/* Концепция: разрез здания тонкой линией на глубоком графите, жёлтый цвет логотипа как единственный акцент, много воздуха. */
:root{
  --ink:#0B1217; --ink2:#111B21; --ink3:#18252C; --paper:#F2F4F3; --white:#FFFFFF;
  --fg:#EEF2F1; --mist:#9EAEB4; --line:#26363E; --line-l:#D7DDDB; --text:#0F1B22; --text2:#52626A;
  --brass:#FFE600; --brass2:#FFF27A; --err:#F2A49C; --ok:#8FD6B0;
  --display:"Geologica","Golos Text",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --body:"Golos Text",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--ink);color:var(--fg);font:400 17px/1.65 var(--body);-webkit-text-size-adjust:100%}
h1,h2,h3,p,ul,ol,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px}
[hidden]{display:none!important}
.wrap{max-width:1240px;margin-inline:auto;padding-left:max(24px,env(safe-area-inset-left,0px));padding-right:max(24px,env(safe-area-inset-right,0px))}
.eyebrow{font:500 12px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--brass)}

/* Шапка */
.top{position:sticky;top:0;z-index:20;background:rgba(11,18,23,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;min-width:0}
.brand img{width:34px;height:34px;flex:none}
.brand span{font:300 21px/1 var(--display);letter-spacing:.01em;white-space:nowrap}
.brand b{font-weight:500}
.nav{display:flex;align-items:center;gap:30px;font-size:15px}
.nav a:not(.btn){text-decoration:none;color:var(--mist);transition:color .2s}
.nav a:not(.btn):hover,.nav a[aria-current]{color:var(--fg)}

/* Кнопки */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:12px 28px;border:1px solid var(--brass);background:var(--brass);color:#14202A;font-weight:500;font-size:16px;text-decoration:none;cursor:pointer;transition:background .25s,border-color .25s,color .25s}
.btn:hover{background:var(--brass2);border-color:var(--brass2)}
.btn.line{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.line:hover{border-color:var(--brass);color:var(--brass2);background:transparent}
.btn.sm{min-height:42px;padding:8px 18px;font-size:15px}
.btn.onlight{background:var(--text);border-color:var(--text);color:#fff}
.btn.onlight:hover{background:#22323B;border-color:#22323B}
.btn[disabled]{opacity:.6;cursor:default}
.row{display:flex;flex-wrap:wrap;gap:12px}

/* Первый экран */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(60% 70% at 78% 40%,#1B2C34 0%,rgba(11,18,23,0) 70%)}
.hero .wrap{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:48px;align-items:center;padding-block:clamp(56px,8vw,110px)}
.hero h1{font:200 clamp(44px,6.2vw,84px)/1.06 var(--display);letter-spacing:-.022em;margin-block:26px 28px;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--brass2)}
.hero .lead{font-size:clamp(18px,1.5vw,20px);line-height:1.6;color:var(--mist);max-width:31em}
.hero .row{margin-top:40px}
.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:56px;padding-top:28px;border-top:1px solid var(--line)}
.facts b{display:block;font:200 clamp(32px,3.2vw,44px)/1.1 var(--display);color:var(--fg)}
.facts span{font-size:14px;color:var(--mist);line-height:1.4;display:block;margin-top:6px}

/* Разрез здания */
.bld{width:100%;height:auto;display:block}
.bld text{font-family:var(--mono);font-size:12px;fill:var(--mist);letter-spacing:.04em}
.bld .shell{stroke:#526873;stroke-width:1;fill:none}
.bld .soft{stroke:#3A4E58;stroke-width:1;fill:none}
.bld .s{stroke:#6C8491;stroke-width:1.2;fill:none;transition:stroke .5s,stroke-width .5s,opacity .5s;stroke-linecap:round;stroke-linejoin:round}
.bld[data-on] .s{opacity:.55}
.bld[data-on="power"] .s-power,.bld[data-on="heat"] .s-heat,.bld[data-on="vent"] .s-vent,.bld[data-on="water"] .s-water,.bld[data-on="video"] .s-video,.bld[data-on="skud"] .s-skud{stroke:var(--brass2);stroke-width:1.8;opacity:1}
.cap{display:flex;justify-content:space-between;gap:16px;margin-top:14px;font:500 13px/1.4 var(--mono);color:var(--mist);letter-spacing:.04em}
.cap b{color:var(--brass2);font-weight:500}

/* Секции */
.sec{padding-block:clamp(72px,10vw,136px)}
.sec h2{font:200 clamp(34px,4.4vw,60px)/1.12 var(--display);letter-spacing:-.016em;text-wrap:balance;max-width:17em}
.sec .intro{margin-top:20px;max-width:37em;font-size:clamp(17px,1.4vw,19px);color:var(--mist)}
.light{background:var(--paper);color:var(--text);color-scheme:light}
.light .intro{color:var(--text2)}
.light .eyebrow{color:#8A6C36}

.values{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:64px;border-top:1px solid var(--line-l)}
.values li{padding:32px 36px 8px 0}
.values li+li{padding-left:36px;border-left:1px solid var(--line-l)}
.values h3{font:300 clamp(22px,2vw,28px)/1.25 var(--display);margin-bottom:12px}
.values p{color:var(--text2)}

.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(40px,6vw,88px);align-items:center;margin-top:56px}
.syslist button{display:grid;grid-template-columns:44px minmax(0,1fr);gap:4px 12px;width:100%;padding:20px 0;text-align:left;background:none;border:0;border-top:1px solid var(--line);cursor:pointer;color:var(--fg)}
.syslist li:last-child button{border-bottom:1px solid var(--line)}
.syslist .n{font:500 12px/2 var(--mono);color:var(--mist)}
.syslist b{font:300 clamp(21px,2vw,26px)/1.3 var(--display);transition:color .25s}
.syslist span.d{grid-column:2;font-size:15px;color:var(--mist);line-height:1.5}
.syslist button[aria-pressed="true"] b,.syslist button:hover b{color:var(--brass2)}
.syslist button[aria-pressed="true"] .n{color:var(--brass2)}

.works{margin-top:56px;border-top:1px solid var(--text)}
.works li{display:grid;grid-template-columns:72px minmax(0,1fr) minmax(0,1.1fr);gap:12px 32px;align-items:baseline;padding-block:clamp(22px,3vw,34px);border-bottom:1px solid var(--line-l)}
.works .n{font:500 13px var(--mono);color:#8A6C36}
.works h3{font:200 clamp(26px,3.2vw,44px)/1.15 var(--display)}
.works p{color:var(--text2)}

.cab{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(40px,6vw,88px);align-items:center}
.check{margin-top:30px;display:grid;gap:14px}
.check li{padding-left:26px;position:relative;color:var(--fg)}
.check li::before{content:"";position:absolute;left:0;top:.8em;width:14px;height:1px;background:var(--brass)}
.mock{border:1px solid var(--line);background:var(--ink2);box-shadow:0 40px 80px -40px #000}
.mock header{display:flex;justify-content:space-between;gap:12px;padding:16px 22px;border-bottom:1px solid var(--line);font-size:14px;color:var(--mist)}
.mock .m-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 14px;padding:16px 22px;border-bottom:1px solid var(--line);font-size:15px}
.mock .m-row small{color:var(--mist);font-size:13px}
.mock .st{font:500 12px var(--mono);color:var(--brass2);white-space:nowrap;align-self:center;grid-row:span 2}
.mock .st.done{color:var(--ok)}
.mock footer{display:flex;justify-content:space-between;gap:12px;padding:16px 22px;font-size:14px;color:var(--mist)}
.mock footer b{color:var(--fg);font-weight:500}
.note{margin-top:12px;font-size:13px;color:var(--mist)}

.owner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:end;padding-block:clamp(64px,8vw,104px);border-block:1px solid var(--line)}
.owner .nm{font:200 clamp(32px,4.2vw,56px)/1.12 var(--display);margin-top:16px}
.owner>p:last-child{color:var(--mist);font-size:clamp(17px,1.4vw,19px)}

.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px;margin-top:56px}
.steps li{border-top:1px solid var(--text);padding-top:18px}
.steps .n{font:500 13px var(--mono);color:#8A6C36}
.steps b{display:block;font:300 22px/1.3 var(--display);margin-block:12px 8px}
.steps p{color:var(--text2);font-size:15.5px}

/* Форма */
.cta{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(40px,6vw,96px)}
.cta dl{margin-top:44px;display:grid;gap:22px}
.cta dt{font:500 12px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--mist);margin-bottom:4px}
.cta dd{font-size:19px;overflow-wrap:anywhere}
.cta dd.sm{font-size:16px;color:var(--mist)}
.cta dd a{margin-right:16px}
.form{display:grid;gap:18px}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.f{display:grid;gap:6px;min-width:0}
.f>span{font-size:14px;color:var(--mist)}
.f input,.f select,.f textarea{width:100%;min-height:54px;padding:13px 16px;background:var(--ink2);border:1px solid var(--line);border-radius:0;transition:border-color .2s}
.f textarea{min-height:130px;resize:vertical}
.f input:focus,.f select:focus,.f textarea:focus{border-color:var(--brass);outline:none}
.agree{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--mist)}
.agree input{width:20px;height:20px;margin:2px 0 0;flex:none;accent-color:var(--brass)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.ok{padding:16px 18px;border:1px solid var(--ok);color:var(--ok)}
.err{color:var(--err);font-size:15px}
.foot{border-top:1px solid var(--line);padding-block:36px;font-size:14px;color:var(--mist)}
.foot .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 32px}

.flinks{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:flex-start}
.doc{display:grid;gap:18px;max-width:900px}
.doc h2{font:300 clamp(26px,3vw,36px)/1.2 var(--display);margin-top:32px}
.doc h2:first-child{margin-top:0}
.doc p{color:var(--text2)}
.docl{display:grid;gap:12px;color:var(--text2)}
.docl b{color:var(--text);font-weight:500}
.doc .steps{margin-top:8px}
.paylogos{display:block;width:100%;max-width:760px;height:auto}
.footlogos{margin-top:28px}
.logoband{background:var(--ink);padding:24px 28px;margin-top:8px}
.logoband .paylogos{max-width:100%}

/* Каталог */
.chead{padding-block:clamp(56px,7vw,96px) clamp(36px,4vw,52px);border-bottom:1px solid var(--line)}
.chead h1{font:200 clamp(40px,5.4vw,72px)/1.08 var(--display);letter-spacing:-.02em;margin-top:18px}
.chead p:last-child{margin-top:18px;max-width:36em;color:var(--mist);font-size:clamp(17px,1.4vw,19px)}
.filters{position:sticky;top:75px;z-index:10;background:rgba(11,18,23,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.filters .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;padding-block:14px}
.chips{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;max-width:100%}
.chip{flex:none;min-height:38px;padding:6px 14px;border:1px solid var(--line);background:none;color:var(--mist);font-size:14px;cursor:pointer;white-space:nowrap}
.chip:hover{color:var(--fg)}
.chip[aria-pressed="true"]{background:var(--fg);border-color:var(--fg);color:var(--ink)}
.bundle{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px 40px;align-items:center;margin-block:40px 8px;padding:clamp(24px,3vw,36px);border:1px solid var(--brass)}
.bundle h2{font:300 clamp(24px,2.6vw,32px)/1.2 var(--display);margin-top:8px}
.bundle p.d{color:var(--mist);margin-top:8px;max-width:40em}
.group{padding-block:44px;border-bottom:1px solid var(--line);scroll-margin-top:150px}
.group>header{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:8px 32px;align-items:baseline;margin-bottom:22px}
.group h2{font:200 clamp(28px,3.2vw,40px)/1.15 var(--display)}
.group header p{color:var(--mist)}
.item{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.2fr) 130px auto;gap:6px 24px;align-items:center;padding-block:16px;border-top:1px solid var(--line)}
.item b{font-weight:500}
.item p{color:var(--mist);font-size:15px;line-height:1.5}
.item .w{font:500 12px var(--mono);color:var(--brass);letter-spacing:.03em}
.add{min-height:42px;min-width:128px;padding:8px 14px;background:none;border:1px solid var(--line);cursor:pointer;font-size:14px;color:var(--fg)}
.add:hover{border-color:var(--brass)}
.add[aria-pressed="true"]{background:var(--brass);border-color:var(--brass);color:#14202A}
.cart{position:sticky;bottom:0;z-index:12;background:var(--ink3);border-top:1px solid var(--brass)}
.cart .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 20px;padding-block:12px}
.picked{margin-bottom:6px;display:grid;gap:6px;font-size:15px;color:var(--brass2)}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.bld .s,.btn{transition:none}}
@media (max-width:1040px){
  .hero .wrap,.split,.cab,.cta,.owner{grid-template-columns:minmax(0,1fr)}
  .nav .opt{display:none}
  .values{grid-template-columns:minmax(0,1fr)}
  .values li,.values li+li{padding:26px 0;border-left:0;border-bottom:1px solid var(--line-l)}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .item{grid-template-columns:minmax(0,1fr) auto}
  .item p{grid-column:1;grid-row:2}
  .item .w{grid-column:1;grid-row:3}
  .item .add{grid-column:2;grid-row:1/4}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding-left:max(18px,env(safe-area-inset-left,0px));padding-right:max(18px,env(safe-area-inset-right,0px))}
  .bar{min-height:64px;gap:12px}
  .brand img{width:30px;height:30px}
  .brand span{font-size:18px}
  .nav{gap:0}
  .nav .btn{padding:6px 12px;font-size:14px;min-height:38px}
  .btn{width:100%}
  .nav .btn{width:auto}
  .facts{gap:14px}
  .facts span{font-size:12.5px}
  .works li{grid-template-columns:minmax(0,1fr);gap:6px}
  .steps{grid-template-columns:minmax(0,1fr);gap:24px}
  .grid2{grid-template-columns:minmax(0,1fr)}
  .group>header{grid-template-columns:minmax(0,1fr)}
  .bundle{grid-template-columns:minmax(0,1fr)}
  .filters{position:static}
  .add{min-width:104px}
}