/* amcarchips.pl — wersja 2
   Motyw: wydruk z hamowni. Granat i czerwień z amerykańskiej flagi (jak w logo),
   papier z siatką wykresu, krój Big Shoulders (nagłówki) + Barlow (tekst). */

:root{
  --ink:#0f1b2d;
  --ink-2:#1d2b42;
  --red:#d7192a;
  --red-dark:#b0101f;
  --paper:#f3f5f7;
  --grid:#dce1e7;
  --steel:#566173;
  --stock:#97a1af;
  --white:#fff;
  --line:#d5dbe2;

  --display:"Big Shoulders Display","Arial Narrow",Impact,sans-serif;
  --text:Barlow,"Segoe UI",Helvetica,Arial,sans-serif;

  --max:1200px;
  --gutter:clamp(16px,4vw,40px);
  --header-h:78px;
  --radius:4px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font:400 18px/1.6 var(--text);color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
picture{display:block}
a{color:var(--red-dark);text-underline-offset:3px}
a:hover{color:var(--red)}
:focus-visible{outline:3px solid var(--red);outline-offset:3px}
p{margin:0 0 1em;max-width:68ch}
ul{margin:0 0 1em;padding-left:1.2em}
li{margin-bottom:.35em}
strong{font-weight:600}

h1,h2,h3{font-family:var(--display);font-weight:800;line-height:.98;letter-spacing:.005em;margin:0 0 .45em;text-transform:uppercase}
h1{font-size:clamp(40px,5.6vw,80px)}
h2{font-size:clamp(34px,4.4vw,58px)}
h3{font-size:clamp(24px,2.4vw,30px);line-height:1.05}
h4{font:600 19px/1.3 var(--text);margin:0 0 .4em}

.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:200;background:#fff;padding:10px 14px}
.lead{font-size:clamp(19px,1.6vw,22px);line-height:1.5;color:var(--ink-2)}
.muted{color:var(--steel)}
.small{font-size:15px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:var(--radius);font:600 17px/1.1 var(--text);text-decoration:none;border:2px solid transparent;transition:background-color .15s,color .15s,border-color .15s;cursor:pointer}
.btn svg{width:20px;height:20px;flex:none}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark);color:#fff}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-line:hover{background:var(--ink);color:#fff}
.btn-white{background:#fff;color:var(--ink)}
.btn-white:hover{background:var(--paper);color:var(--ink)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 14px}
.appt{display:flex;gap:8px;align-items:flex-start;font-size:15px;color:var(--steel);margin:0}
.appt svg{width:18px;height:18px;flex:none;margin-top:3px;color:var(--red)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:20px;height:var(--header-h)}
.logo{flex:none}
.logo img{width:190px}
.nav{margin-left:auto}
.menu{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:2px}
.menu li{margin:0;position:relative}
.menu > li > a,.menu > li > button{display:block;white-space:nowrap;padding:10px 10px;font:600 16px/1 var(--text);color:var(--ink);text-decoration:none;background:none;border:0;cursor:pointer;border-radius:var(--radius)}
.menu > li > a:hover,.menu > li > button:hover{color:var(--red)}
.menu > li.current > a,.menu > li.current > button{color:var(--red)}
.has-sub > button::after{content:"";display:inline-block;width:7px;height:7px;margin-left:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-3px) rotate(45deg)}
.sub{list-style:none;margin:0;padding:8px;position:absolute;top:calc(100% + 8px);left:0;min-width:260px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 14px 32px rgba(15,27,45,.14);display:none}
.sub a{display:block;padding:10px 12px;color:var(--ink);text-decoration:none;border-radius:var(--radius);font-weight:500}
.sub a:hover{background:var(--paper);color:var(--red-dark)}
.has-sub.open > .sub{display:block}
@media (hover:hover) and (min-width:1181px){.has-sub:hover > .sub{display:block}.has-sub:hover > .sub::before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px}}
.header-call{flex:none;padding:11px 16px;font-size:16px}
.nav-toggle{display:none;margin-left:auto;background:none;border:0;padding:10px;cursor:pointer}
.nav-toggle span{display:block;width:26px;height:2px;background:var(--ink);margin:6px 0;transition:transform .2s,opacity .2s}

/* ---------- Breadcrumbs ---------- */
.crumbs{font-size:14px;color:var(--steel);padding:18px 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li{margin:0}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--stock)}
.crumbs a{color:var(--steel)}

/* ---------- Dyno paper (the signature surface) ---------- */
.paper{background-color:var(--paper);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px;background-position:-1px -1px}

/* ---------- Hero ---------- */
.hero{border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:clamp(24px,4vw,64px);align-items:center;padding-top:clamp(40px,6vw,80px);padding-bottom:clamp(40px,6vw,80px)}
.hero h1{margin-bottom:.3em;font-size:clamp(40px,4.8vw,72px)}
.hero .wrap > div{min-width:0}
.hero h1 .loc{display:block;font-size:.42em;letter-spacing:.02em;color:var(--steel);margin-top:.35em}
.hero .lead{max-width:34ch}

.dyno{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 14px;box-shadow:0 1px 0 var(--line)}
.dyno svg{width:100%;height:auto;display:block;overflow:visible}
.dyno .gridline{stroke:var(--grid);stroke-width:1}
.dyno .axis{font:500 12px var(--text);fill:var(--steel)}
.dyno .axis-title{font:600 12px var(--text);fill:var(--steel)}
.dyno .c-stock{fill:none;stroke:var(--stock);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.dyno .c-tuned{fill:none;stroke:var(--red);stroke-width:3.5;stroke-linecap:round;stroke-linejoin:round}
.dyno .c-stock.t,.dyno .c-tuned.t{stroke-dasharray:1 6;stroke-width:3.2}
.dyno .gain{fill:var(--red);opacity:.09}
.dyno .peak{font:800 22px var(--display);fill:var(--red)}
.dyno .peak.s{fill:var(--steel)}
.dyno-legend{display:flex;flex-wrap:wrap;gap:6px 20px;margin:10px 0 6px;font-size:15px}
.dyno-legend span{display:inline-flex;align-items:center;gap:8px}
.dyno-legend i{display:inline-block;width:26px;height:0;border-top:3px solid var(--stock)}
.dyno-legend i.r{border-color:var(--red)}
.dyno-legend i.d{border-top-style:dotted}
.dyno figcaption{font-size:14px;color:var(--steel);line-height:1.45}
.dyno-src{display:inline-block;margin-top:10px;font-size:13px;color:var(--steel)}
.dyno-sm{padding:14px 14px 10px}
.dyno-sm .dyno-legend{font-size:14px}
.dyno-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);margin-top:12px;padding-top:12px;gap:12px}
.dyno-stats div{font-size:14px;color:var(--steel);line-height:1.3}
.dyno-stats b{display:block;font:800 26px/1.05 var(--display);color:var(--ink);margin-bottom:2px}
.dyno-stats b em{font-style:normal;color:var(--red)}

.dyno .note{font:600 13px var(--text);fill:var(--red-dark)}
.dyno .peak{font-size:20px}
/* curves reveal left-to-right, once: grey (seria) first, then red (po strojeniu) */
.dyno .rev{transform-box:fill-box;transform-origin:left center}
@media (prefers-reduced-motion:no-preference){
  .js .dyno:not(.go) .rev{transform:scaleX(0)}
  /* failsafe: if main.js never runs (old cached copy, blocked script), show the charts after 4 s */
  .js:not(.dyno-js) .dyno:not(.go) .rev{animation:reveal 1.2s 4s both}
  .js:not(.dyno-js) .dyno:not(.go) .gain{animation:fadeg .6s 5s both}
  .js:not(.dyno-js) .dyno:not(.go) .peak,.js:not(.dyno-js) .dyno:not(.go) .note{animation:fade .5s 5s both}
  .js .dyno.go .rev{animation:reveal 1.5s cubic-bezier(.45,0,.2,1) both}
  .js .dyno.go .rev.d2{animation-delay:1s}
  .js .dyno:not(.go) .gain,.js .dyno:not(.go) .peak,.js .dyno:not(.go) .note{opacity:0}
  .js .dyno.go .gain{animation:fadeg .6s 2.3s both}
  .js .dyno.go .peak,.js .dyno.go .note{animation:fade .5s 2.5s both}
}
@keyframes reveal{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes fadeg{from{opacity:0}to{opacity:.09}}

/* ---------- Facts strip ---------- */
.facts{background:var(--ink);color:#fff}
.facts ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr)}
.facts li{margin:0;padding:22px 20px;border-left:1px solid rgba(255,255,255,.14);font-size:16px;line-height:1.35;color:#c9d1dc}
.facts li:first-child{border-left:0;padding-left:0}
.facts b{display:block;font:800 22px/1.05 var(--display);text-transform:uppercase;color:#fff;margin-bottom:4px;letter-spacing:.01em}

/* ---------- Generic sections ---------- */
.sec{padding:clamp(56px,8vw,104px) 0}
.sec-head{max-width:760px;margin-bottom:clamp(28px,4vw,48px)}
.sec-head p{color:var(--ink-2)}
.alt{background:var(--paper)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.split.top{align-items:start}
.split-5-7{grid-template-columns:5fr 7fr}
.figure img{border-radius:var(--radius)}
.figure figcaption{font-size:14px;color:var(--steel);margin-top:8px}

/* services index */
.svc-groups{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,3vw,48px)}
.svc-group h3{font-size:22px;color:var(--steel);border-bottom:3px solid var(--ink);padding-bottom:10px;margin-bottom:6px}
.svc-list{list-style:none;margin:0;padding:0}
.svc-list li{margin:0;border-bottom:1px solid var(--line)}
.svc-list a{display:block;padding:16px 0;text-decoration:none;color:var(--ink)}
.svc-list a strong{display:flex;justify-content:space-between;align-items:center;font-size:20px;font-weight:600}
.svc-list a strong::after{content:"";width:9px;height:9px;border-top:2px solid var(--red);border-right:2px solid var(--red);transform:rotate(45deg);transition:transform .15s;flex:none;margin-left:12px}
.svc-list a span{display:block;font-size:16px;color:var(--steel);line-height:1.45;margin-top:2px}
.svc-list a:hover strong{color:var(--red-dark)}
.svc-list a:hover strong::after{transform:translateX(4px) rotate(45deg)}

/* process steps (real sequence) */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:s;border-top:3px solid var(--ink)}
.steps li{margin:0;padding:20px 20px 0 0;counter-increment:s;position:relative}
.steps li::before{content:counter(s);display:block;font:800 64px/1 var(--display);color:transparent;-webkit-text-stroke:2px var(--red);margin-bottom:10px}
.steps h4{font-size:19px}
.steps p{font-size:16px;color:var(--steel);margin:0}

/* power ladder (packages) */
.ladder{display:grid;gap:14px}
.rung{display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:center}
.rung-name{font:800 30px/1 var(--display);text-transform:uppercase}
.rung-name small{display:block;font:500 15px/1.3 var(--text);text-transform:none;color:var(--steel);margin-top:4px}
.rung-bar{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);min-height:64px;overflow:hidden}
.rung-fill{position:absolute;inset:0 auto 0 0;width:var(--w);background:var(--red);opacity:.12;border-right:3px solid var(--red)}
.rung-body{position:relative;padding:12px 16px;display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px}
.rung-body b{font:800 26px/1 var(--display);color:var(--red-dark);margin-right:6px;white-space:nowrap}
.rung-body span{font-size:15px;color:var(--ink-2);white-space:nowrap}
.rung-body span+span::before{content:"+";margin-right:10px;color:var(--stock)}

/* projects */
.projects{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,2.5vw,32px)}
.proj{display:flex;flex-direction:column}
.proj a.zoom{display:block;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.proj a.zoom:hover{border-color:var(--red)}
.proj h3{margin-top:16px;font-size:26px}
.proj p{font-size:16px;color:var(--ink-2)}
.tags{list-style:none;margin:0 0 4px;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.tags li{margin:0;font-size:14px;line-height:1;padding:7px 10px;border:1px solid var(--line);border-radius:999px;color:var(--ink-2);background:#fff}
.proj-row{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(24px,4vw,56px);align-items:center;padding:clamp(32px,4vw,48px) 0;border-bottom:1px solid var(--line)}
.proj-row:last-child{border-bottom:0}
.proj-row h2{font-size:clamp(30px,3.4vw,44px)}
.result{display:flex;flex-wrap:wrap;gap:12px 28px;margin:6px 0 16px}
.result b{white-space:nowrap}
.result div{font-size:14px;color:var(--steel);line-height:1.3}
.result b{display:block;font:800 34px/1 var(--display);color:var(--ink)}

/* checks */
.checks{list-style:none;margin:0 0 1em;padding:0;display:grid;gap:10px}
.checks li{margin:0;padding-left:32px;position:relative}
.checks li::before{content:"";position:absolute;left:2px;top:6px;width:16px;height:9px;border-left:3px solid var(--red);border-bottom:3px solid var(--red);transform:rotate(-45deg)}
.benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:3px solid var(--ink);margin-bottom:clamp(40px,5vw,64px)}
.benefits div{padding:18px 20px 0 0}
.benefits h3{font-size:26px;margin-bottom:.3em}
.benefits p{font-size:16px;color:var(--steel);margin:0}

.warn{border-left:4px solid var(--red);background:#fff;padding:22px 24px;border-radius:0 var(--radius) var(--radius) 0;box-shadow:0 0 0 1px var(--line) inset}
.warn h3{font-size:24px}
.notice{border-left:4px solid var(--red);background:#fdeff0;padding:16px 20px;border-radius:0 var(--radius) var(--radius) 0;margin:0 0 1.4em}
.notice p{margin:0}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.gallery figure{margin:0}
.gallery a{display:block;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#fff}
.gallery a:hover{border-color:var(--red)}
.gallery img{width:100%;aspect-ratio:3/4;object-fit:cover}
.gallery figcaption{font-size:14px;color:var(--steel);line-height:1.35;margin-top:6px}
@media (max-width:860px){.gallery,.gallery-3{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* video (click-to-load) */
.yt{position:relative;display:block;border-radius:var(--radius);overflow:hidden;background:#000;aspect-ratio:16/9}
.yt img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:opacity .2s}
.yt:hover img{opacity:1}
.yt-play{position:absolute;left:50%;top:50%;width:76px;height:54px;margin:-27px 0 0 -38px;background:var(--red);border-radius:14px}
.yt-play::after{content:"";position:absolute;left:31px;top:15px;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent #fff}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-split{align-items:center}
.yt-card{position:absolute;inset:0;display:flex;align-items:flex-end;padding:20px 22px;background-color:var(--ink);background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);background-size:32px 32px}
.yt-card span{font:800 clamp(20px,2.2vw,28px)/1.05 var(--display);text-transform:uppercase;color:#fff;max-width:80%}

/* exhaust projects */
.exh{padding-bottom:clamp(32px,4vw,48px);margin-bottom:clamp(32px,4vw,48px);border-bottom:1px solid var(--line)}
.exh:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.exh .gallery{margin-top:24px}
.gallery-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.gallery-3 img{aspect-ratio:4/3}
.sr-section{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* service variants */
.variants{display:grid;grid-template-columns:1fr 1.25fr;gap:20px;align-items:start}
.variant{border:1px solid var(--line);border-top:4px solid var(--stock);border-radius:var(--radius);padding:24px 26px;background:#fff}
.variant-full{border-top-color:var(--red)}
.variant h3{margin-bottom:.1em}
.variant .muted{margin-bottom:1em}
.variants-3{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch}
.variant p:last-child{margin-bottom:0}
@media (max-width:860px){.variants,.variants-3{grid-template-columns:1fr}}

/* FAQ */
.faq{max-width:860px}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:20px 44px 20px 0;position:relative;font:600 19px/1.35 var(--text)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:14px;height:14px;margin-top:-7px;background:linear-gradient(var(--red),var(--red)) center/14px 2.5px no-repeat,linear-gradient(var(--red),var(--red)) center/2.5px 14px no-repeat;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details > div{padding:0 0 18px}
.faq details p{color:var(--ink-2)}

/* Page head (subpages) */
.page-head{border-bottom:1px solid var(--line)}
.page-head .wrap{padding-bottom:clamp(36px,5vw,64px)}
.page-head h1{margin-top:clamp(18px,3vw,36px);max-width:16ch}
.page-head.wide h1{max-width:none}
.page-head .lead{max-width:60ch}

/* related */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related a{display:block;padding:20px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;color:var(--ink)}
.related a:hover{border-color:var(--red)}
.related strong{display:block;font:800 24px/1.05 var(--display);text-transform:uppercase;margin-bottom:6px}
.related span{font-size:15px;color:var(--steel);line-height:1.4;display:block}

/* CTA band */
.cta-band{background:var(--ink);color:#fff}
.cta-band .wrap{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(24px,4vw,64px);align-items:center;padding-top:clamp(48px,7vw,88px);padding-bottom:clamp(48px,7vw,88px)}
.cta-band h2{color:#fff}
.cta-band p{color:#c9d1dc}
.cta-phone{display:block;font:800 clamp(46px,6.5vw,84px)/1 var(--display);color:#fff;text-decoration:none;letter-spacing:.01em}
.cta-phone:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--red);text-decoration-thickness:4px}
.cta-mail{display:inline-block;font-size:21px;color:#fff;margin-top:10px}
.cta-mail:hover{color:#fff}
.cta-reviews{margin:14px 0 0}
.cta-reviews a{color:#fff;display:inline-flex;align-items:center;gap:8px}
.cta-reviews a:hover{color:#fff}
.stars{width:18px;height:18px;color:#f5b301;flex:none}
.cta-band .appt{color:#c9d1dc;margin-top:18px}

/* contact page */
.contact-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(28px,5vw,72px);align-items:start}
.contact-grid h2{font-size:clamp(24px,2.4vw,30px)}
.contact-big{font:800 clamp(28px,2.8vw,36px)/1 var(--display);color:var(--ink);text-decoration:none;display:inline-block;margin:6px 0 10px}
.contact-big:hover{color:var(--red)}
.dl{margin:0}
.dl dt{font-weight:600;margin-top:18px}
.dl dd{margin:2px 0 0}
.social{display:flex;gap:12px;margin-top:22px}
.social a{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius);color:var(--ink)}
.social a:hover{border-color:var(--red);color:var(--red)}
.social svg{width:22px;height:22px}

.legal{max-width:860px;font-size:17px}
.legal p{max-width:none}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-2);color:#c9d1dc;font-size:16px}
.site-footer a{color:#fff;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-top:56px;padding-bottom:40px}
.foot img{width:180px;margin-bottom:16px}
.foot h2{font:600 15px/1.2 var(--text);text-transform:none;color:#8f9bad;margin:4px 0 14px;letter-spacing:.02em}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin-bottom:8px}
.foot p{margin:0 0 .6em}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:18px;padding-bottom:18px;font-size:14px;color:#8f9bad;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}

/* mobile call bar */
.callbar{display:none}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .nav-toggle{display:block}
  .header-call{display:none}
  .nav{position:absolute;left:0;right:0;top:var(--header-h);background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(15,27,45,.12);display:none;max-height:calc(100vh - var(--header-h));overflow:auto}
  .nav-open .nav{display:block}
  .menu{flex-direction:column;align-items:stretch;padding:8px var(--gutter) 16px}
  .menu > li > a,.menu > li > button{padding:15px 0;font-size:18px;width:100%;text-align:left;border-bottom:1px solid var(--line);border-radius:0}
  .sub{position:static;box-shadow:none;border:0;padding:4px 0 8px 14px;min-width:0}
  .nav-open .nav-toggle span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .nav-open .nav-toggle span:nth-child(2){opacity:0}
  .nav-open .nav-toggle span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .svc-groups{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:repeat(3,1fr);row-gap:28px}
  .projects{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  :root{--header-h:66px}
  body{font-size:17px;padding-bottom:64px}
  h1,h2{overflow-wrap:break-word}
  .logo img{width:160px}
  .hero .wrap,.split,.split-5-7,.cta-band .wrap,.contact-grid,.proj-row{grid-template-columns:minmax(0,1fr)}
  .facts ul{grid-template-columns:1fr 1fr}
  .facts li{padding:16px 14px 16px 0;border-left:0;border-top:1px solid rgba(255,255,255,.14)}
  .facts li:nth-child(-n+2){border-top:0}
  .svc-groups,.related,.benefits{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .projects{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr 1fr}
  .rung{grid-template-columns:1fr;gap:6px}
  .split .figure.first-m{order:-1}
  .callbar{display:grid;grid-template-columns:1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(15,27,45,.1);padding:8px;gap:8px;padding-bottom:max(8px,env(safe-area-inset-bottom))}
  .callbar a{justify-content:center;padding:13px 10px}
}
@media (max-width:520px){
  .facts ul{grid-template-columns:1fr}
  .facts li:nth-child(2){border-top:1px solid rgba(255,255,255,.14)}
  .steps{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr}
  .btn-row .btn{flex:1 1 100%;justify-content:center}
  .dyno{padding:12px 10px 10px}
  .dyno-stats b{font-size:22px;white-space:nowrap}
  .result b{font-size:28px}
  .result{gap:10px 22px}
  .dyno-stats{grid-template-columns:1fr 1fr}
  .result{gap:20px}
}
@media print{.site-header,.callbar,.cta-band,.site-footer{display:none}}