/* STC Celle – Leitstand-Design: dunkle Panels auf Graphit, Raster-Linien, Mono-Tags wie in einer HMI */

/* Schriften lokal eingebunden (DSGVO: keine Verbindung zu Google) */
@font-face{font-family:"Barlow Condensed";font-weight:600;font-display:swap;src:url("../fonts/barlow-condensed-600.woff2") format("woff2")}
@font-face{font-family:"Barlow Condensed";font-weight:700;font-display:swap;src:url("../fonts/barlow-condensed-700.woff2") format("woff2")}
@font-face{font-family:"Barlow";font-weight:400;font-display:swap;src:url("../fonts/barlow-400.woff2") format("woff2")}
@font-face{font-family:"Barlow";font-weight:500;font-display:swap;src:url("../fonts/barlow-500.woff2") format("woff2")}
@font-face{font-family:"Barlow";font-weight:600;font-display:swap;src:url("../fonts/barlow-600.woff2") format("woff2")}
@font-face{font-family:"JetBrains Mono";font-weight:400 500;font-display:swap;src:url("../fonts/jetbrains-mono.woff2") format("woff2")}

:root{
  --bg:#0b0f13;
  --panel:#11171d;
  --panel-2:#161e26;
  --line:#22303b;
  --fg:#e4eaef;
  --muted:#8d9ba7;
  --accent:#3d9bff;      /* STC-Blau (#1D70B8), aufgehellt für dunklen Grund */
  --accent-dim:#1c4f86;
  --signal:#f2b33d;
  --ok:#3ccf8e;
  --f-display:"Barlow Condensed","Arial Narrow",system-ui,sans-serif;
  --f-body:"Barlow",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
  --wrap:1180px;
  --gutter:clamp(16px,4vw,40px);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;background:var(--bg);color:var(--fg);font:400 17px/1.6 var(--f-body);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--accent);color:#04121f;padding:10px 14px}
.skip:focus{left:8px}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
h1,h2,h3{font-family:var(--f-display);font-weight:600;line-height:1.05;text-wrap:balance;margin:0;letter-spacing:.01em}
.tag{font:500 12px/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.tag b{color:var(--accent);font-weight:500}

/* Header */
.site-header{position:sticky;top:0;z-index:20;background:rgba(11,15,19,.9);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:block;line-height:0}
.brand img{height:40px;width:auto}
.nav ul{display:flex;gap:28px;list-style:none;margin:0 0 0 auto;padding:0}
.nav ul a{text-decoration:none;font:500 15px/1 var(--f-body);color:var(--muted);transition:color .15s}
.nav ul a:hover,.nav ul a[aria-current]{color:var(--fg)}
.menu-btn{display:none;background:none;border:1px solid var(--line);color:var(--fg);width:44px;height:44px;cursor:pointer}
.menu-btn span,.menu-btn span::before,.menu-btn span::after{display:block;width:18px;height:2px;background:currentColor;margin:auto;position:relative;transition:transform .2s}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0}
.menu-btn span::before{top:-6px}.menu-btn span::after{top:6px}
.menu-open .menu-btn span{background:transparent}
.menu-open .menu-btn span::before{transform:translateY(6px) rotate(45deg)}
.menu-open .menu-btn span::after{transform:translateY(-6px) rotate(-45deg)}
.lang{display:flex;border:1px solid var(--line)}
.lang a{font:500 12px/1 var(--f-mono);letter-spacing:.08em;text-decoration:none;color:var(--muted);padding:8px 10px;transition:color .15s,background .15s}
.lang a:hover{color:var(--fg)}
.lang a[aria-current]{background:var(--panel-2);color:var(--fg)}
.btn{display:inline-flex;align-items:center;gap:10px;font:600 15px/1 var(--f-body);text-decoration:none;padding:13px 20px;border:1px solid var(--accent);background:var(--accent);color:#04121f;transition:background .15s,color .15s;cursor:pointer}
.btn:hover{background:transparent;color:var(--accent)}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--fg)}
@media (max-width:860px){
  .brand img{height:34px}
  .menu-btn{display:block}
  .lang{margin-left:auto}
  .nav{gap:12px}
  .lang a{padding:15px 12px}
  .nav ul{display:none;position:absolute;top:72px;left:0;right:0;flex-direction:column;gap:0;background:var(--panel);border-bottom:1px solid var(--line);padding:8px var(--gutter) 16px}
  .nav ul a{display:block;padding:14px 0;font-size:18px;border-bottom:1px solid var(--line)}
  .menu-open .nav ul{display:flex}
}

/* Hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
#wires{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--bg) 0%,rgba(11,15,19,.82) 45%,rgba(11,15,19,0) 100%);pointer-events:none}
.hero .wrap{position:relative;z-index:1;padding-block:clamp(72px,11vw,140px) clamp(56px,8vw,96px)}
.status{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);background:var(--panel);padding:8px 12px;margin-bottom:28px;line-height:1.4}
.led{flex:none;width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok)}
.led.warn{background:var(--signal);box-shadow:0 0 10px var(--signal)}
section.no-top{padding-top:0}
.hero h1{font-size:clamp(46px,7.4vw,96px);font-weight:700;text-transform:uppercase;max-width:12ch}
.hero h1 em{font-style:normal;color:var(--accent)}
.lead{font-size:clamp(18px,1.6vw,21px);color:var(--muted);max-width:52ch;margin:24px 0 36px}
.lead strong{color:var(--fg);font-weight:500}
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.facts{display:grid;grid-template-columns:repeat(3,minmax(0,auto));justify-content:start;margin-top:64px;border:1px solid var(--line);background:rgba(17,23,29,.85);width:fit-content;max-width:100%}
.facts div{padding:16px 26px;border-right:1px solid var(--line)}
.facts div:last-child{border-right:0}
.facts b{display:block;font:600 32px/1 var(--f-display);font-variant-numeric:tabular-nums}
.facts span{font:500 11px/1.4 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
@media (max-width:560px){.facts{grid-template-columns:1fr;width:100%}.facts div{border-right:0;border-bottom:1px solid var(--line)}.facts div:last-child{border-bottom:0}}

/* Abschnitte */
section{padding-block:clamp(72px,9vw,120px)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px 64px;align-items:end;margin-bottom:48px}
.sec-head h2{font-size:clamp(36px,4.6vw,58px);text-transform:uppercase}
.sec-head p{color:var(--muted);margin:0;max-width:52ch}
.sec-head .tag{grid-column:1/-1}
@media (max-width:860px){.sec-head{grid-template-columns:1fr}}

/* Leistungen */
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}
.card{min-width:0;padding:32px 28px 30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .2s;display:flex;flex-direction:column;gap:14px}
.card:hover{background:var(--panel)}
.card svg{width:36px;height:36px;stroke:var(--accent);fill:none;stroke-width:1.5}
.card h3{font-size:26px;text-transform:uppercase}
.card p{margin:0;color:var(--muted);font-size:16px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:8px}
.chips span{font:400 12px/1 var(--f-mono);background:var(--panel-2);border:1px solid var(--line);padding:6px 8px}
@media (max-width:620px){.grid{grid-template-columns:1fr}}

/* Ablauf */
.flow{background:var(--panel);border-block:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;margin:0;padding:0}
.steps li{position:relative;padding:28px 24px 8px 0;border-top:2px solid var(--line);min-width:0}
.steps li::before{content:"";position:absolute;top:-2px;left:0;width:48px;height:2px;background:var(--accent)}
.steps .tag{display:block;margin-bottom:12px}
.steps h3{font-size:24px;text-transform:uppercase;margin-bottom:8px}
.steps p{margin:0;color:var(--muted);font-size:16px;max-width:30ch}
@media (max-width:860px){.steps{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:32px}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* Unternehmen + Branchen */
.about{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(32px,6vw,88px)}
.about .big{font:500 clamp(24px,2.6vw,32px)/1.3 var(--f-body);margin:20px 0 24px}
.about .big em{font-style:normal;color:var(--accent)}
.about p{color:var(--muted);max-width:54ch}
.branchen{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.branchen li{display:grid;grid-template-columns:120px minmax(0,1fr);gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.branchen h3{font-size:22px;text-transform:uppercase;margin-bottom:4px}
.branchen p{margin:0;font-size:16px}
@media (max-width:860px){.about{grid-template-columns:1fr}}
@media (max-width:480px){.branchen li{grid-template-columns:1fr;gap:6px}}

/* Referenzen */
.refs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border:1px solid var(--line);list-style:none;margin:0;padding:0}
.refs li{display:flex;align-items:center;justify-content:center;padding:32px 20px;border-right:1px solid var(--line);min-height:120px}
.refs li:last-child{border-right:0}
.refs img{max-height:44px;width:auto;opacity:.55;transition:opacity .2s}
.refs img.square{max-height:64px}
.refs li:hover img{opacity:.95}
.refs-note{margin-top:16px;color:var(--muted);font-size:15px}
@media (max-width:860px){.refs{grid-template-columns:repeat(2,minmax(0,1fr))}.refs li{border-bottom:1px solid var(--line)}.refs li:nth-child(2n){border-right:0}.refs li:last-child{grid-column:1/-1;border-bottom:0}}

/* Kontakt */
.contact{background:var(--panel);border-top:1px solid var(--line)}
.contact-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(32px,6vw,88px);align-items:end}
.contact h2{font-size:clamp(36px,4.6vw,58px);text-transform:uppercase;margin:16px 0 20px}
.contact-intro{color:var(--muted);max-width:44ch;margin:0 0 28px}
.contact address{font-style:normal;color:var(--fg);line-height:1.7}
.channels{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.channels li{display:grid;grid-template-columns:110px minmax(0,1fr);align-items:baseline;gap:20px;padding:24px 0;border-bottom:1px solid var(--line)}
.channels a,.channels li>span:last-child{font:600 clamp(28px,3.6vw,46px)/1.1 var(--f-display);letter-spacing:.01em;text-decoration:none;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.channels a{transition:color .15s}
.channels a:hover{color:var(--accent)}
.channels .minor>span:last-child{font-size:clamp(20px,2vw,26px);color:var(--muted)}
@media (max-width:860px){.contact-grid{grid-template-columns:1fr;align-items:start}}
@media (max-width:480px){.channels li{grid-template-columns:1fr;gap:8px}}

/* Rechtstexte */
.legal .wrap{max-width:820px}
.legal h1{font-size:clamp(40px,6vw,64px);text-transform:uppercase;margin:16px 0 40px}
.legal h2{font-size:26px;text-transform:uppercase;margin:44px 0 12px}
.legal h3{font-family:var(--f-body);font-size:17px;font-weight:600;margin:24px 0 6px}
.legal p,.legal li{color:var(--muted)}
.legal strong{color:var(--fg);font-weight:500}
.legal a{color:var(--accent)}
.legal address{font-style:normal;color:var(--fg)}

/* 404 */
.notfound{min-height:60vh;display:flex;align-items:center}
.notfound h1{font-size:clamp(46px,7vw,88px);text-transform:uppercase;margin:16px 0}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding-block:28px}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;color:var(--muted);font-size:14px}
.site-footer nav{display:flex;gap:24px}
.site-footer a{text-decoration:none}
.site-footer a:hover{color:var(--fg)}