/* Powderial — Industrial precision / deep-tech design system (see DESIGN.md) */
:root{
  --bg:#0A0D12;
  --surface:#12161D;
  --surface-2:#171C26;
  --line:#232B38;
  --line-soft:#1b212c;
  --fg:#E8ECF2;
  --muted:#9AA4B6;
  --accent:#36D0E8;
  --accent-2:#1FA6C4;
  --ember:#FF6A3D;
  --maxw:1120px;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --display:"Space Grotesk","IBM Plex Sans",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:var(--sans);line-height:1.65;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 500px at 80% -5%, rgba(54,208,232,.10), transparent 60%),
    radial-gradient(700px 400px at -5% 8%, rgba(31,166,196,.06), transparent 55%);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}

/* ── scroll progress "burn line" ── */
#progress-bar{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:1000;
  background:linear-gradient(90deg,var(--accent),var(--ember));
  box-shadow:0 0 12px rgba(54,208,232,.6);
}

/* ── shared ── */
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--accent);margin:0 0 18px;display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--accent);display:inline-block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
section{padding:104px 0;border-top:1px solid var(--line-soft);scroll-margin-top:76px;}
.section-title{font-family:var(--display);font-size:clamp(28px,4vw,40px);font-weight:600;line-height:1.1;margin:0 0 16px;letter-spacing:-.02em;}
.section-intro{color:var(--muted);max-width:620px;font-size:17px;margin:0 0 48px;}

/* reveal */
html.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease;}
html.js .reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){html.js .reveal{opacity:1;transform:none;transition:none;}#progress-bar{display:none;}}

/* ── header ── */
.site-header{
  position:sticky;top:0;z-index:900;display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;background:rgba(10,13,18,.72);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:600;font-size:18px;letter-spacing:.01em;}
.brand img{width:26px;height:26px;border-radius:5px;object-fit:cover;}
.nav{display:flex;align-items:center;gap:28px;}
.nav a{font-family:var(--mono);font-size:13px;letter-spacing:.04em;color:var(--muted);transition:color .2s;}
.nav a:hover{color:var(--fg);}
.btn{
  font-family:var(--mono);font-size:13px;letter-spacing:.03em;
  display:inline-flex;align-items:center;justify-content:center;min-height:44px;
  padding:9px 18px;border:1px solid var(--accent);color:var(--accent);
  border-radius:5px;transition:.2s;white-space:nowrap;
}
.btn:hover{background:var(--accent);color:#04222a;box-shadow:0 0 22px rgba(54,208,232,.35);}
.btn-solid{background:var(--accent);color:#04222a;font-weight:600;}
.btn-solid:hover{background:#5fe0f4;}
.btn-ghost{border-color:var(--line);color:var(--fg);}
.btn-ghost:hover{border-color:var(--fg);background:transparent;box-shadow:none;}

/* ── hero ── */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-grid{
  position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(80% 70% at 70% 20%,#000,transparent 75%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
  max-width:var(--maxw);margin:0 auto;padding:96px 28px 104px;}
.hero h1{font-family:var(--display);font-weight:700;font-size:clamp(40px,6vw,72px);line-height:1.02;letter-spacing:-.03em;margin:0 0 22px;}
.hero h1 .accent{color:var(--accent);}
.hero p.sub{color:var(--muted);font-size:19px;max-width:520px;margin:0 0 32px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.hero-figure{position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;}
.hero-figure img{width:100%;height:420px;object-fit:cover;filter:contrast(1.05) saturate(.9);}
.hero-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(10,13,18,.55));}
.hero-tag{position:absolute;left:14px;bottom:12px;z-index:2;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--fg);background:rgba(10,13,18,.6);border:1px solid var(--line);padding:5px 9px;border-radius:4px;}

/* ── sector chips ── */
.sectors{display:flex;flex-wrap:wrap;gap:12px;max-width:var(--maxw);margin:0 auto;padding:26px 28px;border-bottom:1px solid var(--line-soft);}
.sectors .lbl{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);align-self:center;margin-right:6px;}
.chip{font-family:var(--mono);font-size:12px;letter-spacing:.05em;color:var(--fg);padding:7px 13px;border:1px solid var(--line);border-radius:5px;background:var(--surface);}
.chip:hover{border-color:var(--accent);color:var(--accent);}

/* ── credibility strip ── */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden;}
.stat{background:var(--bg);padding:24px 22px;display:flex;flex-direction:column;gap:7px;}
.stat .num{font-family:var(--display);font-size:26px;font-weight:600;color:var(--fg);letter-spacing:-.01em;}
.stat .lbl{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);}

/* ── products ── */
.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.product-card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:.25s;display:flex;flex-direction:column;}
.product-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 14px 40px rgba(0,0,0,.45);}
.product-card .pc-img{height:188px;width:100%;object-fit:cover;filter:grayscale(.2) contrast(1.05);}
.pc-body{padding:22px 22px 24px;}
.pc-index{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--accent);}
.product-card h3{font-family:var(--display);font-size:22px;font-weight:600;margin:6px 0 10px;}
.product-card p{color:var(--muted);font-size:14.5px;margin:0 0 16px;}
.pc-link{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--fg);display:inline-flex;align-items:center;gap:7px;}
.pc-link .arrow{color:var(--accent);transition:transform .2s;}
.product-card:hover .pc-link .arrow{transform:translateX(4px);}

/* ── application ── */
.slideshow{position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#0e1218;}
.slide{display:none;width:100%;max-height:560px;object-fit:contain;margin:0 auto;}
.slide.active{display:block;}
.slide-btn{position:absolute;top:50%;transform:translateY(-50%);background:rgba(10,13,18,.6);color:var(--fg);border:1px solid var(--line);cursor:pointer;width:42px;height:42px;border-radius:50%;font-size:16px;transition:.2s;}
.slide-btn:hover{border-color:var(--accent);color:var(--accent);}
.slide-btn.prev{left:14px;}.slide-btn.next{right:14px;}
.dots{display:flex;gap:8px;justify-content:center;padding:16px 0;}
.dot{width:8px;height:8px;border-radius:50%;background:#39414f;cursor:pointer;transition:.2s;}
.dot.active{background:var(--accent);box-shadow:0 0 10px rgba(54,208,232,.6);}

/* ── spec / portfolio tables ── */
.table-title{font-family:var(--mono);font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:36px 0 14px;}
.table-note{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--muted);margin:14px 0 0;}
.inline-link{color:var(--accent);border-bottom:1px solid rgba(54,208,232,.4);}
.inline-link:hover{border-bottom-color:var(--accent);}

/* material chips */
.material-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;}
.material-chips .chip{font-size:13px;}
.table-wrap{border:1px solid var(--line);border-radius:10px;overflow:hidden;overflow-x:auto;}
table{width:100%;border-collapse:collapse;font-size:14.5px;}
thead th{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);text-align:left;padding:14px 18px;background:var(--surface-2);border-bottom:1px solid var(--line);}
tbody td{padding:13px 18px;border-bottom:1px solid var(--line-soft);color:var(--muted);}
tbody tr:nth-child(even){background:rgba(255,255,255,.012);}
tbody tr:last-child td{border-bottom:none;}
tbody td:first-child{color:var(--fg);font-weight:500;}
tbody td.spec{font-family:var(--mono);color:var(--fg);}
tbody tr:hover td{background:rgba(54,208,232,.04);}

/* ── contact ── */
#contact .wrap{max-width:760px;}
.form-shell{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 20px;}
#contact iframe{border:none;width:100%;}

/* ── footer ── */
.site-footer{border-top:1px solid var(--line);padding:48px 28px 40px;}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.site-footer img{height:30px;opacity:.85;}
.site-footer .copy{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--muted);}

/* ── responsive ── */
@media (max-width:820px){
  .hero-inner{grid-template-columns:1fr;padding-top:64px;}
  .hero-figure{order:-1;}.hero-figure img{height:240px;}
  .product-grid{grid-template-columns:1fr;}
  .stats{grid-template-columns:repeat(2,1fr);}
  section{padding:72px 0;}
}

/* ── active nav + mobile hamburger (multi-page) ── */
.nav a.active{color:var(--fg);}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:9px;}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--fg);transition:.25s;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
@media (max-width:820px){
  .site-header{position:sticky;}
  .nav-toggle{display:flex;}
  .nav{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(10,13,18,.98);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
    padding:6px 0 14px;display:none;}
  .nav.open{display:flex;}
  .nav a:not(.btn){padding:14px 28px;border-top:1px solid var(--line-soft);}
  .nav a.btn{margin:14px 28px 4px;justify-content:center;}
}

/* ── page header (sub-page) ── */
.page-head{padding:84px 0 38px;border-bottom:1px solid var(--line-soft);position:relative;overflow:hidden;}
.page-head::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 320px at 80% -25%,rgba(54,208,232,.10),transparent 60%);pointer-events:none;}
.page-head .wrap{position:relative;}
.page-title{font-family:var(--display);font-size:clamp(34px,5vw,56px);font-weight:700;letter-spacing:-.02em;line-height:1.05;margin:0 0 18px;}
.page-lead{color:var(--muted);font-size:18px;max-width:680px;margin:0;}
.spec-jump{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.spec-jump .chip{cursor:pointer;}

/* ── alternating band + CTA ── */
.alt-band{background:var(--surface);}
.cta-band{background:linear-gradient(180deg,var(--surface),var(--bg));}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-inner .btn{flex-shrink:0;}

/* ── product detail ── */
.product-detail .pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.pd-media{border:1px solid var(--line);border-radius:10px;overflow:hidden;}
.pd-media img{width:100%;height:340px;object-fit:cover;filter:grayscale(.15) contrast(1.05);}
.pd-rev .pd-media{order:2;}
.feature-list{list-style:none;padding:0;margin:0 0 24px;}
.feature-list li{position:relative;padding:9px 0 9px 22px;color:var(--muted);font-size:15px;border-bottom:1px solid var(--line-soft);}
.feature-list li::before{content:"—";position:absolute;left:0;color:var(--accent);}

/* ── industries ── */
.industry-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.industry-card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:30px;transition:.25s;}
.industry-card:hover{border-color:var(--accent);transform:translateY(-3px);}
.industry-card h2{font-family:var(--display);font-size:22px;font-weight:600;margin:10px 0 10px;}
.industry-card p{color:var(--muted);font-size:15px;margin:0;}

/* ── contact ── */
.contact-grid{display:grid;grid-template-columns:.8fr 1.4fr;gap:36px;align-items:start;}

/* ── footer (multi-page) ── */
.footer-nav{display:flex;gap:24px;flex-wrap:wrap;}
.footer-nav a{font-family:var(--mono);font-size:13px;letter-spacing:.04em;color:var(--muted);}
.footer-nav a:hover{color:var(--fg);}
.footer-brand img{height:30px;opacity:.85;}
.site-footer .copy{max-width:var(--maxw);margin:24px auto 0;padding-top:20px;border-top:1px solid var(--line-soft);}

@media (max-width:820px){
  .product-detail .pd-grid{grid-template-columns:1fr;gap:24px;}
  .pd-rev .pd-media{order:-1;}
  .pd-media img{height:240px;}
  .industry-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}