/* =============================================================
   JSC «KNPZ» — Kamensky Oil Refinery
   Shared stylesheet
   ============================================================= */

:root{
  --ink:#081c3a;
  --steel:#0f2c58;
  --steel-light:#1c4176;
  --paper:#eef0ee;
  --paper-dim:#e3e6e2;
  --line:#c7cdc7;
  --muted:#7a8590;
  --hazard:#c8952c;
  --gold-deep:#9c7420;
  --white:#ffffff;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans', sans-serif;
  line-height:1.55;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:'Archivo Expanded', sans-serif;
  font-weight:700;
  letter-spacing:-0.01em;
  color:var(--ink);
  line-height:1.15;
}
a{color:inherit; text-decoration:none;}
img{max-width:100%; display:block;}
.wrap{max-width:1180px; margin:0 auto; padding:0 32px;}
.mono{font-family:'IBM Plex Mono', monospace;}

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

/* ---------- HEADER (two-tier: logo+switcher on top, nav below) ---------- */
header{
  position:fixed; top:0; left:0; right:0; z-index:100;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
header.scrolled{
  background:var(--white);
  border-bottom:3px solid var(--hazard);
  box-shadow:0 2px 24px rgba(0,0,0,0.06);
}

.nav-inner{
  max-width:1180px;
  margin:0 auto;
  padding:8px 32px 12px;
  display:flex;
  flex-direction:column;
  gap:6px;
}

/* Row 1: logo | switcher (+ mobile toggle) */
.nav-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  cursor:pointer;
  flex:0 0 auto;
}
.brand-logo{
  height:56px;
  width:auto;
  filter:brightness(0) invert(1);
  transition:filter .25s ease;
}
header.scrolled .brand-logo{filter:none;}

/* Row 2: navigation */
nav{
  width:100%;
}
nav ul{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:24px;
  list-style:none;
}
nav a{
  color:var(--white);
  font-size:0.84rem;
  font-weight:500;
  padding:5px 2px;
  border-bottom:2px solid transparent;
  transition:color .15s, border-color .15s;
  cursor:pointer;
  white-space:nowrap;
}
header.scrolled nav a{color:var(--ink);}
nav a:hover, nav a:focus-visible, nav a.active{
  color:var(--hazard);
  border-bottom-color:var(--hazard);
}
header.scrolled nav a:hover,
header.scrolled nav a:focus-visible,
header.scrolled nav a.active{
  color:var(--gold-deep);
}

/* Russian labels are a touch longer — slightly tighter gaps */
html[lang="ru"] nav ul{gap:18px;}
html[lang="ru"] nav a{font-size:0.82rem;}

/* Language switcher */
.lang-switch{
  display:flex;
  gap:4px;
  font-size:0.72rem;
  font-weight:700;
  color:var(--white);
  background:rgba(255,255,255,0.12);
  padding:4px 6px;
  border-radius:40px;
  backdrop-filter:blur(8px);
  transition:background .25s, color .25s;
  flex:0 0 auto;
}
header.scrolled .lang-switch{
  color:var(--muted);
  background:var(--paper-dim);
  backdrop-filter:none;
}
.lang-switch span,
.lang-switch a{
  cursor:pointer;
  padding:3px 11px;
  border-radius:40px;
  transition:.2s;
  color:inherit;
  text-decoration:none;
}
.lang-switch span:hover,
.lang-switch a:hover{color:var(--hazard);}
.lang-switch .active-lang{background:var(--hazard); color:var(--white);}
header.scrolled .lang-switch .active-lang{background:var(--ink);}

/* Mobile nav toggle (hidden on desktop) */
.nav-toggle{
  display:none;
  background:transparent;
  border:0;
  color:var(--white);
  font-size:1.4rem;
  cursor:pointer;
  padding:6px 10px;
  transition:color .25s;
  flex:0 0 auto;
}
header.scrolled .nav-toggle{color:var(--ink);}

/* ---------- HERO (uniform across all pages) ---------- */
.hero{
  position:relative;
  color:var(--white);
  padding:180px 0 60px;
  overflow:hidden;
  min-height:100svh;
  display:flex;
  align-items:stretch;
}
@supports not (min-height: 100svh){
  .hero{ min-height:100vh; }
}
.hero-photo{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  z-index:0;
  filter:saturate(1.05) brightness(0.85);
}
.hero-scrim{
  position:absolute; inset:0; z-index:1;
  background:linear-gradient(100deg,
    rgba(8,28,58,0.78) 0%,
    rgba(8,28,58,0.55) 40%,
    rgba(8,28,58,0.25) 70%,
    rgba(8,28,58,0.05) 100%);
}
.hero-inner{
  position:relative; z-index:2;
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:40px;
  align-items:stretch;
  max-width:1180px;
  margin:0 auto;
  padding:0 32px;
  width:100%;
  min-height:calc(100svh - 180px - 60px);
}

/* Left column (eyebrow, h1, paragraph, CTAs) pinned to top */
.hero-inner > div:first-child{
  align-self:start;
}

/* Right column (stats) pinned to bottom */
.hero-inner > div:last-child{
  align-self:end;
}

.hero-eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.82rem; color:var(--hazard);
  margin-bottom:16px; letter-spacing:0.06em;
}
.hero h1{
  color:var(--white);
  font-size:clamp(2rem, 3.6vw, 3rem);
  line-height:1.08;
  max-width:16ch;
  margin-bottom:18px;
  text-shadow:0 2px 24px rgba(0,0,0,0.4);
}
.hero h1 span{color:var(--hazard);}
.hero p{
  color:#e0e6ea; max-width:50ch;
  font-size:1rem;
  margin-bottom:22px;
  text-shadow:0 1px 12px rgba(0,0,0,0.4);
}
.hero-stats{display:flex; gap:30px; padding-top:0; flex-wrap:wrap;}
.hero-stats div{border-left:2px solid var(--hazard); padding-left:14px;}
.hero-stats strong{
  display:block; font-family:'Archivo Expanded', sans-serif;
  font-size:1.4rem; color:var(--white); line-height:1.1;
}
.hero-stats span{font-size:0.76rem; color:#c8d3de;}
.cta-row{display:flex; gap:14px; flex-wrap:wrap; position:relative; z-index:3;}
.btn{
  display:inline-block; padding:13px 24px;
  font-weight:600; font-size:0.92rem;
  border:2px solid var(--white); color:var(--white);
  transition:background .15s, color .15s; cursor:pointer;
  background:transparent; font-family:inherit;
}
.btn:hover, .btn:focus-visible{background:var(--white); color:var(--ink);}
.btn-solid{
  background:var(--hazard); border-color:var(--hazard); color:var(--white);
}
.btn-solid:hover, .btn-solid:focus-visible{
  background:var(--gold-deep); border-color:var(--gold-deep); color:var(--white);
}
.btn-sm{padding:10px 20px; font-size:0.85rem;}

/* pipe schematic */
.schematic{padding-bottom:0; position:relative; z-index:2; width:100%;}
.schematic svg{width:100%; height:auto; display:block;}

/* ---------- SECTION SHELLS ---------- */
section{padding:88px 0;}
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end;
  gap:24px; margin-bottom:48px;
  border-bottom:1px solid var(--line);
  padding-bottom:22px; flex-wrap:wrap;
}
.section-head h2{font-size:clamp(1.6rem, 2.6vw, 2.2rem);}
.section-num{
  font-family:'IBM Plex Mono', monospace;
  color:var(--muted); font-size:0.85rem;
}

/* ---------- ABOUT ---------- */
.about{background:var(--paper);}
.about-grid{
  display:grid; grid-template-columns:1fr 1fr;
  gap:56px; align-items:start;
}
.about-copy p{max-width:54ch; margin-bottom:16px; color:#333;}
.about-copy p:last-child{margin-bottom:0;}
.about-copy strong{color:var(--ink);}

/* feature photo band */
.photo-band{
  margin:0 auto 48px;
  max-width:1180px;
  border:1px solid var(--steel-light);
  overflow:hidden;
  background:var(--steel);
}
.photo-band img{width:100%; height:340px; object-fit:cover; display:block;}
.photo-band figcaption{
  padding:12px 18px;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem; color:#9db4d6;
  background:var(--steel);
  border-top:1px solid var(--steel-light);
}

/* site plan svg */
.site-plan{
  margin-bottom:48px;
  border:1px solid var(--steel-light);
  background:var(--steel);
  overflow:hidden;
}
.site-plan svg{width:100%; height:auto; display:block;}

/* nameplate */
.nameplate{
  background:var(--steel); color:var(--white);
  padding:0; border:1px solid #06152e;
  position:relative;
}
.nameplate::before{
  content:""; position:absolute; inset:8px;
  border:1px dashed rgba(255,255,255,0.25);
  pointer-events:none;
}
.nameplate-head{
  padding:22px 26px 18px;
  border-bottom:1px solid rgba(255,255,255,0.18);
}
.nameplate-head .tag{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem; letter-spacing:0.04em;
  color:var(--hazard);
}
.nameplate-head h3{color:var(--white); font-size:1.2rem; margin-top:6px;}
.nameplate dl{padding:18px 26px 26px;}
.nameplate .row{
  display:grid; grid-template-columns:40% 60%;
  gap:10px; padding:11px 0;
  border-bottom:1px solid rgba(255,255,255,0.1);
}
.nameplate .row:last-child{border-bottom:none;}
.nameplate dt{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.78rem; color:#a9bfda;
}
.nameplate dd{font-size:0.9rem; color:var(--white);}

/* ---------- PRODUCTION (dark) ---------- */
.production{background:var(--ink); color:var(--white);}
.production .section-head{border-bottom-color:#1c4176;}
.production .section-num{color:#9db4d6;}
.prod-grid{
  display:grid; grid-template-columns:repeat(3, 1fr);
  gap:1px; background:#1c4176; border:1px solid #1c4176;
}
.prod-card{background:var(--ink); padding:30px 26px;}
.prod-card .idx{
  font-family:'IBM Plex Mono', monospace;
  color:var(--hazard); font-size:0.82rem;
}
.prod-card .icon{
  width:42px; height:42px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:14px; color:var(--hazard);
}
.prod-card .icon svg{width:38px; height:38px; display:block;}
.prod-card h3{
  color:var(--white); font-size:1.1rem;
  margin:12px 0 10px;
}
.prod-card p{color:#c2cee2; font-size:0.9rem;}
.prod-card .spec{
  margin-top:16px; padding-top:14px;
  border-top:1px solid #1c4176;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.76rem; color:#9db4d6;
}

/* ---------- PROCESS STRIP ---------- */
.process{background:var(--paper-dim);}
.process-list{
  display:grid; grid-template-columns:repeat(5, 1fr);
  gap:0; position:relative;
}
.process-list::before{
  content:""; position:absolute;
  top:11px; left:0; right:0; height:2px;
  background:var(--line);
}
.p-step{position:relative; padding-top:34px; padding-right:18px;}
.p-step::before{
  content:""; position:absolute;
  top:0; left:0; width:24px; height:24px;
  border-radius:50%; background:var(--paper-dim);
  border:2px solid var(--steel);
}
.p-step h4{
  font-family:'Archivo', sans-serif;
  font-size:0.98rem; margin-bottom:8px;
}
.p-step p{font-size:0.85rem; color:var(--muted);}

/* ---------- COMPLIANCE / HSE / ENV / GOV / SOCIAL ---------- */
.compliance{background:var(--paper);}
.compliance.alt{background:var(--paper-dim);}
.comp-grid{
  display:grid; grid-template-columns:repeat(3, 1fr);
  gap:32px 28px;
}
.comp-item{border-top:3px solid var(--steel); padding-top:18px;}
.comp-item .badge{
  display:inline-block;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem; color:var(--hazard);
  letter-spacing:0.06em; margin-bottom:10px;
}
.comp-item h4{font-size:1.02rem; margin-bottom:10px;}
.comp-item p{font-size:0.88rem; color:#3a5473; margin-bottom:12px;}
.comp-item ul{list-style:none;}
.comp-item ul li{
  font-size:0.84rem; color:var(--muted);
  padding:5px 0 5px 20px; position:relative; line-height:1.6;
}
.comp-item ul li::before{
  content:"▸"; position:absolute; left:0;
  color:var(--hazard); font-weight:700;
}

/* ---------- CALLOUT ---------- */
.callout{
  background:var(--steel); color:var(--white);
  padding:44px 42px; position:relative;
  overflow:hidden; border-left:4px solid var(--hazard);
  margin-bottom:52px;
}
.callout::before{
  content:'"'; position:absolute;
  top:-30px; right:24px; font-size:11rem;
  color:rgba(200,149,44,0.12);
  font-family:Georgia, serif; line-height:1;
}
.callout blockquote{
  font-size:1.2rem; line-height:1.65;
  font-weight:400; max-width:64ch;
  position:relative; z-index:1;
  font-family:'Archivo', sans-serif;
  letter-spacing:-0.2px;
}
.callout cite{
  display:block; margin-top:18px;
  font-size:0.85rem; color:var(--hazard);
  font-style:normal; font-weight:600; letter-spacing:0.4px;
}

/* ---------- LOGISTICS (log-item) ---------- */
.logistics{background:var(--paper-dim);}
.log-grid{
  display:grid; grid-template-columns:repeat(4, 1fr);
  gap:1px; background:var(--line);
  border:1px solid var(--line);
}
.log-item{background:var(--white); padding:28px 24px;}
.log-item .icon{
  width:52px; height:52px;
  background:var(--ink); color:var(--hazard);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px;
}
.log-item .icon svg{
  width:32px; height:32px;
  display:block;
}
.log-item h4{font-size:1rem; margin-bottom:10px;}
.log-item p{font-size:0.88rem; color:#3a5473;}

/* ---------- STAT STRIP ---------- */
.stat-strip{
  background:var(--steel); padding:40px 0;
  border-top:1px solid #06152e;
  border-bottom:1px solid #06152e;
}
.stat-strip-inner{
  display:grid; grid-template-columns:repeat(4, 1fr);
  gap:0; max-width:1180px; margin:0 auto; padding:0 32px;
}
.stat-item{
  text-align:left; padding:0 24px;
  border-right:1px solid rgba(255,255,255,0.12);
}
.stat-item:first-child{padding-left:0;}
.stat-item:last-child{border-right:none;}
.stat-item strong{
  display:block; font-family:'Archivo Expanded', sans-serif;
  font-size:2rem; color:var(--hazard);
  font-weight:700; line-height:1; margin-bottom:8px;
}
.stat-item span{
  font-size:0.78rem; color:#a8bdd4;
  text-transform:uppercase; letter-spacing:0.08em;
}

/* ---------- CONTACT ---------- */
.contact{background:var(--steel); color:var(--white);}
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:56px;}
.contact h2{color:var(--white);}
.contact-copy p{color:#d7e0ec; max-width:44ch; margin-bottom:22px;}
.contact-list{list-style:none;}
.contact-list li{
  display:grid; grid-template-columns:130px 1fr;
  gap:14px; padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,0.15);
  font-size:0.94rem;
}
.contact-list li:first-child{padding-top:0;}
.contact-list .k{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.78rem; color:#bcd0ea; align-self:start;
}
.map-block{
  background:var(--ink); border:1px solid #06152e;
  padding:24px;
}
.map-block .tag{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem; color:var(--hazard);
  margin-bottom:10px; display:block;
  letter-spacing:0.06em;
}
.map-svg{border:1px solid #1c4176; margin-top:12px;}

/* ---------- FOOTER ---------- */
footer{
  background:var(--ink); color:#9db4d6;
  padding:36px 0; border-top:1px solid #0f2c58;
}
.footer-inner{
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap:wrap; gap:12px; font-size:0.82rem;
}
.footer-inner .mono{color:#597099;}

/* ---------- BACK TO TOP ---------- */
.back-to-top{
  position:fixed; right:24px; bottom:24px;
  width:44px; height:44px;
  background:var(--hazard); color:var(--white);
  border:0; cursor:pointer;
  font-size:1.1rem; font-weight:700;
  display:none; align-items:center; justify-content:center;
  z-index:60;
  transition:background .2s, transform .2s;
}
.back-to-top:hover{background:var(--gold-deep); transform:translateY(-2px);}
.back-to-top.visible{display:flex;}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px){
  .prod-grid{grid-template-columns:repeat(2, 1fr);}
  .log-grid{grid-template-columns:repeat(2, 1fr);}
  .comp-grid{grid-template-columns:repeat(2, 1fr);}
  .stat-strip-inner{grid-template-columns:repeat(2, 1fr); gap:24px 0;}
  .stat-item:nth-child(2){border-right:none;}
  .stat-item{padding:12px 0;}
  .stat-item:first-child{padding-left:24px;}
}

@media (max-width: 900px){
  .hero{
    padding:140px 0 50px;
    min-height:100svh;
  }
  .hero-inner{
    grid-template-columns:1fr;
    min-height:auto;
  }
  .hero-inner > div:first-child,
  .hero-inner > div:last-child{
    align-self:auto;
  }
  .about-grid, .contact-grid{grid-template-columns:1fr;}
  .prod-grid{grid-template-columns:1fr;}
  .process-list{grid-template-columns:1fr 1fr;}
  .process-list::before{display:none;}

  /* Mobile: nav collapses to a dropdown inside the header */
  nav ul{
    display:none;
    flex-direction:column;
    gap:12px;
    padding-top:16px;
    border-top:1px solid var(--line);
    margin-top:6px;
  }
  nav ul.open{display:flex;}
  nav a{color:var(--white);}
  header.scrolled nav a{color:var(--ink);}

  .nav-toggle{display:block;}
  .photo-band img{height:240px;}
}

@media (max-width: 560px){
  .comp-grid, .log-grid{grid-template-columns:1fr;}
  .stat-strip-inner{grid-template-columns:1fr; gap:20px 0;}
  .stat-item{border-right:none; padding:0;}
  .stat-item:first-child{padding-left:0;}
  .hero-stats{row-gap:16px;}
  .contact-list li, .nameplate .row{grid-template-columns:1fr;}
  .wrap{padding:0 20px;}
  .brand-logo{height:36px;}
}