/* ==========================================================================
   ПоСтройка — design tokens
   Palette drawn from the materials themselves, not a generic template.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root{
  --charcoal: #221F1B;
  --charcoal-2: #2C2823;
  --paper: #F2EDE1;
  --paper-2: #E8E0CF;
  --ink: #221F1B;
  --ink-soft: #59503F;
  --sand: #C0904C;
  --granite: #56666C;
  --rust: #A8472A;
  --rust-dark: #883A22;
  --line: #D8CFB8;
  --line-dark: #423C33;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 3px;
  --container: 1180px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  margin: 0 0 .5em;
  line-height: 1.12;
  letter-spacing: -0.01em;
}
p{ margin: 0 0 1em; }
.mono{ font-family: var(--font-mono); }

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--rust);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------- eyebrow / kicker ---------- */
.kicker{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--rust);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom: 14px;
}
.kicker::before{
  content:"";
  width: 18px; height: 2px;
  background: var(--rust);
  display:inline-block;
}

/* ---------- topbar ---------- */
.topbar{
  background: var(--charcoal);
  color: #C9C2B2;
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.topbar .container{
  display:flex;
  justify-content: space-between;
  align-items:center;
  padding-top: 3px;
  padding-bottom: 3px;
  flex-wrap: wrap;
  gap: 6px;
}
.topbar a{ text-decoration:none; color:#C9C2B2; }
.topbar a:hover{ color:#fff; }
.topbar .tb-right{ display:flex; gap:20px; }

/* ---------- header / nav ---------- */
header.site{
  background: var(--charcoal);
  color: #F2EDE1;
  border-bottom: 1px solid var(--line-dark);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow .2s ease;
}
header.site.scrolled{
  box-shadow: 0 8px 24px -12px rgba(0,0,0,.5);
}
.nav-row{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 24px;
  position: relative;
}
.logo{
  font-family: var(--font-display);
  font-weight:700;
  font-size: 22px;
  text-decoration:none;
  color:#F2EDE1;
  display:flex;
  align-items:center;
  gap: 10px;
  margin-left: 30px;
}
.logo img{
  height: 70px;
  width: auto;
  display:block;
}
.logo small{
  font-family: var(--font-mono);
  font-size: 11px;
  color:#8f8878;
  font-weight:400;
  letter-spacing:.05em;
}
.footer-logo{
  height: 90px;
  width:auto;
  display:block;
  margin-bottom:14px;
}
nav.primary{ display:flex; gap: 30px; }
nav.primary a{
  text-decoration:none;
  color:#D8D2C3;
  font-size: 14.5px;
  font-weight:500;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: border-color .15s, color .15s;
}
nav.primary a:hover, nav.primary a.active{
  color:#fff;
  border-color: var(--rust);
}
.nav-cta{ display:flex; align-items:center; gap:14px; }
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family: var(--font-body);
  font-weight:600;
  font-size: 14.5px;
  padding: 11px 22px;
  border-radius: var(--radius);
  text-decoration:none;
  border: 1px solid transparent;
  cursor:pointer;
  transition: transform .12s ease, background .15s, border-color .15s, color .15s;
}
.btn:hover{ transform: translateY(-1px); }
.btn-rust{ background: var(--rust); color:#fff; }
.btn-rust:hover{ background: var(--rust-dark); }
.btn-ghost{ background:transparent; border-color:#5C5648; color:#F2EDE1; }
.btn-ghost:hover{ border-color:#F2EDE1; }
.btn-dark{ background: var(--charcoal); color:#F2EDE1; }
.btn-dark:hover{ background:#111; }
.btn-outline{ background:transparent; border-color: var(--ink); color:var(--ink); }
.btn-outline:hover{ background: var(--ink); color:#fff; }
.btn-sm{ padding: 8px 16px; font-size:13.5px; }

.mobile-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:36px;height:36px;
  background:transparent;
  border:1px solid #5C5648;
  border-radius: var(--radius);
  cursor:pointer;
  padding:0;
  flex-shrink:0;
}
.mobile-toggle span{
  display:block;
  height:2px;
  width:16px;
  background:#F2EDE1;
  transition: transform .2s ease, opacity .2s ease;
}
header.site.nav-open .mobile-toggle span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
header.site.nav-open .mobile-toggle span:nth-child(2){ opacity:0; }
header.site.nav-open .mobile-toggle span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* ---------- hero ---------- */
.hero{
  background: var(--charcoal);
  color:#F2EDE1;
  position:relative;
  overflow:hidden;
  padding: 76px 0 92px;
}
.hero .container{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 56px;
  align-items:stretch;
}
.hero > .container > div:first-child{
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.hero-quote{
  margin-top: 32px;
  padding: 20px 22px;
  border-left: 3px solid var(--sand);
  background: rgba(255,255,255,.04);
}
.hero-quote p{
  font-size: 14.5px;
  color: #D8D2C3;
  margin: 0 0 10px;
  font-style: italic;
}
.hero-quote span{
  font-size: 11.5px;
  color: #A7A090;
}
.hero h1{
  font-size: clamp(34px, 4.4vw, 54px);
  color:#fff;
}
.hero h1 em{ font-style:normal; color: var(--sand); }
.hero p.lead{
  font-size: 17px;
  color:#C9C2B2;
  max-width: 46ch;
}
.hero-ctas{ display:flex; gap:14px; margin-top: 28px; flex-wrap:wrap; }
.hero-chips{
  display:flex; flex-wrap:wrap; gap: 10px 22px;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line-dark);
}
.hero-chip{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: #A7A090;
  display:flex; align-items:center; gap:8px;
}
.hero-chip::before{ content:"◆"; color: var(--rust); font-size:9px; }

/* ---------- core sample (signature element) ---------- */
.core-sample{
  position:relative;
  border-radius: var(--radius);
  overflow:hidden;
  border: 1px solid var(--line-dark);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.55);
  height: 100%;
  min-height: 420px;
}
.core-sample .strata{
  display:flex;
  flex-direction:column;
  height: 100%;
}
.core-sample .layer{
  flex:1;
  position:relative;
  background-size: 130%;
  background-position: center;
  opacity: 0;
  animation: layerIn .7s ease forwards, layerPan 26s ease-in-out infinite alternate;
  animation-delay: 0s, .8s;
  transition: transform .25s ease;
}
.core-sample .layer:nth-child(2){ animation-delay: .12s, 3s; animation-duration: .7s, 22s; }
.core-sample .layer:nth-child(3){ animation-delay: .24s, 1.4s; animation-duration: .7s, 30s; }
.core-sample .layer:nth-child(4){ animation-delay: .36s, 4.2s; animation-duration: .7s, 24s; }
@keyframes layerIn{
  from{ opacity:0; transform: translateY(16px); }
  to{ opacity:1; transform: translateY(0); }
}
@keyframes layerPan{
  from{ background-position: 50% 30%; }
  to{ background-position: 50% 70%; }
}
.core-sample:hover .layer{ transform: scale(1.015); }
.core-sample .layer::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(90deg, rgba(34,31,27,.55) 0%, rgba(34,31,27,.15) 45%, rgba(34,31,27,0) 70%);
}
.core-sample .layer + .layer{
  border-top: 1px solid rgba(0,0,0,.35);
}
.core-sample .tag{
  position:absolute;
  right:14px; top: 50%; transform:translateY(-50%);
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255,255,255,.85);
  text-shadow: 0 1px 2px rgba(0,0,0,.4);
  writing-mode: vertical-rl;
  transition: transform .2s ease;
}
.core-sample .ruler{
  position:absolute; left:0; top:0; bottom:0; width:28px;
  background: rgba(0,0,0,.18);
  border-right: 1px solid rgba(255,255,255,.15);
}
.core-sample .ruler span{
  position:absolute; left:6px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  color: rgba(255,255,255,.55);
}

/* ---------- sections ---------- */
section{ padding: 84px 0; }
section.tight{ padding: 56px 0; }
.section-head{
  max-width: 640px;
  margin-bottom: 44px;
}
.section-head h2{ font-size: clamp(26px, 3vw, 36px); }
.section-head p{ color: var(--ink-soft); font-size: 16px; }
.section-alt{ background: var(--paper-2); }
.section-dark{ background: var(--charcoal); color:#F2EDE1; }
.section-dark .section-head p{ color:#B9B2A2; }

/* ---------- USP grid ---------- */
.usp-grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.usp-card{
  background: var(--paper);
  padding: 30px 26px;
}
.usp-card .num{
  font-family: var(--font-mono);
  color: var(--rust);
  font-size:13px;
  margin-bottom:14px;
  display:block;
}
.usp-card h3{ font-size:18px; margin-bottom:8px; }
.usp-card p{ color: var(--ink-soft); font-size: 14.5px; margin:0; }

/* ---------- material swatch cards ---------- */
.material-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.material-card{
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
  text-decoration:none;
  color: var(--ink);
  display:flex;
  flex-direction:column;
  transition: transform .15s ease, box-shadow .15s ease;
}
.material-card:hover{
  transform: translateY(-4px);
  box-shadow: 0 18px 34px -18px rgba(34,31,27,.35);
}
.swatch{
  height: 128px;
  position:relative;
  background-size: cover;
  background-position: center;
}
.swatch::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(34,31,27,0) 40%, rgba(34,31,27,.78) 100%);
}
.swatch .frac{
  position:absolute; left:12px; bottom:10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255,255,255,.92);
  text-shadow: 0 1px 3px rgba(0,0,0,.45);
}
.material-card .body{
  padding: 18px 18px 20px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.material-card h3{ font-size: 16.5px; margin-bottom:6px; }
.material-card .desc{ font-size:13.5px; color:var(--ink-soft); flex:1; margin-bottom:14px; }
.material-card .price-row{
  display:flex; justify-content:space-between; align-items:center;
  border-top:1px solid var(--line); padding-top:12px;
  font-family: var(--font-mono);
}
.material-card .price{ font-weight:700; font-size:15px; }
.material-card .arrow{ color: var(--rust); font-size:15px; }

/* ---------- testimonials ---------- */
.testi-grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 22px;
}
.testi-card{
  background: var(--paper);
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.testi-card p.quote{
  font-size: 15px;
  color: var(--ink);
  margin-bottom: 18px;
}
.testi-card .who{ display:flex; flex-direction:column; }
.testi-card .who b{ font-size:14px; }
.testi-card .who span{ font-family: var(--font-mono); font-size:12px; color:var(--ink-soft); }

/* ---------- stats ---------- */
.stats-row{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  border-top:1px solid var(--line-dark);
  border-bottom:1px solid var(--line-dark);
}
.stats-row .stat{
  padding: 26px 20px;
  border-right: 1px solid var(--line-dark);
}
.stats-row .stat:last-child{ border-right:none; }
.stats-row .stat b{
  display:block;
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--sand);
}
.stats-row .stat span{ font-size:13px; color:#B9B2A2; }

/* ---------- steps ---------- */
.steps{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap: 22px;
}
.step{ position:relative; padding-top: 8px; }
.step .step-num{
  font-family: var(--font-mono);
  font-size: 34px;
  color: var(--line-dark);
  -webkit-text-stroke: 1px var(--rust);
  color: transparent;
  display:block;
  margin-bottom: 10px;
}
.step h3{ font-size:16px; margin-bottom:6px; }
.step p{ font-size:14px; color:var(--ink-soft); margin:0; }

/* ---------- CTA banner ---------- */
.cta-banner{
  background: var(--rust);
  color:#fff;
  padding: 54px 0;
}
.cta-banner .container{
  display:flex; align-items:center; justify-content:space-between; gap: 24px; flex-wrap:wrap;
}
.cta-banner h2{ color:#fff; font-size: 26px; margin-bottom:6px; }
.cta-banner p{ color: rgba(255,255,255,.85); margin:0; }
.cta-banner .btn-dark{ background:#221F1B; }
.cta-banner .btn-outline{ border-color:#fff; color:#fff; }
.cta-banner .btn-outline:hover{ background:#fff; color: var(--rust); }

/* ---------- forms ---------- */
.form-card{
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
}
.form-row{ display:grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom:16px; }
.form-field label{
  display:block; font-family: var(--font-mono); font-size:12px; text-transform:uppercase; letter-spacing:.05em;
  color: var(--ink-soft); margin-bottom:6px;
}
.form-field input, .form-field select, .form-field textarea{
  width:100%;
  padding: 11px 13px;
  border:1px solid var(--line);
  background:#fff;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size:14.5px;
  color: var(--ink);
}
.form-field textarea{ resize:vertical; min-height:90px; }
.form-note{ font-size: 12.5px; color: var(--ink-soft); margin-top:12px; }

/* ---------- footer ---------- */
footer.site{
  background: var(--charcoal);
  color:#B9B2A2;
  padding: 56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--line-dark);
}
.footer-grid h4{
  color:#F2EDE1; font-size:13px; text-transform:uppercase; letter-spacing:.06em;
  font-family: var(--font-mono); font-weight:500; margin-bottom:16px;
}
.footer-grid a{ text-decoration:none; color:#B9B2A2; display:block; margin-bottom:9px; font-size:14px; }
.footer-grid a:hover{ color:#fff; }
.footer-grid p{ font-size:13.5px; color:#8f8878; }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center;
  padding: 20px 0; font-size:12.5px; color:#8f8878; flex-wrap:wrap; gap:10px;
  font-family: var(--font-mono);
}
.footer-bottom a{ color:#8f8878; text-decoration:none; }
.footer-bottom a:hover{ color:#fff; }

/* ---------- breadcrumbs ---------- */
.crumbs{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-soft);
  padding: 18px 0;
}
.crumbs a{ color: var(--ink-soft); text-decoration:none; }
.crumbs a:hover{ color: var(--rust); }

/* ---------- product page ---------- */
.product-hero{
  display:grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 50px;
  align-items:flex-start;
  padding: 20px 0 70px;
}
.product-sample{
  height: 380px;
  border-radius: var(--radius);
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow: 0 26px 50px -24px rgba(34,31,27,.35);
  background-size: cover;
  background-position: center;
}
.product-sample::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(34,31,27,0) 45%, rgba(34,31,27,.82) 100%);
}
.product-sample .label{
  position:absolute; left:20px; bottom:20px;
  color:#fff;
  text-shadow: 0 2px 6px rgba(0,0,0,.4);
}
.product-sample .label .mono{ font-size:12.5px; opacity:.85; }
.product-sample .label b{ font-size: 20px; display:block; }
.spec-table{
  width:100%;
  border-collapse: collapse;
  margin: 22px 0 28px;
}
.spec-table tr{ border-bottom: 1px solid var(--line); }
.spec-table td{ padding: 12px 0; font-size:14.5px; }
.spec-table td:first-child{
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size:13px;
  width: 220px;
}
.spec-table td:last-child{ font-weight:600; }
.apps-list{ list-style:none; margin:0; padding:0; display:grid; grid-template-columns:1fr 1fr; gap:10px 20px;}
.apps-list li{
  font-size:14.5px;
  padding-left: 20px;
  position:relative;
}
.apps-list li::before{
  content:"";
  position:absolute; left:0; top:8px;
  width:8px;height:8px;
  background: var(--rust);
  transform: rotate(45deg);
}
.note-box{
  background: var(--paper-2);
  border-left: 3px solid var(--sand);
  padding: 18px 22px;
  font-size: 14.5px;
  color: var(--ink-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-top: 24px;
}
.other-materials{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap: 18px;
}

/* ---------- misc content pages ---------- */
.two-col{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items:flex-start;
}
.check-list{ list-style:none; margin:0; padding:0; }
.check-list li{
  padding: 12px 0 12px 30px;
  border-bottom: 1px solid var(--line);
  position:relative;
  font-size: 15px;
}
.check-list li::before{
  content:"✓";
  position:absolute; left:0; top:11px;
  color: var(--rust);
  font-weight:700;
  font-family: var(--font-mono);
}
.info-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.info-card h3{ font-size:17px; }
.req-box{
  font-family: var(--font-mono);
  font-size: 13.5px;
  background: var(--charcoal);
  color:#C9C2B2;
  padding: 24px 26px;
  border-radius: var(--radius);
  line-height: 1.9;
}
.req-box b{ color:#fff; }

/* ---------- responsive ---------- */
@media (max-width: 980px){
  .hero .container{ grid-template-columns: 1fr; }
  .core-sample{ height: 280px; order:-1; }
  .usp-grid{ grid-template-columns: 1fr; }
  .material-grid{ grid-template-columns: repeat(2,1fr); }
  .testi-grid{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr 1fr; }
  .stats-row{ grid-template-columns: 1fr 1fr; }
  .stats-row .stat{ border-bottom: 1px solid var(--line-dark); }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .product-hero{ grid-template-columns: 1fr; }
  .two-col{ grid-template-columns: 1fr; }
  .other-materials{ grid-template-columns: repeat(2,1fr); }
  .form-row{ grid-template-columns: 1fr; }

  .topbar .tb-right{ gap:12px; }
  .mobile-toggle{ display:flex; }
  .phone-btn{ display:none; }
  .logo img{ height: 62px; }

  nav.primary{
    position:absolute;
    top: 100%;
    left:0; right:0;
    flex-direction:column;
    background: var(--charcoal);
    border-bottom: 1px solid var(--line-dark);
    box-shadow: 0 16px 24px -18px rgba(0,0,0,.6);
    max-height:0;
    overflow:hidden;
    transition: max-height .25s ease;
    gap:0;
  }
  header.site.nav-open nav.primary{ max-height: 420px; }
  nav.primary a{
    padding: 15px 28px;
    border-bottom: 1px solid var(--line-dark);
    border-bottom-color: rgba(216,207,184,.12);
  }
  nav.primary a:last-child{ border-bottom:none; }
}
@media (max-width: 600px){
  .container{ padding: 0 18px; }
  .material-grid{ grid-template-columns: 1fr; }
  .apps-list{ grid-template-columns: 1fr; }
  .other-materials{ grid-template-columns: 1fr; }
  .cta-banner .container{ flex-direction:column; align-items:flex-start; }
  section{ padding: 56px 0; }
  .core-sample{ height: 220px; }
  .product-sample{ height: 260px; }
  .hero{ padding: 52px 0 64px; }
  .logo img{ height: 46px; }
  .stats-row{ grid-template-columns: 1fr; }
  .stats-row .stat{ border-right:none; }
  .nav-cta{ gap:10px; }
}