@import url('fonts.css');

/* ============================================================
   FIBERLUX — дизайн-система
   ============================================================ */
:root{
  --graphite:#14181B;
  --graphite-2:#1C2126;
  --graphite-3:#252B31;
  --white:#F5F4F1;
  --white-72:rgba(245,244,241,.72);
  --white-46:rgba(245,244,241,.46);
  --white-22:rgba(245,244,241,.22);
  --ink:#14181B;
  --ink-64:rgba(20,24,27,.64);
  --ink-40:rgba(20,24,27,.40);
  --paper:#F2F1ED;
  --paper-2:#E7E5DF;
  --brass:#C0A97E;
  --brass-dim:rgba(192,169,126,.42);
  --ice:#9FB4C4;
  --line-dark:rgba(245,244,241,.13);
  --line-light:rgba(20,24,27,.12);
  --maxw:1240px;
  --narrow:720px;
  --head:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --ease:cubic-bezier(.22,.61,.24,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--body);
  background:var(--graphite);
  color:var(--white);
  font-size:17px;
  line-height:1.62;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media(min-width:720px){ body{font-size:19px} }
img,video,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
::selection{background:var(--brass);color:var(--graphite)}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px}

/* ---------- сетка ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(1.25rem,5vw,3rem)}
.narrow{max-width:var(--narrow)}
.section{padding:clamp(4.5rem,11vh,9rem) 0;position:relative}
.section--tight{padding-top:0}
.light{background:var(--paper);color:var(--ink)}
.light .body-text{color:var(--ink-64)}
.light .lede{color:var(--ink-64)}

/* ---------- типографика ---------- */
.eyebrow{
  font-family:var(--body);
  font-size:.76rem;letter-spacing:.24em;text-transform:uppercase;font-weight:600;
  color:var(--brass);display:flex;align-items:center;gap:.85rem;margin-bottom:1.6rem;
}
.eyebrow::before{content:"";width:32px;height:1px;background:var(--brass);opacity:.75;flex:none}
.eyebrow.center{justify-content:center}

h1,h2,h3,h4{font-family:var(--head);font-weight:800;letter-spacing:-.02em;line-height:1.06}
h2{font-size:clamp(2.3rem,5.4vw,4rem);margin-bottom:1.4rem}
h3{font-size:clamp(1.35rem,2.2vw,1.75rem);font-weight:700;line-height:1.18}
.lede{font-size:clamp(1.18rem,1.9vw,1.5rem);line-height:1.5;color:var(--white-72);max-width:46ch;font-weight:400}
.body-text{color:var(--white-72);max-width:62ch}
p + p{margin-top:1.05rem}
.hl{color:var(--brass)}
.light .hl{color:#8A7444}

/* ---------- шапка ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  gap:1.5rem;padding:1.1rem clamp(1.25rem,5vw,3rem);
  transition:background .4s var(--ease),backdrop-filter .4s,border-color .4s;
  border-bottom:1px solid transparent;
}
.nav.stuck{background:rgba(20,24,27,.86);backdrop-filter:blur(14px);border-bottom-color:var(--line-dark)}
.brand{font-family:var(--head);font-weight:700;font-size:1.02rem;letter-spacing:.34em;color:var(--white);white-space:nowrap}
.nav-links{display:none;gap:2rem;font-size:.92rem;color:var(--white-72)}
.nav-links a{transition:color .25s}
.nav-links a:hover{color:var(--brass)}
.nav-tel{display:none;font-size:.95rem;font-weight:500;white-space:nowrap;transition:color .25s}
.nav-tel:hover{color:var(--brass)}
@media(min-width:900px){ .nav-links{display:flex} .nav-tel{display:block} }

/* ---------- герой ---------- */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover;transform:scale(1.06);animation:heroZoom 22s ease-out forwards}
@keyframes heroZoom{to{transform:scale(1.0)}}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,18,21,.72) 0%,rgba(15,18,21,.26) 32%,rgba(15,18,21,.5) 66%,rgba(15,18,21,.95) 100%);
}
.hero-body{position:relative;z-index:2;width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(1.25rem,5vw,3rem) clamp(4rem,10vh,7rem)}
.hero h1{font-size:clamp(2.7rem,7.4vw,6rem);line-height:1.0;max-width:17ch}
.hero-rule{width:60px;height:2px;background:var(--brass);margin:2.2rem 0 1.6rem}
.hero-sub{font-size:clamp(1.1rem,1.8vw,1.4rem);color:var(--white-72);max-width:52ch}
.hero-meta{display:flex;flex-wrap:wrap;gap:.5rem 1.4rem;margin-top:2.4rem;font-size:.95rem;color:var(--white-46);letter-spacing:.02em}
.hero-meta b{color:var(--white);font-weight:600}
.scroll-cue{
  position:absolute;left:50%;bottom:1.4rem;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:.6rem;
  font-size:.68rem;letter-spacing:.26em;text-transform:uppercase;color:var(--white-46);
}
.scroll-cue i{width:1px;height:38px;background:linear-gradient(var(--brass),transparent);animation:cue 2.4s ease-in-out infinite}
@keyframes cue{0%,100%{opacity:.25;transform:scaleY(.55);transform-origin:top}50%{opacity:1;transform:scaleY(1)}}

/* ---------- триада компромисса ---------- */
.triad{display:grid;grid-template-columns:1fr;gap:clamp(2rem,5vw,4rem);align-items:center;margin-top:3rem}
@media(min-width:900px){ .triad{grid-template-columns:1fr 1fr} }
.venn{width:100%;max-width:460px;margin:0 auto}
.venn circle{transition:transform 1.4s var(--ease),opacity 1.2s var(--ease);transform-origin:center;transform-box:fill-box}
.venn .c1{transform:translateY(-46px)}
.venn .c2{transform:translate(40px,34px)}
.venn .c3{transform:translate(-40px,34px)}
.in .venn .c1,.in .venn .c2,.in .venn .c3{transform:none}
.venn text{font-family:var(--head);font-weight:700;font-size:15px;fill:var(--ink)}
.venn .core{opacity:0;transition:opacity .7s .9s var(--ease)}
.in .venn .core{opacity:1}
.mat-list{display:grid;gap:1px;background:var(--line-light);border-top:1px solid var(--line-light);border-bottom:1px solid var(--line-light);margin-top:2.6rem}
.mat{background:var(--paper);padding:1.35rem .2rem;display:grid;grid-template-columns:8.5rem 1fr;gap:1.2rem;align-items:baseline}
.mat b{font-family:var(--head);font-weight:700;font-size:1.05rem}
.mat span{color:var(--ink-64);font-size:.98rem}
@media(max-width:560px){ .mat{grid-template-columns:1fr;gap:.25rem} }

/* ---------- 3D-секция ---------- */
.stage-wrap{position:relative;margin-top:3rem;border:1px solid var(--line-dark);border-radius:3px;overflow:hidden;background:linear-gradient(160deg,#1B2126,#141819)}
#profile-stage{width:100%;aspect-ratio:16/10;display:block;touch-action:pan-y}
.stage-fallback{width:100%;aspect-ratio:16/10;object-fit:contain;background:#F7F8FA}
.stage-hint{
  position:absolute;left:50%;bottom:1rem;transform:translateX(-50%);
  font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--white-46);
  pointer-events:none;transition:opacity .5s;background:rgba(20,24,27,.5);
  padding:.45rem .95rem;border-radius:999px;backdrop-filter:blur(6px);white-space:nowrap;
}
.stage-wrap.touched .stage-hint{opacity:0}
.layer-legend{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.4rem}
.layer-btn{
  display:flex;align-items:center;gap:.6rem;padding:.6rem 1.05rem;
  border:1px solid var(--line-dark);border-radius:999px;font-size:.92rem;color:var(--white-72);
  transition:border-color .25s,color .25s,background .25s;
}
.layer-btn:hover,.layer-btn[aria-pressed="true"]{border-color:var(--brass);color:var(--white);background:rgba(192,169,126,.1)}
.layer-btn i{width:11px;height:11px;border-radius:50%;flex:none}

/* ---------- цифры ---------- */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line-dark);border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark);margin-top:3.2rem}
@media(min-width:820px){ .stats{grid-template-columns:repeat(3,1fr)} }
.stat{background:var(--graphite);padding:2rem 1.4rem}
.stat .n{font-family:var(--head);font-weight:800;font-size:clamp(2rem,4.4vw,3rem);color:var(--brass);line-height:1;letter-spacing:-.02em}
.stat .n small{font-size:.44em;font-weight:700;letter-spacing:0;margin-left:.15em}
.stat .l{font-size:.9rem;color:var(--white-46);margin-top:.7rem;line-height:1.4}

/* ---------- бар-чарт ---------- */
.charts{display:grid;grid-template-columns:1fr;gap:clamp(2.4rem,5vw,4rem);margin-top:3.4rem}
@media(min-width:820px){ .charts{grid-template-columns:1fr 1fr} }
.chart h4{font-family:var(--head);font-weight:700;font-size:1.06rem;margin-bottom:.3rem}
.chart .cap{font-size:.9rem;color:var(--white-46);margin-bottom:1.8rem}
.bars{display:flex;align-items:flex-end;gap:clamp(1rem,4vw,2.4rem);height:210px;border-bottom:1px solid var(--line-dark);padding-bottom:0}
.bar{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%}
.bar .v{font-family:var(--head);font-weight:700;font-size:1.05rem;margin-bottom:.5rem;color:var(--white-72)}
.bar .fill{width:100%;background:var(--graphite-3);height:0;transition:height 1.2s var(--ease)}
.bar.win .v{color:var(--brass);font-size:1.35rem}
.bar.win .fill{background:var(--brass)}
.bar-labels{display:flex;gap:clamp(1rem,4vw,2.4rem);margin-top:.8rem}
.bar-labels span{flex:1;text-align:center;font-size:.84rem;color:var(--white-46)}
.bar-labels span.win{color:var(--brass);font-weight:600}

/* ---------- тепловизор ---------- */
.thermo{position:relative;margin-top:3rem;border:1px solid var(--line-light);background:#fff;overflow:hidden}
.thermo img{width:100%;height:auto}
.thermo-seam{position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--brass);transform:scaleY(0);transform-origin:top;transition:transform 1.1s .2s var(--ease)}
.in .thermo-seam{transform:scaleY(1)}
.thermo-tag{
  position:absolute;top:1.1rem;font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;font-weight:600;
  padding:.45rem .85rem;border-radius:2px;opacity:0;transition:opacity .6s 1s var(--ease);white-space:nowrap;
}
.in .thermo-tag{opacity:1}
.thermo-tag.l{left:1.1rem;background:var(--brass);color:var(--graphite)}
.thermo-tag.r{right:1.1rem;background:rgba(20,24,27,.82);color:var(--white)}
@media(max-width:600px){ .thermo-tag{font-size:.62rem;padding:.3rem .5rem;top:.5rem} }

/* ---------- скраб-видео ---------- */
.scrub{position:relative}
.scrub-track{height:260vh;position:relative}
.scrub-pin{position:sticky;top:0;height:100svh;display:flex;align-items:center;overflow:hidden}
.scrub-inner{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(1.25rem,5vw,3rem);display:grid;grid-template-columns:1fr;gap:2rem;align-items:center}
@media(min-width:900px){ .scrub-inner{grid-template-columns:1fr 1.05fr;gap:clamp(2rem,5vw,4.5rem)} }
.scrub-video{position:relative;width:100%;max-width:420px;margin:0 auto;border-radius:3px;overflow:hidden;background:var(--graphite-2);box-shadow:0 30px 80px rgba(0,0,0,.45)}
.scrub-video video{width:100%;height:auto;display:block}
.scrub-steps{position:relative;min-height:9.5rem}
.scrub-step{position:absolute;inset:0;opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);pointer-events:none}
.scrub-step.on{opacity:1;transform:none}
.scrub-step h3{margin-bottom:.7rem}
.scrub-step p{color:var(--white-72);font-size:1.02rem}
.scrub-dots{display:flex;gap:.5rem;margin-top:2rem}
.scrub-dots i{width:26px;height:2px;background:var(--white-22);transition:background .4s}
.scrub-dots i.on{background:var(--brass)}
@media(max-width:899px){
  .scrub-track{height:auto}
  .scrub-pin{position:static;height:auto;padding:clamp(3rem,8vh,5rem) 0}
  .scrub-steps{position:static;min-height:0;display:grid;gap:1.8rem}
  .scrub-step{position:static;opacity:1;transform:none}
  .scrub-dots{display:none}
}

/* ---------- карточки систем ---------- */
.sys-grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line-dark);border:1px solid var(--line-dark);margin-top:3.2rem}
@media(min-width:680px){ .sys-grid{grid-template-columns:1fr 1fr} }
@media(min-width:1000px){ .sys-grid{grid-template-columns:repeat(3,1fr)} }
.sys{background:var(--graphite);padding:2.1rem 1.8rem;display:flex;flex-direction:column;gap:.6rem;transition:background .3s}
.sys:hover{background:var(--graphite-2)}
.sys .num{font-family:var(--head);font-weight:800;font-size:2.5rem;color:var(--brass);line-height:1;letter-spacing:-.03em}
.sys .num span{font-size:.42em;color:var(--white-46);margin-left:.35em;letter-spacing:.02em}
.sys h3{font-size:1.12rem;font-weight:700}
.sys p{font-size:.96rem;color:var(--white-72)}
.sys .tag{margin-top:auto;padding-top:1.2rem;font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--white-46)}

/* ---------- огнестойкость ---------- */
.fire-grid{display:grid;grid-template-columns:1fr;gap:clamp(2rem,5vw,4rem);align-items:center;margin-top:3rem}
@media(min-width:900px){ .fire-grid{grid-template-columns:.95fr 1fr} }
.vbox{position:relative;background:var(--graphite-2);border-radius:3px;overflow:hidden;max-width:400px;margin:0 auto;width:100%}
.vbox video{width:100%;height:auto;display:block}
.vbox-cover{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;background:rgba(15,18,21,.28);transition:background .3s}
.vbox-cover:hover{background:rgba(15,18,21,.12)}
.play{width:66px;height:66px;border:1px solid var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(20,24,27,.34);backdrop-filter:blur(3px);transition:transform .3s,border-color .3s}
.vbox-cover:hover .play{transform:scale(1.07);border-color:var(--brass)}
.play::after{content:"";margin-left:5px;border-left:16px solid var(--white);border-top:10px solid transparent;border-bottom:10px solid transparent;transition:border-left-color .3s}
.vbox-cover:hover .play::after{border-left-color:var(--brass)}
.vbox-cover span{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--white-72)}
.vbox.playing .vbox-cover{display:none}
.fire-facts{display:grid;gap:1.6rem;margin-top:2.4rem}
.fire-fact{display:grid;grid-template-columns:auto 1fr;gap:1.1rem;align-items:baseline}
.fire-fact b{font-family:var(--head);font-weight:800;font-size:1.3rem;color:var(--brass);white-space:nowrap}
.fire-fact span{color:var(--white-72);font-size:1rem}

/* ---------- переключатель отделок ---------- */
.finish{display:grid;grid-template-columns:1fr;gap:clamp(2rem,4vw,3.4rem);margin-top:3rem;align-items:start}
@media(min-width:900px){ .finish{grid-template-columns:1.15fr 1fr} }
.finish-stage{position:relative;aspect-ratio:4/3;background:var(--paper-2);border:1px solid var(--line-light);overflow:hidden}
.finish-stage img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .6s var(--ease)}
.finish-stage img.on{opacity:1}
.finish-tabs{display:grid;gap:1px;background:var(--line-light);border:1px solid var(--line-light)}
.finish-tab{background:var(--paper);padding:1.4rem 1.5rem;text-align:left;transition:background .3s}
.finish-tab[aria-selected="true"]{background:#fff}
.finish-tab b{display:block;font-family:var(--head);font-weight:700;font-size:1.1rem;margin-bottom:.3rem}
.finish-tab span{font-size:.95rem;color:var(--ink-64)}
.finish-tab[aria-selected="true"] b{color:#8A7444}

/* ---------- применение ---------- */
.apply-grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line-dark);border:1px solid var(--line-dark);margin-top:3.2rem}
@media(min-width:680px){ .apply-grid{grid-template-columns:1fr 1fr} }
.apply{background:var(--graphite);padding:2rem 1.8rem}
.apply h3{font-size:1.08rem;margin-bottom:.9rem}
.apply ul{list-style:none;display:grid;gap:.45rem}
.apply li{font-size:.98rem;color:var(--white-72);padding-left:1.1rem;position:relative}
.apply li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:1px;background:var(--brass)}

/* ---------- кейс ---------- */
.case{background:var(--graphite-2)}
.case-video{position:relative;margin-top:3rem;border-radius:3px;overflow:hidden;background:#000;box-shadow:0 30px 90px rgba(0,0,0,.5)}
.case-video video{width:100%;height:auto;display:block}
.case-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line-dark);border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark);margin-top:3rem}
@media(min-width:760px){ .case-stats{grid-template-columns:repeat(3,1fr)} }
.case-stats .stat{background:var(--graphite-2)}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:.6rem;margin-top:3rem}
@media(min-width:760px){ .gallery{grid-template-columns:repeat(4,1fr);gap:.75rem} }
.gallery figure{margin:0;overflow:hidden;background:var(--graphite-3);aspect-ratio:4/3}
.gallery figure.tall{aspect-ratio:3/4}
.gallery figure.wide{grid-column:span 2}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.gallery figure:hover img{transform:scale(1.05)}
.credit{
  display:flex;flex-wrap:wrap;align-items:center;gap:1.1rem 1.6rem;
  margin-top:3rem;padding:1.7rem 0 0;border-top:1px solid var(--line-dark);
}
.credit img{height:26px;width:auto;filter:brightness(0) invert(1);opacity:.82}
.credit p{font-size:.98rem;color:var(--white-72);flex:1 1 18rem;margin:0}
.credit a{color:var(--brass);border-bottom:1px solid var(--brass-dim);transition:color .25s,border-color .25s}
.credit a:hover{color:var(--white);border-color:var(--white)}

/* ---------- документы ---------- */
.docs{margin-top:3rem;background:#fff;border:1px solid var(--line-light);padding:1.4rem}
.docs img{width:100%;height:auto}
.doc-tags{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:2rem}
.doc-tag{font-size:.82rem;letter-spacing:.06em;padding:.5rem .95rem;border:1px solid var(--line-light);border-radius:2px;color:var(--ink-64)}

/* ---------- контакты ---------- */
.contacts{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line-dark);border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark);margin-top:3.2rem}
@media(min-width:760px){ .contacts{grid-template-columns:1fr 1fr} }
.contact{background:var(--graphite);padding:2.4rem 1.9rem}
.contact .role{font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:var(--brass);margin-bottom:1rem}
.contact .who{font-family:var(--head);font-weight:700;font-size:1.25rem;margin-bottom:1.1rem}
.contact .tel{font-family:var(--head);font-weight:800;font-size:clamp(1.5rem,3.2vw,2.05rem);letter-spacing:-.01em;transition:color .25s;display:inline-block}
.contact .tel:hover{color:var(--brass)}
.contact .mail{display:inline-block;margin-top:.9rem;font-size:1rem;color:var(--white-72);border-bottom:1px solid var(--line-dark);transition:color .25s,border-color .25s}
.contact .mail:hover{color:var(--brass);border-color:var(--brass-dim)}
.addr{margin-top:3rem;display:flex;flex-wrap:wrap;gap:.6rem 2.4rem;font-size:1rem;color:var(--white-72)}
.addr a{border-bottom:1px solid var(--line-dark);transition:color .25s,border-color .25s}
.addr a:hover{color:var(--brass);border-color:var(--brass-dim)}

/* ---------- подвал ---------- */
.footer{border-top:1px solid var(--line-dark);padding:2.8rem 0;font-size:.92rem;color:var(--white-46)}
.footer-in{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1.2rem}
.footer a{color:var(--white-72);transition:color .25s}
.footer a:hover{color:var(--brass)}
.footer-social{display:flex;gap:1.3rem}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1!important;transform:none!important;transition:none}
  .scroll-cue i{animation:none}
  .hero-media img{animation:none;transform:none}
  .venn circle{transform:none!important;transition:none}
  .scrub-track{height:auto}
  .scrub-pin{position:static;height:auto;padding:4rem 0}
  .scrub-steps{position:static;min-height:0;display:grid;gap:1.8rem}
  .scrub-step{position:static;opacity:1;transform:none}
}