/* ===========================================================
   Alta Engineering AG — shared styles
   Light + professional dark mode, manual theme toggle
   =========================================================== */

/* ---------- LIGHT (default) ---------- */
:root{
  color-scheme: light;
  --bg:#ffffff;
  --alt:#f5f7f9;
  --surface:#ffffff;
  --surface-2:#f0f3f6;
  --chip:#eaf1f8;
  --text:#1b2531;
  --muted:#586573;
  --line:#e4e8ed;
  --line-2:#d3d9e0;
  --accent:#215d92;
  --accent-dark:#184a78;
  --btn:#215d92;
  --btn-hover:#184a78;
  --header-bg:rgba(255,255,255,.9);
  --footer-bg:#111925;
  --footer-text:#aab4c0;
  --footer-head:#ffffff;
  --footer-muted:#7d8794;
  --footer-line:rgba(255,255,255,.1);
  --shadow:rgba(20,30,45,.09);
  --shadow-strong:rgba(20,30,45,.16);
  --map-filter:grayscale(.12) contrast(1.02);
  --img-filter:none;

  --maxw:1180px;
  --gutter:clamp(18px,4.5vw,56px);
  --radius:10px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

/* ---------- DARK — professional engineering palette ---------- */
:root[data-theme="dark"]{
  color-scheme: dark;
  --bg:#0d1218;
  --alt:#121a23;
  --surface:#16202b;
  --surface-2:#1c2833;
  --chip:rgba(96,168,235,.14);
  --text:#e7edf3;
  --muted:#94a3b2;
  --line:#22303c;
  --line-2:#2f3f4d;
  --accent:#5aa6ec;
  --accent-dark:#82bef2;
  --btn:#2f74b8;
  --btn-hover:#3d86cd;
  --header-bg:rgba(13,18,24,.82);
  --footer-bg:#090d12;
  --footer-text:#8c99a6;
  --footer-head:#e7edf3;
  --footer-muted:#68757f;
  --footer-line:rgba(255,255,255,.06);
  --shadow:rgba(0,0,0,.5);
  --shadow-strong:rgba(0,0,0,.62);
  --map-filter:grayscale(.25) brightness(.72) contrast(1.06);
  --img-filter:brightness(.93) contrast(1.03) saturate(.98);
}
/* No-JS fallback: follow system when no explicit choice is set */
@media (prefers-color-scheme: dark){
  :root:not([data-theme]){
    color-scheme: dark;
    --bg:#0d1218;
    --alt:#121a23;
    --surface:#16202b;
    --surface-2:#1c2833;
    --chip:rgba(96,168,235,.14);
    --text:#e7edf3;
    --muted:#94a3b2;
    --line:#22303c;
    --line-2:#2f3f4d;
    --accent:#5aa6ec;
    --accent-dark:#82bef2;
    --btn:#2f74b8;
    --btn-hover:#3d86cd;
    --header-bg:rgba(13,18,24,.82);
    --footer-bg:#090d12;
    --footer-text:#8c99a6;
    --footer-head:#e7edf3;
    --footer-muted:#68757f;
    --footer-line:rgba(255,255,255,.06);
    --shadow:rgba(0,0,0,.5);
    --shadow-strong:rgba(0,0,0,.62);
    --map-filter:grayscale(.25) brightness(.72) contrast(1.06);
    --img-filter:brightness(.93) contrast(1.03) saturate(.98);
  }
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;transition:background .3s ease,color .3s ease}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}

/* media */
.media{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--surface-2)}
.media img{width:100%;height:100%;object-fit:cover;display:block;filter:var(--img-filter)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.55rem;padding:.82rem 1.4rem;font-weight:600;font-size:.95rem;border-radius:6px;transition:.2s;border:1.5px solid transparent;cursor:pointer}
.btn .arw{transition:transform .2s}
.btn:hover .arw{transform:translateX(4px)}
.btn-primary{background:var(--btn);color:#fff}
.btn-primary:hover{background:var(--btn-hover);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.cta-row{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.9rem}

/* utility bar */
.util{background:var(--alt);border-bottom:1px solid var(--line);font-size:.85rem;color:var(--muted)}
.util .wrap{display:flex;justify-content:flex-end;align-items:center;height:40px;gap:1.4rem}
.util a{color:var(--muted)}
.util a:hover{color:var(--accent)}
.util .u-r{display:flex;gap:1.4rem}

/* header */
header{position:sticky;top:0;z-index:40;background:var(--header-bg);backdrop-filter:blur(9px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:74px}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand img{height:32px;width:auto;display:block}
.menu{display:flex;align-items:center;gap:1.2rem}
.menu a{font-size:.88rem;font-weight:500;color:var(--muted);white-space:nowrap;transition:color .18s}
.menu a:hover,.menu a.active{color:var(--text)}
.menu a.active{color:var(--accent)}
.menu a.cta{background:var(--btn);color:#fff;padding:.5rem 1rem;border-radius:6px}
.menu a.cta:hover{background:var(--btn-hover)}
.nav-actions{display:flex;align-items:center;gap:.5rem}
.theme-toggle,.flyer-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:8px;border:1px solid var(--line-2);background:var(--surface);color:var(--text);cursor:pointer;transition:.2s}
.theme-toggle:hover,.flyer-btn:hover{border-color:var(--accent);color:var(--accent)}
.theme-toggle svg,.flyer-btn svg{width:19px;height:19px}
.flyer-btn{position:relative}
.flyer-btn::after{
  content:"Firmenflyer (PDF)";
  position:absolute;top:calc(100% + 9px);left:50%;transform:translateX(-50%) translateY(-4px);
  background:var(--text);color:var(--bg);font-size:.72rem;font-weight:600;letter-spacing:.01em;
  padding:.4rem .65rem;border-radius:6px;white-space:nowrap;
  opacity:0;visibility:hidden;pointer-events:none;transition:opacity .16s ease,transform .16s ease;z-index:60;
}
.flyer-btn::before{
  content:"";position:absolute;top:100%;left:50%;transform:translateX(-50%);
  border:5px solid transparent;border-bottom-color:var(--text);margin-top:-1px;
  opacity:0;visibility:hidden;pointer-events:none;transition:opacity .16s ease;z-index:60;
}
.flyer-btn:hover::after,.flyer-btn:focus-visible::after{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.flyer-btn:hover::before,.flyer-btn:focus-visible::before{opacity:1;visibility:visible}
.theme-toggle .sun{display:none}
.theme-toggle .moon{display:block}
:root[data-theme="dark"] .theme-toggle .moon{display:none}
:root[data-theme="dark"] .theme-toggle .sun{display:block}
@media (prefers-color-scheme: dark){
  :root:not([data-theme]) .theme-toggle .moon{display:none}
  :root:not([data-theme]) .theme-toggle .sun{display:block}
}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:var(--text);transition:.25s;border-radius:2px}
@media(max-width:1080px){
  /* header has backdrop-filter, which makes it the containing block for
     position:fixed descendants -- so `top` below is relative to header's
     own box (i.e. its bottom edge), not the viewport. */
  .menu{position:fixed;top:100%;right:0;bottom:auto;left:0;background:var(--bg);flex-direction:column;align-items:stretch;gap:0;padding:4px var(--gutter) 22px;border-bottom:1px solid var(--line);box-shadow:0 18px 36px var(--shadow);transform:translateY(-150%);transition:transform .28s ease;max-height:calc(100vh - 114px);overflow:auto}
  .menu.open{transform:translateY(0)}
  .menu a{padding:14px 2px;border-bottom:1px solid var(--line);font-size:1rem}
  .menu a.cta{margin-top:14px;text-align:center;border-bottom:0}
  .burger{display:flex}
  .burger.on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger.on span:nth-child(2){opacity:0}
  .burger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* home hero (full-bleed background photo) */
.hero{
  position:relative;
  background:
    linear-gradient(100deg, rgba(7,13,22,.93) 0%, rgba(7,13,22,.78) 32%, rgba(7,13,22,.4) 62%, rgba(7,13,22,.12) 100%),
    url('cnc-fertigung.jpg') center 38% / cover no-repeat;
  border-bottom:1px solid var(--line);
}
.hero .wrap{padding:clamp(110px,17vw,200px) var(--gutter) clamp(84px,12vw,140px)}
.hero-inner{max-width:640px}
.hero .kicker{font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:#8fc3f0}
.hero h1{font-weight:700;font-size:clamp(2.3rem,5.6vw,3.8rem);letter-spacing:-.02em;line-height:1.06;margin-top:.9rem;color:#fff}
.hero .claim{margin-top:1.2rem;font-size:clamp(1.05rem,1.7vw,1.3rem);color:rgba(255,255,255,.88);max-width:46ch}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.hero .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.1)}
@media(max-width:640px){.hero{background-position:65% 38%}}

/* page hero (subpages) */
.phero{background:var(--alt);border-bottom:1px solid var(--line)}
.phero .wrap{padding:clamp(40px,6vw,72px) var(--gutter)}
.phero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(2rem,5vw,4rem);align-items:center}
@media(max-width:860px){.phero-grid{grid-template-columns:1fr;gap:1.8rem}}
.phero .crumb{font-size:.8rem;color:var(--muted);margin-bottom:1rem}
.phero .crumb a{color:var(--accent)}
.phero .kicker{font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.phero h1{font-weight:700;font-size:clamp(1.8rem,4vw,2.9rem);letter-spacing:-.02em;line-height:1.12;margin-top:.7rem;max-width:20ch}
.phero p{margin-top:1rem;color:var(--muted);font-size:clamp(1rem,1.5vw,1.16rem);max-width:58ch}
.phero-media{aspect-ratio:16/11}
@media(max-width:860px){.phero-media{aspect-ratio:16/9}}

/* sections */
.sec{padding:clamp(52px,7vw,90px) 0}
.sec-alt{background:var(--alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.head{text-align:center;max-width:58ch;margin:0 auto clamp(2rem,4vw,3rem)}
.head .kicker{font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.head h2{font-weight:700;font-size:clamp(1.5rem,3.2vw,2.2rem);letter-spacing:-.01em;margin-top:.7rem}
.head p{margin-top:.8rem;color:var(--muted)}

/* arbeitsbereiche — image cards */
.areas{display:grid;grid-template-columns:repeat(3,1fr);gap:1.3rem}
@media(max-width:900px){.areas{grid-template-columns:repeat(2,1fr)}}
@media(max-width:540px){.areas{grid-template-columns:1fr}}
.area{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:border-color .2s,box-shadow .2s,transform .2s}
.area:hover{border-color:var(--line-2);box-shadow:0 16px 34px var(--shadow);transform:translateY(-4px)}
.area-media{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.area-media img{width:100%;height:100%;object-fit:cover;filter:var(--img-filter);transition:transform .4s ease}
.area:hover .area-media img{transform:scale(1.04)}
.area-body{padding:1.4rem 1.4rem 1.5rem;display:flex;flex-direction:column;flex:1}
.area-body h3{font-weight:600;font-size:1.16rem;margin-bottom:.5rem}
.area-body p{color:var(--muted);font-size:.94rem;flex:1}
.area-body .more{margin-top:1.1rem;font-size:.86rem;font-weight:600;color:var(--accent);display:inline-flex;align-items:center;gap:.4rem;transition:gap .2s}
.area:hover .area-body .more{gap:.7rem}

/* statements */
.statements{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin-top:clamp(2rem,4vw,3rem)}
@media(max-width:720px){.statements{grid-template-columns:1fr}}
.statement{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;padding:1.3rem 1.5rem;color:var(--text);font-size:1.02rem;font-weight:500}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
@media(max-width:640px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1rem}
.stat .n{font-weight:700;font-size:clamp(2.4rem,6vw,3.3rem);line-height:1;color:var(--accent);letter-spacing:-.02em}
.stat .l{margin-top:.6rem;font-size:.92rem;font-weight:500;color:var(--muted)}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
@media(max-width:820px){.gallery{grid-template-columns:repeat(2,1fr)}}
@media(max-width:540px){.gallery{grid-template-columns:1fr}}
.gallery .media{aspect-ratio:1/1}
.gallery .media img{transition:transform .4s ease}
.gallery .media:hover img{transform:scale(1.05)}

/* service detail */
.svc-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,4rem);align-items:start}
@media(max-width:860px){.svc-grid{grid-template-columns:1fr;gap:2rem}}
.svc-lead{font-size:1.06rem;color:var(--muted)}
.svc-lead p{margin-bottom:1rem;max-width:58ch}
.svc-lead p strong{color:var(--text);font-weight:600}
.checks{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface);margin-top:1.5rem}
.checks .ck{display:flex;gap:.9rem;padding:1.05rem 1.4rem;border-bottom:1px solid var(--line)}
.checks .ck:last-child{border-bottom:0}
.checks .ck svg{width:20px;height:20px;color:var(--accent);flex:none;margin-top:2px}
.checks .ck span{font-size:.97rem;color:var(--text)}
.svc-media{aspect-ratio:4/3}

/* norms (management page) */
.norms{display:grid;grid-template-columns:repeat(2,1fr);gap:1.3rem}
@media(max-width:760px){.norms{grid-template-columns:1fr}}
.norm{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem 1.6rem 1.7rem;position:relative}
.norm .code{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.05em;color:var(--accent);background:var(--chip);padding:.3rem .6rem;border-radius:5px;margin-bottom:.9rem}
.norm h3{font-weight:600;font-size:1.14rem;margin-bottom:.5rem}
.norm p{color:var(--muted);font-size:.95rem}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(1.6rem,4vw,2.4rem)}
.panel .kicker{font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.panel h2{font-weight:700;font-size:clamp(1.4rem,3vw,2rem);letter-spacing:-.01em;margin:.7rem 0 .9rem}
.panel p{color:var(--muted);max-width:66ch;margin-bottom:.9rem}
.panel p:last-child{margin-bottom:0}
.panel p strong{color:var(--text);font-weight:600}

/* firma */
.firma-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2.2rem,5vw,4rem);align-items:center}
@media(max-width:880px){.firma-grid{grid-template-columns:1fr;gap:2.2rem}}
.prose p{color:var(--muted);font-size:1.05rem;margin-bottom:1.05rem;max-width:54ch}
.prose p strong{color:var(--text);font-weight:600}
.why{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.why .wi{display:flex;gap:1rem;padding:1.2rem 1.4rem;border-bottom:1px solid var(--line)}
.why .wi:last-child{border-bottom:0}
.why .wi .ck{color:var(--accent);font-weight:700;flex:none}
.why .wi h4{font-weight:600;font-size:1rem;margin-bottom:.15rem}
.why .wi p{color:var(--muted);font-size:.92rem}

/* jobs */
.jobs-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
@media(max-width:820px){.jobs-grid{grid-template-columns:1fr}}
.job{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.7rem;display:flex;flex-direction:column}
.job .jm{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:.7rem}
.job .jt{font-weight:600;font-size:1.12rem;margin-bottom:.4rem}
.job p{color:var(--muted);font-size:.94rem}

/* contact */
.k-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2.2rem,5vw,3.5rem);align-items:start}
@media(max-width:880px){.k-grid{grid-template-columns:1fr;gap:2.2rem}}
.info-block{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface);margin-bottom:1.5rem}
.info-block .ib{padding:1.1rem 1.4rem;border-bottom:1px solid var(--line)}
.info-block .ib:last-child{border-bottom:0}
.info-block .ib .k{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:.3rem}
.info-block .ib .v{font-size:1.02rem;font-weight:500}
.info-block .ib .v a{color:var(--accent)}
.map{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--alt)}
.map iframe{width:100%;height:260px;border:0;display:block;filter:var(--map-filter)}
.form{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(1.5rem,4vw,2.2rem)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:.9rem}
@media(max-width:520px){.form .row{grid-template-columns:1fr}}
.field{margin-bottom:1rem;display:flex;flex-direction:column}
.field label{font-size:.82rem;font-weight:600;margin-bottom:.4rem}
.field input,.field textarea{font-family:inherit;font-size:.97rem;color:var(--text);background:var(--bg);border:1px solid var(--line-2);border-radius:6px;padding:.7rem .8rem;transition:border-color .18s,box-shadow .18s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
.field textarea{resize:vertical;min-height:130px}
.form button{width:100%;justify-content:center;margin-top:.3rem}
.form .hint{margin-top:.9rem;font-size:.8rem;color:var(--muted)}

/* cta band */
.cta-band{background:var(--alt);border-top:1px solid var(--line)}
.cta-band .wrap{padding:clamp(44px,6vw,72px) var(--gutter);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1.4rem}
.cta-band h2{font-weight:700;font-size:clamp(1.4rem,3vw,2rem);letter-spacing:-.01em;max-width:24ch}
.cta-band p{color:var(--muted);margin-top:.4rem;max-width:50ch}

/* footer */
footer{background:var(--footer-bg);color:var(--footer-text);padding:2.8rem 0 2rem;border-top:1px solid var(--footer-line)}
.foot{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem}
@media(max-width:760px){.foot{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.foot{grid-template-columns:1fr}}
.foot .fb b{color:var(--footer-head);font-weight:600;font-size:1.05rem;display:block;margin-bottom:.5rem}
.foot .fb p{font-size:.9rem;line-height:1.55}
.foot .fcol h5{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--footer-muted);margin-bottom:.8rem}
.foot .fcol a{color:var(--footer-text);font-size:.9rem;display:block;margin-bottom:.5rem;transition:color .18s}
.foot .fcol a:hover{color:var(--footer-head)}
.foot-base{border-top:1px solid var(--footer-line);margin-top:1.9rem;padding-top:1.2rem;font-size:.82rem;color:var(--footer-muted)}

/* reveal */
.rv{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}