/* NEOGAS Engineering — design system. Single committed look (light industrial). */
:root{
  --ink:#101820; --ink-2:#2B3640; --muted:#5B6770;
  --petrol:#0E4D5B; --petrol-deep:#083640; --petrol-ink:#052229;
  --amber:#F2A900; --amber-deep:#C98700;
  --paper:#F4F6F5; --white:#FFFFFF; --line:#DCE3E1; --line-2:#C9D2CF;
  --ok:#1E8E5A; --err:#C23B3B;
  --radius:14px; --radius-s:8px;
  --shadow:0 1px 2px rgba(16,24,32,.06),0 8px 24px rgba(16,24,32,.06);
  --font-head:"Manrope","Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.6}
img,svg{max-width:100%;display:block}
a{color:var(--petrol);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(2rem,4.2vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.6rem,2.8vw,2.3rem);font-weight:800}
h3{font-size:1.2rem;font-weight:700}
p{margin:0 0 1em}
.container{width:min(1200px,calc(100% - 40px));margin-inline:auto}
.kicker{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--amber-deep);margin-bottom:.9rem;display:inline-flex;align-items:center;gap:.6rem}
.kicker::before{content:"";width:22px;height:2px;background:var(--amber)}
.lead{font-size:1.15rem;color:var(--ink-2);max-width:62ch}
.section{padding:clamp(56px,7vw,96px) 0}
.section--tight{padding:clamp(36px,5vw,64px) 0}
.section--white{background:var(--white)}
.section--dark{background:var(--petrol-ink);color:#DDE7E5}
.section--dark h2,.section--dark h3{color:#fff}
.section--dark .kicker{color:var(--amber)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.section-head .lead{margin:0}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:980px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.55rem;padding:.8rem 1.35rem;border-radius:999px;font-weight:700;font-family:var(--font-head);font-size:.95rem;border:2px solid transparent;cursor:pointer;transition:transform .15s,background .15s,border-color .15s;white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--amber{background:var(--amber);color:var(--ink);border-color:var(--amber)}
.btn--amber:hover{background:#FFB61A}
.btn--ghost{background:transparent;color:var(--petrol);border-color:var(--line-2)}
.btn--ghost:hover{border-color:var(--petrol)}
.section--dark .btn--ghost,.hero .btn--ghost{color:#fff;border-color:rgba(255,255,255,.35)}
.section--dark .btn--ghost:hover,.hero .btn--ghost:hover{border-color:#fff}
.btn svg{width:18px;height:18px}

/* Header */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__in{display:flex;align-items:center;gap:28px;min-height:72px}
.logo{display:flex;align-items:center;gap:12px;color:var(--ink);font-family:var(--font-head);font-weight:800;font-size:1.15rem;letter-spacing:-.01em}
.logo:hover{text-decoration:none}
.logo svg{width:40px;height:40px;flex:none}
.logo small{display:block;font-weight:500;font-size:.68rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-top:1px}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{white-space:nowrap;padding:.55rem .85rem;border-radius:999px;color:var(--ink-2);font-weight:600;font-size:.95rem}
.nav a:hover,.nav a[aria-current="page"]{background:var(--paper);color:var(--petrol);text-decoration:none}
.lang{display:flex;gap:2px;border:1px solid var(--line);border-radius:999px;padding:3px}
.lang a{padding:.3rem .6rem;border-radius:999px;font-size:.78rem;font-weight:700;color:var(--muted);letter-spacing:.04em}
.lang a[aria-current="true"]{background:var(--petrol);color:#fff}
.lang a:hover{text-decoration:none;color:var(--petrol)}
.lang a[aria-current="true"]:hover{color:#fff}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;cursor:pointer;align-items:center;justify-content:center}
.burger span{display:block;width:20px;height:2px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink)}
.burger span::before{top:-6px}.burger span::after{top:6px}
@media (max-width:980px){
  .nav{display:none;position:absolute;left:0;right:0;top:72px;background:#fff;flex-direction:column;padding:12px 20px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.is-open{display:flex}
  .burger{display:flex}
  .header__cta{display:none}
  .lang{margin-left:auto}
  .burger{margin-left:0}
}

/* Hero */
.hero{background:linear-gradient(100deg,rgba(5,34,41,.97) 0%,rgba(5,34,41,.86) 42%,rgba(5,34,41,.58) 100%),url(/assets/img/hero.jpg) center/cover no-repeat;color:#E6EEEC;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,34,41,.35),transparent 30%,transparent 70%,rgba(5,34,41,.6))}
.hero__in{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:clamp(56px,8vw,110px) 0}
.hero h1{color:#fff;margin-bottom:1rem}
.hero .lead{color:#C7D6D3;font-size:1.12rem}
.hero__points{list-style:none;padding:0;margin:1.4rem 0 2rem;display:grid;gap:.6rem}
.hero__points li{display:flex;gap:.7rem;align-items:flex-start;color:#DDE7E5}
.hero__points svg{width:20px;height:20px;flex:none;margin-top:3px;color:var(--amber)}
.hero__actions{display:flex;gap:12px;flex-wrap:wrap}
.hero .kicker{color:var(--amber)}
.diagram{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:22px;backdrop-filter:blur(4px)}
.diagram__title{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:#9FB3AF;margin-bottom:12px}
.diagram svg{width:100%;height:auto}
.flow-line{stroke:#2F6E7C;stroke-width:6;fill:none;stroke-linecap:round}
.flow-dash{stroke:var(--amber);stroke-width:3;fill:none;stroke-dasharray:10 16;stroke-linecap:round;animation:flow 2.4s linear infinite}
@keyframes flow{to{stroke-dashoffset:-52}}
.node-box{fill:#0E4D5B;stroke:#3C8494;stroke-width:1.5}
.node-icon{stroke:#F2A900;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.node-label{fill:#E6EEEC;font-family:var(--font-head);font-weight:700;font-size:11.5px;text-anchor:middle}
.node-end{fill:#9FB3AF;font-family:var(--font-mono);font-size:9.5px;text-anchor:middle}
@media (max-width:980px){.hero__in{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){.flow-dash{animation:none}}

/* Facts */
.facts{background:var(--white);border-bottom:1px solid var(--line)}
.facts__in{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.fact{padding:28px 24px;border-left:1px solid var(--line)}
.fact:first-child{border-left:0}
.fact__n{font-family:var(--font-head);font-weight:800;font-size:1.7rem;color:var(--petrol);letter-spacing:-.02em;line-height:1.1}
.fact__n small{font-size:.85rem;font-weight:600;color:var(--muted);margin-left:.3rem}
.fact__t{color:var(--muted);font-size:.9rem;margin-top:.35rem}
@media (max-width:980px){.facts__in{grid-template-columns:repeat(2,1fr)}.fact:nth-child(3){border-left:0}.fact{border-top:1px solid var(--line)}.fact:nth-child(-n+2){border-top:0}}
@media (max-width:560px){.facts__in{grid-template-columns:1fr}.fact{border-left:0;border-top:1px solid var(--line)}.fact:first-child{border-top:0}}

/* Cards */
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:10px;transition:border-color .15s,box-shadow .15s,transform .15s;position:relative}
a.card{color:inherit}
a.card:hover{text-decoration:none;border-color:var(--petrol);box-shadow:var(--shadow);transform:translateY(-2px)}
.card__icon{width:52px;height:52px;border-radius:12px;background:var(--paper);display:grid;place-items:center;color:var(--petrol);margin-bottom:6px}
.card__icon svg{width:30px;height:30px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card__kicker{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--amber-deep)}
.card h3{margin:0;font-size:1.08rem}
.card p{margin:0;color:var(--muted);font-size:.95rem;flex:1}
.card__more{font-weight:700;color:var(--petrol);display:inline-flex;align-items:center;gap:.4rem;font-size:.92rem;margin-top:4px}
.card__more svg{width:16px;height:16px;transition:transform .15s}
a.card:hover .card__more svg{transform:translateX(3px)}
.card--num{padding-top:20px}
.card--num .num{font-family:var(--font-head);font-weight:800;font-size:2rem;color:var(--line-2);line-height:1}
.section--dark .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.12);color:#DDE7E5}
.section--dark .card p{color:#AFC0BC}
.section--dark .card__icon{background:rgba(255,255,255,.06);color:var(--amber)}

/* Systems list */
.syslist{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--white)}
.syslist li{padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.syslist li:nth-child(3n){border-right:0}
.syslist li:nth-last-child(-n+3){border-bottom:0}
.syslist .n{font-family:var(--font-mono);color:var(--amber-deep);font-size:.78rem;letter-spacing:.1em;margin-bottom:8px}
.syslist h3{font-size:1rem;margin:0 0 .4rem}
.syslist p{color:var(--muted);font-size:.92rem;margin:0}
@media (max-width:980px){.syslist{grid-template-columns:repeat(2,1fr)}.syslist li:nth-child(3n){border-right:1px solid var(--line)}.syslist li:nth-child(2n){border-right:0}.syslist li:nth-last-child(-n+3){border-bottom:1px solid var(--line)}.syslist li:nth-last-child(-n+2){border-bottom:0}}
@media (max-width:640px){.syslist{grid-template-columns:1fr}.syslist li{border-right:0!important;border-bottom:1px solid var(--line)!important}.syslist li:last-child{border-bottom:0!important}}

/* Steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px 24px 24px 24px;position:relative}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--font-mono);color:var(--amber-deep);font-size:.8rem;letter-spacing:.12em;display:block;margin-bottom:10px}
.step h3{font-size:1.05rem}
.step p{margin:0;color:var(--muted);font-size:.95rem}
@media (max-width:980px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.steps{grid-template-columns:1fr}}

/* Permits */
.permits{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.permits ul{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.permits li{display:flex;gap:12px;align-items:flex-start;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-s);padding:14px 16px}
.permits li svg{width:22px;height:22px;flex:none;color:var(--amber)}
@media (max-width:980px){.permits{grid-template-columns:1fr}}

/* Page header */
.page-head{background:var(--white);border-bottom:1px solid var(--line);padding:clamp(36px,5vw,64px) 0}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:14px;display:flex;gap:.5rem;flex-wrap:wrap}
.crumbs a{color:var(--muted)}
.crumbs span::before{content:"/";margin-right:.5rem;color:var(--line-2)}
.badge{display:inline-flex;align-items:center;gap:.4rem;background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:.35rem .8rem;font-size:.8rem;color:var(--ink-2);font-weight:600}
.badge svg{width:14px;height:14px;color:var(--petrol)}
.page-head .lead{margin-top:.5rem}

/* Product page */
.prod-layout{display:grid;grid-template-columns:1.4fr .8fr;gap:32px;align-items:start}
.prod-intro p{font-size:1.05rem;color:var(--ink-2)}
.aside{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:sticky;top:92px}
.aside h3{font-size:1rem;margin-bottom:.8rem}
.aside ul{margin:0;padding:0;list-style:none;display:grid;gap:.5rem}
.aside li{display:flex;gap:.6rem;align-items:flex-start;font-size:.93rem;color:var(--ink-2)}
.aside li svg,.checks li svg{width:18px;height:18px;flex:none;color:var(--amber-deep);margin-top:3px}
.aside .btn{margin-top:16px;width:100%;justify-content:center}
@media (max-width:980px){.prod-layout{grid-template-columns:1fr}.aside{position:static}}
.checks{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:12px 24px}
.checks li{display:flex;gap:.7rem;align-items:flex-start;color:var(--ink-2)}
@media (max-width:640px){.checks{grid-template-columns:1fr}}
.specs{display:grid;gap:28px}
.spec-table{width:100%;border-collapse:collapse;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:.93rem}
.spec-wrap{overflow-x:auto;border-radius:var(--radius)}
.spec-table caption{text-align:left;font-family:var(--font-head);font-weight:700;font-size:1.05rem;padding:0 0 10px}
.spec-table th,.spec-table td{padding:11px 14px;border-top:1px solid var(--line);vertical-align:top;text-align:left}
.spec-table thead th{background:var(--paper);border-top:0;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:600}
.spec-table td:nth-child(1){width:38%;color:var(--ink-2)}
.spec-table td:nth-child(2){width:12%;font-family:var(--font-mono);font-size:.82rem;color:var(--muted);white-space:nowrap}
.spec-table td:nth-child(3){font-weight:500}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{background:var(--white);border:1px solid var(--line);border-radius:999px;padding:.4rem .9rem;font-size:.9rem;color:var(--ink-2)}

/* Filters */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.filters button{background:var(--white);border:1px solid var(--line);border-radius:999px;padding:.45rem 1rem;font:inherit;font-size:.9rem;font-weight:600;color:var(--ink-2);cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--petrol);border-color:var(--petrol);color:#fff}
.card[hidden]{display:none}

/* Form */
.request{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start}
@media (max-width:980px){.request{grid-template-columns:1fr}}
.form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;display:grid;gap:14px;grid-template-columns:1fr 1fr}
.form .full{grid-column:1/-1}
.field{display:grid;gap:6px}
.field label{font-size:.82rem;font-weight:600;color:var(--ink-2)}
.field input,.field select,.field textarea{font:inherit;font-size:.95rem;padding:.7rem .85rem;border:1px solid var(--line-2);border-radius:var(--radius-s);background:#fff;color:var(--ink);width:100%}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--amber);outline-offset:1px;border-color:var(--amber)}
.field textarea{min-height:120px;resize:vertical}
.form__note{font-size:.78rem;color:var(--muted);margin:0}
.form__msg{grid-column:1/-1;padding:12px 14px;border-radius:var(--radius-s);font-size:.93rem}
.form__msg--ok{background:#E8F5EE;color:var(--ok);border:1px solid #BFE3CE}
.form__msg--err{background:#FBE9E9;color:var(--err);border:1px solid #F0C4C4}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}
@media (max-width:640px){.form{grid-template-columns:1fr}}

/* Contacts */
.contact-list{display:grid;gap:18px}
.contact-item{display:flex;gap:14px;align-items:flex-start}
.contact-item svg{width:22px;height:22px;color:var(--petrol);flex:none;margin-top:2px}
.contact-item b{display:block;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600;margin-bottom:2px}
.contact-item a{font-weight:600;font-size:1.05rem}
.map{border:0;width:100%;height:360px;border-radius:var(--radius);margin-top:32px;background:var(--line)}

/* Footer */
.footer{background:var(--petrol-ink);color:#AFC0BC;padding:56px 0 28px;font-size:.92rem}
.footer a{color:#DDE7E5}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer h4{color:#fff;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.footer .logo{color:#fff}
.footer .logo small{color:#9FB3AF}
.footer__bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.82rem;color:#7F9490}
@media (max-width:980px){.footer__grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer__grid{grid-template-columns:1fr}}

/* Reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* 404 */
.nf{text-align:center;padding:120px 0}
.nf h1{font-size:6rem;color:var(--line-2);margin:0}

/* Mobile overflow fixes */
h1,h2,h3{overflow-wrap:break-word}
@media (max-width:980px){.hero__in{grid-template-columns:minmax(0,1fr)}.header__in{gap:12px}.logo{min-width:0}}
@media (max-width:560px){h1{font-size:1.75rem}.logo small{display:none}.logo{font-size:1.05rem}.container{width:calc(100% - 32px)}}
@media (max-width:980px){.prod-layout,.request,.permits{grid-template-columns:minmax(0,1fr)}.prod-intro,.specs,.spec-wrap{min-width:0;max-width:100%}}
.prod-layout>*{min-width:0}
.specs{grid-template-columns:minmax(0,1fr)}.specs>div{min-width:0}
@media (max-width:640px){.spec-table td:nth-child(2){white-space:normal}.spec-table td:nth-child(1){width:42%}.spec-table th,.spec-table td{padding:9px 10px}}

/* Photo blocks */
.why{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:stretch}
.why__photo{border-radius:var(--radius);overflow:hidden;min-height:420px;position:relative;background:var(--line)}
.why__photo img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.why__photo figcaption{position:absolute;left:0;right:0;bottom:0;padding:18px 20px;background:linear-gradient(transparent,rgba(5,34,41,.85));color:#fff;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase}
.why .grid{gap:16px}
@media (max-width:980px){.why{grid-template-columns:minmax(0,1fr)}.why__photo{min-height:260px}}
.section--photo{background:linear-gradient(90deg,rgba(5,34,41,.96) 0%,rgba(5,34,41,.9) 50%,rgba(5,34,41,.72) 100%),url(/assets/img/permits.jpg) center/cover no-repeat}