:root{
    --bg:#181C1D;
    --bg-alt:#1F2426;
    --card:#22282A;
    --line:#33393B;
    --text:#ECE8E0;
    --text-dim:#9BA3A4;
    --copper:#C96A34;
    --copper-dim:#8C4A25;
    --steel:#5A93A3;
    --steel-dim:#3C6470;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--text);
    font-family:'IBM Plex Sans', sans-serif;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3{
    font-family:'Barlow Condensed', sans-serif;
    font-weight:700;
    text-transform:uppercase;
    letter-spacing:0.01em;
    line-height:1.05;
  }
  .mono{
    font-family:'IBM Plex Mono', monospace;
    letter-spacing:0.06em;
  }
  a{color:inherit; text-decoration:none;}
  .wrap{max-width:1120px; margin:0 auto; padding:0 32px;}

  /* ---------- hatch divider (architectural insulation symbol) ---------- */
  .hatch{
    height:22px;
    width:100%;
    background-image:repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 3px,
      var(--line) 3px,
      var(--line) 4px
    );
    -webkit-mask-image: repeating-radial-gradient(circle at 10px 11px, transparent 0, transparent 6px, black 6px, black 7px);
    opacity:0.7;
  }

  /* ---------- nav ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(24,28,29,0.92);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  nav{
    display:flex; align-items:center; justify-content:space-between;
    padding:18px 32px;
    max-width:1120px; margin:0 auto;
  }
  .logo{display:flex; align-items:center;}
  .logo .plate{
    display:flex; align-items:center;
  }
  .logo .plate img{height:46px; width:auto; display:block;}
  .navlinks{display:flex; gap:28px; font-size:14px;}
  .navlinks a{
    color:var(--text-dim);
    padding:4px 0;
    border-bottom:1px solid transparent;
    transition:color .15s, border-color .15s;
  }
  .navlinks a:hover{color:var(--text); border-color:var(--copper);}
  .navlinks .cta{
    color:var(--bg); background:var(--copper);
    padding:8px 16px; border-radius:2px; font-weight:500;
  }
  .navlinks .cta:hover{background:#DE7A44; border-color:transparent;}
  .navtoggle{display:none;}

  /* ---------- hero ---------- */
  .hero{
    position:relative;
    padding:96px 0 80px;
    overflow:hidden;
  }
  .hero .wrap{
    display:grid;
    grid-template-columns:1.1fr 0.9fr;
    gap:48px;
    align-items:center;
  }
  .eyebrow{
    font-size:12px; color:var(--copper);
    display:flex; align-items:center; gap:10px; margin-bottom:22px;
  }
  .eyebrow::before{content:""; width:22px; height:1px; background:var(--copper);}
  h1.headline{
    font-size:clamp(40px, 6vw, 68px);
    color:var(--text);
  }
  h1.headline em{
    font-style:normal; color:var(--copper);
  }
  .lede{
    margin-top:24px; max-width:46ch;
    font-size:17px; color:var(--text-dim);
  }
  .heroctas{display:flex; gap:16px; margin-top:36px; flex-wrap:wrap;}
  .btn{
    display:inline-flex; align-items:center; gap:10px;
    padding:14px 24px; font-size:14px; font-weight:500;
    border-radius:2px; border:1px solid var(--line);
    transition:border-color .15s, background .15s, color .15s;
  }
  .btn-primary{background:var(--copper); border-color:var(--copper); color:#191110;}
  .btn-primary:hover{background:#DE7A44;}
  .btn-ghost{color:var(--text); }
  .btn-ghost:hover{border-color:var(--text-dim);}

  /* pipe illustration */
  .pipe-fig{position:relative; width:100%;}
  .pipe-fig svg{width:100%; height:auto; display:block;}
  .pipe-fig .cap{
    font-family:'IBM Plex Mono'; font-size:11px; fill:var(--text-dim);
    letter-spacing:0.05em;
  }

  /* ---------- section shell ---------- */
  section{padding:88px 0;}
  .section-head{max-width:56ch; margin-bottom:56px;}
  .section-head .eyebrow{margin-bottom:16px;}
  h2.section-title{font-size:clamp(30px, 4vw, 42px);}
  .section-head p{color:var(--text-dim); margin-top:16px; font-size:16px;}

  /* ---------- services ---------- */
  .services{
    display:grid;
    grid-template-columns:repeat(4, 1fr);
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
  }
  .service{
    background:var(--bg-alt);
    padding:32px 26px;
    display:flex; flex-direction:column; gap:18px;
  }
  .service .icn{width:44px; height:44px;}
  .service h3{font-size:22px; color:var(--text);}
  .service p{font-size:14px; color:var(--text-dim);}
  .service .idx{font-family:'IBM Plex Mono'; font-size:12px; color:var(--copper);}

  /* ---------- gallery ---------- */
  .gallery-grid{
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    grid-template-rows:260px repeat(3,220px);
    gap:8px;
  }
  .gallery-grid figure{
    margin:0; position:relative; overflow:hidden;
    background:var(--bg-alt);
  }
  .gallery-grid img{
    width:100%; height:100%; object-fit:cover; display:block;
    filter:grayscale(0.1) contrast(1.05);
    transition:transform .4s ease;
  }
  .gallery-grid figure:hover img{transform:scale(1.04);}
  .gallery-grid figcaption{
    position:absolute; left:0; right:0; bottom:0;
    padding:8px 12px;
    font-family:'IBM Plex Mono'; font-size:11px; letter-spacing:0.04em;
    color:var(--text); background:linear-gradient(transparent, rgba(10,12,13,0.85));
  }
  .gallery-grid .big{grid-column:1 / 3;}
  @media (max-width:760px){
    .gallery-grid{grid-template-columns:1fr 1fr; grid-template-rows:none; grid-auto-rows:160px;}
    .gallery-grid .big{grid-column:1 / 3; height:220px;}
  }

  /* ---------- about ---------- */
  .about{
    display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:start;
  }
  .team-photo{
    grid-column:1 / -1;
    margin-bottom:48px;
    position:relative;
    border:1px solid var(--line);
  }
  .team-photo img{
    width:100%; height:auto; display:block;
    filter:grayscale(0.15) contrast(1.05);
  }
  .team-photo .cap{
    position:absolute; bottom:0; left:0; right:0;
    display:flex; justify-content:space-between; align-items:center;
    padding:10px 16px;
    background:rgba(15,17,18,0.72);
    font-family:'IBM Plex Mono'; font-size:11px; color:var(--text-dim);
    letter-spacing:0.04em;
  }
  .badges{display:flex; flex-wrap:wrap; gap:10px; margin-top:28px;}
  .badge{
    font-family:'IBM Plex Mono'; font-size:12px; color:var(--steel);
    border:1px solid var(--steel-dim); padding:7px 12px; border-radius:2px;
  }
  .about-copy p{color:var(--text-dim); margin-bottom:16px; font-size:16px; max-width:52ch;}
  .about-copy p strong{color:var(--text); font-weight:500;}

  /* ---------- contact ---------- */
  .contact{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:4px;
    padding:56px;
    display:grid; grid-template-columns:1.2fr 1fr; gap:48px;
  }
  .contact h2{font-size:clamp(28px,3.6vw,38px); margin-bottom:16px;}
  .contact-copy p{color:var(--text-dim); max-width:44ch;}
  .contact-details{border-left:1px solid var(--line); padding-left:40px; display:flex; flex-direction:column; gap:20px;}
  .cd-row .k{font-family:'IBM Plex Mono'; font-size:11px; color:var(--text-dim); text-transform:uppercase;}
  .cd-row .v{font-size:17px; margin-top:4px;}
  .cd-row a.v:hover{color:var(--copper);}

  /* ---------- footer ---------- */
  footer{border-top:1px solid var(--line); padding:32px 0;}
  footer .wrap{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;}
  footer .flogo{display:flex; align-items:center; gap:12px;}
  footer .flogo .plate{display:flex;}
  footer .flogo .plate img{height:22px; width:auto; display:block;}
  footer .flinks{display:flex; gap:24px;}
  footer .flinks a{font-size:13px; color:var(--text-dim);}
  footer .flinks a:hover{color:var(--text);}
  footer .fc{font-size:12px; color:var(--text-dim); font-family:'IBM Plex Mono';}

  @media (max-width:860px){
    .navlinks{display:none;}
    .hero .wrap{grid-template-columns:1fr;}
    .pipe-fig{order:-1;}
    .services{grid-template-columns:1fr 1fr;}
    .about{grid-template-columns:1fr;}
    .contact{grid-template-columns:1fr; padding:36px 24px;}
    .contact-details{border-left:none; border-top:1px solid var(--line); padding-left:0; padding-top:28px;}
  }
  @media (max-width:520px){
    .services{grid-template-columns:1fr;}
  }

  /* Erfahrungs-Band: Foto im Duoton + technische Zeichnung */
  .erfahrung{position:relative; padding:0; min-height:clamp(340px,32vw,470px); display:flex; align-items:center; overflow:hidden; background:var(--bg);}
  .erf-bg{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; object-position:right center; pointer-events:none;}
  .erfahrung .wrap{position:relative; width:100%;}
  .erf-copy{max-width:36ch;}
  .erf-copy .section-title{margin-bottom:20px;}
  .erf-copy p{color:var(--text-dim); max-width:38ch;}
  @media (max-width:860px){
    .erf-bg{opacity:.5;}
    .erfahrung::before{content:""; position:absolute; inset:0; z-index:1; background:linear-gradient(90deg,var(--bg) 25%,rgba(24,28,29,.55) 100%);}
    .erfahrung .wrap{z-index:2;}
  }

  /* Referenzen */
  .ref-stats{display:grid; grid-template-columns:repeat(3,1fr); border-top:1px solid var(--line); border-bottom:1px solid var(--line); margin-bottom:48px;}
  .ref-stat{padding:28px 0; text-align:center;}
  .ref-stat + .ref-stat{border-left:1px solid var(--line);}
  .ref-stat .n{font-family:'IBM Plex Mono'; font-size:clamp(28px,4vw,44px); color:var(--copper); line-height:1;}
  .ref-stat .l{font-size:13px; color:var(--text-dim); margin-top:10px;}
  .ref-list{list-style:none; margin:0; padding:0; border-top:1px solid var(--line);}
  .ref-list li{display:grid; grid-template-columns:110px 1fr 190px; gap:24px; align-items:baseline; padding:18px 0; border-bottom:1px solid var(--line);}
  .ref-list .yr{font-family:'IBM Plex Mono'; font-size:13px; color:var(--text-dim);}
  .ref-list .pj{font-size:17px; color:var(--text);}
  .ref-list .pj small{display:block; font-size:13px; color:var(--text-dim); margin-top:4px;}
  .ref-list .tag{font-family:'IBM Plex Mono'; font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--steel); text-align:right;}
  .ref-note{font-size:13px; color:var(--text-dim); margin-top:20px;}
  @media (max-width:760px){
    .ref-list li{grid-template-columns:1fr; gap:6px;}
    .ref-list .tag{text-align:left;}
    .ref-stat{padding:20px 6px;}
    .ref-stat .l{font-size:12px;}
  }
@font-face{font-family:'Barlow Condensed';font-style:normal;font-weight:500;font-display:swap;src:url(fonts/barlow-condensed-500.woff2) format('woff2');}
@font-face{font-family:'Barlow Condensed';font-style:normal;font-weight:600;font-display:swap;src:url(fonts/barlow-condensed-600.woff2) format('woff2');}
@font-face{font-family:'Barlow Condensed';font-style:normal;font-weight:700;font-display:swap;src:url(fonts/barlow-condensed-700.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/ibm-plex-sans-400.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:500;font-display:swap;src:url(fonts/ibm-plex-sans-500.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url(fonts/ibm-plex-sans-600.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/ibm-plex-mono-400.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(fonts/ibm-plex-mono-500.woff2) format('woff2');}
.navtoggle{display:none;cursor:pointer;border:1px solid var(--line);color:var(--text);background:var(--bg-alt);padding:9px 13px;font:inherit}
a:focus-visible,button:focus-visible{outline:2px solid var(--copper);outline-offset:3px}
@media(max-width:860px){
 .navtoggle{display:block}
 nav{flex-wrap:wrap}
 .navlinks{display:none;width:100%;flex-basis:100%;padding:16px 0;flex-direction:column;gap:12px}
 .navlinks.is-open{display:flex}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.gallery-grid{grid-template-rows:none;grid-auto-rows:220px}
.gallery-grid figure{min-height:0}
@media(max-width:760px){.gallery-grid{grid-auto-rows:170px}}

.logo .plate img{height:58px;}
.hero-firma{font-family:'Barlow Condensed',sans-serif;font-weight:600;text-transform:uppercase;font-size:clamp(26px,3.4vw,40px);letter-spacing:.08em;color:#F2EEE6;margin:0 0 6px;line-height:1.1;}
.hero-firma span{color:#D87B43;}
@media(max-width:860px){.logo .plate img{height:46px;}}
/* Rechtstexte (eigene Seiten) */
.legal{padding:48px 0 88px;}
.legal .wrap{max-width:820px;}
.legal h1{font-family:'Barlow Condensed',sans-serif; font-weight:700; text-transform:uppercase; font-size:clamp(34px,5vw,52px); line-height:1.05; margin:0 0 28px;}
.legal h2{font-size:19px; font-weight:600; margin:36px 0 10px; color:var(--text);}
.legal h3{font-size:15px; font-weight:600; margin:22px 0 6px; color:var(--text);}
.legal p,.legal li{color:var(--text-dim); font-size:15px; line-height:1.7; max-width:70ch;}
.legal ul{padding-left:20px;}
.legal a{color:var(--copper); text-decoration:underline;}
.backlink{font-family:'IBM Plex Mono',monospace; font-size:13px; color:var(--copper); padding:12px 0;}
.backlink:hover{color:var(--text);}

/* Kontrast: kleine Kupfer-Schrift etwas heller (WCAG AA) */
.eyebrow,.service .idx{color:#D87B43;}
.eyebrow::before{background:var(--copper);}

/* Einsatzgebiet */
.einsatz{display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:start;}
.einsatz .section-title{margin-bottom:24px;}
.einsatz h3{font-size:22px; margin-bottom:16px;}
.worklist{list-style:none; margin:0; padding:0; border-top:1px solid var(--line);}
.worklist li{position:relative; padding:14px 0 14px 24px; border-bottom:1px solid var(--line); color:var(--text-dim); font-size:15px;}
.worklist li::before{content:""; position:absolute; left:0; top:50%; width:12px; height:2px; margin-top:-1px; background:var(--copper);}
@media(max-width:860px){.einsatz{grid-template-columns:1fr; gap:32px;}}
/* ===== Optimierung: Handy, Bedienung ===== */
html{-webkit-text-size-adjust:100%; text-size-adjust:100%;}
section[id]{scroll-margin-top:72px;}
img{max-width:100%;}
.skip{position:absolute; left:-999px; top:0; z-index:300; background:var(--copper); color:#191110; padding:10px 16px; font-weight:500;}
.skip:focus{left:8px; top:8px;}
.heroctas--spaced{margin-top:28px;}
.navcall{display:none; align-items:center; justify-content:center; width:44px; height:44px; border:1px solid var(--copper); border-radius:2px; color:var(--copper);}
.navcall svg{width:20px; height:20px;}
.navtoggle{min-height:44px;}
@media(max-width:860px){
  nav{padding:12px 20px;}
  .logo .plate img{height:38px;}
  .navcall{display:inline-flex; margin-left:auto; margin-right:10px;}
  .navlinks a{padding:12px 0; font-size:16px;}
  .navlinks .cta{text-align:center; padding:14px 16px;}
  .wrap{padding:0 20px;}
  .hero{padding:48px 0 40px;}
  .hero .wrap{gap:28px;}
  .pipe-fig{order:0; max-width:340px; margin:0 auto;}
  section{padding:56px 0;}
  .section-head{margin-bottom:36px;}
  .about{gap:32px;}
  footer .wrap{flex-direction:column; align-items:flex-start;}
}
@media(max-width:560px){
  .heroctas .btn{flex:1 1 100%; justify-content:center;}
  .ref-stats{grid-template-columns:1fr;}
  .ref-stat + .ref-stat{border-left:none; border-top:1px solid var(--line);}
  .ref-stat{padding:18px 0;}
  .ref-stat .n{font-size:30px;}
  .gallery-grid{grid-template-columns:1fr; grid-auto-rows:230px;}
  .gallery-grid .big{grid-column:auto; height:auto;}
  .erfahrung{min-height:380px;}
  .team-photo{margin-bottom:32px;}
  .contact{padding:28px 20px;}
  .legal{padding:32px 0 64px;}
}