/* Аргумент Проект — dark tech theme
   bg #08111D  deep #0C1A2B  text #E6EDF5  mute #8DA0B6  fire #FF4B3E  air #3FD0FF  water #4C7DFF */
:root{
  --bg:#08111D; --deep:#0C1A2B; --text:#E6EDF5; --mute:#8DA0B6; --line:rgba(160,190,230,.14);
  --glass:rgba(255,255,255,.035); --glass-b:rgba(255,255,255,.09);
  --fire:#FF4B3E; --fire-2:#FF7A45; --air:#3FD0FF; --water:#4C7DFF;
  --h:"Unbounded","Manrope",system-ui,sans-serif; --f:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --w:1240px; --gap:clamp(18px,3vw,36px); --r:18px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.65 var(--f);overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(900px 600px at 85% -10%,rgba(63,208,255,.13),transparent 60%),
             radial-gradient(700px 500px at -10% 30%,rgba(255,75,62,.08),transparent 60%),
             linear-gradient(var(--bg),var(--bg))}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration-color:rgba(230,237,245,.35);text-underline-offset:3px}
a:hover{color:var(--air)}
:focus-visible{outline:2px solid var(--air);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--gap)}
h1,h2,h3{font-family:var(--h);font-weight:600;line-height:1.12;margin:0 0 .55em;letter-spacing:-.01em}
h1{font-size:clamp(32px,4.6vw,58px);max-width:15ch}
h2{font-size:clamp(24px,3vw,38px);max-width:24ch}
h3{font-family:var(--f);font-weight:700;font-size:19px;letter-spacing:0}
p{margin:0 0 1em;max-width:66ch}
.lead{font-size:clamp(17px,1.5vw,20px);color:var(--mute);max-width:58ch}
section{padding:clamp(64px,9vw,120px) 0;position:relative}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(8,17,29,.72);backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:28px;min-height:70px}
.logo{font-family:var(--h);font-weight:600;font-size:17px;text-decoration:none;display:flex;align-items:center;gap:10px}
.logo svg{width:34px;height:34px}
.nav{display:flex;gap:26px;margin-left:auto;font-size:15px}
.nav a{text-decoration:none;color:var(--mute)}
.nav a:hover,.nav a[aria-current]{color:var(--text)}
.top .tel{font-weight:700;text-decoration:none;white-space:nowrap;padding:9px 16px;border:1px solid var(--glass-b);border-radius:999px;background:var(--glass)}
.burger{display:none;margin-left:auto;background:var(--glass);border:1px solid var(--glass-b);border-radius:999px;padding:8px 16px;font:inherit;font-size:15px;color:var(--text)}
@media (max-width:920px){
  .nav{display:none;position:absolute;left:0;right:0;top:70px;background:rgba(8,17,29,.97);flex-direction:column;padding:18px var(--gap) 26px;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}.nav a{font-size:18px}
  .burger{display:block}.top .tel{display:none}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:54px;padding:0 28px;border-radius:999px;border:0;
  background:linear-gradient(135deg,var(--fire),var(--fire-2));color:#fff;font:700 16px var(--f);text-decoration:none;cursor:pointer;
  box-shadow:0 8px 30px -8px rgba(255,75,62,.65);transition:transform .15s,box-shadow .15s}
.btn:hover{color:#fff;transform:translateY(-1px);box-shadow:0 12px 36px -8px rgba(255,75,62,.8)}
.btn.ghost{background:var(--glass);border:1px solid var(--glass-b);box-shadow:none;color:var(--text)}
.btn.ghost:hover{border-color:rgba(63,208,255,.5);color:var(--text)}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

/* hero */
.hero{padding-top:clamp(36px,6vw,72px);padding-bottom:clamp(48px,7vw,96px)}
.hero .grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(16px,4vw,48px);align-items:center}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--mute);padding:6px 14px;border:1px solid var(--glass-b);border-radius:999px;background:var(--glass);margin-bottom:22px}
.badge i{width:8px;height:8px;border-radius:50%;background:#3EE08F;box-shadow:0 0 10px #3EE08F}
.facts{display:grid;grid-template-columns:repeat(3,auto);justify-content:start;gap:12px 40px;margin-top:40px}
.facts b{display:block;font-family:var(--h);font-weight:600;font-size:clamp(24px,2.4vw,32px);
  background:linear-gradient(90deg,#fff,var(--air));-webkit-background-clip:text;background-clip:text;color:transparent}
.facts span{font-size:14px;color:var(--mute)}
@media (max-width:980px){.hero .grid{grid-template-columns:1fr}.hero .visual{order:-1;max-width:520px;margin:0 auto}}
@media (max-width:520px){.facts{grid-template-columns:1fr 1fr}}

/* BIM model */
.visual{position:relative}
.visual::before{content:"";position:absolute;inset:12% 8%;background:radial-gradient(closest-side,rgba(63,208,255,.22),transparent);filter:blur(30px);z-index:-1}
.bim .grid{stroke:rgba(63,208,255,.10);stroke-width:1}
.bim .slab{fill:url(#slab);stroke:rgba(63,208,255,.45);stroke-width:1.2}
.bim .edge{stroke:rgba(200,225,255,.35);stroke-width:1.2}
.bim .net{fill:none;stroke-width:2.2;stroke-linecap:round;filter:url(#glow);stroke-dasharray:600;stroke-dashoffset:600;animation:draw 2.2s ease-out forwards;animation-delay:var(--d,0s)}
.bim .fire{stroke:var(--fire)}.bim .air{stroke:var(--air);stroke-width:4;opacity:.85}.bim .water{stroke:var(--water)}
.bim .riser{stroke-width:3;animation-delay:0s}
.bim .spr{fill:var(--fire);opacity:.9}
.bim .det{fill:none;stroke:#FFD34E;stroke-width:1.6;animation:pulse 2.6s ease-in-out infinite;animation-delay:var(--d,0s);transform-box:fill-box;transform-origin:center}
.bim .tag{font:700 13px var(--f);letter-spacing:.04em}
.bim .tag.fire{fill:var(--fire);stroke:none}.bim .tag.air{fill:var(--air);stroke:none}.bim .tag.water{fill:var(--water);stroke:none}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes pulse{0%,100%{opacity:.35;transform:scale(1)}50%{opacity:1;transform:scale(1.5)}}
@media (prefers-reduced-motion:reduce){.bim .net{animation:none;stroke-dashoffset:0}.bim .det{animation:none;opacity:.8}.btn{transition:none}}

/* section heads */
.head{display:flex;justify-content:space-between;align-items:end;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.head p{margin:0}

/* glass cards — services */
.group{margin-top:28px}
.group h3{font-family:var(--h);font-weight:500;font-size:15px;color:var(--mute);margin:0 0 14px;display:flex;align-items:center;gap:10px}
.group h3::before{content:"";width:22px;height:2px;background:var(--c,var(--air));box-shadow:0 0 8px var(--c,var(--air))}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.card{position:relative;display:flex;flex-direction:column;gap:10px;padding:24px;border-radius:var(--r);text-decoration:none;
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));border:1px solid var(--glass-b);
  backdrop-filter:blur(8px);transition:border-color .2s,transform .2s;overflow:hidden}
.card::after{content:"";position:absolute;inset:auto -30% -60% auto;width:200px;height:200px;border-radius:50%;
  background:radial-gradient(closest-side,var(--c,var(--air)),transparent);opacity:.0;transition:opacity .25s}
.card:hover{border-color:color-mix(in srgb,var(--c,var(--air)) 55%,transparent);transform:translateY(-3px);color:var(--text)}
.card:hover::after{opacity:.18}
.card .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:color-mix(in srgb,var(--c,var(--air)) 14%,transparent);color:var(--c,var(--air))}
.card .ico svg{width:24px;height:24px}
.card .mark{position:absolute;top:22px;right:22px;font:600 12px var(--h);color:var(--mute)}
.card .name{font-weight:700;font-size:18px;line-height:1.3}
.card .short{font-size:15px;color:var(--mute);flex:1}
.card .price{font-size:14px;color:var(--text);opacity:.8}
.fire-g{--c:var(--fire)}.eng-g{--c:var(--air)}

/* panels */
.panel{border-radius:var(--r);border:1px solid var(--glass-b);background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));padding:clamp(22px,3vw,36px)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:start}
@media (max-width:900px){.two{grid-template-columns:1fr}}

.sheetlist{list-style:none;padding:0;margin:0;counter-reset:l}
.sheetlist li{display:flex;gap:16px;padding:14px 0;border-bottom:1px solid var(--line);counter-increment:l}
.sheetlist li:last-child{border-bottom:0}
.sheetlist li::before{content:counter(l,decimal-leading-zero);font:600 13px var(--h);color:var(--air);padding-top:3px;min-width:26px}

.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.cols>div{border-radius:var(--r);border:1px solid var(--glass-b);background:var(--glass);padding:26px}
.cols p{color:var(--mute);font-size:16px;margin:0}
@media (max-width:860px){.cols{grid-template-columns:1fr}}

/* steps timeline */
.steps{counter-reset:s;list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative}
.steps::before{content:"";position:absolute;left:0;right:0;top:22px;height:2px;background:linear-gradient(90deg,var(--air),var(--fire));opacity:.5}
.steps li{counter-increment:s;position:relative;padding-top:64px}
.steps li::before{content:counter(s);position:absolute;top:0;left:0;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  font:600 16px var(--h);background:var(--deep);border:1.5px solid var(--air);box-shadow:0 0 18px rgba(63,208,255,.35)}
.steps li:last-child::before{border-color:var(--fire);box-shadow:0 0 18px rgba(255,75,62,.45)}
.steps p{font-size:15px;color:var(--mute)}
@media (max-width:980px){.steps{grid-template-columns:1fr 1fr}.steps::before{display:none}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

/* service page */
.crumbs{font-size:14px;color:var(--mute);margin-bottom:22px}
.crumbs a{color:var(--mute)}
.svc-grid{display:grid;grid-template-columns:1.45fr .8fr;gap:clamp(24px,5vw,64px);align-items:start}
.svc-grid h2{font-size:clamp(21px,2.2vw,28px);margin-top:1.6em}
.svc-grid ul:not(.norms){list-style:none;padding:0}
.svc-grid ul:not(.norms) li{position:relative;padding:10px 0 10px 30px;border-bottom:1px solid var(--line)}
.svc-grid ul:not(.norms) li::before{content:"";position:absolute;left:4px;top:19px;width:10px;height:10px;border-radius:3px;background:var(--air);box-shadow:0 0 10px var(--air)}
.aside{position:sticky;top:96px}
.aside dl{margin:0 0 22px;display:grid;grid-template-columns:auto 1fr;gap:10px 18px;font-size:15px}
.aside dt{color:var(--mute)}.aside dd{margin:0;font-weight:700}
.norms{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0}
.norms li{border:1px solid var(--glass-b);border-radius:999px;padding:6px 14px;font-size:14px;background:var(--glass)}
@media (max-width:920px){.svc-grid{grid-template-columns:1fr}.aside{position:static}}

details{border-bottom:1px solid var(--line);padding:18px 0;max-width:860px}
details summary{cursor:pointer;font-weight:700;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";color:var(--air);font-size:24px;line-height:1}
details[open] summary::after{content:"−"}
details p{margin:12px 0 0;color:var(--mute)}

table.prices{width:100%;border-collapse:collapse;margin-top:30px}
.prices th,.prices td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line)}
.prices th{font-size:13px;color:var(--mute);font-weight:600}
.prices td:last-child{white-space:nowrap;font-weight:700}
.prices tr:hover td{background:var(--glass)}

/* request */
.request .box{position:relative;border-radius:28px;padding:clamp(26px,5vw,60px);overflow:hidden;border:1px solid var(--glass-b);
  background:radial-gradient(600px 300px at 100% 0%,rgba(255,75,62,.18),transparent 70%),radial-gradient(500px 300px at 0% 100%,rgba(63,208,255,.14),transparent 70%),var(--deep)}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px;max-width:860px}
.form label{display:flex;flex-direction:column;gap:7px;font-size:14px;color:var(--mute)}
.form .full{grid-column:1/-1}
.form input,.form select,.form textarea{font:inherit;font-size:16px;padding:14px 16px;border-radius:12px;border:1px solid var(--glass-b);background:rgba(8,17,29,.6);color:var(--text)}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--air);box-shadow:0 0 0 3px rgba(63,208,255,.18)}
.form textarea{min-height:100px;resize:vertical}
.form input[type=file]{padding:11px}
.form .consent{flex-direction:row;align-items:flex-start;gap:10px}
.form .consent input{width:20px;height:20px;margin-top:2px;flex:none;accent-color:var(--fire)}
.form .hp{position:absolute;left:-9999px}
.form .msg{grid-column:1/-1;min-height:1.5em;font-weight:700;margin:0}
.form .msg.ok{color:#5BE39A}.form .msg.err{color:#FF8A80}
.quick{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
@media (max-width:640px){.form{grid-template-columns:1fr}}

/* footer */
.foot{border-top:1px solid var(--line);padding:48px 0 36px;margin-top:24px}
.foot .cols4{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.foot small{display:block;color:var(--mute);font-size:13px;margin-bottom:6px}
.foot a{text-decoration:none}
.foot .legal{font-size:13px;color:var(--mute);margin-top:32px;display:flex;flex-wrap:wrap;gap:8px 24px}
@media (max-width:820px){.foot .cols4{grid-template-columns:1fr 1fr}}

.callbar{display:none}
@media (max-width:640px){
  .callbar{display:grid;grid-template-columns:1fr 1fr;gap:8px;position:fixed;left:10px;right:10px;bottom:10px;z-index:30}
  .callbar a{display:flex;align-items:center;justify-content:center;min-height:52px;border-radius:999px;font-weight:700;text-decoration:none;background:rgba(12,26,43,.92);border:1px solid var(--glass-b);backdrop-filter:blur(10px)}
  .callbar a:first-child{background:linear-gradient(135deg,var(--fire),var(--fire-2));border:0}
  body{padding-bottom:76px}
}
.prose{max-width:800px}
.prose h2{margin-top:1.4em;font-size:clamp(21px,2.2vw,28px)}

/* ---- review fixes 09.11 ---- */
.btn{background:linear-gradient(135deg,#D92D20,#C2410C)}
.callbar a:first-child{background:linear-gradient(135deg,#D92D20,#C2410C)}
.bim{width:100%;height:auto}
.cards{grid-template-columns:repeat(5,1fr)}
.card .short{font-size:14px}
@media (max-width:1100px){.cards{grid-template-columns:repeat(3,1fr)}}
@media (max-width:760px){.cards{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.cards{grid-template-columns:1fr}}
.card:focus-visible{outline-offset:-3px}
.form input,.form select,.form textarea{border-color:rgba(160,190,230,.38)}
.form ::placeholder{color:#7F93AA;opacity:1}
.form input:focus,.form select:focus,.form textarea:focus{box-shadow:0 0 0 3px rgba(63,208,255,.4)}
.form .consent input{width:24px;height:24px}
.nav a{padding:10px 0}
.burger{min-height:44px}
.crumbs a{display:inline-block;padding:10px 0}
.hero{padding-bottom:clamp(40px,5vw,72px)}
@media (max-width:520px){.facts{grid-template-columns:repeat(3,auto);gap:12px 20px}.facts b{font-size:20px}.facts span{font-size:12px}}
@media (max-width:640px){.callbar{bottom:calc(10px + env(safe-area-inset-bottom))}body{padding-bottom:calc(76px + env(safe-area-inset-bottom))}}
.skip{position:absolute;left:-9999px;top:8px;z-index:50;padding:10px 16px;border-radius:999px;background:var(--air);color:#08111D;font-weight:700}
.skip:focus{left:12px}

/* ---- brand review fixes 09.11 23:10 ---- */
.form .consent input{accent-color:var(--air)}
.form .file{flex-direction:row;flex-wrap:wrap;align-items:center;gap:8px 14px;position:relative}
.form .file>span:first-child{width:100%}
.form .file input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}
.form .file .fbtn{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;border-radius:999px;border:1px dashed rgba(160,190,230,.5);color:var(--text);font-weight:700}
.form .file:focus-within .fbtn{border-color:var(--air);box-shadow:0 0 0 3px rgba(63,208,255,.35)}
.form .file .fname{font-size:13px}
@media (max-width:980px){.hero .visual{order:0;max-width:440px}}
@media (max-width:520px){.hero .visual{max-width:300px}}
.card .name{text-wrap:balance}

/* ===== CAD workspace (Аргумент Проект, 09.11 23:15) ===== */
body::before{background:
  linear-gradient(rgba(63,208,255,.045) 1px,transparent 1px) 0 0/24px 24px,
  linear-gradient(90deg,rgba(63,208,255,.045) 1px,transparent 1px) 0 0/24px 24px,
  linear-gradient(rgba(63,208,255,.07) 1px,transparent 1px) 0 0/120px 120px,
  linear-gradient(90deg,rgba(63,208,255,.07) 1px,transparent 1px) 0 0/120px 120px,
  radial-gradient(900px 600px at 85% -10%,rgba(63,208,255,.12),transparent 60%),
  radial-gradient(700px 500px at -10% 30%,rgba(255,75,62,.07),transparent 60%),#08111D}
.ws{padding-top:clamp(28px,4vw,56px)}
.ws-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(20px,4vw,56px);align-items:start}
.hero-copy{min-height:calc(100vh - 140px);display:flex;flex-direction:column;justify-content:center;padding-bottom:40px}
.scrollhint{margin-top:34px;font-size:14px;color:var(--mute);display:flex;align-items:center;gap:10px}
.scrollhint::before{content:"";width:28px;height:1px;background:var(--air)}
.layers{padding-bottom:20vh}
.lt{font-size:clamp(22px,2.4vw,30px);margin-bottom:28px}
.lstep{position:relative;padding:26px 26px 26px 28px;margin:0 0 18px;border-radius:16px;border:1px solid var(--glass-b);
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.012));transition:border-color .3s,background .3s,transform .3s}
.lstep::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:3px;background:var(--c);opacity:.35;transition:opacity .3s}
.lstep.on{border-color:color-mix(in srgb,var(--c) 55%,transparent);background:linear-gradient(180deg,color-mix(in srgb,var(--c) 9%,transparent),rgba(255,255,255,.01))}
.lstep.on::before{opacity:1;box-shadow:0 0 14px var(--c)}
.lhead{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--mute);margin-bottom:10px}
.lhead .sw{width:10px;height:10px;border-radius:3px;background:var(--c);box-shadow:0 0 10px var(--c)}
.lhead .lmark{font:600 13px var(--h);color:var(--text)}
.lhead .lno{margin-left:auto}
.lstep h3{font-family:var(--h);font-weight:500;font-size:clamp(18px,1.6vw,22px);margin:0 0 8px}
.lstep h3 a{text-decoration:none}
.lstep p{color:var(--mute);font-size:15.5px;margin:0 0 12px}
.lmore{font-size:14px;color:var(--text);text-decoration-color:color-mix(in srgb,var(--c) 70%,transparent)}
.ws-model{position:relative;height:100%}
.model-sticky{position:sticky;top:86px}
.model-frame{border:1px solid var(--glass-b);border-radius:20px;background:rgba(8,17,29,.55);backdrop-filter:blur(6px);padding:14px 16px 16px;position:relative}
.model-frame::before,.model-frame::after{content:"";position:absolute;width:18px;height:18px;border:2px solid var(--air);opacity:.7}
.model-frame::before{top:-1px;left:-1px;border-right:0;border-bottom:0;border-top-left-radius:20px}
.model-frame::after{bottom:-1px;right:-1px;border-left:0;border-top:0;border-bottom-right-radius:20px}
.mf-top{display:flex;justify-content:space-between;font-size:13px;color:var(--mute);padding:2px 4px 6px}
.mf-top [data-hud-layer]{color:var(--text);font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.chip{font:600 12px var(--h);color:var(--mute);background:transparent;border:1px solid var(--glass-b);border-radius:999px;padding:7px 11px;min-height:34px;cursor:pointer}
.chip:hover,.chip.on{color:var(--text);border-color:var(--c,var(--air));box-shadow:inset 0 0 0 1px var(--c,var(--air))}
/* model layers */
.bim{width:100%;height:auto;overflow:visible}
.bim .grid{stroke:rgba(63,208,255,.09);stroke-width:1}
.bim .slab{fill:rgba(63,208,255,.035);stroke:rgba(160,200,240,.38);stroke-width:1.1}
.bim .edge{stroke:rgba(200,225,255,.28);stroke-width:1.1}
.bim .core{stroke:rgba(200,225,255,.16);stroke-width:1;fill:none}
.bim .sys{opacity:.13;transition:opacity .45s,filter .45s}
.bim.all .sys{opacity:.62}
.bim .sys.on{opacity:1;filter:drop-shadow(0 0 5px var(--c))}
.bim .ln{fill:none;stroke:var(--c);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.bim .thin{stroke-width:1.4}.bim .dash{stroke-dasharray:5 4}.bim .riser{stroke-width:3}
.bim .duct{stroke-width:5;opacity:.9}.bim .tray{stroke-width:4;stroke-dasharray:2 3}
.bim .arrow{stroke-width:2.4;stroke-dasharray:7 5}
.bim .sys.on .arrow{animation:flow 1.2s linear infinite}
.bim .sys.on .link{animation:flow 1.6s linear infinite}
@keyframes flow{to{stroke-dashoffset:-24}}
.bim .hd,.bim .grille,.bim .spk,.bim .lamp,.bim .cam{fill:var(--c);stroke:none}
.bim .det{fill:#08111D;stroke:var(--c);stroke-width:1.8}
.bim .sys.on .det{animation:blink 2.4s ease-in-out infinite}
@keyframes blink{50%{fill:var(--c)}}
.bim .exit{fill:#3EE08F}
.bim .wave{stroke-width:1.2}
.bim .eq polygon{fill:color-mix(in srgb,var(--c) 22%,#08111D);stroke:var(--c);stroke-width:1}
.bim .det,.bim .bim{transform-box:fill-box}
/* service page: solo model */
.solo{margin:-6px -6px 18px;padding:6px;border-bottom:1px solid var(--line)}
.solo .bim .sys{opacity:.08}.solo .bim .sys.on{opacity:1}
/* HUD + crosshair */
.hud{position:fixed;left:16px;bottom:14px;z-index:40;display:flex;gap:14px;padding:7px 12px;border-radius:10px;font:500 12px var(--f);
  color:var(--mute);background:rgba(8,17,29,.8);border:1px solid var(--glass-b);backdrop-filter:blur(8px);font-variant-numeric:tabular-nums;pointer-events:none}
.hud [data-hud-layer2]{color:var(--text)}
.xh{position:fixed;z-index:39;pointer-events:none;background:rgba(63,208,255,.22);display:none}
.xh-v{top:0;bottom:0;width:1px}.xh-h{left:0;right:0;height:1px}
@media (pointer:fine){body.cad .xh{display:block}}
@media (pointer:coarse),(max-width:900px){.hud,.xh{display:none!important}}
@media (prefers-reduced-motion:reduce){.bim .sys.on .arrow,.bim .sys.on .link,.bim .sys.on .det{animation:none}.xh{display:none!important}}
@media (max-width:980px){
  .ws-grid{grid-template-columns:1fr}
  .ws-model{order:-1;position:sticky;top:70px;z-index:5;margin:0 calc(-1*var(--gap))}
  .model-sticky{position:static}
  .model-frame{border-radius:0;border-left:0;border-right:0;padding:6px 10px 8px;background:rgba(8,17,29,.92)}
  .model-frame .bim{max-height:24vh}
  .chips{display:none}
  .hero-copy{min-height:auto;padding-top:20px}
}

/* ---- CAD review fixes 09.11 23:40 ---- */
.hero-copy h1{font-size:clamp(32px,4vw,52px);max-width:18ch}
.hero-copy{min-height:calc(100vh - 170px)}
.model-frame{backdrop-filter:none;background:rgba(8,17,29,.82)}
.bim .sys{opacity:.18}
.chip{border-color:rgba(160,190,230,.3)}
.chip[aria-pressed="true"]{color:var(--text);border-color:var(--c,var(--air));box-shadow:inset 0 0 0 1px var(--c,var(--air));font-weight:700}
.chip[aria-pressed="true"]::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--c,var(--air));margin-right:6px;vertical-align:middle}
.chip:focus-visible,.lstep:focus-within{outline:2px solid var(--air);outline-offset:2px}
.hud{opacity:0;transition:opacity .3s;right:16px;left:auto}
body.cad-moved .hud{opacity:1}
@media (max-width:980px){
  .chips{display:flex;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:6px -10px 0;padding:0 10px 2px}
  .chips::-webkit-scrollbar{display:none}
  .chip{flex:none;min-height:36px}
  .model-frame .bim{max-height:20vh}
  .mf-top{padding:0 2px 2px;font-size:12px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.bim .sys,.lstep,.chip{transition:none}}
.ws-grid>*{min-width:0}
@media (max-width:980px){
  .model-frame{background:#08111D;overflow:hidden}
  .chips{margin:6px 0 0;padding:0 0 2px}
  .ws-model{margin:0 calc(-1*var(--gap));width:auto}
}
/* logo: approved stacked «Росчерк циркуля» */
.logo svg{width:auto;height:58px}
.logo-f svg{height:72px}
@media(max-width:640px){.logo svg{height:48px}}
/* chat logo slot */
.ch-logo{display:inline-block;width:32px;height:32px;border-radius:9px;background:url(favicon.svg) center/cover no-repeat;flex:none}
/* chat integration */
.hud{right:96px}
#ch-root .ch-logo,.ch-panel .ch-logo,body .ch-logo{background:url(favicon.svg) center/cover no-repeat;border:0}

/* ---- Fable polish 10.11 ---- */
h1,h2,h3{text-wrap:balance}.lead,.lstep p{text-wrap:pretty}
section{padding:clamp(48px,6vw,84px) 0}
.request{padding-top:clamp(20px,3vw,44px)}
.layers{padding-bottom:4vh}
.mute{color:var(--mute)}
.nh{font-size:clamp(21px,2.2vw,28px);margin-top:1.8em}
/* hero facts */
.facts{grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:36px;max-width:580px;border-top:1px solid var(--line)}
.facts div{padding:16px 16px 0 0}
.facts span{display:block;max-width:19ch;line-height:1.4}
.facts.col{grid-template-columns:1fr;border-top:0;margin:0 0 8px}
.facts.col div{padding:0 0 16px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.facts.col span{max-width:none}
@media (max-width:520px){.facts{grid-template-columns:repeat(3,minmax(0,1fr));gap:0}.facts div{padding-right:10px}}
/* wider model column on the home workspace */
@media (min-width:981px){.ws-grid{grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr)}}
/* drawing title block under the model */
.stamp{display:grid;grid-template-columns:auto minmax(0,1fr) repeat(5,auto);margin-top:8px;border:1px solid rgba(160,190,230,.28);border-radius:8px;overflow:hidden;font-variant-numeric:tabular-nums}
.stamp>div{padding:6px 12px 7px;border-left:1px solid rgba(160,190,230,.28);min-width:0}
.stamp>div:first-child{border-left:0}
.stamp small{display:block;font-size:10.5px;line-height:1.3;color:var(--mute)}
.stamp b{display:block;font:500 12.5px/1.35 var(--h);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stamp .st-mark{background:color-mix(in srgb,var(--c,var(--air)) 16%,transparent);transition:background .3s}
.stamp .st-mark b{color:var(--c,var(--air))}
.mf-top span:last-child{color:var(--mute)}
@media (max-width:1180px){.stamp .st-org{display:none}.stamp{grid-template-columns:minmax(0,1fr) repeat(5,auto)}.stamp .st-name{border-left:0}}
@media (max-width:980px){
  .ws .mf-top{display:none}
  .stamp{grid-template-columns:minmax(0,1fr) auto auto;margin-top:4px;border-radius:6px}
  .stamp .st-x{display:none}.stamp .st-name{border-left:0}
  .stamp>div{padding:3px 9px 4px}.stamp small{font-size:9.5px}.stamp b{font-size:11.5px}
}
/* service page */
.svc-top{display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);gap:clamp(20px,4vw,56px);align-items:center}
.svc-top h1{font-size:clamp(28px,3.4vw,44px);max-width:22ch}
.spec{display:grid;grid-template-columns:repeat(4,auto);justify-content:start;margin:26px 0 24px;border:1px solid var(--glass-b);border-radius:14px;overflow:hidden;background:var(--glass)}
.spec div{padding:11px 18px 12px;border-left:1px solid var(--glass-b)}
.spec div:first-child{border-left:0;background:color-mix(in srgb,var(--c) 14%,transparent)}
.spec div:first-child dd{color:var(--c)}
.spec dt{font-size:12.5px;color:var(--mute)}
.spec dd{margin:0;font:500 14.5px/1.35 var(--h)}
.promise{font-size:14px;color:var(--mute);margin:16px 0 0}
.svc-model .bim .sys{opacity:.1}.svc-model .bim .sys.on{opacity:1}
.svc-model{--air2:var(--c)}
.svc-cols{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:start}
.svc-cols h2{font-size:clamp(21px,2.2vw,28px)}
.svc-cols ul{list-style:none;padding:0;margin:0}
.svc-cols ul li{position:relative;padding:12px 0 12px 30px;border-bottom:1px solid var(--line)}
.svc-cols ul li::before{content:"";position:absolute;left:4px;top:21px;width:10px;height:10px;border-radius:3px;background:var(--c);box-shadow:0 0 10px var(--c)}
.svc .sheetlist li::before{color:var(--c)}
.svc .sheetlist li{padding:12px 0}
@media (max-width:920px){.svc-top,.svc-cols{grid-template-columns:1fr}.spec{grid-template-columns:1fr 1fr}.spec div:nth-child(3){border-left:0}.spec div:nth-child(n+3){border-top:1px solid var(--glass-b)}}
/* section navigation chips */
.sysnav{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;margin-top:6px}
.sysnav a{display:flex;align-items:baseline;gap:10px;padding:12px 14px;border-radius:12px;border:1px solid var(--glass-b);background:var(--glass);text-decoration:none;transition:border-color .2s,background .2s}
.sysnav a b{font:600 12.5px var(--h);color:var(--c);min-width:42px}
.sysnav a span{font-size:14px;line-height:1.35;color:var(--mute)}
.sysnav a:hover{border-color:var(--c);color:inherit}.sysnav a:hover span{color:var(--text)}
.sysnav a[aria-current]{border-color:var(--c);background:color-mix(in srgb,var(--c) 10%,transparent)}
.sysnav a[aria-current] span{color:var(--text)}
/* FAQ */
.faq details:first-child{padding-top:0}
.faq details{max-width:none}
/* about, contacts */
.two.wide-l{grid-template-columns:1.35fr 1fr}
.side h2{font-size:18px;margin:8px 0 10px}
.side p{color:var(--mute);margin:0;font-size:15.5px}
.bigtel{display:inline-block;font:600 clamp(28px,3.6vw,44px)/1.1 var(--h);text-decoration:none;margin:10px 0 26px;letter-spacing:-.01em}
.cdl{margin:0;display:grid;gap:0}
.cdl div{padding:14px 0;border-bottom:1px solid var(--line)}
.cdl div:first-child{padding-top:0}.cdl div:last-child{border-bottom:0;padding-bottom:0}
.cdl dt{font-size:13px;color:var(--mute)}.cdl dd{margin:2px 0 0}
@media (max-width:900px){.two.wide-l{grid-template-columns:1fr}}
/* prices */
.psw{display:inline-block;width:10px;height:10px;border-radius:3px;background:var(--c);box-shadow:0 0 10px var(--c);margin-right:12px}
@media (prefers-reduced-motion:reduce){.stamp .st-mark,.sysnav a{transition:none}}
/* polish, round 2 */
@media (min-width:981px){.ws-grid,.svc-top{grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr)}}
.hero-copy h1{font-size:clamp(30px,3.5vw,47px);max-width:17ch}
.facts b{font-size:clamp(19px,1.9vw,26px);white-space:nowrap}
.spec{grid-template-columns:repeat(2,auto)}
.spec div:nth-child(3){border-left:0}.spec div:nth-child(n+3){border-top:1px solid var(--glass-b)}
.spec dd{white-space:nowrap}
.hero.svc{padding-bottom:clamp(20px,3vw,40px)}
.hero.svc+.svc{padding-top:clamp(24px,3vw,48px)}
@media (max-width:420px){.spec{grid-template-columns:1fr 1fr}.spec dd{white-space:normal}}
.stamp .st-name b{font:700 13px/1.35 var(--f)}
.stamp>div{padding-left:10px;padding-right:10px}
@media (max-width:1500px){.stamp .st-org{display:none}.stamp{grid-template-columns:minmax(0,1fr) repeat(5,auto)}.stamp .st-name{border-left:0}}
@media (min-width:981px){.chips{gap:5px}.chip{padding:7px 9px}}

/* ---- sales pass 10.11 ---- */
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.top .hcta{min-height:42px;padding:0 20px;font-size:14.5px}
@media (max-width:1140px){.top .hcta{display:none}}
.hero-copy h1{font-size:clamp(32px,3.9vw,54px);max-width:16ch}
.hero-copy .lead{max-width:46ch}
.qform{grid-template-columns:minmax(0,1fr) auto;gap:10px;margin-top:28px;max-width:540px}
.qform .qf-tel{gap:0}
.qform input[type=tel]{height:56px;font-size:17px;border-color:rgba(160,190,230,.34);background:rgba(8,17,29,.75)}
.qform .btn{min-height:56px;white-space:nowrap;padding:0 26px}
.qform .consent,.qform .msg{grid-column:1/-1}
.qform .consent{font-size:13px;align-items:center}
.qform .consent input{width:18px;height:18px;margin:0}
.qform .msg{min-height:0}.qform .msg:empty{display:none}
.qf-note{font-size:14px;color:var(--mute);margin:10px 0 0}
@media (max-width:520px){.qform{grid-template-columns:1fr}}
.lact{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px}
.lcalc{display:inline-flex;align-items:center;min-height:38px;padding:0 16px;border-radius:999px;font:600 13px var(--h);text-decoration:none;
  color:var(--text);border:1px solid color-mix(in srgb,var(--c) 60%,transparent);background:color-mix(in srgb,var(--c) 12%,transparent);transition:background .2s}
.lcalc:hover{background:color-mix(in srgb,var(--c) 28%,transparent);color:var(--text)}
.mcta{width:100%;margin-top:10px;min-height:48px;font-size:15px}
@media (max-width:980px){.mcta{display:none}}
.band{padding:clamp(20px,3vw,40px) 0}
.band-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px 40px;padding:clamp(24px,3.4vw,44px);border-radius:24px;border:1px solid var(--glass-b);
  background:radial-gradient(520px 240px at 100% 0%,rgba(255,75,62,.16),transparent 70%),radial-gradient(420px 240px at 0% 100%,rgba(63,208,255,.12),transparent 70%),var(--deep)}
.band-in h2{font-size:clamp(21px,2.3vw,30px);max-width:24ch;margin-bottom:.4em}
.band-in p{margin:0;color:var(--mute)}
.band-in .actions{margin-top:0}
.rq-next{list-style:none;counter-reset:n;display:flex;flex-wrap:wrap;gap:8px 26px;padding:0;margin:14px 0 0;font-size:14.5px;color:var(--mute)}
.rq-next li{counter-increment:n;display:flex;gap:8px;align-items:baseline}
.rq-next li::before{content:counter(n);font:600 12px var(--h);color:var(--air);border:1px solid rgba(63,208,255,.45);border-radius:50%;width:22px;height:22px;display:inline-grid;place-items:center;flex:none}
.rq-next b{color:var(--text)}
@media (max-width:560px){.prices th:nth-child(2),.prices td:nth-child(2){display:none}.prices th,.prices td{padding:13px 8px}.prices td:first-child{overflow-wrap:anywhere}.psw{margin-right:8px}}
@media (prefers-reduced-motion:reduce){.lcalc{transition:none}}
.mcta{background:color-mix(in srgb,var(--c,var(--air)) 14%,transparent);border:1px solid color-mix(in srgb,var(--c,var(--air)) 70%,transparent);color:var(--text);box-shadow:none}
.mcta:hover{background:color-mix(in srgb,var(--c,var(--air)) 28%,transparent);color:var(--text)}
/* 10.11: no scroll caption, no empty gap under the first block */
.hero-copy{min-height:0;padding-bottom:clamp(28px,4vh,48px)}

/* ---- skills pass 10.11 (ui-design-review, nickture, vectorlab) ---- */
:root{--m1:100ms;--m2:150ms;--m3:200ms;--m4:300ms;--e-out:cubic-bezier(.16,1,.3,1);--e-in:cubic-bezier(.7,0,.84,0)}
/* forms: visible labels, error at its field, dark consent box */
.qform{align-items:end}
.qform .qf-tel{gap:6px}
.qf-l{font-size:14px;color:var(--mute)}
.opt{color:var(--mute);font-weight:400;font-style:normal}
.fe{display:block;color:#FF8A80;font-size:13.5px;line-height:1.35;font-weight:600}
.fe:empty{display:none}
.form input[aria-invalid="true"]{border-color:#FF8A80;box-shadow:0 0 0 3px rgba(255,138,128,.18)}
.form .consent{flex-wrap:wrap;align-items:center;gap:8px 12px;min-height:44px;cursor:pointer}
.form .consent span{flex:1;min-width:0}
.form .consent .fe{flex-basis:100%}
.form .consent input,.qform .consent input{appearance:none;-webkit-appearance:none;width:24px;height:24px;margin:0;flex:none;border:1.5px solid rgba(160,190,230,.55);border-radius:6px;background:rgba(8,17,29,.75);display:grid;place-content:center;cursor:pointer;box-shadow:none}
.form .consent input:checked{background:var(--air);border-color:var(--air)}
.form .consent input:checked::after{content:"";width:6px;height:11px;border:solid #08111D;border-width:0 2.5px 2.5px 0;transform:rotate(45deg) translate(-1px,-1px)}
.form .consent input:focus-visible{outline:2px solid var(--air);outline-offset:3px}
.form .consent input[aria-invalid="true"]{border-color:#FF8A80;box-shadow:0 0 0 3px rgba(255,138,128,.18)}
.msg a{color:inherit}
.ok-tick{vertical-align:-5px;margin-right:8px;fill:none;stroke:#5BE39A;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.ok-tick path{stroke-dasharray:1;stroke-dashoffset:1;animation:tick var(--m4) var(--e-out) .1s forwards}
@keyframes tick{to{stroke-dashoffset:0}}
/* phone: smaller pinned model, form right after the heading, call bar hides near a form */
@media (max-width:980px){
  .ws-model .model-frame .bim{max-height:17vh}
  .ws-model .model-frame{padding:4px 10px 6px}
}
@media (max-width:640px){
  .hero-copy .lead{order:1;margin-top:22px}
  .hero-copy .facts{order:2}
  .hero-copy .qform{margin-top:18px}
  .callbar a{font-size:15px}
}
/* touch targets */
@media (pointer:coarse){
  .lcalc{min-height:44px}
  .lmore{display:inline-flex;align-items:center;min-height:44px}
  .chip{min-height:44px;padding:0 14px}
  .crumbs a{display:inline-block;padding:10px 0}
}
/* all systems are equal: no red accent on the last step */
.steps::before{background:linear-gradient(90deg,var(--air),color-mix(in srgb,var(--air) 20%,transparent))}
.steps li:last-child::before{border-color:var(--air);box-shadow:0 0 18px rgba(63,208,255,.35)}
/* FAQ rows, current menu item, prices on phone, small type */
details{padding:10px 0}
details summary{min-height:44px;align-items:center;transition:color var(--m2) var(--e-out)}
details summary:hover{color:var(--air)}
@media (min-width:981px){.nav a[aria-current]{box-shadow:inset 0 -2px 0 var(--air)}.stamp small{font-size:11px}}
.pt{display:none;color:var(--mute);font-size:13px;font-weight:400;margin-top:3px}
@media (max-width:560px){.pt{display:block}}
@media (max-width:520px){.facts span{font-size:13px;line-height:1.35}}
/* motion: title block text swap, layer rail on phone, one-time reveal, CAD corner marks */
.stamp b[data-st-mark],.stamp b[data-st-sheet],.stamp b[data-hud-layer]{transition:opacity var(--m1) var(--e-in),transform var(--m1) var(--e-in)}
.stamp b.sw-out{opacity:0;transform:translateY(-4px)}
.rail{display:none}
@media (max-width:980px){
  .rail{display:grid;grid-template-columns:repeat(10,1fr);gap:3px;margin:5px 0 0}
  .rail i{height:3px;border-radius:2px;background:rgba(160,190,230,.22);transition:background var(--m3) var(--e-out),transform var(--m3) var(--e-out)}
  .rail i.on{background:var(--c,var(--air));transform:scaleY(1.8)}
}
.js-rv .rv{opacity:0;transform:translateY(10px);transition:opacity var(--m4) var(--e-out),transform var(--m4) var(--e-out);transition-delay:calc(var(--i,0)*40ms)}
.js-rv .rv.in{opacity:1;transform:none}
.card::before{content:"";position:absolute;inset:8px;pointer-events:none;opacity:0;transform:scale(1.03);
  --k:var(--c,var(--air));
  background:
   linear-gradient(var(--k),var(--k)) top left/12px 1px,linear-gradient(var(--k),var(--k)) top left/1px 12px,
   linear-gradient(var(--k),var(--k)) top right/12px 1px,linear-gradient(var(--k),var(--k)) top right/1px 12px,
   linear-gradient(var(--k),var(--k)) bottom left/12px 1px,linear-gradient(var(--k),var(--k)) bottom left/1px 12px,
   linear-gradient(var(--k),var(--k)) bottom right/12px 1px,linear-gradient(var(--k),var(--k)) bottom right/1px 12px;
  background-repeat:no-repeat;transition:opacity var(--m2) var(--e-out),transform var(--m2) var(--e-out)}
.card:hover::before,.card:focus-visible::before{opacity:.9;transform:none}
.bim.is-paused *,.tab-hidden .bim *{animation-play-state:paused!important}
@media (hover:none){.card:hover{transform:none}.card:hover::before{opacity:0}}
@media (prefers-reduced-motion:reduce){
  .card:hover,.btn:hover{transform:none}
  .card,.btn,.lcalc,.chip,.callbar,.rail i,.card::before,.stamp b,details summary{transition:none}
  .card::before{transform:none}
  .ok-tick path{animation:none;stroke-dashoffset:0}
}
/* ---- 11.11: people who do not want to call. Chat and Max stay visible; forms ask how to answer ---- */
@media (max-width:640px){
  .callbar{grid-template-columns:1fr 1fr 1fr;gap:6px}
  .callbar a,.callbar .cb-chat{display:flex;align-items:center;justify-content:center;min-height:52px;border-radius:999px;font:700 15px var(--b,inherit);font-family:inherit;color:var(--text);text-decoration:none;background:rgba(12,26,43,.94);border:1px solid var(--glass-b);cursor:pointer;padding:0 6px}
  .callbar a:first-child{background:rgba(12,26,43,.94)}
  .callbar .cb-chat{border-color:var(--air);box-shadow:inset 0 0 0 1px var(--air)}
}
.how{border:0;margin:0;padding:0;min-width:0;display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px}
.qform .how{grid-column:1/-1}
.how legend{float:left;padding:0;margin:0 4px 0 0;font-size:14px;color:var(--mute);line-height:40px}
.form .how label{flex-direction:row;gap:0;cursor:pointer;color:var(--text)}
.how input{position:absolute;opacity:0;width:1px;height:1px}
.how span{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border-radius:999px;border:1px solid rgba(160,190,230,.34);font-size:14px;font-weight:600;color:var(--mute);transition:border-color var(--m2) var(--e-out),color var(--m2) var(--e-out),background var(--m2) var(--e-out)}
.how input:checked+span{border-color:var(--air);color:var(--text);background:color-mix(in srgb,var(--air) 14%,transparent)}
.how input:focus-visible+span{outline:2px solid var(--air);outline-offset:2px}
@media (pointer:coarse){.how span{min-height:44px}.how legend{line-height:44px}}
.qf-alt{font-size:14px;color:var(--mute);margin:10px 0 0;max-width:540px}
.qf-alt a,.lk{color:var(--text);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--air) 70%,transparent);text-underline-offset:3px}
.lk{background:none;border:0;padding:0;font:inherit;cursor:pointer}
.lk:hover,.qf-alt a:hover{color:var(--air)}
@media (prefers-reduced-motion:reduce){.how span{transition:none}}