/* ===================================================================
   ZAIHUI Stainless Steel — "Material Library" editorial design system
   Serif display (Fraunces) · mono specs (IBM Plex Mono) · warm paper
   =================================================================== */
:root{
  --paper:#f5f3ee;        /* warm gallery paper */
  --paper-2:#efece4;      /* slightly deeper panel */
  --card:#fbfaf7;         /* raised tile */
  --ink:#1c1b18;          /* warm near-black */
  --ink-2:#2a2825;
  --text:#26241f;
  --steel:#6f6c64;        /* muted body / labels */
  --steel-2:#9b978d;      /* faint */
  --line:#ddd8cd;         /* warm hairline */
  --line-2:#c9c3b5;
  --accent:#c8521b;       /* refined ZAIHUI orange, tuned for paper */
  --accent-2:#e0641f;
  --on-accent:#fff;
  --max:1320px;
  --gut:40px;
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:var(--sans);font-size:18px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#fff}

h1,h2,h3,h4{font-family:var(--serif);font-weight:500;margin:0;line-height:1.04;
  letter-spacing:-.015em;font-optical-sizing:auto}
h1{font-size:clamp(44px,6vw,82px)}
h2{font-size:clamp(30px,3.6vw,46px)}
h3{font-size:24px}
p{margin:0}

.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.section{padding:120px 0}
.section--tight{padding:84px 0}
.center{text-align:center}
.narrow{max-width:760px;margin-inline:auto}
.muted{color:var(--steel)}

/* ---- mono eyebrow / kicker ---- */
.eyebrow{display:inline-block;font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--accent)}

/* ---- section head ---- */
.head{max-width:760px;margin-bottom:54px}
.head.center{margin-inline:auto}
.head .eyebrow{margin-bottom:20px}
.head h2{margin:0}
.head p{margin-top:22px;color:var(--steel);font-size:19px;line-height:1.6;font-family:var(--sans)}

/* ---- hairline rule helper ---- */
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ===================== BUTTONS / LINKS ===================== */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--sans);
  font-weight:600;font-size:15px;letter-spacing:.01em;padding:15px 26px;border-radius:3px;
  border:1px solid transparent;cursor:pointer;transition:background .25s,color .25s,border-color .25s}
.btn--primary{background:var(--accent);color:var(--on-accent)}
.btn--primary:hover{background:var(--ink)}
.btn--dark{background:var(--ink);color:var(--paper)}
.btn--dark:hover{background:var(--accent)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn--ghost:hover{border-color:var(--ink);background:transparent}
.btn--light{background:var(--paper);color:var(--ink)}
.btn--light:hover{background:#fff}
.arw{transition:transform .25s var(--ease)}
.btn:hover .arw,.more:hover .arw,a:hover>.arw{transform:translateX(4px)}

/* text link with animated underline (used for .more) */
.more{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:13px;
  font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);
  padding-bottom:4px;position:relative}
.more::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--ink);transform-origin:left;transition:background .3s}
.more:hover::after{background:var(--accent)}
.more .arw{color:var(--accent)}

/* ===================== NAV ===================== */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:transparent;
  transition:background .35s,border-color .35s;border-bottom:1px solid transparent}
.nav__in{display:flex;align-items:center;gap:40px;height:78px;max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.nav.scrolled{background:rgba(245,243,238,.86);backdrop-filter:saturate(140%) blur(10px);border-color:var(--line)}
.nav__brand{display:flex;align-items:center;gap:12px}
.nav__mark{height:32px;width:auto;display:block}
.nav__wm{display:flex;flex-direction:column;line-height:1}
.nav__wm b{font-family:var(--serif);font-weight:600;font-size:20px;letter-spacing:.01em;color:var(--ink)}
.nav__wm small{font-family:var(--mono);font-size:8.5px;font-weight:500;letter-spacing:.24em;text-transform:uppercase;color:var(--steel);margin-top:4px}
.nav__links{display:flex;gap:30px;margin-left:6px}
.nav__links a{font-family:var(--mono);font-weight:500;font-size:12.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink);opacity:.72;transition:opacity .2s,color .2s}
.nav__links a:hover{opacity:1;color:var(--accent)}
.nav__spacer{flex:1}
.nav__cta{margin-left:4px;padding:12px 22px}
.nav__burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__burger span{width:24px;height:2px;background:var(--ink);display:block}
.nav__drawer{display:none}
.nav__drawer.open{display:flex;flex-direction:column;gap:4px;padding:14px var(--gut) 24px;background:var(--paper);border-bottom:1px solid var(--line)}
.nav__drawer a{font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;padding:12px 0;border-bottom:1px solid var(--line)}
.nav__drawer .btn{margin-top:12px;justify-content:center}

/* ===================== HERO (home — editorial split) ===================== */
.hero{position:relative;padding:150px 0 0;background:var(--paper);overflow:hidden}
.hero__in{max-width:var(--max);margin:0 auto;padding:0 var(--gut);
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:end}
.hero__brand{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);margin-bottom:26px}
.hero h1{margin:0}
.hero h1 b{font-style:italic;font-weight:500;color:var(--accent)}
.hero__sub{margin:30px 0 0;font-size:19px;line-height:1.6;color:var(--steel);max-width:46ch}
.hero__cta{display:flex;gap:16px;align-items:center;margin:38px 0 4px;flex-wrap:wrap}
/* hero image (home: a real <img> in .hero__bg) */
.hero__bg{position:relative;width:100%;min-height:430px;border-radius:4px;overflow:hidden;
  background:var(--paper-2) center/cover no-repeat;align-self:stretch}
.hero__bg img{width:100%;height:100%;object-fit:cover;display:block}
/* hero stats row */
.hero__stats{max-width:var(--max);margin:84px auto 0;padding:0 var(--gut)}
.hero__statgrid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.hero__stats .col{padding:30px 28px 0;border-right:1px solid var(--line)}
.hero__stats .col:last-child{border-right:0}
.hero__stats .n{font-family:var(--serif);font-size:40px;font-weight:500;color:var(--ink);line-height:1}
.hero__stats .l{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--steel);margin-top:12px;line-height:1.5}
.scrollcue{display:none}

/* sub-hero for interior pages (light masthead with banner image) */
.subhero{position:relative;padding:140px 0 0;background:var(--paper)}
.subhero__in{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.subhero h1{max-width:16ch;margin:22px 0 0}
.subhero__sub{margin:26px 0 0;font-size:19px;color:var(--steel);max-width:60ch}
.subhero__img{max-width:var(--max);margin:64px auto 0;padding:0 var(--gut)}
.subhero__img .frame{display:block;width:100%;height:clamp(240px,34vw,440px);object-fit:cover;border-radius:4px;background:var(--paper-2)}

/* ===================== GRADE SYSTEM (home signature) ===================== */
.grades{border-top:1px solid var(--line)}
.grades__grid{display:grid;grid-template-columns:repeat(3,1fr)}
.gcard{display:block;padding:48px 36px;border-right:1px solid var(--line);position:relative;
  transition:background .3s}
.gcard:last-child{border-right:0}
.gcard:hover{background:var(--card)}
.gcard__no{font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--accent)}
.gcard__grade{font-family:var(--serif);font-size:64px;font-weight:500;line-height:1;margin:18px 0 6px;color:var(--ink)}
.gcard h3{font-size:20px;margin:0 0 12px}
.gcard p{color:var(--steel);font-size:16px;line-height:1.6}
.gcard__img{margin-top:26px;height:170px;border-radius:3px;overflow:hidden;background:var(--paper-2)}
.gcard__img img{width:100%;height:100%;object-fit:cover}
.gcard .more{margin-top:22px}

/* ===================== CATALOGUE / LOOKBOOK + generic pcards ===================== */
.products,.catalog-section{background:var(--paper)}
.lookbook{display:grid;grid-template-columns:repeat(12,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.lcard{grid-column:span 4;background:var(--paper);padding:0;display:flex;flex-direction:column;transition:background .3s}
.lcard--wide{grid-column:span 6}
.lcard:hover{background:var(--card)}
.lcard__img{height:230px;overflow:hidden;background:var(--paper-2)}
.lcard__img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.lcard:hover .lcard__img img{transform:scale(1.04)}
.lcard__body{padding:26px 28px 30px;display:flex;flex-direction:column;gap:10px;flex:1}
.lcard__cat{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.lcard h3{font-size:23px}
.lcard p{color:var(--steel);font-size:15.5px;line-height:1.55;flex:1}
.lcard .more{margin-top:8px}

/* generic product cards (.pcard) — editorial tile, used by showcase + catalog */
.tabs{display:flex;gap:0;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:0}
.tab{font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;
  background:none;border:0;border-bottom:2px solid transparent;color:var(--steel);
  padding:16px 22px;cursor:pointer;margin-bottom:-1px;transition:color .2s,border-color .2s}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--ink);border-color:var(--accent)}
.panel{display:none;padding-top:40px}
.panel.active{display:block}
.showcase{display:grid;grid-template-columns:320px 1fr;gap:40px;align-items:start}
.feature{background:var(--ink);color:var(--paper);border-radius:4px;padding:38px}
.feature h3{color:var(--paper);font-size:27px}
.feature p{color:rgba(245,243,238,.7);font-size:16px;margin-top:16px;line-height:1.6}
.feature .more{color:var(--paper);margin-top:26px}
.feature .more::after{background:rgba(245,243,238,.5)}
.showcase__cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.catalog{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.pcard{display:flex;flex-direction:column;background:transparent;transition:opacity .25s}
.pcard__top{order:2;padding-top:18px;display:flex;justify-content:space-between;align-items:flex-start;gap:14px;
  border-top:1px solid var(--line);margin-top:16px}
.pcard h3,.pcard h4{font-size:21px;font-weight:500}
.pcard .tagline{color:var(--steel);font-size:14.5px;margin-top:6px;font-family:var(--sans)}
.pcard__img{order:1;height:220px;overflow:hidden;background:var(--paper-2);border-radius:3px}
.pcard__img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.pcard:hover .pcard__img img{transform:scale(1.04)}
.pcard__img img.contain{object-fit:contain;background:#fff;padding:14px}
.pcard .chip{font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;
  color:var(--accent);white-space:nowrap;padding-top:3px}

/* filter bar */
.filterbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.filter{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  background:transparent;border:1px solid var(--line-2);color:var(--steel);
  padding:9px 16px;border-radius:999px;cursor:pointer;transition:.2s}
.filter:hover{border-color:var(--ink);color:var(--ink)}
.filter.active{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.catalog-status{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--steel-2);margin:0 0 30px}
.catalog-empty{display:none;text-align:center;color:var(--steel);padding:50px 0}

/* ===================== WHY (editorial numbered) ===================== */
.why__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-block:1px solid var(--line)}
.wc{background:var(--paper);padding:44px 34px}
.wc .no{font-family:var(--mono);font-size:13px;letter-spacing:.12em;color:var(--accent)}
.wc h3{font-size:23px;margin:20px 0 12px}
.wc p{color:var(--steel);font-size:16px;line-height:1.6}

/* ===================== APPLICATIONS (editorial list) ===================== */
.ind__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.ic{background:var(--paper);padding:40px 36px;display:flex;flex-direction:column;gap:14px}
.ic .ico{width:30px;height:30px;color:var(--accent)}
.ic h3{font-size:22px}
.ic p{color:var(--steel);font-size:16px;line-height:1.6}

/* ===================== PROCESS / STEPS (dark band) ===================== */
.proc{background:var(--ink);color:var(--paper)}
.proc .eyebrow{color:var(--accent-2)}
.proc .head h2{color:var(--paper)}
.proc .head p{color:rgba(245,243,238,.66)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(245,243,238,.14);border:1px solid rgba(245,243,238,.14)}
.step{background:var(--ink);padding:40px 32px}
.step .no{font-family:var(--mono);font-size:40px;font-weight:300;color:var(--accent-2);line-height:1}
.step h3{color:var(--paper);font-size:22px;margin:22px 0 12px}
.step p{color:rgba(245,243,238,.7);font-size:16px;line-height:1.6}

/* ===================== PROOF / figures ===================== */
.proof{background:var(--paper)}
.proof__grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.proof__grid>div{padding:36px 24px 0;border-right:1px solid var(--line)}
.proof__grid>div:last-child{border-right:0}
.proof .n{font-family:var(--serif);font-size:clamp(34px,3vw,46px);font-weight:500;color:var(--ink);line-height:1}
.proof .n b{font-weight:500;color:var(--accent)}
.proof .l{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--steel);margin-top:14px;line-height:1.5}

/* ===================== BLOG / INSIGHTS ===================== */
.blog__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.bc{background:var(--paper);display:flex;flex-direction:column;transition:background .3s}
.bc:hover{background:var(--card)}
.bc__img{height:200px;overflow:hidden;background:var(--paper-2) center/cover}
.bc__img img{width:100%;height:100%;object-fit:cover}
.bc__body{padding:28px}
.bc .tag{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.bc h3{font-size:23px;margin:14px 0 12px;line-height:1.2}
.bc p{color:var(--steel);font-size:15.5px;line-height:1.55}
.bc__more{margin-top:18px;display:inline-block}
.bc--soon{opacity:.6;cursor:default;position:relative}
.bc--soon:hover{background:var(--paper)}
.bc__soon{position:absolute;top:16px;right:16px;background:var(--ink);color:var(--paper);
  font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;padding:6px 11px;border-radius:999px}

/* ===================== CTA band ===================== */
.cta{background:var(--ink);color:var(--paper);border-radius:4px;padding:72px 64px;
  display:flex;justify-content:space-between;align-items:center;gap:40px;flex-wrap:wrap}
.cta h2{color:var(--paper);max-width:18ch}
.cta p{color:rgba(245,243,238,.7);margin-top:18px;max-width:50ch;font-size:18px}

/* ===================== PRODUCT HERO (.phero — editorial spec masthead) ===================== */
.phero{background:var(--paper);padding:140px 0 0}
.phero__in{max-width:var(--max);margin:0 auto;padding:0 var(--gut);
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.phero__copy .hero__brand{margin-bottom:22px}
.phero__copy h1{font-size:clamp(40px,4.6vw,62px)}
.phero__copy .hero__sub{margin-top:26px}
.phero__copy .hero__cta{margin-top:34px}
.phero__img{border-radius:4px;overflow:hidden;background:var(--paper-2);height:clamp(320px,38vw,480px)}
.phero__img img{width:100%;height:100%;object-fit:cover}
.phero__img img.contain{object-fit:contain;background:#fff;padding:26px}

/* split copy + media */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split__copy h2{margin-bottom:20px}
.split__copy h3{font-size:20px;margin:24px 0 10px}
.split__copy p{color:var(--steel);margin-top:14px;line-height:1.7}
.split__media{border-radius:4px;overflow:hidden;background:var(--paper-2)}
.split__media img{width:100%;height:100%;object-fit:cover}
.split__media img.contain{object-fit:contain;background:#fff;padding:24px}

/* ===================== SPEC DATA-SHEET (.specs) ===================== */
.specs__grid{display:grid;grid-template-columns:minmax(180px,260px) 1fr;border-top:1px solid var(--line)}
.specs__grid>.k{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--steel);padding:20px 24px 20px 0;border-bottom:1px solid var(--line)}
.specs__grid>.v{font-size:16.5px;line-height:1.6;color:var(--text);padding:20px 0 20px 24px;
  border-bottom:1px solid var(--line);border-left:1px solid var(--line)}

/* ===================== INQUIRY FORM ===================== */
.inquiry{background:var(--card);border:1px solid var(--line);border-radius:4px;padding:clamp(32px,4vw,56px)}
.inquiry__split{display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(36px,5vw,72px);align-items:start}
.inquiry h2{font-size:30px}
.inquiry__split>div>p{color:var(--steel);margin-top:16px}
.form-hint{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--steel-2);margin-bottom:18px}
.form label{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);margin-bottom:8px}
.form input,.form textarea{width:100%;font-family:var(--sans);font-size:15px;color:var(--ink);
  background:var(--paper);border:1px solid var(--line-2);border-radius:3px;padding:13px 15px;transition:border-color .2s}
.form input::placeholder,.form textarea::placeholder{color:var(--steel-2)}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--accent)}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form p{margin:0 0 16px}
.form .req{color:var(--accent)}
.form .note{font-family:var(--mono);font-size:11px;letter-spacing:.03em;color:var(--steel-2);margin-top:4px;line-height:1.6}
.form button{margin-top:4px}

/* ===================== misc content blocks ===================== */
.callout{background:var(--paper-2);border-left:2px solid var(--accent);border-radius:0 4px 4px 0;
  padding:24px 28px;margin:30px 0;font-size:17px;line-height:1.65}
.callout a{color:var(--accent);font-weight:600;border-bottom:1px solid var(--accent)}
.checklist{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.checklist li{position:relative;padding-left:30px;color:var(--text);line-height:1.55}
.checklist li::before{content:"—";position:absolute;left:0;color:var(--accent);font-family:var(--mono)}
.related{display:flex;flex-wrap:wrap;gap:12px}
.related a{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;
  border:1px solid var(--line-2);border-radius:999px;padding:11px 20px;color:var(--ink);transition:.2s;display:inline-flex;gap:8px;align-items:center}
.related a:hover{border-color:var(--accent);color:var(--accent)}
.related .arw{color:var(--accent)}

/* article (blog detail) */
.article{font-size:18.5px;line-height:1.75}
.article-back{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);display:inline-block;margin-bottom:26px}
.article .eyebrow{display:block;margin-bottom:14px}
.article h1{font-size:clamp(34px,4vw,54px);margin-bottom:18px}
.article-byline{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--steel-2);margin-bottom:34px}
.article h2{font-size:30px;margin:46px 0 16px}
.article h3{font-size:22px;margin:32px 0 12px}
.article p{margin:18px 0;color:var(--text)}
.article ul.checklist{margin:24px 0}

/* ===================== FOOTER ===================== */
.foot{background:var(--ink);color:var(--paper);padding:84px 0 36px}
.foot__top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr 1fr;gap:40px;padding-bottom:54px;border-bottom:1px solid rgba(245,243,238,.14)}
.foot__brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.foot__brand img{height:32px;width:auto}
.foot__brand .fwm{display:flex;flex-direction:column;line-height:1}
.foot__brand .fwm b{font-family:var(--serif);font-weight:600;font-size:20px;color:var(--paper)}
.foot__brand .fwm small{font-family:var(--mono);font-size:8.5px;font-weight:500;letter-spacing:.24em;text-transform:uppercase;color:rgba(245,243,238,.55);margin-top:4px}
.foot__top>div>p{color:rgba(245,243,238,.62);font-size:15.5px;line-height:1.65;max-width:42ch}
.foot__h{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:rgba(245,243,238,.5);margin:0 0 20px}
.foot__top ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:13px}
.foot__top a,.foot__top li{color:rgba(245,243,238,.82);font-size:15px}
.foot__top a:hover{color:var(--accent-2)}
.foot__bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-top:28px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:rgba(245,243,238,.5)}

/* sticky quote fab */
.fab{position:fixed;right:26px;bottom:26px;z-index:40;display:inline-flex;align-items:center;gap:9px;
  background:var(--accent);color:#fff;font-family:var(--sans);font-weight:600;font-size:14px;
  padding:14px 22px;border-radius:3px;box-shadow:0 14px 40px rgba(28,27,24,.22);transition:background .25s,transform .25s}
.fab:hover{background:var(--ink);transform:translateY(-2px)}
.fab svg{width:17px;height:17px}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:12px 18px;z-index:100}
.skip-link:focus{left:12px;top:12px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ===================== reveal ===================== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease) var(--rd,0ms),transform .8s var(--ease) var(--rd,0ms)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1!important;transform:none!important}}
html.shot .reveal{opacity:1;transform:none}

/* ===================== RESPONSIVE ===================== */
@media(max-width:980px){
  :root{--gut:24px}
  .hero__in,.phero__in,.split,.inquiry__split{grid-template-columns:1fr;gap:36px}
  .hero{padding-top:120px}
  .hero__bg{min-height:300px}
  .hero__statgrid{grid-template-columns:repeat(2,1fr)}
  .hero__stats .col:nth-child(2){border-right:0}
  .hero__stats .col{border-bottom:1px solid var(--line);padding-bottom:24px}
  .grades__grid,.showcase__cards,.catalog,.why__grid,.steps,.blog__grid,.lookbook{grid-template-columns:1fr}
  .lcard,.lcard--wide{grid-column:span 1}
  .ind__grid,.proof__grid{grid-template-columns:repeat(2,1fr)}
  .showcase{grid-template-columns:1fr}
  .foot__top{grid-template-columns:1fr 1fr}
  .section{padding:84px 0}
  .gcard{border-right:0;border-bottom:1px solid var(--line)}
}
@media(max-width:640px){
  body{font-size:17px}
  .nav__links{display:none}
  .nav__burger{display:flex}
  .proof__grid,.ind__grid{grid-template-columns:1fr}
  .proof__grid>div{border-right:0;border-bottom:1px solid var(--line);padding-bottom:24px}
  .form .row2{grid-template-columns:1fr}
  .cta{padding:48px 32px}
  .specs__grid{grid-template-columns:1fr}
  .specs__grid>.v{border-left:0;padding-left:0}
  .hero__statgrid{grid-template-columns:1fr 1fr}
}

/* ===================== FAQ (visible Q&A matching FAQPage schema) ===================== */
.faq{border-top:1px solid var(--line)}
.faq__item{border-bottom:1px solid var(--line);padding:28px 0;display:grid;grid-template-columns:1fr;gap:10px}
.faq__q{font-family:var(--serif);font-weight:500;font-size:22px;margin:0;line-height:1.2}
.faq__a{color:var(--steel);font-size:16.5px;line-height:1.65;margin:0;max-width:78ch}

/* ===================== DATA TABLE (reference hubs: composition, sizes, standards) ===================== */
.dtable-wrap{overflow-x:auto;margin:10px 0 4px;border:1px solid var(--line);border-radius:4px}
.dtable{width:100%;border-collapse:collapse;font-size:15.5px;min-width:520px}
.dtable thead th{font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;
  color:var(--steel);text-align:left;padding:14px 18px;background:var(--paper-2);border-bottom:1px solid var(--line-2)}
.dtable td{padding:13px 18px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5;color:var(--text)}
.dtable tbody tr:last-child td{border-bottom:0}
.dtable tbody tr:hover{background:var(--card)}
.dtable td:first-child{font-weight:600}
.dtable .num,.dtable td.num{font-family:var(--mono);font-size:14px;white-space:nowrap}
.dtable caption{caption-side:bottom;text-align:left;font-family:var(--mono);font-size:11px;color:var(--steel-2);padding:12px 2px 0;letter-spacing:.02em}