/* Ferrum — production stylesheet. Mobile-first, no frameworks. */
:root{
  --navy:#0D1626; --navy-2:#122038; --navy-3:#1B2C48;
  --accent:#F0810A; --accent-2:#FF9A2E; --accent-soft:#FFF3E4;
  --ink:#14203A; --body:#4A5878; --muted:#7A879F;
  --line:#E3E8F0; --line-2:#EDF1F6; --bg:#FFFFFF; --bg-2:#F6F8FB;
  --radius:14px; --radius-s:10px;
  --shadow:0 1px 2px rgba(13,22,38,.05),0 8px 24px -12px rgba(13,22,38,.14);
  --wrap:1180px; --hdr:64px;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.65;color:var(--body);
  background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden;
  overflow-wrap:break-word}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.2;font-weight:800;letter-spacing:-.02em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin:.3em 0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 16px}
.sr{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--accent);color:#fff;
  padding:10px 16px;border-radius:0 0 8px 0;font-weight:700}
.skip:focus{left:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;
  padding:12px 20px;border-radius:var(--radius-s);font-weight:700;font-size:15px;line-height:1.2;
  text-align:center;transition:background .18s,color .18s,border-color .18s,transform .12s}
.btn:active{transform:translateY(1px)}
.btn svg{width:18px;height:18px;flex:none;fill:currentColor}
.btn--accent{background:var(--accent);color:#fff}
.btn--accent:hover{background:var(--accent-2)}
.btn--tg{background:#229ED9;color:#fff}
.btn--tg:hover{background:#38b0e8}
.btn--ghost{border:1.5px solid rgba(255,255,255,.34);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6)}
.btn--line{border:1.5px solid var(--line);color:var(--ink);background:#fff}
.btn--line:hover{border-color:var(--accent);color:var(--accent)}
.btn--block{width:100%}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:saturate(160%) blur(10px);backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line)}
.hdr__bar{display:flex;align-items:center;gap:12px;height:var(--hdr)}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto;min-width:0}
.brand__mark{width:34px;height:34px;flex:none;border-radius:9px;display:block}
.brand__tx{display:flex;flex-direction:column;min-width:0}
.brand__name{font-weight:900;font-size:18px;letter-spacing:.06em;color:var(--ink);line-height:1.1}
.brand__sub{font-size:10px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);
  font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hdr__call{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:11px;background:var(--accent-soft);color:var(--accent);flex:none}
.hdr__call svg{width:20px;height:20px;fill:currentColor}
.burger{position:relative;width:44px;height:44px;flex:none;border-radius:11px;background:var(--bg-2);
  display:inline-flex;align-items:center;justify-content:center}
.burger span{position:absolute;left:12px;width:20px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .26s cubic-bezier(.3,.8,.4,1),opacity .16s,top .2s}
.burger span:nth-child(1){top:15px}
.burger span:nth-child(2){top:21px}
.burger span:nth-child(3){top:27px}
.nav{display:none}
.hdr__actions{display:none}

/* burger turns into an X when the menu is open */
body.menu-open .burger span:nth-child(1){top:21px;transform:rotate(45deg)}
body.menu-open .burger span:nth-child(2){opacity:0;transform:scaleX(.2)}
body.menu-open .burger span:nth-child(3){top:21px;transform:rotate(-45deg)}
body.menu-open{overflow:hidden}

/* mobile drawer */
.drawer{position:fixed;left:0;right:0;top:var(--hdr);bottom:0;z-index:55;background:#fff;
  transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .22s,transform .22s,visibility .22s;overflow-y:auto;
  -webkit-overflow-scrolling:touch;overscroll-behavior:contain}
body.menu-open .drawer{opacity:1;visibility:visible;transform:none;pointer-events:auto}
.drawer__in{padding:12px 16px 32px;max-width:var(--wrap);margin:0 auto}
.drawer__link{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:15px 2px;font-weight:700;font-size:17px;color:var(--ink);border-bottom:1px solid var(--line-2)}
.drawer__link[aria-current=page]{color:var(--accent)}
.drawer__link svg{width:16px;height:16px;fill:var(--muted)}
.drawer__cta{display:grid;gap:10px;margin-top:20px}
.drawer__meta{margin-top:20px;padding-top:18px;border-top:1px solid var(--line-2);font-size:14px}
.drawer__meta b{color:var(--ink)}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.hero__bg{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:cover;opacity:.42}
.hero::after{content:"";position:absolute;left:0;top:0;right:0;bottom:0;
  background:linear-gradient(180deg,rgba(13,22,38,.80) 0%,rgba(13,22,38,.70) 45%,rgba(13,22,38,.92) 100%)}
.hero__in{position:relative;z-index:2;padding-block:44px 40px}
.hero__badge{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:99px;
  background:rgba(240,129,10,.16);border:1px solid rgba(240,129,10,.34);color:var(--accent-2);
  font-size:12.5px;font-weight:700;margin-bottom:18px}
.hero h1{color:#fff;font-size:clamp(25px,7vw,56px);line-height:1.1;letter-spacing:-.03em;margin-bottom:18px}
.hero h1 .l2{display:block;color:var(--accent-2)}
.hero__lead{font-size:16px;color:#C5D0E4;max-width:56ch;margin-bottom:26px}
.hero__cta{display:grid;gap:10px;grid-template-columns:1fr}
.hero__stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;margin-top:34px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);overflow:hidden}
.hero__stat{background:rgba(13,22,38,.72);padding:16px 14px}
.hero__stat b{display:block;font-size:24px;font-weight:900;color:var(--accent-2);line-height:1.1;
  letter-spacing:-.02em}
.hero__stat span{display:block;font-size:12.5px;color:#B6C3DA;margin-top:4px;line-height:1.35}

/* ---------- sections ---------- */
.sec{padding:52px 0}
.sec--alt{background:var(--bg-2)}
.sec--dark{background:var(--navy);color:#C5D0E4}
.sec--dark h2,.sec--dark h3{color:#fff}
.sec__head{margin-bottom:26px;max-width:62ch}
.sec__kicker{display:block;font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);margin-bottom:10px}
.sec h2{font-size:clamp(23px,5.2vw,36px);margin-bottom:12px}
.sec__lead{font-size:15.5px;margin:0}
.sec__foot{margin-top:26px}

/* ---------- card grids ---------- */
.grid{display:grid;gap:12px;grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;transition:border-color .18s,box-shadow .18s,transform .18s}
.card:hover{border-color:#CBD5E5;box-shadow:var(--shadow);transform:translateY(-2px)}
.card__img{position:relative;aspect-ratio:1/1;background:var(--bg-2);overflow:hidden}
.card__img img{width:100%;height:100%;object-fit:cover}
.card__b{padding:12px 13px 14px;display:flex;flex-direction:column;flex:1;gap:6px}
.card__t{font-size:14px;font-weight:700;color:var(--ink);line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card__n{font-size:12.5px;color:var(--muted);margin-top:auto;padding-top:4px}
.card__more{font-size:13px;font-weight:700;color:var(--accent);margin-top:auto;padding-top:6px;
  display:inline-flex;align-items:center;gap:5px}
.card__more svg{width:13px;height:13px;fill:currentColor}

/* ---------- advantages ---------- */
.feat{display:grid;gap:12px}
.feat__i{display:flex;gap:14px;padding:18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius)}
.sec--dark .feat__i{background:var(--navy-2);border-color:var(--navy-3)}
.feat__ico{width:44px;height:44px;flex:none;border-radius:11px;background:var(--accent-soft);
  color:var(--accent);display:grid;place-items:center}
.sec--dark .feat__ico{background:rgba(240,129,10,.15)}
.feat__ico svg{width:22px;height:22px;fill:currentColor}
.feat__t{font-size:16px;font-weight:800;color:var(--ink);margin-bottom:5px}
.sec--dark .feat__t{color:#fff}
.feat__d{font-size:14.5px;margin:0}

/* ---------- steps ---------- */
.steps{display:grid;gap:12px;counter-reset:s}
.step{position:relative;padding:20px 18px 18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius)}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;
  width:32px;height:32px;border-radius:9px;background:var(--navy);color:var(--accent-2);
  font-weight:900;font-size:15px;margin-bottom:11px}
.step__t{font-size:16px;font-weight:800;color:var(--ink);margin-bottom:5px}
.step p{font-size:14.5px;margin:0}

/* ---------- gallery / clients ---------- */
.gal{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.gal img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:var(--radius-s);background:var(--navy-2)}
.gal > *:first-child{grid-column:span 2}
.gal > *:first-child img{aspect-ratio:16/9}
.clients{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.client{display:grid;place-items:center;padding:16px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-s);min-height:90px}
.client img{max-height:56px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.72;transition:.2s}
.client:hover img{filter:none;opacity:1}

/* ---------- CTA band ---------- */
.cta{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-3) 100%);color:#fff;
  border-radius:var(--radius);padding:28px 20px;text-align:center}
.cta h2{color:#fff;font-size:clamp(21px,4.6vw,30px);margin-bottom:10px}
.cta p{color:#C5D0E4;font-size:15px;max-width:52ch;margin:0 auto 20px}
.cta__b{display:grid;gap:10px}

/* ---------- breadcrumbs ---------- */
.crumbs{font-size:13px;color:var(--muted);padding:14px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.crumbs li{margin:0;display:flex;align-items:center;gap:6px}
.crumbs li+li::before{content:"/";color:#C3CCDC}
.crumbs a:hover{color:var(--accent)}
.crumbs [aria-current]{color:var(--ink);font-weight:600}

/* ---------- page head ---------- */
.phead{padding:18px 0 26px;border-bottom:1px solid var(--line-2)}
.phead h1{font-size:clamp(25px,6.2vw,42px);line-height:1.12;margin-bottom:12px}
.phead h1 .l2{display:block;color:var(--accent)}
.phead__lead{font-size:16px;max-width:64ch;margin:0}

/* ---------- product page ---------- */
.pdp{display:grid;gap:22px;padding:26px 0 8px}
.pdp__media{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-2)}
.pdp__media img{width:100%;aspect-ratio:1/1;object-fit:cover}
.pdp h1{font-size:clamp(22px,5.4vw,34px);margin-bottom:10px}
.pdp__cat{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:800;
  letter-spacing:.09em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.pdp__lead{font-size:15.5px;margin-bottom:18px}
.pdp__box{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.pdp__box h2{font-size:17px;margin-bottom:6px}
.pdp__box p{font-size:14px;margin-bottom:14px}
.pdp__cta{display:grid;gap:9px}
.spec{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:0 0 18px}
.spec caption{text-align:left;font-weight:800;color:var(--ink);padding:14px 16px 10px;font-size:16px}
.spec th,.spec td{padding:11px 16px;font-size:14.5px;text-align:left;border-top:1px solid var(--line-2);
  vertical-align:top}
.spec th{color:var(--body);font-weight:600;width:56%}
.spec td{color:var(--ink);font-weight:700}
.spec tr:nth-child(odd) th,.spec tr:nth-child(odd) td{background:var(--bg-2)}

/* rich text */
.rt{font-size:15.5px;overflow-wrap:anywhere}
.rt h2{font-size:clamp(19px,4.4vw,26px);margin:30px 0 12px}
.rt h3{font-size:17px;margin:24px 0 9px}
.rt h2:first-child,.rt h3:first-child{margin-top:0}
.rt ul{padding-left:1.1em}
.rt li::marker{color:var(--accent)}
.rt img{border-radius:var(--radius-s);border:1px solid var(--line);margin:18px 0}
.rt figure{margin:18px 0}

/* ---------- contacts ---------- */
.ct{display:grid;gap:12px}
.ct__i{display:flex;gap:14px;padding:18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius)}
.ct__ico{width:44px;height:44px;flex:none;border-radius:11px;background:var(--accent-soft);
  color:var(--accent);display:grid;place-items:center}
.ct__ico svg{width:21px;height:21px;fill:currentColor}
.ct__l{font-size:12px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);
  margin-bottom:4px}
.ct__v{font-size:15px;font-weight:700;color:var(--ink);line-height:1.4;overflow-wrap:anywhere}
.ct__v a:hover{color:var(--accent)}
.ct__v .sub{display:block;font-size:13.5px;font-weight:500;color:var(--body);margin-top:2px}
.map{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-2)}
.map iframe{display:block;width:100%;height:320px;border:0}

/* ---------- catalog pills ---------- */
.pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.pill{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:99px;
  border:1px solid var(--line);background:#fff;font-size:13.5px;font-weight:600;color:var(--body)}
.pill:hover{border-color:var(--accent);color:var(--accent)}
.pill[aria-current=page]{background:var(--navy);border-color:var(--navy);color:#fff}
.pill b{font-weight:800;color:var(--accent)}
.pill[aria-current=page] b{color:var(--accent-2)}

/* ---------- footer ---------- */
.ft{background:var(--navy);color:#98A6BF;font-size:14.5px;padding:40px 0 0;margin-top:56px}
.ft a:hover{color:#fff}
.ft__grid{display:grid;gap:28px}
.ft__t{font-size:13px;font-weight:800;letter-spacing:.11em;text-transform:uppercase;color:#fff;
  margin-bottom:14px}
.ft__list{list-style:none;margin:0;padding:0}
.ft__list li{margin:0 0 9px}
.ft__brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.ft__brand img{width:36px;height:36px;border-radius:9px}
.ft__brand span{font-weight:900;font-size:19px;letter-spacing:.06em;color:#fff}
.ft__cta{display:grid;gap:9px;margin-top:16px}
.ft__bot{margin-top:34px;border-top:1px solid rgba(255,255,255,.1);padding:18px 0 24px;
  display:grid;gap:8px;font-size:13.5px;color:#7F8DA8}
.ft__bot a{color:#B9C6DC;font-weight:600;text-decoration:underline;text-underline-offset:3px}
.ft__bot a:hover{color:var(--accent-2)}

/* ---------- floating contact buttons (mobile) ---------- */
.fab{position:fixed;right:14px;bottom:14px;z-index:50;display:flex;flex-direction:column;gap:10px}
.fab a{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:#fff;
  box-shadow:0 6px 20px rgba(13,22,38,.3)}
.fab a svg{width:24px;height:24px;fill:currentColor}
.fab__tg{background:#229ED9}
.fab__tel{background:var(--accent)}

/* ---------- responsive ---------- */
@media (min-width:600px){
  .ct__v{font-size:16px}
  .grid{gap:16px;grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .hero__cta{grid-auto-flow:column;grid-template-columns:none;justify-content:start}
  .hero__stats{grid-template-columns:repeat(4,1fr)}
  .cta__b{grid-auto-flow:column;justify-content:center}
  .drawer__cta{grid-auto-flow:column}
  .clients{grid-template-columns:repeat(4,1fr)}
  .gal{grid-template-columns:repeat(3,1fr)}
  .gal > *:first-child{grid-column:span 2;grid-row:span 2}
  .gal > *:first-child img{aspect-ratio:1/1}
  .pdp__cta{grid-auto-flow:column}
  .ft__cta{grid-auto-flow:column;justify-content:start}
}
@media (min-width:860px){
  .wrap{padding:0 24px}
  .sec{padding:72px 0}
  .hero__in{padding-block:76px 68px}
  .hero__lead{font-size:18px}
  .feat{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .ct{grid-template-columns:repeat(2,1fr)}
  .ft__grid{grid-template-columns:1.4fr 1fr 1fr}
  .ft__bot{grid-template-columns:1fr auto;align-items:center}
  .pdp{grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:34px;padding:34px 0 10px}
  .phead{padding:22px 0 34px}
  .grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .map iframe{height:420px}
}
@media (min-width:980px){
  :root{--hdr:74px}
  .burger,.drawer,.hdr__call,.fab{display:none}
  .nav{display:flex;align-items:center;gap:4px}
  .nav a{padding:10px 14px;border-radius:9px;font-weight:600;font-size:15px;color:var(--body)}
  .nav a:hover{background:var(--bg-2);color:var(--ink)}
  .nav a[aria-current=page]{color:var(--accent);background:var(--accent-soft)}
  .hdr__actions{display:flex;align-items:center;gap:10px;margin-left:14px}
  .hdr__phone{display:flex;flex-direction:column;line-height:1.15;text-align:right}
  .hdr__phone b{font-size:16px;font-weight:800;color:var(--ink);white-space:nowrap}
  .hdr__phone span{font-size:11.5px;color:var(--muted)}
  .hdr__actions .btn{min-height:42px;padding:9px 16px;font-size:14px}
  .brand__mark{width:40px;height:40px}
  .brand__name{font-size:21px}
  .brand__sub{font-size:10.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}