/* PARTBASE prototype — industrial B2B stylesheet */
:root{
  --ink:#0b1220; --ink-2:#121c2e; --ink-3:#1c2942;
  --paper:#f6f7f9; --card:#ffffff; --line:#e2e6ec; --line-2:#cfd6e0;
  --text:#111a2b; --muted:#5b6678; --muted-2:#7c8698;
  --amber:#f5a623; --amber-2:#e08e00; --amber-soft:#fff4e0;
  --green:#1f8a5b; --red:#c0392b;
  --r:10px; --r-lg:16px;
  --shadow:0 1px 2px rgba(11,18,32,.06),0 8px 24px rgba(11,18,32,.06);
  --shadow-lg:0 2px 4px rgba(11,18,32,.06),0 18px 48px rgba(11,18,32,.12);
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --cond:"Barlow Condensed","Arial Narrow",Impact,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--paper);-webkit-font-smoothing:antialiased;line-height:1.55;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.15;letter-spacing:-.02em;font-weight:700}
p{margin:0}
.wrap{width:min(1180px,92vw);margin:0 auto}
.muted{color:var(--muted)}
.small{font-size:13px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

/* demo strip */
.demo{background:var(--amber);color:#241a05;font-size:12.5px;font-weight:600;text-align:center;padding:6px 14px;letter-spacing:.01em}
.demo span{opacity:.75;font-weight:500}

/* ---------- header ---------- */
.site-head{position:sticky;top:0;z-index:60;background:rgba(11,18,32,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{display:flex;align-items:center;gap:26px;height:66px}
.logo{display:flex;align-items:center;gap:10px;white-space:nowrap;color:#fff;font-family:var(--cond);font-size:24px;letter-spacing:.06em;font-weight:700}
.logo b{color:var(--amber)}
.logo-mark{width:30px;height:30px;border-radius:7px;background:linear-gradient(145deg,var(--amber),#ff7a00);display:grid;place-items:center;color:#0b1220;font-weight:900;font-size:15px;font-family:var(--cond)}
.nav-links{display:flex;gap:22px;margin-left:8px}
.nav-links a{color:#c9d2e0;font-size:14px;font-weight:500;padding:6px 0;position:relative}
.nav-links a:hover{color:#fff}
.nav-links a.on{color:#fff}
.nav-links a.on:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--amber)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.lang{display:flex;border:1px solid rgba(255,255,255,.18);border-radius:7px;overflow:hidden}
.lang a{padding:5px 10px;font-size:12.5px;color:#9fb0c8;font-weight:600}
.lang a.on{background:var(--amber);color:#0b1220}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;font-family:inherit;font-weight:650;font-size:14.5px;padding:12px 20px;border-radius:9px;transition:.18s}
.btn-amber{background:var(--amber);color:#20160a;box-shadow:0 4px 14px rgba(245,166,35,.3)}
.btn-amber:hover{background:#ffb733;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-3)}
.btn-line{background:#fff;border:1px solid var(--line-2);color:var(--text)}
.btn-line:hover{border-color:var(--ink);}
.btn-wa{background:#1f8a5b;color:#fff}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background:url("../img/5-full-1200.jpg") center 42%/cover no-repeat;opacity:.42;filter:saturate(.85)}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,#0b1220 32%,rgba(11,18,32,.72) 62%,rgba(11,18,32,.35))}
.hero .wrap{position:relative;z-index:2;padding:74px 0 66px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);font-weight:700}
.kicker:before{content:"";width:26px;height:2px;background:var(--amber)}
.hero h1{font-family:var(--cond);font-size:clamp(40px,5.6vw,68px);letter-spacing:.01em;text-transform:uppercase;margin:16px 0 14px;max-width:15ch}
.hero p{color:#b9c4d6;max-width:58ch;font-size:16.5px}
.searchbar{margin-top:30px;display:flex;background:#fff;border-radius:12px;padding:6px;max-width:660px;box-shadow:var(--shadow-lg)}
.searchbar input{flex:1;border:0;outline:0;font-family:inherit;font-size:15.5px;padding:12px 14px;color:var(--text);background:transparent;min-width:0}
.searchbar .btn{border-radius:8px;padding:12px 22px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chip{font-size:12.5px;color:#cdd6e4;border:1px solid rgba(255,255,255,.16);padding:5px 11px;border-radius:99px;background:rgba(255,255,255,.04)}
.chip:hover{border-color:var(--amber);color:var(--amber)}

/* ---------- generic sections ---------- */
section{padding:64px 0}
section.tight{padding:44px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.sec-head h2{font-size:clamp(26px,3vw,36px)}
.sec-head p{color:var(--muted);font-size:15px;margin-top:8px;max-width:62ch}
.eyebrow{font-size:12px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted-2);font-weight:700;margin-bottom:10px}

/* trust bar */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:-30px;position:relative;z-index:5;background:#fff}
.trust div{padding:18px 20px;background:#fff;display:flex;align-items:center;gap:11px;font-size:14px;font-weight:600}
.trust svg{flex:none;color:var(--amber-2)}

/* category grid */
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cat{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;transition:.18s;position:relative;overflow:hidden}
.cat:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-2)}
.cat .ico{width:44px;height:44px;border-radius:11px;background:var(--ink);color:var(--amber);display:grid;place-items:center;margin-bottom:14px}
.cat h3{font-size:16.5px;margin-bottom:6px}
.cat p{font-size:13.5px;color:var(--muted)}
.cat .n{position:absolute;top:18px;right:20px;font-size:12px;color:var(--muted-2);font-weight:600}

/* product cards */
.prods{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:18px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;display:flex;flex-direction:column;transition:.18s}
.pcard:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.pcard .ph{aspect-ratio:4/3;background:#eef1f5;position:relative;overflow:hidden}
.pcard .ph img{width:100%;height:100%;object-fit:cover;transition:.4s}
.pcard:hover .ph img{transform:scale(1.04)}
.pcard .tag{position:absolute;top:10px;left:10px;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;background:rgba(11,18,32,.85);color:#fff;padding:4px 8px;border-radius:5px}
.pcard .body{padding:16px 16px 18px;display:flex;flex-direction:column;gap:9px;flex:1}
.pcard h3{font-size:14.5px;line-height:1.35;font-weight:650}
.pcard .oem{display:flex;flex-wrap:wrap;gap:5px}
.pcard .oem span{font-family:ui-monospace,monospace;font-size:11px;background:var(--paper);border:1px solid var(--line);color:var(--muted);padding:2px 6px;border-radius:4px}
.pcard .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:10px;border-top:1px dashed var(--line)}
.pcard .price{font-size:15.5px;font-weight:700}
.pcard .price small{font-weight:500;color:var(--muted);font-size:11.5px;display:block}
.ph-empty{display:grid;place-items:center;height:100%;color:var(--muted-2);font-size:12px;text-align:center;padding:16px;background:repeating-linear-gradient(135deg,#eef1f5,#eef1f5 10px,#e7ebf1 10px,#e7ebf1 20px)}

/* ---------- product page ---------- */
.crumbs{font-size:12.5px;color:var(--muted-2);padding:18px 0 0}
.crumbs a:hover{color:var(--ink)}
.crumbs span{margin:0 7px;opacity:.5}
.pdp{display:grid;grid-template-columns:1.08fr .92fr;gap:38px;padding:22px 0 10px;align-items:start}
.gallery{position:sticky;top:88px}
.gmain{aspect-ratio:4/3;border-radius:var(--r-lg);overflow:hidden;background:#eef1f5;border:1px solid var(--line)}
.gmain img{width:100%;height:100%;object-fit:cover}
.gthumbs{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}
.gthumbs button{width:76px;height:60px;border-radius:8px;overflow:hidden;border:2px solid transparent;padding:0;cursor:pointer;background:#eef1f5}
.gthumbs button.on{border-color:var(--amber)}
.gthumbs img{width:100%;height:100%;object-fit:cover}
.buybox h1{font-size:clamp(23px,2.5vw,31px);line-height:1.22}
.obadges{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}
.obadges span{font-family:ui-monospace,monospace;font-size:12px;background:var(--amber-soft);border:1px solid #f3d9a8;color:#8a5a00;padding:4px 8px;border-radius:6px}
.price-row{display:flex;align-items:baseline;gap:10px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:4px 0 16px}
.price-row .big{font-size:26px;font-weight:750}
.price-row .unit{font-size:13px;color:var(--muted)}
.kv{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px;margin:16px 0 20px}
.kv div{border-left:2px solid var(--line-2);padding-left:11px}
.kv dt{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2);font-weight:700}
.kv dd{margin:3px 0 0;font-size:14.5px;font-weight:600}
.cta-row{display:flex;gap:10px;flex-wrap:wrap}
.cta-row .btn{flex:1;min-width:150px}
.notes{margin-top:16px;font-size:12.5px;color:var(--muted);background:var(--paper);border:1px dashed var(--line-2);padding:11px 13px;border-radius:8px}

/* tables */
.tbl{width:100%;border-collapse:collapse;font-size:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.tbl th,.tbl td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}
.tbl th{background:var(--paper);font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:700}
.tbl tr:last-child td{border-bottom:0}
.tbl td.mono{font-family:ui-monospace,monospace;font-size:13px}

/* forms */
.form{display:grid;grid-template-columns:1fr 1fr;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow)}
.form .full{grid-column:1/-1}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12.5px;font-weight:650;color:var(--muted)}
.field input,.field select,.field textarea{font-family:inherit;font-size:14.5px;padding:11px 12px;border:1px solid var(--line-2);border-radius:8px;background:#fff;color:var(--text);outline:0}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--amber);box-shadow:0 0 0 3px rgba(245,166,35,.15)}
.form .hint{font-size:12px;color:var(--muted-2)}
.form-status{grid-column:1/-1;font-size:13.5px;padding:12px 14px;border-radius:8px;display:none}
.form-status.ok{display:block;background:#e9f7ef;border:1px solid #bfe6cf;color:#17603d}

/* steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px;position:relative}
.step:before{counter-increment:s;content:counter(s,decimal-leading-zero);font-family:var(--cond);font-size:28px;color:var(--amber);font-weight:700;line-height:1}
.step h4{font-size:14.5px;margin:8px 0 5px}
.step p{font-size:13px;color:var(--muted)}

/* split media */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split .media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--line);background:#000}
.split .media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split ul{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:11px}
.split li{display:flex;gap:11px;font-size:14.5px;color:#26334a}
.split li svg{flex:none;color:var(--green);margin-top:2px}

/* regions */
.regions{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.region{background:var(--ink);color:#fff;border-radius:var(--r-lg);padding:24px;position:relative;overflow:hidden}
.region:nth-child(2){background:var(--ink-2)}
.region:nth-child(3){background:var(--ink-3)}
.region h3{font-size:18px;margin-bottom:8px}
.region p{font-size:13.5px;color:#aebbd0}
.region .meta{margin-top:16px;display:flex;gap:18px;font-size:12px;color:#8fa1bc}
.region .meta b{display:block;color:var(--amber);font-size:13.5px;margin-top:2px}

/* video */
.video{background:#000;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.video video{width:100%;display:block}

/* cta banner */
.banner{background:linear-gradient(115deg,var(--ink),var(--ink-3));color:#fff;border-radius:var(--r-lg);padding:44px;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.banner h2{font-size:clamp(24px,2.6vw,32px);max-width:22ch}
.banner p{color:#aebbd0;margin-top:8px;font-size:14.5px}

/* finder */
.finder-box{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;box-shadow:var(--shadow)}
.finder-input{display:flex;gap:10px;flex-wrap:wrap}
.finder-input input{flex:1;min-width:240px;font-size:16px;padding:14px 16px;border:1.5px solid var(--line-2);border-radius:10px;font-family:inherit;outline:0}
.finder-input input:focus{border-color:var(--amber)}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.filters button{font-family:inherit;font-size:12.5px;padding:6px 12px;border-radius:99px;border:1px solid var(--line-2);background:#fff;cursor:pointer;color:var(--muted);font-weight:600}
.filters button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.results{margin-top:22px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.empty{grid-column:1/-1;text-align:center;padding:46px 20px;color:var(--muted);border:1px dashed var(--line-2);border-radius:var(--r)}

/* footer */
.site-foot{background:var(--ink);color:#93a3bb;padding:52px 0 26px;margin-top:20px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.site-foot h5{color:#fff;font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;margin:0 0 14px}
.site-foot a{display:block;font-size:13.5px;padding:5px 0;color:#93a3bb}
.site-foot a:hover{color:var(--amber)}
.site-foot .about{font-size:13.5px;line-height:1.65;max-width:34ch}
.disc{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:18px;font-size:11.5px;color:#71809a;line-height:1.6}

/* responsive layout helpers (never use inline grid-template-columns) */
.split-media{grid-template-columns:1.25fr .75fr}
.cols-2{grid-template-columns:1.25fr .75fr}
.cols-3{grid-template-columns:repeat(3,1fr)}
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
@media (max-width:1020px){.split-media,.cols-2{grid-template-columns:1fr!important}.cols-3{grid-template-columns:1fr 1fr}}
@media (max-width:680px){.cols-3{grid-template-columns:1fr}.tbl{font-size:12.5px}.tbl th,.tbl td{padding:8px 9px;word-break:break-word}.tbl-wrap{margin:0 -6px}}

/* cyrillic runs wider — pull display sizes down a notch */
html[lang="ru"] .hero h1{font-size:clamp(34px,4.6vw,56px);letter-spacing:0}
html[lang="ru"] .sec-head h2{font-size:clamp(24px,2.7vw,32px)}
html[lang="ru"] .pcard h3{font-size:14px}

/* responsive */
@media (max-width:1020px){
  .prods{grid-template-columns:repeat(3,1fr)}
  .cats{grid-template-columns:repeat(3,1fr)}
  .pdp{grid-template-columns:1fr;gap:26px}
  .gallery{position:static}
  .split{grid-template-columns:1fr;gap:24px}
  .results{grid-template-columns:repeat(2,1fr)}
  .trust{grid-template-columns:repeat(2,1fr)}
  .fgrid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media (max-width:680px){
  .nav{height:58px;gap:10px}
  .logo{font-size:20px}
  .logo-mark{width:26px;height:26px;font-size:13px}
  .nav-right{gap:8px}
  .nav-right .btn{padding:9px 13px;font-size:13px}
  .lang a{padding:4px 7px;font-size:11.5px}
  .hero h1{font-size:clamp(30px,8.4vw,40px)}
  .kicker{font-size:11px;letter-spacing:.1em}
  .searchbar{flex-wrap:wrap}
  .searchbar .btn{width:100%}
  .searchbar input{width:100%}

  .prods,.cats,.regions,.steps{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr}
  .results{grid-template-columns:1fr}
  .form{grid-template-columns:1fr}
  .hero .wrap{padding:52px 0 44px}
  .trust{grid-template-columns:1fr;margin-top:0;border-radius:0}
  section{padding:44px 0}
  .banner{padding:28px}
  .kv{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr}
}