/* STF — Lock: Oxide/Elektron dark technical (carbon canvas, graphite panels, fine slate dividers, one signal accent = logo red, tabular references); Space Grotesk display, documentary welding photography */
:root{--carbon:#0f1114;--panel:#171a1f;--panel2:#1e2229;--line:#2a2f37;--white:#f4f5f7;--text:#c8ccd3;--muted:#8a909a;--red:#c8432f;--navy:#1b2a55;
--disp:'Space Grotesk',system-ui,sans-serif;--body:'Inter',system-ui,sans-serif;--max:1360px;--g:clamp(20px,4vw,56px)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--carbon);color:var(--text);font-family:var(--body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}p{margin:0}
h1,h2,h3{margin:0;hyphens:auto;font-family:var(--disp);font-weight:700;letter-spacing:-.02em;line-height:1.05;color:var(--white);text-wrap:balance}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--g)}
.label{font-family:var(--disp);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--red);font-weight:700}
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--disp);font-weight:700;font-size:15px;padding:14px 22px;border:1px solid var(--white);color:var(--white);transition:.2s;border-radius:2px}
.btn:hover{background:var(--white);color:var(--carbon)}
.btn.red{background:var(--red);border-color:var(--red);color:#fff}.btn.red:hover{background:#a8351f;border-color:#a8351f;color:#fff}
/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(15,17,20,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:74px;gap:28px}
.nav .logo svg{height:40px;width:auto;display:block}
.nav ul{display:flex;gap:26px;list-style:none;margin:0;padding:0}
.nav li a{font-size:14px;font-weight:500;color:var(--text);padding:6px 0;border-bottom:1px solid transparent}
.nav li a:hover,.nav li a[aria-current]{color:var(--white);border-color:var(--red)}
.burger{display:none;background:none;border:1px solid var(--white);width:44px;height:44px;cursor:pointer}.burger span{display:block;width:18px;height:1px;background:var(--white);margin:3px auto}
/* hero */
.hero{position:relative;min-height:min(86vh,820px);display:grid;align-items:end;overflow:hidden}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.7)}
.hero::after{content:"";position:absolute;inset:0;z-index:0;background:linear-gradient(to top,rgba(15,17,20,.95) 0%,rgba(15,17,20,.35) 55%,rgba(15,17,20,.1) 100%)}
.hero .wrap{position:relative;z-index:1;padding-top:120px;padding-bottom:clamp(48px,6vw,80px);width:100%}
.hero h1{font-size:clamp(42px,6.4vw,92px);max-width:14ch}
.hero .row{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:end;margin-top:32px}
.hero p{font-size:19px;max-width:54ch;color:#d7dae0}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.tick{display:flex;gap:28px;flex-wrap:wrap;border-top:1px solid var(--line);padding:18px 0;font-family:var(--disp);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.tick span::before{content:"◆";color:var(--red);margin-right:10px;font-size:9px;vertical-align:2px}
/* sections */
section{padding:clamp(64px,8vw,112px) 0}
.h2{font-size:clamp(30px,4.4vw,58px);max-width:18ch}
.lead{font-size:18px;color:var(--text);max-width:58ch}
.head{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:end;margin-bottom:44px}
/* services index */
.idx{border-top:1px solid var(--line)}
.idx a{display:grid;grid-template-columns:64px 1.1fr 1.6fr 32px;gap:24px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);transition:background .2s}
.idx a:hover{background:var(--panel)}
.idx .n{font-family:var(--disp);color:var(--red);font-weight:700;font-size:14px;letter-spacing:.1em}
.idx h3{font-size:22px;min-width:0;overflow-wrap:anywhere;hyphens:auto}
.idx p{font-size:15px;color:var(--text);min-width:0}
.idx .ar{color:var(--muted);font-size:22px;text-align:right}
.idx a:hover .ar{color:var(--white)}
/* photo mosaic */
.mosaic{display:grid;grid-template-columns:2fr 1fr 1fr;grid-auto-rows:280px;gap:8px}
.mosaic figure{margin:0;overflow:hidden;position:relative;background:var(--panel)}
.mosaic figure:first-child{grid-row:span 2}
.mosaic img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.mosaic figure:hover img{transform:scale(1.03)}
.mosaic figcaption{position:absolute;left:0;bottom:0;padding:8px 12px;background:rgba(15,17,20,.85);font-family:var(--disp);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--white)}
/* panels */
.panels{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.panel{background:var(--panel);border:1px solid var(--line);padding:28px 26px 30px}
.panel h3{font-size:22px;margin:14px 0 10px}.panel p{font-size:15px}
.panel ul{margin:12px 0 0;padding-left:18px;font-size:14px;color:var(--text)}
/* refs table */
.refs{width:100%;border-collapse:collapse;border-top:1px solid var(--line);font-size:15px}
.refs th{text-align:left;font-family:var(--disp);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:700;padding:12px 16px 12px 0;border-bottom:1px solid var(--line)}
.refs td{padding:16px 16px 16px 0;border-bottom:1px solid var(--line);vertical-align:top}
.refs td:first-child{color:var(--white);font-weight:500;width:28%}
.refs td:nth-child(2){width:32%}
/* equipment */
.equip{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.equip div{background:var(--panel);border:1px solid var(--line);padding:24px}
.equip h3{font-size:18px;margin-bottom:12px}
.equip ul{margin:0;padding:0;list-style:none}
.equip li{font-size:14px;padding:7px 0;border-top:1px solid var(--line)}
/* contact */
.contact{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;background:var(--panel);border:1px solid var(--line);padding:clamp(28px,4vw,56px)}
.contact h3{font-size:22px;margin-bottom:8px}
.contact .big{font-family:var(--disp);font-size:clamp(24px,3vw,36px);color:var(--white);font-weight:700}
footer{border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;align-items:center;min-height:64px;gap:24px;flex-wrap:wrap;padding-block:12px}
footer a{margin-right:20px;color:var(--text)}footer a:hover{color:var(--white)}
.page-head{padding:clamp(48px,6vw,80px) 0 0}
.page-head h1{font-size:clamp(36px,5.2vw,72px);max-width:16ch}.page-head .lead{margin-top:22px}
.figure{margin-top:44px;overflow:hidden}.figure img{width:100%;aspect-ratio:21/9;object-fit:cover}
.prose{max-width:76ch}.prose h2{font-size:26px;margin:44px 0 12px}.prose h3{font-size:19px;margin:28px 0 8px}.prose p{margin:0 0 14px}
.svc{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,64px);align-items:start;padding:clamp(40px,5vw,64px) 0;border-top:1px solid var(--line)}
.svc:first-of-type{border-top:0}
.svc figure{margin:0;overflow:hidden;background:var(--panel)}.svc img{width:100%;aspect-ratio:4/3;object-fit:cover}
.svc h2{font-size:clamp(26px,3.2vw,40px);margin-top:10px}.svc p{margin-top:14px}
form.anfrage{display:grid;grid-template-columns:1fr 1fr;gap:18px 24px;margin-top:8px}
form.anfrage label{display:grid;gap:6px;font-family:var(--disp);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
form.anfrage input,form.anfrage textarea{font:inherit;font-size:16px;padding:12px 14px;border:1px solid var(--line);background:var(--carbon);color:var(--white);border-radius:2px;outline:0}
form.anfrage input:focus,form.anfrage textarea:focus{border-color:var(--red)}
form.anfrage .full{grid-column:1/-1}form.anfrage textarea{min-height:120px}
@media(max-width:1000px){.head,.hero .row,.contact,.svc{grid-template-columns:1fr}.panels{grid-template-columns:1fr}.mosaic{grid-template-columns:1fr 1fr;grid-auto-rows:220px}.mosaic figure:first-child{grid-column:span 2}.idx a{grid-template-columns:48px 1fr 24px}.idx p{grid-column:2}.equip{grid-template-columns:1fr}}
@media(max-width:800px){.nav ul,.nav>.wrap>.btn{display:none}.burger{display:block}.nav.open ul{display:flex;position:absolute;left:0;right:0;top:74px;background:var(--carbon);flex-direction:column;gap:0;padding:8px var(--g) 20px;border-bottom:1px solid var(--line)}.nav.open li a{display:block;padding:14px 0;font-size:18px;border-bottom:1px solid var(--line)}
form.anfrage{grid-template-columns:1fr}.refs td:first-child,.refs td:nth-child(2){width:auto}.refs{font-size:14px}}