:90vh;
  object-fit:contain;
}
.lightbox-close{
  position:absolute;
  top:8px;
  right:12px;
  border:none;
  background:rgba(0,0,0,0.7);
  color:#fff;
  font-size:24px;
  width:36px;
  height:36px;
  border-radius:50%;
  cursor:pointer;
}

/* Geschäftsführer */
.about{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  align-items:center;
  gap:24px;
}
@media(max-width:800px){
  .about{
    grid-template-columns:1fr;
    text-align:center;
  }
}

/* Zertifikate */
.cert-grid{
  display:flex;
  justify-content:center;
  gap:40px;
  flex-wrap:wrap;
  margin-top:16px;
}
.cert-item{
  background:none;
  border:none;
  cursor:pointer;
  text-align:center;
}
.cert-item img{
  max-height:210px;
  box-shadow:0 4px 10px rgba(15,23,42,0.1);
  border-radius:10px;
}
.cert-item span{
  color:var(--muted);
  font-size:14px;
  margin-top:6px;
  display:block;
}

/* Bewertungen */
.reviews{
  padding:60px 0;
}
.review{
  max-width:720px;
  margin:0 auto 20px;
  padding:18px;
  border-radius:var(--radius);
  border:1px solid var(--border);
  background:#fff;
  box-shadow:0 6px 18px rgba(15,23,42,0.04);
  transition:.15s;
}
.review:hover{
  transform:translateY(-3px);
  border-color:var(--primary);
  box-shadow:0 12px 30px rgba(37,99,235,.18);
}

/* Kontaktinfos oben nebeneinander */
.contact-top-row{
  display:flex;
  justify-content:center;
  gap:40px;
  flex-wrap:wrap;
  margin:40px 0 30px;
}
.contact-box{
  min-width:180px;
  text-align:center;
}
.contact-label{
  display:block;
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--muted);
  margin-bottom:4px;
}

/* Kontaktformular (zentriert) */
.contact-form{
  max-width:720px;
  margin:0 auto;
  display:grid;
  gap:16px;
}
.contact-form .row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
@media(max-width:700px){
  .contact-form .row{
    grid-template-columns:1fr;
  }
}
.contact-form label{
  display:block;
  margin-bottom:4px;
  font-size:14px;
  font-weight:500;
}
.contact-form input,
.contact-form select,
.contact-form textarea{
  width:100%;
  padding:12px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  font:inherit;
}

/* Karte */
.map-wrapper{
  max-width:800px;
  margin:40px auto 0;
  text-align:center;
}
.map-container{
  position:relative;
  padding-bottom:56.25%;
  height:0;
  border-radius:var(--radius);
  overflow:hidden;
}
.map-container iframe{
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:100%;
  border:0;
}
.map-text{
  margin-top:14px;
  color:var(--muted);
  font-size:14px;
}

/* Footer */
.footer{
  border-top:1px solid var(--border);
  padding:24px 0;
  font-size:14px;
  color:var(--muted);
  background:#fff;
}
.footer-inner{
  display:flex;
  flex-direction:column;
  gap:8px;
  align-items:center;
  text-align:center;
}
.footer-top{
  display:flex;
  gap:16px;
}
.footer-top a{
  text-decoration:none;
}
.footer-top a:hover{
  text-decoration:underline;
}
.footer-contact p{
  margin:0;
}

/* WhatsApp Button */
.whatsapp-btn{
  position:fixed;
  right:20px;
  bottom:20px;
  width:60px;
  height:60px;
  border-radius:50%;
  background:#25D366;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 10px 25px rgba(0,0,0,0.25);
  z-index:500;
}
.whatsapp-btn:hover{
  background:#1ebe5d;
}
.wa-icon{
  width:32px;
  height:32px;
  display:block;
}

/* ---------- SPEZIELL: Zertifikats-Lightbox ohne schwarze Ränder ---------- */
#cert-lightbox .lightbox-backdrop{
  background:rgba(255,255,255,0.98);
}
#cert-lightbox .lightbox-inner{
  background:transparent;
  box-shadow:none;
}
#cert-lightbox .lightbox-inner img{
  border-radius:0;
  background:transparent;
}

/* ---------- MOBILE NAVIGATION ---------- */
@media(max-width:800px){
  .main-nav{
    position:absolute;
    right:16px;
    left:16px;
    top:68px;
    background:#fff;
    border-radius:var(--radius);
    border:1px solid var(--border);
    padding:10px 14px 12px;
    flex-direction:column;
    gap:8px;
    box-shadow:0 10px 25px rgba(15,23,42,0.12);
    display:none;
    z-index:200;
  }
  .site-header.nav-open .main-nav{
    display:flex;
  }
  .nav-toggle{
    display:flex;
  }
}