/* ============================================================
   PetroMetz Pipes and Fittings Trading L.L.C
   "Forged Blueprint" design system
   Typeface: Calibri (Carlito as the metric-compatible web fallback)
   No inline styles anywhere — the site runs under a strict CSP.
   ============================================================ */

:root{
  --ink:        #0A1622;
  --ink-2:      #0E1F30;
  --ink-3:      #13293D;
  --line-dark:  #1E3A52;
  --arc:        #38B6FF;
  --arc-2:      #7ED2FF;
  --arc-soft:   rgba(56,182,255,.14);
  --amber:      #F59E2B;
  --amber-deep: #D97F0E;
  --paper:      #F2F5F8;
  --paper-2:    #E9EFF4;
  --card:       #FFFFFF;
  --line-light: #DCE5EC;
  --slate:      #4E6377;
  --mist:       #9FB4C6;
  --white:      #FFFFFF;

  /* Calibri throughout. Windows has it natively; Carlito is a
     metric-compatible open substitute shipped in css/fonts/ so the
     layout is identical everywhere. */
  --font-display:Calibri, Carlito, Candara, 'Segoe UI', system-ui, sans-serif;
  --font-body:  Calibri, Carlito, Candara, 'Segoe UI', system-ui, sans-serif;
  --font-mono:  Calibri, Carlito, Candara, 'Segoe UI', system-ui, sans-serif;

  --nav-h: 78px;
  --wrap: 1180px;
  --gut: 24px;
  --r: 14px;
  --shadow: 0 18px 50px -18px rgba(10,22,34,.28);
  --shadow-lg: 0 30px 70px -26px rgba(10,22,34,.42);
  --ease: cubic-bezier(.22,.9,.28,1);
}

*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-padding-top:calc(var(--nav-h) + 16px);
}

body{
  font-family:var(--font-body);
  color:var(--slate);
  background:var(--paper);
  line-height:1.6;
  font-size:17.5px;
  overflow-x:hidden;
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:rgba(56,182,255,.18);
}

img,svg,canvas,video{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
button{ font:inherit; background:none; border:0; cursor:pointer; color:inherit; }
::selection{ background:var(--arc); color:var(--ink); }

h1,h2,h3{
  font-family:var(--font-display);
  font-weight:700;
  color:var(--ink);
  line-height:1.08;
  text-transform:uppercase;
  letter-spacing:-.005em;
  overflow-wrap:break-word;
}

/* ---------- accessibility ---------- */
.skip{
  position:absolute; left:-9999px; top:0; z-index:2000;
  background:var(--amber); color:#181004; padding:14px 22px; border-radius:0 0 10px 0;
  font-family:var(--font-mono); font-size:.78rem; letter-spacing:.14em; text-transform:uppercase;
}
.skip:focus{ left:0; }

:focus-visible{
  outline:2px solid var(--arc);
  outline-offset:3px;
  border-radius:4px;
}

/* ---------- shared GL canvas (single WebGL context, scissored) ---------- */
#gl{
  position:fixed; inset:0; width:100%; height:100%;
  pointer-events:none; z-index:60;
}

/* ---------- scroll progress ---------- */
.progress{
  position:fixed; top:0; left:0; height:3px; width:0;
  background:linear-gradient(90deg,var(--arc),var(--amber));
  z-index:1200;
  will-change:width;
}

/* scroll lock while the mobile menu is open. `position:fixed` rather
   than `overflow:hidden` because iOS Safari ignores the latter and
   lets the page scroll behind the overlay. main.js stores the offset
   in `top` and restores it on close. */
body.nav-open{
  position:fixed; left:0; right:0; width:100%; overflow:hidden;
}

/* ---------- nav ---------- */
.nav{
  /* above the mobile overlay (1100) so the logo and burger stay visible */
  position:fixed; top:0; left:0; right:0; z-index:1150;
  height:var(--nav-h);
  transition:background .35s var(--ease), border-color .35s var(--ease), box-shadow .35s;
  border-bottom:1px solid transparent;
  padding-top:env(safe-area-inset-top);
}
.nav.menu-open{
  background:rgba(9,19,30,.98);
  -webkit-backdrop-filter:blur(18px); backdrop-filter:blur(18px);
  border-bottom-color:var(--line-dark);
}
.nav.scrolled{
  background:rgba(10,22,34,.88);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
          backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line-dark);
  box-shadow:0 10px 30px -18px rgba(0,0,0,.6);
}
.nav-inner{
  max-width:var(--wrap); height:100%; margin:0 auto;
  padding:0 max(var(--gut), env(safe-area-inset-left)) 0 max(var(--gut), env(safe-area-inset-right));
  display:flex; align-items:center; justify-content:space-between; gap:16px;
}
/* the mobile overlay is a child of .nav, so raising .nav alone doesn't keep
   the logo on top — the brand needs its own layer inside that context */
.brand{ display:flex; align-items:center; gap:12px; min-width:0; position:relative; z-index:1102; min-height:44px; }
.brand-text{ min-width:0; }
.brand-name{
  display:block;
  font-family:var(--font-display); font-weight:700; font-size:1.78rem; letter-spacing:.03em;
  color:var(--white); text-transform:uppercase; line-height:1; white-space:nowrap;
}
.brand-name b{ color:var(--arc); font-weight:800; }
.brand-text small{
  display:block; font-family:var(--font-mono); font-size:.72rem; font-weight:400;
  letter-spacing:.11em; color:var(--mist); margin-top:4px; text-transform:uppercase;
  white-space:nowrap;
}

.nav-links{ display:flex; align-items:center; gap:6px; }
.nav-links a:not(.nav-cta){
  font-family:var(--font-mono); font-size:.88rem; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  color:var(--mist); padding:10px 13px; border-radius:8px; position:relative;
  transition:color .25s;
}
.nav-links a:not(.nav-cta):hover{ color:var(--white); }
.nav-links a.active{ color:var(--arc); }
.nav-links a.active::after{
  content:""; position:absolute; left:13px; right:13px; bottom:4px; height:2px; background:var(--arc);
}
.nav-cta{ margin-left:10px; }

.nav-burger{
  display:none; flex-direction:column; gap:5px;
  width:44px; height:44px; align-items:center; justify-content:center;
  position:relative; z-index:1102; border-radius:10px;
}
.nav-burger span{
  width:24px; height:2px; background:var(--white); border-radius:2px;
  transition:transform .3s var(--ease), opacity .3s;
}
.nav-burger.open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2){ opacity:0; }
.nav-burger.open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  font-family:var(--font-mono); font-size:.85rem; font-weight:700;
  letter-spacing:.08em; text-transform:uppercase;
  padding:15px 26px; border-radius:10px; min-height:48px;
  transition:transform .25s var(--ease), box-shadow .25s, background .25s, color .25s, border-color .25s;
  text-align:center;
}
.btn svg{ width:15px; height:15px; flex:0 0 auto; }
.btn-solid{
  background:linear-gradient(135deg,var(--amber),var(--amber-deep));
  color:#181004; box-shadow:0 12px 30px -12px rgba(245,158,43,.55);
}
.btn-solid:hover{ transform:translateY(-2px); box-shadow:0 18px 36px -12px rgba(245,158,43,.65); }
.btn-ghost{
  border:1px solid var(--line-dark); color:var(--white); background:rgba(56,182,255,.06);
}
.btn-ghost:hover{ border-color:var(--arc); color:var(--arc); transform:translateY(-2px); }

/* ---------- section shells ---------- */
.section{ padding:104px 0; position:relative; }
.section-tight{ padding:72px 0; }
.section-flush-top{ padding-top:0; }
.wrap{
  max-width:var(--wrap); margin:0 auto;
  padding-inline:max(var(--gut), env(safe-area-inset-left));
}
.wrap-center{ text-align:center; }
.pad-top{ padding-top:64px; }

.dark{
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(56,182,255,.10), transparent 60%),
    var(--ink);
  color:var(--mist);
}
.dark h1,.dark h2,.dark h3{ color:var(--white); }
.tint{ background:var(--paper-2); }

.blueprint{ position:relative; }
.blueprint::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:
    linear-gradient(rgba(56,182,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,182,255,.05) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(80% 80% at 50% 40%, #000 30%, transparent 100%);
          mask-image:radial-gradient(80% 80% at 50% 40%, #000 30%, transparent 100%);
}
.blueprint > *{ position:relative; }

/* eyebrow + headings */
.eyebrow{
  display:inline-flex; align-items:center; gap:12px;
  font-family:var(--font-mono); font-size:.78rem; font-weight:700;
  letter-spacing:.18em; text-transform:uppercase; color:var(--arc);
  margin-bottom:18px;
}
.eyebrow::before{ content:""; width:34px; height:1px; background:var(--arc); flex:0 0 auto; }
.sec-head{ max-width:760px; margin-bottom:56px; }
.sec-head h2{ font-size:clamp(1.8rem, 3.4vw, 2.6rem); font-weight:700; }
.sec-head h2.h2-sm{ font-size:clamp(1.5rem, 2.6vw, 1.95rem); }
.sec-head p{ margin-top:16px; font-size:1.05rem; }
.sec-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.sec-head.center .eyebrow{ justify-content:center; }
.sec-head.center .eyebrow::before{ display:none; }
.sec-head.slim{ margin-bottom:28px; }

/* ---------- hero (home) ---------- */
.hero{
  min-height:100svh; display:flex; flex-direction:column; justify-content:center;
  padding:calc(var(--nav-h) + 48px) 0 0;
  overflow:hidden;
}
/* Photographic backdrops. Images are public-domain / CC0 and self-hosted,
   so `img-src 'self'` still holds. The photo is the *bottom* layer — the
   gradients above it keep text contrast and the brand palette on top.
   --bg-photo lets the media query swap in the smaller file without having
   to restate every background layer. */
.hero.dark{
  --bg-photo:url(../img/refinery-hero.jpg);
  background:
    /* weighted left-to-right: dense behind the headline, opening up over
       the plant on the right so the refinery is actually legible */
    linear-gradient(96deg, rgba(10,22,34,.94) 0%, rgba(10,22,34,.78) 44%, rgba(10,22,34,.46) 100%),
    linear-gradient(180deg, rgba(10,22,34,.42) 0%, rgba(10,22,34,.10) 40%, rgba(10,22,34,.86) 100%),
    radial-gradient(1000px 500px at 85% -10%, rgba(56,182,255,.12), transparent 60%),
    var(--bg-photo) center bottom / cover no-repeat,
    var(--ink);
}
.detail-hero.dark,.legal-hero.dark{
  --bg-photo:url(../img/refinery-cta.jpg);
  background:
    linear-gradient(180deg, rgba(10,22,34,.78) 0%, rgba(10,22,34,.88) 100%),
    radial-gradient(1000px 500px at 85% -10%, rgba(56,182,255,.10), transparent 60%),
    var(--bg-photo) center / cover no-repeat,
    var(--ink);
}
.hero-grid{
  display:grid; grid-template-columns:1.05fr .95fr; gap:36px; align-items:center;
}
.hero h1{
  font-size:clamp(2.1rem, 4.6vw, 3.65rem); font-weight:700; letter-spacing:-.01em;
  line-height:1.06;
}
.hero h1 .accent{ color:var(--arc); }
.hero-sub{ margin:22px 0 34px; font-size:1.06rem; max-width:620px; color:var(--mist); }
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; }
.hero-meta{
  margin-top:40px; display:flex; gap:28px; flex-wrap:wrap;
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.18em; text-transform:uppercase; color:var(--mist);
}
.hero-meta span{ display:flex; align-items:center; gap:8px; }
.hero-meta i{ width:6px; height:6px; border-radius:50%; background:var(--amber); flex:0 0 auto; }

/* ---------- 3D stages ---------- */
.model-stage{
  position:relative; width:100%;
  touch-action:pan-y;
}
.model-stage::before{
  content:""; position:absolute; inset:6%;
  background:radial-gradient(closest-side, rgba(56,182,255,.16), transparent 72%);
  pointer-events:none;
}
.model-stage.grab{ cursor:grab; }
.model-stage.grab:active,.model-stage.dragging{ cursor:grabbing; }

.hero-stage{ aspect-ratio:1/1; max-height:620px; }
.hero-stage::after{
  content:""; position:absolute; inset:8%;
  border:1px dashed rgba(56,182,255,.25); border-radius:50%;
  animation:spin 40s linear infinite; pointer-events:none;
}
@keyframes spin{ to{ transform:rotate(360deg); } }

.detail-stage{ aspect-ratio:1/1; max-height:480px; }
.split .model-stage{ aspect-ratio:1/1; }
.cat-card .cat-stage{ aspect-ratio:16/10; margin:-4px -6px 10px; }

/* rotation affordance */
.stage-hint{
  position:absolute; left:50%; bottom:8px; transform:translateX(-50%);
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.16em; text-transform:uppercase;
  color:var(--mist); opacity:.6; pointer-events:none; white-space:nowrap;
  transition:opacity .4s;
}
.model-stage.dragging .stage-hint{ opacity:0; }

/* ---------- marquee ---------- */
.marquee{
  border-top:1px solid var(--line-dark); border-bottom:1px solid var(--line-dark);
  background:var(--ink-2); overflow:hidden; padding:16px 0; margin-top:64px;
}
.marquee-track{ display:flex; width:max-content; animation:marquee 34s linear infinite; }
.marquee span{
  font-family:var(--font-display); font-weight:700; font-size:1.15rem; letter-spacing:.14em;
  text-transform:uppercase; color:var(--mist); padding:0 22px; white-space:nowrap;
  display:flex; align-items:center; gap:22px;
}
.marquee b{ color:var(--amber); font-weight:700; }
@keyframes marquee{ to{ transform:translateX(-50%); } }

/* ---------- category cards ---------- */
.cat-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.cat-card{
  position:relative; background:var(--card); border:1px solid var(--line-light); border-radius:var(--r);
  padding:26px 26px 22px; overflow:hidden;
  display:flex; flex-direction:column;
  transition:transform .35s var(--ease), box-shadow .35s, border-color .35s;
}
.cat-card::after{
  content:""; position:absolute; inset:0; border-radius:var(--r); pointer-events:none;
  background:linear-gradient(160deg, rgba(56,182,255,.10), transparent 45%);
  opacity:0; transition:opacity .35s;
}
.cat-card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-lg); border-color:rgba(56,182,255,.5); }
.cat-card:hover::after{ opacity:1; }
.cat-body{ position:relative; z-index:1; }
.cat-card h3{ font-size:1.22rem; font-weight:700; }
.cat-link{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.2em; text-transform:uppercase;
  color:var(--ink); display:inline-flex; align-items:center; gap:8px; margin-top:14px;
}
.cat-link svg{ width:14px; height:14px; transition:transform .3s var(--ease); }
.cat-card:hover .cat-link{ color:var(--arc); }
.cat-card:hover .cat-link svg{ transform:translateX(5px); }

/* ---------- feature strip ---------- */
.feat-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.feat-grid.cols-3{ grid-template-columns:repeat(3,1fr); }
.feat{
  background:var(--card); border:1px solid var(--line-light); border-radius:var(--r);
  padding:26px 24px;
  transition:transform .35s var(--ease), box-shadow .35s;
}
.feat:hover{ transform:translateY(-5px); box-shadow:var(--shadow); }
.feat .ic{
  width:46px; height:46px; border-radius:12px; display:grid; place-items:center;
  background:var(--arc-soft); color:var(--arc); margin-bottom:16px;
}
.feat .ic svg{ width:22px; height:22px; }
.feat h3{ font-size:1.2rem; font-weight:700; letter-spacing:.04em; }
.feat p{ font-size:.88rem; margin-top:6px; }

/* ---------- CTA band ---------- */
.cta-band{
  position:relative; overflow:hidden; text-align:center;
  --bg-photo:url(../img/refinery-cta.jpg);
  background:
    linear-gradient(rgba(10,22,34,.74), rgba(10,22,34,.86)),
    radial-gradient(700px 340px at 50% 120%, rgba(245,158,43,.20), transparent 65%),
    var(--bg-photo) center / cover no-repeat,
    linear-gradient(135deg, #0C2236, var(--ink));
}
.cta-band h2{ font-size:clamp(1.75rem, 3.4vw, 2.5rem); font-weight:700; color:var(--white); }
.cta-band p{ max-width:620px; margin:16px auto 30px; color:var(--mist); }
.cta-band .hero-ctas{ justify-content:center; }

/* ---------- stats ---------- */
.stat-row{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:56px; }
.stat{
  border:1px solid var(--line-light); border-radius:var(--r); background:var(--card);
  padding:26px 24px; text-align:center;
}
.stat b{
  font-family:var(--font-display); font-weight:800; font-size:clamp(2.6rem,6vw,3.2rem);
  color:var(--arc); line-height:1; display:block;
}
.stat span{
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.22em; text-transform:uppercase;
  color:var(--slate); display:block; margin-top:10px;
}

/* ---------- about ---------- */
.split{ display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
.prose{ max-width:900px; }
.prose p + p{ margin-top:16px; }
.prose p{ font-size:1rem; }
.story-h2{ font-size:clamp(1.7rem,3.2vw,2.3rem); }
.story-p{ margin-top:18px; }

.facility{
  position:relative; border:1px solid var(--line-light); border-radius:var(--r);
  background:linear-gradient(180deg, var(--ink-2), var(--ink-3));
  overflow:hidden;
}
.facility .model-stage{ aspect-ratio:4/3; }
.facility-cap{
  padding:18px 22px 20px; border-top:1px solid var(--line-dark);
}
.facility-cap h3{ color:var(--white); font-size:1.3rem; font-weight:700; letter-spacing:.06em; }
.facility-cap p{ color:var(--mist); font-size:.88rem; margin-top:4px; }

.value-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.value{
  background:var(--card); border:1px solid var(--line-light); border-radius:var(--r); padding:26px 24px;
  border-top:3px solid var(--arc);
  transition:transform .35s var(--ease), box-shadow .35s;
}
.value:nth-child(even){ border-top-color:var(--amber); }
.value:hover{ transform:translateY(-5px); box-shadow:var(--shadow); }
.value h3{ font-size:1.25rem; font-weight:700; }
.value p{ font-size:.88rem; margin-top:8px; }
.value .ic{
  width:44px; height:44px; border-radius:12px; display:grid; place-items:center;
  background:var(--arc-soft); color:var(--arc); margin-bottom:14px;
}
.value:nth-child(even) .ic{ background:rgba(245,158,43,.12); color:var(--amber); }
.value .ic svg{ width:20px; height:20px; }

/* ---------- contact ---------- */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:24px; align-items:start; }
.panel{
  background:var(--card); border:1px solid var(--line-light); border-radius:var(--r); padding:32px;
}
.panel h3{ font-size:1.6rem; font-weight:700; margin-bottom:20px; }
.info-item{
  display:flex; gap:16px; padding:18px 0; border-bottom:1px solid var(--line-light);
}
.info-item:last-child{ border-bottom:0; }
.info-item .ic{
  flex:0 0 auto; width:44px; height:44px; border-radius:50%;
  display:grid; place-items:center; background:var(--arc-soft); color:var(--arc);
}
.info-item .ic svg{ width:19px; height:19px; }
.info-item h4{
  font-family:var(--font-display); text-transform:uppercase; letter-spacing:.05em;
  color:var(--ink); font-size:1.05rem;
}
.info-item p{ font-size:.9rem; margin-top:3px; }
.info-item a{ color:var(--slate); border-bottom:1px solid transparent; }
.info-item a:hover{ color:var(--arc); border-bottom-color:var(--arc); }

.privacy-note{
  margin-top:22px; padding:18px 20px; border-radius:12px;
  background:var(--arc-soft); border:1px solid rgba(56,182,255,.28);
  font-size:.88rem; color:var(--slate);
}
.privacy-note strong{ color:var(--ink); }
.privacy-note a{ color:#1E7FBE; border-bottom:1px solid currentColor; }

.location-card{
  border:1px solid var(--line-light); border-radius:var(--r); background:var(--card);
  box-shadow:var(--shadow); padding:32px; display:grid; gap:20px;
  grid-template-columns:1fr auto; align-items:center;
}
.location-card address,.panel address{ font-style:normal; font-size:1rem; line-height:1.8; color:var(--slate); }
.loc-label{
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.24em; text-transform:uppercase;
  color:var(--arc); display:block; margin-bottom:8px;
}
.ext-wrap{ margin-top:18px; }
.ext-link{
  display:inline-flex; align-items:center; gap:10px; white-space:nowrap;
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink); border:1px solid var(--line-light); border-radius:10px; padding:14px 20px;
  min-height:48px; transition:border-color .25s, color .25s, transform .25s var(--ease);
}
.ext-link svg{ width:14px; height:14px; }
.ext-link:hover{ border-color:var(--arc); color:var(--arc); transform:translateY(-2px); }

/* ---------- product detail pages ---------- */
.detail-hero{ padding:calc(var(--nav-h) + 56px) 0 64px; overflow:hidden; }
.detail-hero .hero-grid{ grid-template-columns:1fr .85fr; }
.detail-hero h1{ font-size:clamp(2rem, 4.4vw, 3.4rem); font-weight:700; }
.detail-hero .tagline{ margin-top:16px; max-width:480px; }
.detail-hero .wrap-center .tagline{ margin-left:auto; margin-right:auto; }

.back-link{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.2em; text-transform:uppercase;
  color:var(--mist); margin-bottom:26px; transition:color .25s;
  min-height:32px;
}
.back-link:hover{ color:var(--arc); }
.back-link svg{ width:14px; height:14px; }

/* ---------- specification tables ---------- */
.spec-block{ display:grid; grid-template-columns:215px 1fr; gap:22px; align-items:start; }
.spec-product{
  border:1px solid var(--line-light); border-radius:var(--r); background:var(--card);
  overflow:hidden; position:sticky; top:calc(var(--nav-h) + 20px);
  box-shadow:var(--shadow);
}
.spec-product .spec-stage{ aspect-ratio:1/1; }
.spec-product h3{
  padding:14px 16px 16px; border-top:1px solid var(--line-light);
  font-size:1.2rem; font-weight:700; text-align:center;
}

.table-scroll{
  overflow-x:auto; border-radius:var(--r); border:1px solid var(--line-light);
  box-shadow:var(--shadow); background:var(--card); -webkit-overflow-scrolling:touch;
}
.spec-table{ width:100%; border-collapse:collapse; min-width:760px; }
.spec-table caption{
  caption-side:top; text-align:left; padding:16px 20px;
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.22em; text-transform:uppercase;
  color:var(--slate); border-bottom:1px solid var(--line-light); background:var(--paper);
}
.spec-table th{
  background:var(--ink); color:var(--white);
  font-family:var(--font-mono); font-size:.68rem; font-weight:500; letter-spacing:.18em;
  text-transform:uppercase; text-align:left; padding:14px 18px; white-space:nowrap;
}
.spec-table td{
  padding:15px 18px; border-bottom:1px solid var(--line-light); vertical-align:top;
  font-size:.88rem; color:var(--slate);
}
.spec-table tbody tr:last-child td{ border-bottom:0; }
.spec-table tbody tr:nth-child(even){ background:#F8FAFC; }
.spec-table td:first-child{
  font-family:var(--font-display); text-transform:uppercase; letter-spacing:.03em;
  font-size:1rem; font-weight:700; color:var(--ink);
  border-left:3px solid var(--arc);
}
.spec-table .grades{ font-family:var(--font-mono); font-size:.78rem; color:#33526C; line-height:1.7; }

/* two-column tables would otherwise stretch the value column to the far edge */
.spec-table.cols-2{ min-width:0; }
.spec-table.cols-2 td:first-child,.spec-table.cols-2 th:first-child{ width:42%; }

/* phones — every row becomes its own labelled card. A five-column
   technical table cannot be read at 390px any other way. */
@media (max-width:760px){
  .table-scroll{ border:0; box-shadow:none; background:transparent; overflow:visible; border-radius:0; }
  .spec-table{ min-width:0; display:block; }
  /* the product name is already shown in the card directly above, so the
     caption is pure repetition here — hide it visually, keep it for
     screen readers (a <table> should always have an accessible name) */
  .spec-table caption{
    position:absolute; width:1px; height:1px; overflow:hidden;
    clip:rect(0 0 0 0); clip-path:inset(50%); white-space:nowrap;
    padding:0; border:0;
  }
  .spec-table thead{
    position:absolute; width:1px; height:1px; overflow:hidden;
    clip:rect(0 0 0 0); clip-path:inset(50%); white-space:nowrap;
  }
  .spec-table tbody{ display:block; }
  .spec-table tr{
    display:block; background:var(--card); border:1px solid var(--line-light);
    border-radius:12px; margin-bottom:14px; overflow:hidden;
  }
  .spec-table tbody tr:nth-child(even){ background:var(--card); }
  .spec-table td{
    display:block; padding:12px 16px; border-bottom:1px solid var(--line-light);
    font-size:.9rem;
  }
  .spec-table tbody tr td:last-child{ border-bottom:0; }
  .spec-table td::before{
    content:attr(data-label); display:block;
    font-family:var(--font-mono); font-size:.56rem; font-weight:500;
    letter-spacing:.2em; text-transform:uppercase; color:#7C93A6; margin-bottom:5px;
  }
  .spec-table td:first-child{
    background:var(--ink); color:var(--white); border-left:0;
    font-size:1.1rem; padding:14px 16px;
    width:auto;
  }
  /* must match the specificity of the desktop `.cols-2 td:first-child`
     rule (0,3,1) or it loses the cascade and the dark material band
     keeps its 42% desktop column width in the stacked card layout */
  .spec-table.cols-2 td:first-child,
  .spec-table.cols-2 th:first-child{ width:auto; }
  .spec-table td:first-child::before{ color:var(--arc); }
  .spec-table .grades{ font-size:.76rem; }
}

/* single-column "types available" table — no dark first-column band */
.spec-table.list td:first-child{
  background:transparent; color:var(--ink);
  font-family:var(--font-display); font-size:1.02rem; font-weight:700;
  text-transform:none; letter-spacing:0;
  border-left:3px solid var(--arc);
}
@media (max-width:760px){
  .spec-table.list td:first-child{
    background:var(--card); color:var(--ink);
    border-left:3px solid var(--arc); font-size:1rem;
  }
  .spec-table.list td:first-child::before{ color:#7C93A6; }
}

/* aside note — de-emphasised, non-core scope */
.aside-note{
  margin-top:36px; max-width:900px;
  border-left:3px solid var(--line-light); padding:16px 0 16px 22px;
}
.aside-note h3{
  font-family:var(--font-mono); font-size:.68rem; font-weight:500; letter-spacing:.24em;
  text-transform:uppercase; color:var(--slate); margin-bottom:8px;
}
.aside-note p{ font-size:.9rem; color:var(--slate); }

/* references */
.ref-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:12px; }
.ref{
  display:flex; gap:14px; align-items:flex-start;
  background:var(--card); border:1px solid var(--line-light); border-radius:12px; padding:16px 18px;
  transition:border-color .3s, transform .3s var(--ease);
}
.ref:hover{ border-color:rgba(56,182,255,.55); transform:translateX(4px); }
.ref code{
  flex:0 0 auto; font-family:var(--font-mono); font-size:.72rem; font-weight:500; letter-spacing:.06em;
  color:#1E7FBE; background:var(--arc-soft); border-radius:8px; padding:6px 10px; margin-top:1px;
  white-space:nowrap;
}
.ref p{ font-size:.86rem; }

/* brand cloud */
.brand-cloud{ display:flex; flex-wrap:wrap; gap:10px; }
.brand-cloud span{
  font-family:var(--font-mono); font-size:.74rem; letter-spacing:.06em;
  padding:9px 14px; border-radius:999px;
  border:1px solid var(--line-dark); color:var(--mist); background:var(--ink-2);
  transition:color .25s, border-color .25s, transform .25s var(--ease);
}
.brand-cloud span:hover{ color:var(--arc); border-color:var(--arc); transform:translateY(-2px); }

/* explore products */
.explore-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:14px; }
.explore-tile{
  border:1px solid var(--line-dark); border-radius:var(--r); background:var(--ink-2);
  padding:22px 12px 18px; text-align:center;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:12px;
  min-height:110px;
  transition:transform .3s var(--ease), border-color .3s, background .3s;
}
.explore-tile svg{ width:30px; height:30px; color:var(--mist); transition:color .3s; }
.explore-tile span{
  font-family:var(--font-mono); font-size:.75rem; letter-spacing:.08em; text-transform:uppercase;
  color:var(--mist); line-height:1.35;
}
.explore-tile:hover{ transform:translateY(-5px); border-color:var(--arc); }
.explore-tile:hover svg,.explore-tile:hover span{ color:var(--arc); }
.explore-tile.current{
  background:linear-gradient(160deg, rgba(56,182,255,.2), rgba(56,182,255,.05));
  border-color:var(--arc);
}
.explore-tile.current svg,.explore-tile.current span{ color:var(--arc); }

/* ---------- legal pages ---------- */
.legal-hero{ padding:calc(var(--nav-h) + 72px) 0 56px; }
.legal-hero h1{ font-size:clamp(1.9rem, 3.8vw, 2.9rem); font-weight:700; }
.legal-hero p{ max-width:760px; margin-top:18px; }
.legal-meta{
  margin-top:24px; display:flex; flex-wrap:wrap; gap:10px 22px;
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.2em; text-transform:uppercase; color:var(--mist);
}
.legal-list{ max-width:880px; margin:0 auto; display:grid; gap:18px; }
.legal-card{
  background:var(--card); border:1px solid var(--line-light); border-left:4px solid var(--arc);
  border-radius:12px; padding:28px 30px;
}
.legal-card:nth-child(even){ border-left-color:var(--amber); }
.legal-card h2{
  font-size:1.35rem; font-weight:700; display:flex; align-items:baseline; gap:12px; flex-wrap:wrap;
}
.legal-card h2 code{ font-family:var(--font-mono); font-size:.8rem; color:#1E7FBE; }
.legal-card p{ margin-top:10px; font-size:.94rem; }
.legal-card ul{ margin-top:10px; display:grid; gap:8px; }
.legal-card li{
  font-size:.94rem; padding-left:18px; position:relative;
}
.legal-card li::before{
  content:""; position:absolute; left:0; top:.65em; width:7px; height:1px; background:var(--arc);
}
.legal-card address{ font-style:normal; margin-top:12px; font-size:.94rem; line-height:1.9; }
.legal-card address a{ color:#1E7FBE; border-bottom:1px solid currentColor; }

/* ---------- footer ---------- */
.footer{
  background:var(--ink); color:var(--mist);
  border-top:1px solid var(--line-dark);
  padding:72px 0 0;
}
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.3fr; gap:36px; padding-bottom:52px; }
.footer h2{
  font-family:var(--font-mono); font-size:.7rem; font-weight:500; letter-spacing:.26em;
  text-transform:uppercase; color:var(--white); margin-bottom:18px;
}
.footer h2::after{ content:""; display:block; width:26px; height:2px; background:var(--amber); margin-top:8px; }
.footer p{ font-size:.9rem; max-width:300px; }
.footer .f-legal-name{
  font-family:var(--font-mono); font-size:.66rem; letter-spacing:.16em; text-transform:uppercase;
  color:var(--white); margin-bottom:10px; max-width:300px; line-height:1.7;
}
.footer li{ margin-bottom:1px; }
/* 23px line boxes are far too small to tap — pad out to ~41px */
.footer li a{ font-size:.95rem; transition:color .25s, padding-left .25s; display:inline-block; padding:9px 0; }
.footer li a:hover{ color:var(--arc); padding-left:4px; }
.footer .f-contact li{ display:flex; gap:10px; align-items:flex-start; font-size:.95rem; padding:5px 0; }
.footer .f-contact svg{ width:16px; height:16px; flex:0 0 auto; margin-top:4px; color:var(--arc); }
.footer .f-contact a:hover{ color:var(--arc); padding-left:0; }
.footer-bottom{
  border-top:1px solid var(--line-dark); padding:22px 0 calc(22px + env(safe-area-inset-bottom));
  display:flex; justify-content:space-between; align-items:center; gap:14px; flex-wrap:wrap;
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.1em;
}
.footer-bottom nav{ display:flex; gap:8px 22px; flex-wrap:wrap; }
.footer-bottom nav a{ display:inline-block; padding:11px 0; }
.footer-bottom a:hover{ color:var(--arc); }

/* ---------- reveal states (JS enhanced) ---------- */
.js .reveal{ opacity:0; transform:translateY(30px); }
.js .reveal.in{
  opacity:1; transform:none;
  transition:opacity .8s var(--ease), transform .8s var(--ease);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1100px){
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }
}
@media (max-width:1180px){
  .cat-grid{ grid-template-columns:repeat(3,1fr); }
}
@media (max-width:1024px){
  .cat-grid{ grid-template-columns:repeat(2,1fr); }
  .feat-grid,.feat-grid.cols-3,.value-grid{ grid-template-columns:repeat(2,1fr); }
  .explore-grid{ grid-template-columns:repeat(2,1fr); }
  .split{ gap:36px; }
}

/* --- tablet / large phone --- */
@media (max-width:900px){
  :root{ --gut:20px; }
  .nav-burger{ display:flex; }
  .nav-links{
    position:fixed; inset:0; z-index:1100;
    height:100vh; height:100dvh;
    flex-direction:column; justify-content:center; gap:4px;
    /* fully opaque: a translucent panel lets the 3D models show through
       and hurts legibility of the menu itself */
    background:linear-gradient(180deg, #0B1826 0%, #070F18 100%);
    -webkit-backdrop-filter:blur(18px); backdrop-filter:blur(18px);
    opacity:0; pointer-events:none; transition:opacity .3s var(--ease);
    padding:calc(var(--nav-h) + 28px) 24px calc(40px + env(safe-area-inset-bottom));
    overflow-y:auto; overscroll-behavior:contain;
    -webkit-overflow-scrolling:touch;
  }
  .nav-links.open{ opacity:1; pointer-events:auto; }
  .nav-links a:not(.nav-cta){ font-size:1.05rem; padding:14px 22px; min-height:48px; display:flex; align-items:center; justify-content:center; }
  .nav-links a.active::after{ left:22px; right:22px; }
  .nav-cta{ margin:18px 0 0; }
}

@media (max-width:860px){
  .hero-grid,.detail-hero .hero-grid,.split,.contact-grid{ grid-template-columns:1fr; }
  .hero{ padding-top:calc(var(--nav-h) + 28px); min-height:auto; padding-bottom:8px; }
  .hero-stage{ order:-1; max-height:min(74vw, 380px); aspect-ratio:auto; height:min(74vw,380px); }
  .detail-stage{ order:-1; max-height:min(68vw,340px); aspect-ratio:auto; height:min(68vw,340px); }
  .split .model-stage{ aspect-ratio:auto; height:min(78vw,400px); }
  .facility .model-stage{ aspect-ratio:auto; height:min(64vw,320px); }
  .section{ padding:72px 0; }
  .section-tight{ padding:56px 0; }
  .detail-hero{ padding:calc(var(--nav-h) + 36px) 0 48px; }
  .legal-hero{ padding:calc(var(--nav-h) + 48px) 0 40px; }
  .sec-head{ margin-bottom:40px; }
  .ref-grid{ grid-template-columns:1fr; }
  .stat-row{ margin-top:40px; }
  .marquee{ margin-top:44px; }
  .location-card{ grid-template-columns:1fr; }
  .panel{ padding:26px 22px; }
  .legal-card{ padding:24px 22px; }
}

/* The 215px spec sidebar is unreadably cramped below this. Stack it and
   let the product model take real width — it was a postage stamp before. */
@media (max-width:900px){
  .spec-block{ grid-template-columns:1fr; gap:18px; }
  .spec-product{ position:static; max-width:none; margin:0; display:flex; align-items:stretch; }
  .spec-product .spec-stage{ flex:1 1 auto; aspect-ratio:16/10; max-height:330px; }
  .spec-product h3{
    flex:0 0 auto; display:flex; align-items:center; justify-content:center;
    writing-mode:vertical-rl; transform:rotate(180deg);
    border-top:0; border-right:1px solid var(--line-light);
    padding:18px 12px; letter-spacing:.06em;
  }
}
@media (max-width:560px){
  .spec-product{ display:block; }
  .spec-product .spec-stage{ aspect-ratio:4/3; }
  .spec-product h3{
    writing-mode:horizontal-tb; transform:none; display:block;
    border-right:0; border-top:1px solid var(--line-light);
    padding:14px 16px 16px; font-size:1.2rem;
  }
}

/* smaller photo files on narrow screens — same layers, lighter payload */
@media (max-width:900px){
  .hero.dark{ --bg-photo:url(../img/refinery-hero-sm.jpg); }
  .detail-hero.dark,.legal-hero.dark,.cta-band{ --bg-photo:url(../img/refinery-cta-sm.jpg); }
}

/* --- phone --- */
@media (max-width:640px){
  :root{ --gut:16px; --nav-h:64px; }
  body{ font-size:15.5px; }

  .brand-name{ font-size:1.3rem; }
  .brand-text small{ font-size:.72rem; letter-spacing:.04em; }

  .cat-grid,.feat-grid,.feat-grid.cols-3,.value-grid,.stat-row{ grid-template-columns:1fr; }
  .explore-grid{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr; gap:30px; padding-bottom:40px; }
  .footer p,.footer .f-legal-name{ max-width:none; }
  .footer-bottom{ justify-content:flex-start; }

  .section{ padding:60px 0; }
  .section-tight{ padding:48px 0; }
  .hero-sub{ font-size:1rem; margin:18px 0 28px; }
  .hero-meta{ margin-top:32px; gap:8px 20px; font-size:.66rem; }
  .sec-head h2{ font-size:clamp(1.9rem,7.5vw,2.6rem); }
  .sec-head p{ font-size:.98rem; }

  .btn{ padding:14px 20px; font-size:.74rem; letter-spacing:.14em; }
  .hero-ctas{ gap:10px; }
  .hero-ctas .btn{ flex:1 1 auto; min-width:150px; }
  .cta-band .hero-ctas .btn{ flex:1 1 100%; }

  /* product cards go horizontal on phones — six full-height cards
     is an unreasonable amount of scrolling for a category list */
  .cat-card{ flex-direction:row; align-items:center; gap:18px; padding:16px; }
  .cat-card .cat-stage{ flex:0 0 38%; max-width:150px; aspect-ratio:1/1; margin:0; }
  .cat-body{ flex:1 1 auto; min-width:0; }
  .cat-card h3{ font-size:1.4rem; }
  .cat-link{ margin-top:6px; font-size:.66rem; letter-spacing:.16em; }
  .brand-cloud{ gap:8px; }
  .brand-cloud span{ font-size:.68rem; padding:8px 12px; }
  .ref{ padding:14px 16px; gap:12px; }
  .ref code{ font-size:.68rem; padding:5px 8px; }
  .marquee span{ font-size:1rem; padding:0 16px; gap:16px; }
  .explore-tile{ min-height:96px; padding:18px 10px 14px; }
  .legal-card h2{ font-size:1.2rem; }
}

@media (max-width:400px){
  .brand-text small{ font-size:.72rem; letter-spacing:.01em; }
  .brand-name{ font-size:1.18rem; }
  .explore-grid{ grid-template-columns:1fr; }
  .explore-tile{ flex-direction:row; justify-content:flex-start; gap:14px; min-height:64px; padding:14px 16px; }
  .explore-tile svg{ width:24px; height:24px; }
  .hero-ctas .btn{ flex:1 1 100%; }
}

/* touch devices — drop hover transforms that stick */
@media (hover:none){
  .cat-card:hover,.feat:hover,.value:hover,.explore-tile:hover,
  .btn-solid:hover,.btn-ghost:hover,.ext-link:hover,.ref:hover,.brand-cloud span:hover{
    transform:none;
  }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .marquee-track,.hero-stage::after{ animation:none; }
  .js .reveal{ opacity:1; transform:none; transition:none; }
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}

/* ---------- print ---------- */
@media print{
  .nav,.progress,#gl,.marquee,.cta-band,.stage-hint,.skip{ display:none !important; }
  body{ background:#fff; color:#000; }
  .dark,.blueprint{ background:#fff !important; color:#000 !important; }
  .dark h1,.dark h2,.dark h3{ color:#000 !important; }
  .section{ padding:24px 0; }
  a[href^="http"]::after{ content:" (" attr(href) ")"; font-size:.8em; }
}