:root{
  --bg:#0a0e14; --bg-2:#0f141d; --panel:#121823; --panel-2:#161d29;
  --line:#1f2937; --line-2:#2a3543;
  --text:#e8edf4; --muted:#94a3b8; --muted-2:#6b7a8d;
  --orange:#ff7a18; --orange-soft:#ff9d52; --teal:#28e0c8; --teal-2:#16b9a4;
  --accent-grad:linear-gradient(120deg,#ff7a18,#ff9d52 40%,#28e0c8);
  --radius:18px; --shadow:0 18px 50px rgba(0,0,0,.45); --maxw:1180px;
}
/* светлая тема */
body.light{
  --bg:#f5f7fa; --bg-2:#eef1f6; --panel:#ffffff; --panel-2:#f7f9fc;
  --line:#e2e8f0; --line-2:#cbd5e1; --text:#0f1722; --muted:#51607a; --muted-2:#8a97a8;
  --shadow:0 18px 50px rgba(20,40,80,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
img,video,canvas,svg{max-width:100%;height:auto;display:block}
body{font-family:"Manrope",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased;transition:background .4s,color .4s}
body.light .hero-photo{opacity:.25}
body.light .grain{opacity:.03}

.bg-grid{position:fixed;inset:-20% -20% -20% -20%;z-index:-3;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:54px 54px;mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 75%);animation:gridmove 22s linear infinite}
@keyframes gridmove{0%{transform:translate(0,0)}100%{transform:translate(54px,54px)}}
.hero-photo{position:fixed;inset:0;z-index:-2;background:url("bg-hero.jpg") center/cover no-repeat;opacity:.85;transform:scale(1.08);animation:herozoom 28s ease-in-out infinite alternate;will-change:transform}
@keyframes herozoom{0%{transform:scale(1.08) translate(0,0)}50%{transform:scale(1.14) translate(-1.5%,1.5%)}100%{transform:scale(1.08) translate(1.5%,-1.5%)}}
.hero-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,20,.55),rgba(10,14,20,.35) 40%,rgba(10,14,20,.92))}
body.light .hero-photo::after{background:linear-gradient(180deg,rgba(245,247,250,.4),rgba(245,247,250,.2) 40%,rgba(245,247,250,.95))}
.grain{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.05;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>")}

/* плавающий градиентный орб (живой фон поверх фото) */
.aura{position:fixed;z-index:-1;pointer-events:none;filter:blur(60px);opacity:.5;mix-blend-mode:screen}
.aura-1{top:-10%;left:-10%;width:50vw;height:50vw;background:radial-gradient(circle,#ff7a18,transparent 60%);animation:aura1 26s ease-in-out infinite}
.aura-2{bottom:-15%;right:-10%;width:45vw;height:45vw;background:radial-gradient(circle,#28e0c8,transparent 60%);animation:aura2 32s ease-in-out infinite}
@keyframes aura1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(18vw,12vh) scale(1.18)}}
@keyframes aura2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-16vw,-14vh) scale(1.22)}}

.floaters{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.floater{position:absolute;width:240px;height:240px;opacity:.18;filter:drop-shadow(0 0 18px rgba(40,224,200,.25))}
.floater svg{width:100%;height:100%}
.floater-1{top:16%;left:6%;animation:float1 9s ease-in-out infinite}
.floater-2{top:55%;right:7%;animation:float2 12s ease-in-out infinite}
.floater-3{bottom:8%;left:38%;animation:float3 11s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-44px) rotate(10deg)}}
@keyframes float2{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(38px) rotate(-11deg)}}
@keyframes float3{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-30px) rotate(7deg)}}

.theme-toggle{position:fixed;bottom:22px;right:22px;z-index:60;width:52px;height:52px;border-radius:50%;border:1px solid var(--line-2);background:var(--panel);color:var(--text);font-size:20px;cursor:pointer;box-shadow:var(--shadow);transition:.25s}
.theme-toggle:hover{border-color:var(--orange);transform:scale(1.08)}

.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:1000;display:flex;align-items:center;gap:24px;padding:16px clamp(18px,5vw,52px);background:rgba(10,14,20,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
body.light .site-header{background:rgba(245,247,250,.7)}
.brand{display:flex;flex-direction:column;line-height:1;text-decoration:none;color:var(--text)}
.brand-mark{font-family:"Unbounded",sans-serif;font-weight:800;font-size:22px;letter-spacing:1px;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-sub{font-size:11px;color:var(--muted-2);letter-spacing:3px;text-transform:uppercase;margin-top:3px}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{color:var(--muted);text-decoration:none;font-weight:500;font-size:15px;transition:color .2s;position:relative}
.nav a:hover{color:var(--text)}
.nav a::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--accent-grad);transition:width .25s}
.nav a:hover::after{width:100%}
.nav-cta{margin-left:8px}
.burger{display:none;background:none;border:none;color:var(--text);font-size:28px;cursor:pointer;margin-left:auto}
/* мобильная навигация */
@media(max-width:820px){
  .nav{display:none;margin-left:0}
  .burger{display:block}
  .mobile-open .nav{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--bg-2);padding:20px clamp(18px,5vw,52px);border-bottom:1px solid var(--line);gap:18px;max-height:calc(100vh - 64px);overflow-y:auto}
  .nav-cta{margin-left:0}
  /* на телефоне оставляем живой фон: сетка + ауры (без тяжёлых floaters) */
  .hero-photo{animation:herozoom 30s ease-in-out infinite alternate}
  .floaters{display:none}
  .aura{opacity:.4}
  .aura-1{width:70vw;height:70vw}
  .aura-2{width:60vw;height:60vw}
  .bg-grid{background-size:44px 44px;animation:gridmove 26s linear infinite}
}
@media(max-width:480px){
  .cards,.obj-grid,.contacts,.steps,.museum{grid-template-columns:1fr !important}
  .hero-stats{grid-template-columns:1fr !important}
  .sro{flex-direction:column;text-align:center;padding:28px}
  .site-header{gap:12px;padding:12px 16px}
  .brand{font-size:15px}
  .brand-sub{letter-spacing:1.5px}
  .hero h1{font-size:clamp(28px,8vw,40px);line-height:1.1}
  .hero-lead{font-size:15px}
  .section{padding:54px 0}
  .section-head h2{font-size:clamp(24px,7vw,32px)}
  .exhibit-img{aspect-ratio:16/10}
  .contact-card{padding:22px}
  .site-footer{flex-direction:column;text-align:center;gap:10px}
  .foot-copy{margin-left:0}
}

.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:12px;font-weight:600;font-size:15px;text-decoration:none;transition:transform .18s,box-shadow .25s,background .25s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--accent-grad);color:#0a0e14;box-shadow:0 10px 30px rgba(255,122,24,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(40,224,200,.35)}
.btn-ghost{border-color:var(--line-2);color:var(--text);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--orange);color:var(--orange-soft);transform:translateY(-2px)}

.hero{min-height:96vh;display:flex;align-items:center;padding:80px clamp(18px,5vw,52px) 40px;position:relative}
.hero-inner{max-width:var(--maxw);margin:0 auto;width:100%;position:relative;z-index:2}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;text-transform:uppercase;color:var(--teal);font-weight:600;padding:7px 14px;border:1px solid var(--line-2);border-radius:999px;background:rgba(40,224,200,.06);margin-bottom:26px}
.hero-title{font-family:"Unbounded",sans-serif;font-weight:800;line-height:1.04;font-size:clamp(38px,6.4vw,82px);letter-spacing:-1px;text-shadow:0 2px 30px rgba(0,0,0,.5)}
.hero-title .accent{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{max-width:680px;font-size:clamp(16px,1.6vw,20px);color:#cdd6e2;margin:26px 0 36px;text-shadow:0 1px 16px rgba(0,0,0,.6)}
body.light .hero-lead{color:var(--muted)}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:56px;padding-top:34px;border-top:1px solid rgba(255,255,255,.12)}
body.light .hero-stats{border-top:1px solid var(--line)}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats b{font-family:"Unbounded",sans-serif;font-size:clamp(28px,3.4vw,42px);color:var(--text);line-height:1}
.hero-stats span{font-size:13px;color:var(--muted);margin-top:8px;letter-spacing:.3px}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:24px;color:var(--teal);animation:bob 1.8s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,10px)}}

.section{padding:clamp(60px,8vw,110px) clamp(18px,5vw,52px)}
.section-alt{background:linear-gradient(180deg,rgba(15,20,29,.96),rgba(10,14,20,.96));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
body.light .section-alt{background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.section-head{max-width:var(--maxw);margin:0 auto 52px;text-align:center}
.section-head .eyebrow{margin-bottom:18px}
.section-head h2{font-family:"Unbounded",sans-serif;font-weight:700;font-size:clamp(28px,4vw,46px);letter-spacing:-.5px;line-height:1.1}
.section-head p{color:var(--muted);max-width:620px;margin:18px auto 0;font-size:16px}

.cards{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:rgba(18,24,35,.82);border:1px solid var(--line);border-radius:var(--radius);padding:30px;position:relative;overflow:hidden;backdrop-filter:blur(6px);transition:transform .25s,border-color .25s,background .25s}
body.light .card{background:var(--panel)}
.card::before{content:"";position:absolute;inset:0;background:var(--accent-grad);opacity:0;transition:opacity .3s}
.card:hover{transform:translateY(-6px);border-color:var(--line-2)}
.card:hover::before{opacity:.07}
.card-ic{width:54px;height:54px;display:grid;place-items:center;border-radius:14px;font-size:26px;background:rgba(255,122,24,.1);color:var(--orange);margin-bottom:18px;border:1px solid rgba(255,122,24,.2)}
.card h3{font-size:19px;font-weight:700;margin-bottom:10px;position:relative}
.card p{color:var(--muted);font-size:15px;position:relative}

/* объекты */
.obj-filter{max-width:var(--maxw);margin:0 auto 28px;display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.obj-chip{border:1px solid var(--line-2);background:transparent;color:var(--muted);padding:9px 16px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:.2s}
.obj-chip:hover{border-color:var(--teal);color:var(--text)}
.obj-chip.active{background:var(--accent-grad);color:#0a0e14;border-color:transparent}
.obj-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.obj{background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .25s,border-color .25s;position:relative}
.obj:hover{transform:translateY(-6px);border-color:var(--teal-2)}
.obj.hide{display:none}
.obj .tag{display:inline-block;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--teal);font-weight:600;margin-bottom:10px}
.obj h3{font-size:18px;font-weight:700;margin-bottom:8px;line-height:1.25}
.obj p{color:var(--muted);font-size:14px}
.obj-note{max-width:var(--maxw);margin:30px auto 0;color:var(--muted-2);font-size:13.5px;text-align:center}

/* музей исторических сетей */
.museum{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.exhibit{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:border-color .3s,transform .3s}
.exhibit:hover{border-color:var(--line-2);transform:translateY(-6px)}
.exhibit-img{position:relative;aspect-ratio:4/3;overflow:hidden;border-bottom:1px solid var(--line);filter:grayscale(1) contrast(1.06) sepia(.12)}
.exhibit-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease,filter .4s}
.exhibit:hover .exhibit-img img{transform:scale(1.06);filter:grayscale(0) contrast(1.04)}
.exhibit-img::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(10,14,20,.15),rgba(10,14,20,.6))}
.exhibit-yr{position:absolute;top:12px;left:14px;z-index:2;font-family:"Unbounded",sans-serif;font-weight:800;font-size:20px;color:var(--orange-soft);text-shadow:0 2px 10px #000}
.exhibit-body{padding:22px 24px 24px}
.exhibit-body h3{font-size:19px;font-weight:700;margin-bottom:8px}
.exhibit-cap{color:var(--muted);font-size:14.5px}
.exhibit-more{max-height:0;overflow:hidden;opacity:0;transition:max-height .5s ease,opacity .4s ease,margin .4s ease}
.exhibit.open .exhibit-more{max-height:500px;opacity:1;margin-top:12px}
.exhibit-more p{color:var(--muted);font-size:14.5px;line-height:1.55}
.exhibit-toggle{margin-top:14px;background:none;border:1px solid var(--line-2);color:var(--teal);font-weight:600;font-size:13.5px;padding:8px 15px;border-radius:10px;cursor:pointer;transition:.2s}
.exhibit-toggle:hover{border-color:var(--teal);background:rgba(40,224,200,.06)}
.exhibit.open .exhibit-toggle{color:var(--orange-soft);border-color:var(--orange)}
@media(max-width:980px){.museum{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.museum{grid-template-columns:1fr}}

/* шаги */
.steps{max-width:var(--maxw);margin:0 auto;list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps li{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px;position:relative}
.step-n{font-family:"Unbounded",sans-serif;font-size:34px;font-weight:800;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent;display:block;margin-bottom:14px}
.steps h3{font-size:18px;margin-bottom:8px}
.steps p{color:var(--muted);font-size:14.5px}

/* СРО */
.sro{max-width:var(--maxw);margin:0 auto;display:flex;gap:32px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.sro-badge{flex:0 0 auto;width:120px;height:120px;border-radius:24px;display:grid;place-items:center;font-family:"Unbounded",sans-serif;font-weight:800;font-size:30px;color:#0a0e14;background:var(--accent-grad);box-shadow:var(--shadow);text-align:center;line-height:1}
.sro h2{font-family:"Unbounded",sans-serif;font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.sro p{color:var(--muted);font-size:15.5px}
.sro-facts{list-style:none;display:flex;gap:14px;flex-wrap:wrap;margin-top:18px}
.sro-facts li{font-size:13px;color:var(--text);background:var(--bg);border:1px solid var(--line);padding:8px 14px;border-radius:10px}

/* контакты */
.contacts{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.contact-card h3{font-size:14px;letter-spacing:1px;text-transform:uppercase;color:var(--muted-2);margin-bottom:12px;font-weight:600}
.contact-card h3.mt{margin-top:24px}
.contact-card a{display:block;color:var(--text);text-decoration:none;font-size:18px;font-weight:600;margin-bottom:6px;transition:color .2s}
.contact-card a:hover{color:var(--orange-soft)}
.contact-card p{color:var(--muted);font-size:15px}

.site-footer{max-width:var(--maxw);margin:0 auto;padding:40px clamp(18px,5vw,52px);display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;border-top:1px solid var(--line);color:var(--muted-2);font-size:14px}
.foot-brand{font-family:"Unbounded",sans-serif;font-weight:700;color:var(--text)}
.foot-meta{flex:1}
.foot-copy{margin-left:auto}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

@media(max-width:980px){.cards,.obj-grid,.contacts,.steps{grid-template-columns:repeat(2,1fr)}.project-wide{grid-column:span 2}.hero-stats{grid-template-columns:repeat(2,1fr);gap:26px}}
.mobile-open .nav{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--bg-2);padding:20px clamp(18px,5vw,52px);border-bottom:1px solid var(--line);gap:18px}