/* ==========================================================================
   OTOGAS — Design system
   Graphite workshop base + signal-orange / eco-moss accents (from the real
   DPF-machine colors), condensed industrial display type, hazard-stripe
   signature motif used sparingly as a section marker.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700;800&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@500;600&display=swap');

:root{
  --graphite-900:#14181A;
  --graphite-800:#1C2224;
  --graphite-700:#2A3134;
  --graphite-500:#5B6469;
  --graphite-300:#9AA3A6;
  --paper:#F1F0EA;
  --paper-dim:#E7E5DC;
  --white:#FFFFFF;
  --orange:#E35B14;
  --orange-dark:#B8460C;
  --moss:#3F6B34;
  --moss-light:#5C8A4C;
  --line: rgba(20,24,26,.12);
  --line-invert: rgba(255,255,255,.16);

  --display: "Barlow Condensed", sans-serif;
  --body: "Inter", sans-serif;
  --mono: "JetBrains Mono", monospace;

  --maxw: 1240px;
  --radius: 3px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--body);
  background:var(--paper);
  color:var(--graphite-800);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{font-family:var(--display);font-weight:700;line-height:1.05;margin:0;letter-spacing:.01em;}
p{margin:0;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.001ms !important; transition-duration:.001ms !important;}
}

/* focus */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:3px solid var(--orange);
  outline-offset:2px;
}

/* ---------- hazard stripe signature ---------- */
.stripe{
  height:10px;
  background:repeating-linear-gradient(
    -45deg,
    var(--orange) 0 18px,
    var(--graphite-900) 18px 36px
  );
}
.stripe--thin{height:6px;}

/* ---------- eyebrow / labels ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--orange-dark);
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:18px;height:2px;background:var(--orange);
  display:inline-block;
}

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:var(--graphite-900);
  color:var(--white);
  border-bottom:1px solid var(--line-invert);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:92px;
}
.brand{
  display:flex; align-items:center;
}
.brand__logo{
  height:72px;
  width:auto;
  display:block;
}

.nav{display:flex; align-items:center; gap:2px;}
.nav > ul{display:flex; align-items:stretch; gap:2px;}
.nav > ul > li{position:relative;}
.nav a.top-link{
  display:flex; align-items:center; gap:6px;
  height:92px; padding:0 16px;
  font-size:15px; font-weight:600;
  color:var(--paper-dim);
  border-bottom:3px solid transparent;
  transition:color .15s ease, border-color .15s ease;
  white-space:nowrap;
}
.nav a.top-link:hover, .nav li:hover > a.top-link, .nav li.open > a.top-link{
  color:var(--white);
  border-bottom-color:var(--orange);
}
.nav .caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-top:-4px;opacity:.8;}

.dropdown{
  position:absolute; left:0; top:100%;
  min-width:300px;
  background:var(--graphite-800);
  border:1px solid var(--line-invert);
  border-top:2px solid var(--orange);
  padding:8px;
  opacity:0; visibility:hidden; transform:translateY(6px);
  transition:opacity .15s ease, transform .15s ease, visibility .15s;
  box-shadow:0 18px 40px rgba(0,0,0,.35);
}
.nav li:hover .dropdown, .nav li.open .dropdown{
  opacity:1; visibility:visible; transform:translateY(0);
}
.dropdown a{
  display:block;
  padding:11px 14px;
  font-size:14.5px;
  color:var(--paper-dim);
  border-radius:2px;
}
.dropdown a:hover{background:var(--graphite-700); color:var(--white);}

.header-cta{
  display:flex; align-items:center; gap:18px;
}
.phone-link{
  font-family:var(--mono);
  font-size:14px;
  color:var(--white);
  display:flex; align-items:center; gap:8px;
}
.phone-link .dot{width:7px;height:7px;border-radius:50%;background:var(--moss-light);box-shadow:0 0 0 3px rgba(92,138,76,.25);}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:8px;
  font-family:var(--body);
  font-weight:700;
  font-size:14.5px;
  padding:13px 22px;
  border-radius:2px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .12s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn--orange{background:var(--orange); color:var(--white);}
.btn--orange:hover{background:var(--orange-dark);}
.btn--ghost{background:transparent; color:var(--white); border-color:var(--line-invert);}
.btn--ghost:hover{border-color:var(--orange); color:var(--orange);}
.btn--dark{background:var(--graphite-900); color:var(--white);}
.btn--dark:hover{background:var(--graphite-700);}

.nav-toggle{display:none;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  background:var(--graphite-900);
  color:var(--white);
  overflow:hidden;
}
.hero__bg{
  position:absolute; inset:0;
  background-image: linear-gradient(100deg, rgba(20,24,26,.94) 18%, rgba(20,24,26,.55) 55%, rgba(20,24,26,.85) 100%), var(--hero-img, none);
  background-size:cover;
  background-position:center;
}
.hero__inner{
  position:relative;
  padding:76px 0 64px;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:40px;
  align-items:end;
}
.hero h1{
  font-size:clamp(40px, 5.4vw, 68px);
  text-transform:uppercase;
  letter-spacing:.01em;
}
.hero h1 em{
  font-style:normal;
  color:var(--orange);
}
.hero__lede{
  margin-top:22px;
  max-width:56ch;
  font-size:17.5px;
  color:var(--paper-dim);
}
.hero__actions{
  margin-top:32px;
  display:flex; gap:14px; flex-wrap:wrap;
}
.hero__badge{
  border:1px solid var(--line-invert);
  padding:22px;
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--paper-dim);
  line-height:1.7;
  background:rgba(255,255,255,.03);
}
.hero__badge b{display:block; color:var(--white); font-size:15px; margin-bottom:6px; font-family:var(--body);}

/* ---------- stat strip ---------- */
.stats{
  background:var(--graphite-800);
  color:var(--white);
  border-top:1px solid var(--line-invert);
}
.stats .wrap{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.stat{
  padding:30px 24px;
  border-left:1px solid var(--line-invert);
}
.stat:first-child{border-left:none;}
.stat b{
  font-family:var(--display);
  font-size:44px;
  font-weight:800;
  color:var(--orange);
  display:block;
  line-height:1;
}
.stat span{
  display:block;
  margin-top:8px;
  font-size:13px;
  color:var(--graphite-300);
  text-transform:uppercase;
  letter-spacing:.06em;
}

/* ---------- sections ---------- */
section{padding:88px 0;}
.section-head{
  display:flex; justify-content:space-between; align-items:end; gap:32px;
  margin-bottom:48px;
}
.section-head h2{font-size:clamp(30px,3.6vw,44px); text-transform:uppercase;}
.section-head p{max-width:46ch; color:var(--graphite-500); font-size:15.5px;}

.bg-dark{background:var(--graphite-900); color:var(--white);}
.bg-dark .section-head p{color:var(--graphite-300);}
.bg-dim{background:var(--paper-dim);}

/* services grid */
.services{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.service-card{
  background:var(--paper);
  padding:30px 22px;
  display:flex; flex-direction:column; gap:14px;
  transition:background .18s ease;
}
.service-card:hover{background:var(--white);}
.service-card .num{
  font-family:var(--mono);
  font-size:12px;
  color:var(--orange-dark);
}
.service-card h3{
  font-size:22px;
  text-transform:uppercase;
  line-height:1.1;
}
.service-card p{
  font-size:14px;
  color:var(--graphite-500);
  flex:1;
}
.service-card .go{
  font-size:13px;
  font-weight:700;
  color:var(--graphite-800);
  display:flex; align-items:center; gap:6px;
}
.service-card:hover .go{color:var(--orange);}

/* ecology split */
.eco{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:64px;
  align-items:center;
}
.eco__art{
  aspect-ratio:4/5;
  background:var(--graphite-800) url(../img/dpf-filter-cist.jpg) center/cover;
  position:relative;
  border:1px solid var(--line-invert);
}
.eco__art::after{
  content:"ČIST DPF";
  position:absolute; left:16px; bottom:16px;
  font-family:var(--mono); font-size:11px; letter-spacing:.1em;
  background:var(--graphite-900); color:var(--moss-light);
  padding:6px 10px; text-transform:uppercase;
}
.eco h2{font-size:clamp(28px,3.4vw,40px); text-transform:uppercase; margin-bottom:20px;}
.eco p{color:var(--graphite-500); font-size:16px; margin-bottom:16px; max-width:58ch;}
.eco-points{margin-top:24px; display:grid; gap:14px;}
.eco-points li{
  display:flex; gap:14px; align-items:flex-start;
  font-size:14.5px; color:var(--graphite-700);
}
.eco-points b{
  color:var(--moss);
  font-family:var(--mono);
}

/* partners */
.partners-band{
  background:var(--paper-dim);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:40px 0;
}
.partners-band .label{
  font-family:var(--mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase;
  color:var(--graphite-500); margin-bottom:18px;
}
.partner-row{
  display:flex; flex-wrap:wrap; gap:12px 28px;
}
.partner-row span{
  font-family:var(--display);
  font-weight:700;
  font-size:19px;
  color:var(--graphite-700);
  letter-spacing:.01em;
}

/* gallery strip */
.filmstrip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:12px;
}
.filmstrip a{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  display:block;
  border:1px solid var(--line);
}
.filmstrip img{width:100%;height:100%;object-fit:cover; transition:transform .35s ease;}
.filmstrip a:hover img{transform:scale(1.06);}
.filmstrip .cap{
  position:absolute; left:0; right:0; bottom:0;
  background:linear-gradient(0deg, rgba(20,24,26,.92), transparent);
  color:var(--white);
  font-size:12.5px;
  padding:26px 12px 10px;
  font-family:var(--mono);
}

/* CTA band */
.cta-band{
  background:var(--graphite-900);
  color:var(--white);
  position:relative;
}
.cta-band .wrap{
  padding:64px 24px;
  display:flex; justify-content:space-between; align-items:center; gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(26px,3.2vw,36px); text-transform:uppercase; max-width:16ch;}
.cta-band .actions{display:flex; gap:14px; flex-wrap:wrap;}

/* footer */
footer{
  background:var(--graphite-900);
  color:var(--graphite-300);
  padding:64px 0 28px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line-invert);
}
.footer-grid h4{
  color:var(--white); font-family:var(--body); font-size:13px;
  text-transform:uppercase; letter-spacing:.08em; margin-bottom:18px;
}
.footer-grid ul{display:grid; gap:10px;}
.footer-grid a:hover{color:var(--white);}
.footer-brand{font-family:var(--display); font-weight:800; font-size:26px; color:var(--white);}
.footer-bottom{
  padding-top:24px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  font-size:12.5px;
}

/* ---------- inner page header ---------- */
.page-header{
  background:var(--graphite-900);
  color:var(--white);
  padding:56px 0 48px;
  position:relative;
}
.breadcrumb{
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--graphite-300);
  margin-bottom:18px;
  display:flex; gap:8px; align-items:center;
}
.breadcrumb a:hover{color:var(--orange);}
.page-header h1{
  font-size:clamp(34px,4.6vw,54px);
  text-transform:uppercase;
  max-width:20ch;
}
.page-header__lede{
  margin-top:18px;
  max-width:60ch;
  color:var(--paper-dim);
  font-size:16.5px;
}

/* ---------- content rows (alternating image/text) ---------- */
.row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.row.reverse .row__art{order:2;}
.row.reverse .row__text{order:1;}
.row__art{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  border:1px solid var(--line);
}
.row__art img{width:100%;height:100%;object-fit:cover;}
.row__text h3{
  font-size:clamp(26px,3vw,34px);
  text-transform:uppercase;
  margin-bottom:16px;
}
.row__text p{color:var(--graphite-500); font-size:15.5px; margin-bottom:14px;}
.check-list{margin-top:18px; display:grid; gap:10px;}
.check-list li{
  display:flex; gap:10px; align-items:flex-start;
  font-size:14.5px; color:var(--graphite-700);
}
.check-list li::before{
  content:"";
  min-width:9px; height:9px; margin-top:5px;
  background:var(--orange);
}
.section-divider{
  border:0; border-top:1px solid var(--line);
  margin:0;
}

/* value / checklist grid */
.value-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line-invert);
  border:1px solid var(--line-invert);
}
.value-card{
  background:var(--graphite-900);
  padding:28px 24px;
  color:var(--white);
}
.value-card .n{font-family:var(--mono); color:var(--orange); font-size:13px;}
.value-card p{margin-top:10px; font-size:14.5px; color:var(--paper-dim);}

/* quote / mission callout */
.quote-block{
  border-left:4px solid var(--orange);
  padding:8px 0 8px 28px;
  font-family:var(--display);
  font-size:clamp(22px,2.6vw,30px);
  font-weight:600;
  line-height:1.3;
  max-width:44ch;
}

/* faq / accordion (used on atesti page) */
.acc-item{border-bottom:1px solid var(--line);}
.acc-item__q{
  display:flex; justify-content:space-between; align-items:center;
  padding:22px 4px;
  cursor:pointer;
  font-family:var(--body); font-weight:700; font-size:16px;
}
.acc-item__q .plus{
  width:18px;height:18px;position:relative; flex:none;
}
.acc-item__q .plus::before,.acc-item__q .plus::after{
  content:""; position:absolute; background:var(--orange); transition:transform .2s ease;
}
.acc-item__q .plus::before{left:0;top:8px;width:18px;height:2px;}
.acc-item__q .plus::after{left:8px;top:0;width:2px;height:18px;}
.acc-item.open .plus::after{transform:rotate(90deg); opacity:0;}
.acc-item__a{
  max-height:0; overflow:hidden;
  transition:max-height .25s ease;
  color:var(--graphite-500); font-size:14.5px;
}
.acc-item__a-inner{padding:0 4px 22px;}
.acc-item.open .acc-item__a{max-height:600px;}
.doc-list{margin-top:10px; display:grid; gap:8px;}
.doc-list li{font-size:14px; color:var(--graphite-500); display:flex; gap:10px;}
.doc-list li::before{content:"—"; color:var(--orange-dark);}

/* simple table */
table.spec{width:100%; border-collapse:collapse; font-size:14px;}
table.spec th, table.spec td{ text-align:left; padding:12px 14px; border-bottom:1px solid var(--line); }
table.spec th{ font-family:var(--mono); text-transform:uppercase; font-size:11.5px; letter-spacing:.06em; color:var(--graphite-500); }

/* responsive */
@media (max-width:1080px){
  .row{grid-template-columns:1fr; gap:28px;}
  .row.reverse .row__art{order:1;}
  .row.reverse .row__text{order:2;}
  .value-grid{grid-template-columns:1fr;}
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .services{grid-template-columns:repeat(2,1fr);}
  .hero__inner{grid-template-columns:1fr;}
  .hero__badge{max-width:480px;}
  .stats .wrap{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(3){border-left:none;}
  .eco{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .filmstrip{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .nav{position:fixed; inset:76px 0 0 0; background:var(--graphite-900); flex-direction:column; align-items:stretch; padding:16px; display:none; overflow:auto;}
  .nav.open{display:flex;}
  .nav > ul{flex-direction:column; width:100%;}
  .nav a.top-link{height:auto; padding:16px 8px; border-bottom:1px solid var(--line-invert);}
  .dropdown{position:static; opacity:1; visibility:visible; transform:none; display:none; border:none; background:var(--graphite-800); margin:0 0 8px;}
  .nav li.open .dropdown{display:block;}
  .header-cta .phone-link{display:none;}
  .nav-toggle{
    display:flex; flex-direction:column; gap:5px; justify-content:center;
    width:40px; height:40px; background:transparent; border:1px solid var(--line-invert);
  }
  .nav-toggle span{width:20px; height:2px; background:var(--white); margin:0 auto;}
  .services{grid-template-columns:1fr;}
}
@media (max-width:600px){
  .stats .wrap{grid-template-columns:1fr 1fr;}
  .stat{border-left:none; border-top:1px solid var(--line-invert);}
  .stat:nth-child(1),.stat:nth-child(2){border-top:none;}
  .footer-grid{grid-template-columns:1fr;}
}