/* Kompressorenbau Bannewitz GmbH - steel paper, ink and bronze */
:root{
  --ink:#12222b; --ink2:#1c3340; --paper:#e8ecee; --light:#f6f8f8; --steel:#5c6b73;
  --line:#c3ccd1; --bronze:#b8732f; --bronze-d:#8f5518;
  --head:"Bahnschrift","DIN Alternate","Segoe UI Semibold","Helvetica Neue",Arial,sans-serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --w:1280px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--body);font-size:1.0625rem;line-height:1.7;color:var(--ink);background:var(--paper)}
a{color:inherit}
h1,h2,h3{font-family:var(--head);line-height:1.12;letter-spacing:-.01em;font-weight:600}
h1{font-size:clamp(2.3rem,5vw,4rem)}
h2{font-size:clamp(1.9rem,3.4vw,2.8rem)}
h3{font-size:1.25rem}
.wrap{width:min(var(--w),100% - 3rem);margin-inline:auto}
:focus-visible{outline:3px solid var(--bronze);outline-offset:3px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:var(--ink);color:var(--light);border-bottom:3px solid var(--bronze)}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:1rem}
.brand{display:flex;align-items:center;gap:.8rem;text-decoration:none;font-family:var(--head);font-size:1rem;line-height:1.2}
.nav{display:flex;align-items:center;gap:2rem}
.nav a{text-decoration:none;font-size:.98rem;padding:.3rem 0;border-bottom:2px solid transparent;transition:border-color .2s}
.nav a:hover{border-color:var(--bronze)}
.nav .nav-cta{background:var(--bronze);color:var(--ink);padding:.55rem 1.2rem;font-weight:600;border:0;transition:background .2s}
.nav .nav-cta:hover{background:#d08a45}
.nav-toggle{display:none;background:none;border:1px solid #4a5d68;padding:.65rem .6rem;cursor:pointer}
.nav-toggle i{display:block;width:22px;height:2px;background:var(--light);margin:4px 0;transition:transform .25s,opacity .25s}
.nav-toggle[aria-expanded="true"] i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* shared */
.section{padding:clamp(4.5rem,9vw,7.5rem) 0}
.band{background:var(--light)}
.lead{font-size:1.2rem;line-height:1.65;max-width:62ch}
.lead.dark{color:var(--ink)}
.btn{display:inline-block;background:var(--bronze);color:var(--ink);font:600 1rem var(--head);padding:.95rem 1.8rem;border:2px solid var(--bronze);text-decoration:none;cursor:pointer;transition:background .2s,transform .2s}
.btn:hover{background:#d08a45;border-color:#d08a45;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--light);border-color:#6b808c}
.btn-ghost:hover{background:#ffffff14;border-color:var(--light)}
.tag{display:inline-block;font-size:.95rem;color:#e0b384;border-left:3px solid var(--bronze);padding-left:.8rem;margin-bottom:1.5rem}
.sec-head{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:end;margin-bottom:3rem}
.sec-head.left{display:block}
.sec-head p{color:var(--steel);max-width:52ch}

/* hero */
.hero{background:var(--ink);color:var(--light);padding:clamp(4rem,8vw,7rem) 0;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:center}
.hero .lead{color:#c5d1d8;margin:1.5rem 0 2.2rem}
.actions{display:flex;flex-wrap:wrap;gap:1rem}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:3.2rem;padding-top:1.6rem;border-top:1px solid #35505e}
.facts dt{font-size:.85rem;color:#8da0ab}
.facts dd{font-family:var(--head);font-size:1.1rem}
.hero-art{text-align:center}
.hero-art svg{width:100%;max-width:470px;height:auto}
.hero-art svg>use{transform-origin:0 0;transform-box:view-box;animation:spin 70s linear infinite}
.hero-art figcaption{font-size:.85rem;color:#8da0ab;margin-top:.8rem}
.blades *{fill:#c98a4b}
.ring{fill:none;stroke:#35505e;stroke-width:3}.ring.thin{stroke-width:1;stroke-dasharray:3 6}
.hub{fill:#e8ecee}.bore{fill:#12222b}
@keyframes spin{to{transform:rotate(360deg)}}

/* about */
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(2rem,6vw,5rem);align-items:start}
.about-head h2{margin-bottom:2rem}
.img-block{aspect-ratio:4/3;display:flex;align-items:flex-end;padding:1rem;color:#9fb0ba;font-size:.9rem;
  background:repeating-linear-gradient(45deg,#d6dde1 0 12px,#cdd6db 12px 24px);border:1px solid var(--line)}
.about-body p+p{margin-top:1.2rem}
.about-body p:not(.lead){color:#33454f;max-width:68ch}
.panel{margin-top:2.2rem;background:var(--light);border-top:4px solid var(--bronze);padding:1.6rem 1.8rem}
.panel h3{margin-bottom:.8rem}
.panel li{list-style:none;display:grid;grid-template-columns:110px 1fr;padding:.55rem 0;border-top:1px solid var(--line);font-size:1rem}
.panel li span{color:var(--steel)}

/* services - ruled rows */
.svc-list{list-style:none;border-top:2px solid var(--ink)}
.svc{display:grid;grid-template-columns:.9fr 1.5fr auto;gap:2rem;align-items:center;padding:1.7rem .8rem;border-bottom:1px solid var(--line);transition:background .25s,padding-left .25s}
.svc:hover{background:var(--paper);padding-left:1.4rem}
.svc p{color:#33454f}
.chip{font-size:.85rem;border:1px solid var(--steel);color:var(--steel);padding:.2rem .8rem;white-space:nowrap}

/* benefits - asymmetric */
.ben-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:1.2rem}
.ben{grid-column:span 2;padding:1.8rem;border:1px solid var(--line);background:var(--light);transition:border-color .25s,transform .25s}
.ben:hover{border-color:var(--bronze);transform:translateY(-3px)}
.ben h3{margin-bottom:.6rem}
.ben p{color:#33454f;font-size:1rem}
.ben.big{grid-column:span 6;background:var(--ink2);color:var(--light);padding:2.6rem;border-color:var(--ink2)}
.ben.big h3{font-size:clamp(1.6rem,3vw,2.2rem)}
.ben.big p{color:#c5d1d8;max-width:70ch;font-size:1.15rem}
.ben:nth-child(5){grid-column:span 3}.ben:nth-child(4){grid-column:span 3}

/* contact */
.dark{background:var(--ink);color:var(--light)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,6vw,5rem)}
.contact-grid .lead{color:#c5d1d8;margin:1.2rem 0 2rem}
address{font-style:normal;border-left:3px solid var(--bronze);padding-left:1.2rem}
address p+p{margin-top:.8rem}
address a{color:#e0b384}
.form{background:var(--light);color:var(--ink);padding:2rem;display:grid;gap:1.1rem}
.field label{display:block;font:600 .95rem var(--head);margin-bottom:.3rem}
.field input,.field textarea{width:100%;font:inherit;padding:.75rem .9rem;border:1px solid #9aa9b1;background:#fff;color:var(--ink);border-radius:0}
.field input:focus,.field textarea:focus{outline:2px solid var(--bronze);border-color:var(--bronze)}
.field.invalid input,.field.invalid textarea{border-color:#a8321f}
.err{display:block;color:#a8321f;font-size:.88rem;min-height:1.1em}
.form .btn{justify-self:start}
.status{font-size:.95rem;color:#1d6b3a;min-height:1.2em}

/* footer */
.site-footer{background:#0b161c;color:#9fb0ba;padding:2.5rem 0;font-size:.95rem}
.foot{display:flex;justify-content:space-between;gap:1.5rem;flex-wrap:wrap}
.site-footer strong{color:var(--light)}
.site-footer a{color:#e0b384}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media (max-width:980px){
  .hero-grid,.about-grid,.contact-grid,.sec-head{grid-template-columns:1fr}
  .hero-art{order:-1}.hero-art svg{max-width:300px}
  .svc{grid-template-columns:1fr;gap:.5rem}.chip{justify-self:start}
  .ben,.ben:nth-child(4),.ben:nth-child(5){grid-column:span 3}
}
@media (max-width:720px){
  .nav-toggle{display:block}
  .nav{position:absolute;top:100%;left:0;right:0;background:var(--ink);flex-direction:column;align-items:stretch;gap:0;padding:.5rem 1.5rem 1.5rem;display:none;border-bottom:3px solid var(--bronze)}
  .nav.open{display:flex}
  .nav a{padding:.9rem 0;border-bottom:1px solid #2a4150}
  .nav .nav-cta{text-align:center;margin-top:1rem}
  .facts{grid-template-columns:1fr}
  .ben,.ben:nth-child(4),.ben:nth-child(5){grid-column:span 6}
  .panel li{grid-template-columns:1fr}
  .form{padding:1.4rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}