@font-face{font-family:Inter;src:url(assets/sans-cyrillic.woff2) format('woff2');font-weight:100 900;font-display:swap;unicode-range:U+0400-045F,U+0490-0491,U+2116}
@font-face{font-family:Inter;src:url(assets/sans-latin.woff2) format('woff2');font-weight:100 900;font-display:swap;unicode-range:U+0000-00FF,U+2000-206F}
:root{--paper:#f2f4f6;--ink:#18212b;--muted:#5a6672;--line:#d5dce3;--blue:#2355ce;--dark:#14191f;--ease-out:cubic-bezier(.23,1,.32,1);--ease-in-out:cubic-bezier(.77,0,.175,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{margin:0;color:var(--ink);background:var(--paper);font:14px/1.5 Inter,Arial,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent;outline-offset:4px}button{cursor:pointer;border:0}button:disabled{cursor:default;opacity:.5}a,button{touch-action:manipulation}button:focus-visible,a:focus-visible{outline:3px solid #87aaff}input,select,textarea{border:1px solid var(--line);background:white;color:var(--ink);border-radius:0;padding:12px;max-width:100%}h1,h2,h3,p{margin:0}h1{font-size:clamp(36px,4vw,56px);font-weight:550;line-height:1.08;letter-spacing:-.045em}h2{font-size:36px;line-height:1.15;font-weight:550;letter-spacing:-.035em}h3{font-size:18px;line-height:1.3;font-weight:550;letter-spacing:-.025em}img{display:block;max-width:100%}[hidden]{display:none!important}header{height:86px;display:flex;align-items:center;gap:32px;padding:0 4.45vw;background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;gap:13px;align-items:center;font-size:14px;letter-spacing:.06em;font-weight:700;white-space:nowrap}.brand i{display:grid;place-items:center;width:40px;height:40px;background:var(--blue);color:#fff;font-style:normal;letter-spacing:-.08em}.brand small{display:block;font-size:8px;color:var(--muted);letter-spacing:.1em;font-weight:500;margin-top:3px}header nav{display:flex;gap:28px;margin-left:auto;font-size:13px}.header-phone{font-size:13px;font-weight:600;white-space:nowrap}.selection-open{background:var(--paper);padding:10px 12px;min-height:44px;font-size:12px}.selection-open span{display:inline-grid;place-items:center;min-width:23px;height:23px;background:#fff;color:var(--blue);margin-left:5px}.wrap{max-width:1600px;margin:auto;padding:44px 4.45vw}.eyebrow,.kind{font:11px/1.5 Consolas,'Courier New',monospace;letter-spacing:.08em;text-transform:uppercase}.eyebrow{color:var(--blue);margin-bottom:15px}.kind{font-size:10px;color:var(--muted);margin-bottom:8px}.sub{font-size:15px;line-height:1.75;color:var(--muted);max-width:540px}.muted{color:var(--muted)}.small{font-size:12px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 23px;background:var(--blue);color:#fff;font-size:13px;font-weight:500;text-align:center}.button.ghost{background:transparent;border:1px solid #bcc7d1;color:var(--ink)}.text-link{color:var(--blue);font-size:13px;border-bottom:1px solid #b0c0e5;padding:10px 0}.skip{position:fixed;top:8px;left:8px;z-index:200;transform:translateY(-200%);background:white;padding:14px}.skip:focus{transform:none}.home-title{display:grid;grid-template-columns:1.2fr 1fr;gap:70px;align-items:end;margin:6px 0 38px}.home-title .sub{padding-bottom:4px}.family-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.family{background:#fff;border:1px solid var(--line);min-width:0;transition:box-shadow 200ms var(--ease-out),transform 200ms var(--ease-out)}.family-top{height:230px;position:relative;overflow:hidden;background:#e8ecf0}.family-top img{width:100%;height:100%;object-fit:contain}.number{position:absolute;top:14px;left:14px;background:#fffffff0;padding:5px 9px;font:11px Consolas,monospace}.family-content{padding:22px}.family h2{font-size:25px;letter-spacing:-.03em}.family p{color:var(--muted);font-size:13px;line-height:1.65;max-width:350px;min-height:44px;margin-top:12px}.family-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;margin-top:20px;font-size:12px}.family-bottom b{font-weight:500;color:var(--blue)}.home-bottom{display:flex;justify-content:space-between;gap:24px;align-items:center;border-top:1px solid var(--line);margin-top:36px;padding-top:28px}.home-bottom strong{font-size:16px;font-weight:550}.home-bottom p{margin-top:6px;color:var(--muted);font-size:13px}.catalog-heading{display:flex;align-items:end;justify-content:space-between;gap:35px;margin-bottom:25px}.catalog-heading h1{font-size:43px}.catalog-heading .sub{margin-top:15px}.search{display:block;min-width:270px;font-size:11px;color:var(--muted)}.search span{display:block;margin-bottom:7px}.search input{width:100%;min-height:48px}.tabs{display:flex;gap:8px;overflow-x:auto;scrollbar-width:thin;padding-bottom:12px;margin:0 0 12px}.tabs a{display:flex;align-items:center;justify-content:center;min-height:45px;padding:10px 15px;white-space:nowrap;background:#fff;border:1px solid var(--line);font-size:12px}.tabs a.active{background:var(--ink);color:#fff;border-color:var(--ink)}.catalog-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);margin-bottom:22px;gap:12px}.catalog-meta select{font-size:12px;background:transparent;padding:10px;margin-left:10px}.product-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.product-card{display:flex;flex-direction:column;min-width:0;background:white;border:1px solid var(--line)}.card-link{display:flex;flex-direction:column;flex:1}.product-photo{position:relative;height:215px;background:#e8ecf0;border-bottom:1px solid var(--line)}.product-photo img{width:100%;height:100%;object-fit:contain}.photo-label{position:absolute;left:10px;bottom:10px;background:#fffffff0;padding:4px 7px;font:9px Consolas,monospace;color:#515b65;letter-spacing:.04em}.card-copy{padding:17px 17px 12px;display:flex;flex-direction:column;flex:1}.card-copy h3{font-size:17px;min-height:44px}.card-copy .kind{font-size:9px;min-height:27px}.card-spec{display:flex;justify-content:space-between;gap:12px;font-size:11px;border-top:1px solid #e5e9ed;border-bottom:1px solid #e5e9ed;padding:11px 0;margin:12px 0;color:var(--muted)}.card-spec b{font-weight:500;color:var(--ink);text-align:right}.card-detail{font-size:11px;color:var(--blue);margin-top:auto;line-height:1.6}.save{background:#f1f4f8;border-top:1px solid #e1e7ed;color:var(--blue);padding:12px 16px;min-height:44px;font-size:12px;text-align:left}.save[aria-pressed=true],.button[aria-pressed=true]{background:#e4ebfa;color:#244b9a}.load-more{display:flex;margin:30px auto 0;min-width:220px}#empty{padding:50px 0;text-align:center;color:var(--muted)}.product-nav{position:sticky;top:0;z-index:20;display:flex;gap:28px;align-items:center;min-height:58px;padding:10px 4.45vw;border-bottom:1px solid var(--line);background:#ffffffed;backdrop-filter:blur(14px);font-size:12px}.product-nav>span{margin-right:auto;font-weight:600;font-size:13px;max-width:50%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.product-nav a{padding:9px 0;color:var(--muted)}.breadcrumb{display:flex;gap:14px;color:var(--muted);font-size:12px;margin-bottom:25px;flex-wrap:wrap}.breadcrumb span{color:#b4bec7}.product-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:60px}.specimen{display:block;position:relative;height:560px;background:#e6e9ec;border:1px solid var(--line);overflow:hidden}.specimen>img{width:100%;height:100%;object-fit:contain}.corner-label,.specimen-caption{position:absolute;background:#fffffff0;padding:10px 12px;font:10px Consolas,monospace;color:#445260}.corner-label{left:18px;top:18px}.specimen-caption{left:18px;bottom:18px}.spec-detail{padding-top:10px}.spec-detail h1{font-size:clamp(30px,3.1vw,46px);margin-bottom:22px}.spec-detail .sub{font-size:14px}.specs{margin:28px 0}.specs>div{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-top:1px solid var(--line);font-size:13px}.specs dt{color:var(--muted)}.specs dd{margin:0;text-align:right;font-weight:500;max-width:65%}.spec-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}.technical-note{border-left:2px solid var(--blue);padding-left:14px;font-size:12px;color:var(--muted);margin-top:28px;max-width:440px;line-height:1.7}.technical-note strong{display:block;color:var(--ink);font-weight:550;margin-bottom:4px}.photo-switch{display:flex;gap:10px;margin-top:12px}.photo-switch button{width:72px;height:72px;background:#fff;padding:4px;border:1px solid var(--line)}.photo-switch img{width:100%;height:100%;object-fit:contain}.photo-switch button[aria-pressed=true]{border:2px solid var(--blue)}
.construction{background:var(--dark);color:#f1f4f7;margin-top:15px}.story-heading{padding:48px 4.45vw 0}.story-heading .eyebrow{color:#94b1ff}.story-heading h2{font-size:37px}.story-heading p{color:#9daab9;font-size:13px;margin-top:12px}.story-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(0,1fr);gap:3vw;padding:0 4.45vw 0 2vw;align-items:start}.stage-sticky{position:sticky;top:74px;padding-top:16px;margin-top:24px;min-width:0}.stage{height:min(62vh,590px);min-height:340px;position:relative;background:radial-gradient(ellipse at 50% 55%,#354452 0,#1d2731 45%,#14191f 74%);overflow:hidden;border:1px solid #313e4c}.stage canvas{display:block;width:100%;height:100%;position:absolute;inset:0;touch-action:pan-y}.stage-fallback{width:100%;height:100%;object-fit:contain;opacity:.65}.stage.ready .stage-fallback{visibility:hidden}.stage-top{position:absolute;top:21px;left:22px;right:22px;display:flex;justify-content:space-between;gap:15px;font:10px/1.5 Consolas,monospace;color:#bccbdc;z-index:2;pointer-events:none}.stage-top b{color:#fff;font-weight:500}.stage-loading{position:absolute;top:48%;left:0;right:0;text-align:center;background:#14191fe0;padding:12px;font-size:12px}.stage.ready .stage-loading{display:none}.stage.failed .stage-loading{top:auto;bottom:65px}.stage-tools{position:absolute;bottom:16px;left:16px;right:16px;display:flex;gap:6px;justify-content:center;z-index:2}.stage-tools button{min-height:42px;min-width:42px;padding:8px 12px;background:#202c38ed;color:#dae5f1;border:1px solid #526274;font-size:11px}.stage-tools button[aria-pressed=true]{background:#dfe9f6;color:#17283f}.story-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:18px}.story-tabs a{border-top:2px solid #34414f;padding:12px 8px 8px;color:#98a8b9;font-size:11px;min-height:65px;transition:color 180ms var(--ease-out),border-color 180ms var(--ease-out)}.story-tabs b{font:10px Consolas,monospace;display:block;margin-bottom:7px}.story-tabs a[aria-current=step]{color:#fff;border-color:#83a6ff}.scheme-note{font-size:10px;line-height:1.65;color:#9ba9b8;padding:6px 8px 18px;max-width:650px}.chapter{min-height:80vh;display:flex;align-items:center;padding:85px 0;scroll-margin-top:90px}.chapter-inner{max-width:380px}.chapter .eyebrow{color:#94b1ff;font-size:10px}.chapter h2{font-size:38px;line-height:1.15;margin:15px 0 25px}.chapter p{font-size:14px;line-height:1.85;color:#b2bdc8}.chapter dl{margin-top:30px}.chapter dl>div{border-top:1px solid #3a4654;padding-top:14px;display:flex;justify-content:space-between;gap:20px;font-size:11px}.chapter dt{color:#93a4b6}.chapter dd{text-align:right;margin:0;max-width:60%}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:30px}.variants{padding-top:60px;padding-bottom:60px}.calculator{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;border-bottom:1px solid var(--line)}.calculator h2{font-size:30px;margin-bottom:15px}.calculator form{display:grid;grid-template-columns:1fr 1fr;gap:15px;align-items:end}.calculator label{font-size:12px;display:grid;gap:8px}.calculator input{width:100%}.calculator output{grid-column:1/-1;color:var(--blue);font-size:30px;font-weight:550}.calculator output small{display:block;font-size:12px;color:var(--muted);font-weight:400}
footer{background:#e5eaf0;padding:45px 4.45vw 22px;display:grid;grid-template-columns:1fr 1fr;gap:30px}footer h2{font-size:28px}footer p{font-size:13px;color:var(--muted);margin-top:12px}.contact-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;font-size:15px;align-content:start}.contact-list a{min-height:32px;overflow-wrap:anywhere}.footer-bottom{grid-column:1/-1;display:flex;justify-content:space-between;gap:20px;border-top:1px solid #cbd4df;padding-top:20px;font-size:11px;color:var(--muted)}dialog{color:var(--ink);background:var(--paper);border:1px solid var(--line);padding:28px;width:min(680px,calc(100% - 24px));max-height:calc(100dvh - 30px);overflow:auto;overscroll-behavior:contain}dialog::backdrop{background:#0f1826a8;backdrop-filter:blur(4px)}body:has(dialog[open]){overflow:hidden}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}.dialog-head h2{font-size:29px}.dialog-head button{min-height:44px;background:#fff;padding:10px}.selection-row{display:grid;grid-template-columns:62px minmax(0,1fr) auto;align-items:center;gap:14px;border-top:1px solid var(--line);padding:13px 0;font-size:13px}.selection-row img{width:62px;height:62px;object-fit:contain;background:white}.selection-row small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.selection-row button{min-height:44px;background:transparent;color:var(--blue);font-size:12px}.field{display:grid;gap:8px;font-size:12px;margin:20px 0}.field textarea{resize:vertical;min-height:80px}.dialog-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:15px}#selection-items{margin:20px 0;max-height:40dvh;overflow:auto}#selection-items>p{padding:20px 0}.selection-empty-link{color:var(--blue);text-decoration:underline}#status{position:fixed;bottom:25px;left:50%;transform:translate(-50%,15px);opacity:0;pointer-events:none;background:#182c44;color:#fff;box-shadow:0 5px 35px #0c203e26;padding:13px 20px;max-width:calc(100% - 30px);width:max-content;font-size:13px;z-index:100;transition:opacity 180ms var(--ease-out),transform 180ms var(--ease-out)}#status.visible{opacity:1;transform:translate(-50%,0)}
@media(hover:hover) and (pointer:fine){.family:hover{transform:translateY(-3px);box-shadow:0 15px 35px #182c440f}.card-link:hover h3,header nav a:hover,.product-nav a:hover{color:var(--blue)}.button:hover{filter:brightness(1.08)}.story-tabs a:hover{color:#fff}.save:hover{background:#e6edf8}}
@media(min-width:1600px){.story-layout{max-width:1600px;margin:auto}.stage{height:590px}}
@media(max-width:1050px){header{gap:20px}header nav{gap:20px}.header-phone{display:none}.selection-open{margin-left:auto}.home-title{gap:35px}.family-grid{gap:16px}.family h2{font-size:22px}.family-content{padding:18px}.family-top{height:200px}.product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.product-layout{gap:32px}.specimen{height:500px}.story-layout{grid-template-columns:1.3fr 1fr;gap:25px}.chapter h2{font-size:31px}.chapter p{font-size:13px}.contact-list{grid-template-columns:1fr}}
@media(max-width:700px){html{scroll-padding-top:65px}header{height:73px;padding:0 20px;gap:10px}.brand{font-size:11px;gap:9px}.brand i{width:33px;height:33px}.brand small{font-size:8px}header nav{display:none}.selection-open{font-size:13px;padding:6px 8px;white-space:nowrap}.selection-open span{min-width:20px;height:20px;margin-left:3px}.wrap{padding:28px 20px}.home-title{display:block;margin-bottom:25px}.home-title h1{font-size:36px;line-height:1.1}.home-title .sub{margin-top:20px;font-size:13px;line-height:1.7}.eyebrow{font-size:11px}.family-grid{grid-template-columns:1fr;gap:14px}.family{display:grid;grid-template-columns:36% minmax(0,1fr)}.family-top{height:100%;min-height:195px}.family-content{padding:17px 15px}.family h2{font-size:21px}.family .kind{font-size:10px}.family p{font-size:13px;min-height:0;margin-top:10px;line-height:1.6}.family-bottom{font-size:12px;gap:8px;margin-top:14px;padding-top:12px}.number{top:8px;left:8px;font-size:11px}.home-bottom{display:block;margin-top:25px;padding-top:25px}.home-bottom p{font-size:13px}.home-bottom .button{width:100%;margin-top:20px}.catalog-heading{display:block}.catalog-heading h1{font-size:33px;overflow-wrap:break-word}.catalog-heading .sub{font-size:13px;margin-top:14px}.search{margin-top:22px;min-width:0}.search input{font-size:16px}.tabs{margin-right:-20px;padding-right:20px}.tabs a{font-size:13px;min-height:44px;padding:10px 12px}.catalog-meta{font-size:13px;align-items:center}.catalog-meta label{font-size:0}.catalog-meta select{font-size:16px;margin-left:0;max-width:160px}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.product-photo{height:180px}.card-copy{padding:12px 11px}.card-copy .kind{font-size:10px;min-height:25px;letter-spacing:.04em}.card-copy h3{font-size:14px;min-height:38px;line-height:1.4;overflow-wrap:anywhere}.card-spec{display:block;font-size:12px;margin:10px 0}.card-spec b{display:block;text-align:left;margin-top:5px;overflow-wrap:anywhere}.card-detail{font-size:12px}.photo-label{font-size:9px;left:6px;bottom:6px;padding:3px 5px}.save{font-size:13px;padding:10px 12px}.product-nav{gap:26px;padding:6px 20px;min-height:50px;justify-content:space-between;font-size:13px}.product-nav>span{display:none}.breadcrumb{font-size:12px;gap:10px;margin-bottom:20px}.product-layout{grid-template-columns:1fr;gap:24px}.specimen{height:340px}.spec-detail{padding-top:0}.spec-detail h1{font-size:34px;margin-bottom:17px}.spec-detail .sub{font-size:13px}.corner-label,.specimen-caption{font-size:10px;padding:8px;left:10px}.corner-label{top:10px}.specimen-caption{bottom:10px}.specs{margin:23px 0}.specs>div{font-size:13px;gap:15px}.spec-actions{display:grid;grid-template-columns:1fr;margin-top:20px}.technical-note{font-size:13px;margin-top:22px}.story-heading{padding:30px 20px 0}.story-heading h2{font-size:30px;max-width:300px}.story-heading p{font-size:13px}.story-layout{display:block;padding:0 20px}.stage-sticky{top:50px;padding-top:10px;margin:15px -20px 0;padding-left:12px;padding-right:12px;background:#14191ff7;z-index:5;border-bottom:1px solid #34414f}.stage{height:36svh;min-height:230px;max-height:360px}.stage-top{left:12px;right:12px;top:12px;font-size:10px}.stage-tools{bottom:10px;left:8px;right:8px;gap:5px}.stage-tools button{min-height:40px;min-width:40px;font-size:12px;padding:8px 10px}.story-tabs{margin-top:10px}.story-tabs a{font-size:11px;min-height:55px;padding:8px 5px 4px;line-height:1.45}.story-tabs b{font-size:11px;margin-bottom:4px}.scheme-note{font-size:10px;line-height:1.5;padding:6px 5px 8px;margin:0;max-width:none}.chapter{min-height:70svh;padding:40px 0 65px;align-items:center;scroll-margin-top:calc(36svh + 195px)}.chapter-inner{max-width:none}.chapter h2{font-size:30px;margin:10px 0 18px}.chapter .eyebrow{font-size:11px}.chapter p{font-size:13px;line-height:1.8}.chapter dl{margin-top:22px}.chapter dl>div{font-size:12px}.section-heading{display:block;margin-bottom:24px}.section-heading h2{font-size:30px}.section-heading .text-link{display:inline-block;margin-top:12px;font-size:13px}.variants{padding-top:35px;padding-bottom:35px}.calculator{display:block}.calculator h2{font-size:26px}.calculator .sub{font-size:13px}.calculator form{margin-top:22px;gap:12px}.calculator input{font-size:16px}.calculator output{font-size:26px}footer{padding:32px 20px 25px;grid-template-columns:1fr;gap:25px}footer h2{font-size:26px}.contact-list{grid-template-columns:1fr;gap:5px;font-size:15px}.contact-list a{min-height:40px;display:flex;align-items:center}.footer-bottom{display:block;font-size:12px}.footer-bottom a{display:block;margin-top:16px}dialog{padding:20px 16px}.dialog-head h2{font-size:26px}.dialog-actions{display:grid;grid-template-columns:1fr 1fr}.dialog-actions .button{font-size:13px;padding:10px}.dialog-actions .button:first-child{grid-column:1/-1}.selection-row{grid-template-columns:46px minmax(0,1fr) auto;gap:8px;font-size:13px}.selection-row img{height:46px;width:46px}.selection-row button{font-size:13px;padding:5px}.field textarea{font-size:16px}.dialog-head+p{font-size:13px}#status{bottom:max(20px,env(safe-area-inset-bottom));font-size:13px}}
@media(max-width:360px){header{padding:0 14px}.brand{font-size:10px}.brand small{font-size:7px}.wrap{padding-left:16px;padding-right:16px}.home-title h1{font-size:32px}.family-content{padding:14px 12px}.family h2{font-size:18px}.family-bottom{display:block}.family-bottom b{display:block;margin-top:4px}.product-photo{height:155px}.card-copy{padding:10px 9px}.product-nav{gap:12px;padding-left:16px;padding-right:16px}.spec-detail h1{font-size:30px}.stage-tools button{font-size:11px;padding:8px}.stage-tools{gap:4px}.story-tabs a{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.family:hover{transform:none}}

@media(max-width:700px) and (max-height:700px){.stage{height:30svh;min-height:180px}.chapter{min-height:80svh}.scheme-note{font-size:9px}}