/* DINAK Air Separation — design tokens per DESIGN.md */
:root{
  --ink:#0F172A; --body:#334155; --muted:#64748B; --line:#E2E8F0;
  --bg:#FFFFFF; --surface:#F1F5F9; --surface2:#E8EEF4;
  --navy:#0B3A5C; --navy-deep:#072A45; --blue:#0E6BA8; --accent:#E8730C;
  --accent-dark:#C55F06; --cryo:#7FD1E8;
  --font-head:"Archivo",system-ui,sans-serif; --font-body:"Source Sans 3",system-ui,sans-serif;
  --container:1200px; --radius:10px;
  --ease-out:cubic-bezier(.22,.61,.36,1);
  --shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px -12px rgba(15,23,42,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html.js [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .5s var(--ease-out),transform .5s var(--ease-out)}
html.js [data-reveal].in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){html.js [data-reveal]{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}
body{margin:0;font:400 1.0625rem/1.7 var(--font-body);color:var(--body);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--ink);line-height:1.2;margin:0 0 .6em}
h1{font-size:clamp(2rem,4.5vw,3.25rem);font-weight:800}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700}
h3{font-size:1.3rem;font-weight:700}
p{margin:0 0 1.1em}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
section.section{padding:88px 0}
section.section--tight{padding:56px 0}
.section--surface{background:var(--surface)}
.section--muted{background:var(--surface2)}
.section--dark{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-deep) 100%);color:#DCE7F0}
.section--dark h2,.section--dark h3{color:#fff}
.eyebrow{font-family:var(--font-head);font-weight:700;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:10px}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.lead{font-size:1.15rem;color:var(--muted)}
.section--dark .lead{color:#B8CCDC}
/* topbar */
.topbar{background:var(--navy-deep);color:#C7D8E4;font-size:.88rem}
.topbar .container{display:flex;gap:22px;justify-content:flex-end;align-items:center;padding-top:7px;padding-bottom:7px}
.topbar a{color:#E8F2F8}
.topbar a:hover{color:var(--cryo)}
.topbar .tb-mail,.topbar .tb-tel{white-space:nowrap}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;gap:28px;padding:14px 24px;max-width:1280px;margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:800;font-size:1.35rem;color:var(--navy)}
.logo .mark{width:38px;height:38px;border-radius:8px;background:linear-gradient(135deg,var(--navy) 0%,var(--blue) 70%);color:#fff;display:grid;place-items:center;font-size:.9rem;letter-spacing:.02em}
.logo span b{color:var(--accent)}
.main-nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.main-nav>li{list-style:none;position:relative}
.main-nav a{display:block;padding:10px 13px;font-family:var(--font-head);font-weight:600;font-size:.95rem;color:var(--ink)}
.main-nav a:hover,.main-nav a[aria-current]{color:var(--blue)}
.has-drop>a::after{content:"▾";margin-left:5px;font-size:.7em;color:var(--muted)}
.drop{position:absolute;top:100%;left:0;min-width:260px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:8px;display:none;z-index:60}
.has-drop:hover .drop,.has-drop:focus-within .drop{display:block}
.drop a{font-size:.9rem;padding:8px 12px;border-radius:6px}
.drop a:hover{background:var(--surface)}
.drop .drop-label{font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:8px 12px 4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-head);font-weight:700;border-radius:8px;padding:12px 22px;transition:transform .2s var(--ease-out),background .2s,box-shadow .2s;border:2px solid transparent;cursor:pointer}
.btn:active{transform:scale(.97)}
.btn-cta{background:var(--accent);color:#fff !important}
.btn-cta:hover{background:var(--accent-dark)}
.btn-ghost{border-color:var(--navy);color:var(--navy) !important;background:transparent}
.btn-ghost:hover{background:var(--navy);color:#fff !important}
.btn-wa{background:#25D366;color:#fff !important}
.btn-wa:hover{background:#1EBE5A}
.btn-nav{padding:9px 16px;font-size:.92rem}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:9px 12px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0}
@media (max-width:980px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;border-bottom:1px solid var(--line);padding:12px;gap:2px}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .nav-cta{display:none}
  .drop{position:static;box-shadow:none;border:none;display:block;padding-left:14px;min-width:0}
  .has-drop>a::after{content:""}
}
/* hero */
.hero{position:relative;background:linear-gradient(120deg,var(--navy-deep) 0%,var(--navy) 55%,#12507c 100%);color:#EAF3FA;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:
  radial-gradient(680px 320px at 88% 18%,rgba(127,209,232,.14),transparent 65%),
  repeating-linear-gradient(115deg,transparent 0 120px,rgba(255,255,255,.028) 120px 122px);pointer-events:none}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;padding-top:96px;padding-bottom:96px;position:relative;z-index:1}
.hero h1{color:#fff}
.hero .lead{color:#C3D6E4}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero-media img{border-radius:14px;box-shadow:0 24px 60px -20px rgba(0,0,0,.55)}
.hero-badges{display:flex;gap:20px;flex-wrap:wrap;margin-top:34px;font-size:.9rem;color:#AFC7D8}
.hero-badges span{display:flex;align-items:center;gap:8px}
.hero-badges svg{width:16px;height:16px;fill:var(--cryo)}
@media (max-width:980px){.hero .container{grid-template-columns:1fr;padding-top:64px;padding-bottom:64px}}
/* page hero (inner pages) */
.page-hero{background:linear-gradient(120deg,var(--navy-deep),var(--navy));color:#DCE7F0;padding:64px 0}
.page-hero h1{color:#fff;margin-bottom:.3em}
.page-hero p{max-width:760px}
.crumbs{font-size:.86rem;margin-bottom:14px;color:#9FB7C9}
.crumbs a{color:#C7D8E4}.crumbs a:hover{color:var(--cryo)}
/* stats */
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:28px;text-align:center}
.stat b{display:block;font-family:var(--font-head);font-weight:800;font-size:2.3rem;color:var(--navy)}
.section--dark .stat b{color:var(--cryo)}
.stat span{font-size:.95rem;color:var(--muted)}
.section--dark .stat span{color:#AFC7D8}
@media (max-width:900px){.stats{grid-template-columns:repeat(2,1fr)}}
/* cards */
.grid{display:grid;gap:28px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media (max-width:1024px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g3,.g4,.g2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s var(--ease-out),box-shadow .2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card .thumb{aspect-ratio:4/3;overflow:hidden;background:var(--surface)}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease-out)}
.card:hover .thumb img{transform:scale(1.04)}
.card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{font-size:1.08rem;margin:0}
.card h3 a{color:var(--ink)}
.card h3 a:hover{color:var(--blue)}
.card p{font-size:.95rem;color:var(--muted);margin:0;flex:1}
.card .more{font-family:var(--font-head);font-weight:700;font-size:.9rem;color:var(--accent)}
.icard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:transform .2s var(--ease-out),box-shadow .2s}
.icard:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.icard .ico{width:46px;height:46px;border-radius:10px;background:rgba(14,107,168,.1);display:grid;place-items:center;margin-bottom:16px}
.icard .ico svg{width:24px;height:24px;stroke:var(--blue);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.icard h3{font-size:1.05rem}
.icard p{font-size:.94rem;color:var(--muted);margin:0}
/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.rev .media{order:2}
.split .media img{border-radius:14px;box-shadow:var(--shadow);width:100%}
@media (max-width:900px){.split{grid-template-columns:1fr}.split.rev .media{order:0}}
.checklist{list-style:none;padding:0;margin:18px 0}
.checklist li{position:relative;padding:6px 0 6px 30px}
.checklist li::before{content:"";position:absolute;left:0;top:12px;width:18px;height:18px;background:no-repeat url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23E8730C"><path d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z"/></svg>')}
/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;position:relative}
.step::before{counter-increment:s;content:counter(s,decimal-leading-zero);font-family:var(--font-head);font-weight:800;font-size:2rem;color:var(--surface2);position:absolute;top:14px;right:18px}
.step h3{font-size:1.02rem;position:relative;z-index:1}
.step p{font-size:.93rem;color:var(--muted);margin:0}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}
/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
table{border-collapse:collapse;width:100%;font-size:.93rem;min-width:640px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:var(--navy);color:#fff;font-family:var(--font-head);font-weight:600;white-space:nowrap;border-bottom:none}
tbody tr:nth-child(even){background:var(--surface)}
tbody tr:last-child td{border-bottom:none}
caption{caption-side:bottom;padding:10px 4px;color:var(--muted);font-size:.85rem;text-align:left}
/* product page */
.product-head{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:start}
@media (max-width:980px){.product-head{grid-template-columns:1fr}}
.gallery-main{border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.gallery-main img{width:100%;aspect-ratio:16/10;object-fit:cover}
.thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px}
.thumbs img{aspect-ratio:4/3;object-fit:cover;border-radius:8px;border:1px solid var(--line);cursor:pointer;transition:border-color .2s}
.thumbs img:hover,.thumbs img.active{border-color:var(--accent)}
.produce-meta{font-size:.92rem;color:var(--muted)}
.produce-meta li{list-style:none;padding:4px 0;display:flex;gap:8px}
.produce-meta{padding:0}
.produce-meta b{color:var(--ink);min-width:110px;display:inline-block}
.prose{max-width:860px}
.prose h2{margin-top:2em}
.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.3em 0}
.faq details{border:1px solid var(--line);border-radius:var(--radius);padding:0;margin-bottom:12px;background:#fff}
.faq summary{font-family:var(--font-head);font-weight:700;color:var(--ink);padding:16px 20px;cursor:pointer;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:12px;font-size:1.3rem;color:var(--accent)}
.faq details[open] summary::after{content:"–"}
.faq .ans{padding:0 20px 18px;color:var(--body)}
/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--navy-deep),var(--navy));border-radius:16px;color:#DCE7F0;padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin-bottom:.25em}
.cta-band p{margin:0;color:#B8CCDC;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
/* contact form */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
@media (max-width:640px){.form-grid{grid-template-columns:1fr}}
label{font-family:var(--font-head);font-weight:600;font-size:.9rem;color:var(--ink);display:block;margin-bottom:6px}
input,select,textarea{width:100%;font:400 1rem/1.5 var(--font-body);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:12px 14px;background:#fff}
input:focus,select:focus,textarea:focus{outline:2px solid var(--blue);outline-offset:1px;border-color:var(--blue)}
.field-err{color:#D0342C;font-size:.85rem;margin-top:5px;display:none}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:#D0342C}
.field.invalid .field-err{display:block}
.form-note{font-size:.88rem;color:var(--muted)}
.form-ok{background:rgba(34,160,90,.12);border:1px solid #22A05A;border-radius:8px;padding:16px 18px;display:none}
.form-ok.show{display:block}
.form-side{display:flex;flex-direction:column;gap:20px}
.info-row{display:flex;gap:14px;align-items:flex-start}
.info-row .ico{width:42px;height:42px;border-radius:10px;background:rgba(14,107,168,.1);display:grid;place-items:center;flex:none}
.info-row .ico svg{width:20px;height:20px;stroke:var(--blue);fill:none;stroke-width:1.8}
.info-row b{display:block;color:var(--ink);font-family:var(--font-head)}
.info-row a,.info-row span{color:var(--body);font-size:.96rem}
/* footer */
.site-footer{background:var(--navy-deep);color:#AFC3D2;padding:72px 0 0;font-size:.95rem}
.f-grid{display:grid;grid-template-columns:1.3fr .8fr .9fr 1fr;gap:44px}
@media (max-width:980px){.f-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.f-grid{grid-template-columns:1fr}}
.site-footer h3{color:#fff;font-size:1rem;margin-bottom:14px}
.site-footer a{color:#AFC3D2}
.site-footer a:hover{color:var(--cryo)}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{padding:4px 0}
.f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-family:var(--font-head);font-weight:800;font-size:1.25rem;margin-bottom:14px}
.f-brand .mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,#11497a,#1c6ea4);display:grid;place-items:center;font-size:.8rem;color:#fff}
.f-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:52px;padding:22px 0;font-size:.86rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
/* floating action buttons */
.float-wa{position:fixed;right:22px;bottom:22px;z-index:70;width:54px;height:54px;border-radius:50%;background:#25D366;display:grid;place-items:center;box-shadow:0 10px 26px -8px rgba(0,0,0,.4);transition:transform .2s var(--ease-out)}
.float-wa:hover{transform:translateY(-3px)}
.float-wa svg{width:28px;height:28px;fill:#fff}
/* breadcrumb on light pages */
.crumbs--light{color:var(--muted)}
.crumbs--light a{color:var(--blue)}
/* misc */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.tag{background:var(--surface);border:1px solid var(--line);color:var(--body);border-radius:999px;padding:5px 14px;font-size:.85rem}
.section--dark .tag{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);color:#C9DCE9}
.skip-link{position:absolute;left:-9999px;top:auto;background:var(--navy);color:#fff;padding:10px 16px;z-index:100;border-radius:6px}
.skip-link:focus{left:12px;top:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.news-item{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.news-item img{border-radius:8px;aspect-ratio:4/3;object-fit:cover}
@media (max-width:560px){.news-item{grid-template-columns:1fr}}
.badge-strip{display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:center;font-family:var(--font-head);font-weight:700;color:var(--muted);font-size:.95rem}
.badge-strip span{display:flex;gap:8px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:10px 18px;background:#fff}