/* =========================================================
   K.T. MARBLE — shared stylesheet
   Theme: charcoal stone + brass vein-gold accent
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Prompt:wght@400;500;600;700&family=Sarabun:wght@300;400;500;600&display=swap');

:root{
  --bg-950:#131315;
  --bg-900:#1a1a1d;
  --bg-850:#202023;
  --bg-800:#26262a;
  --bg-700:#333337;
  --line:#38383c;
  --line-soft:#2c2c30;
  --ink:#ECE7DE;
  --ink-dim:#A9A39A;
  --ink-faint:#726d66;
  --gold:#C6A15C;
  --gold-soft:#E4C98D;
  --gold-deep:#8C7038;
  --gold-glow: rgba(198,161,92,0.35);
  --radius:2px;
  --maxw:1180px;
  --shadow-lg: 0 30px 60px -20px rgba(0,0,0,0.6);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-950);
  color:var(--ink);
  font-family:'Sarabun', 'Prompt', sans-serif;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{
  font-family:'Prompt','Sarabun',sans-serif;
  font-weight:600;
  line-height:1.3;
  margin:0 0 .6em;
  color:var(--ink);
  letter-spacing:.01em;
}
p{margin:0 0 1.1em;color:var(--ink-dim);}
.container{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
::selection{background:var(--gold-deep);color:var(--bg-950);}

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

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important;}
}

/* ---------- eyebrow / labels ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:'Prompt',sans-serif;
  font-size:12.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold-soft);
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:var(--gold);
  display:inline-block;
}

/* ---------- vein divider signature ---------- */
.vein-divider{
  width:100%;
  height:34px;
  display:block;
  color:var(--gold);
  opacity:.55;
}
.vein-divider.flip{transform:scaleY(-1);}
.vein-wrap{
  width:100%;
  overflow:hidden;
  line-height:0;
}

/* ---------- top navigation ---------- */
header.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(19,19,21,0.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:16px 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;
  flex-direction:column;
  line-height:1.1;
}
.brand .mark{
  font-family:'Prompt',sans-serif;
  font-weight:700;
  font-size:20px;
  letter-spacing:.08em;
  color:var(--ink);
}
.brand .mark span{color:var(--gold);}
.brand .sub{
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--ink-faint);
  text-transform:uppercase;
  margin-top:3px;
}
nav.main-nav{
  display:flex;
  align-items:center;
  gap:34px;
}
nav.main-nav a{
  font-family:'Prompt',sans-serif;
  font-size:14.5px;
  color:var(--ink-dim);
  position:relative;
  padding:6px 0;
  transition:color .2s ease;
}
nav.main-nav a:hover{color:var(--ink);}
nav.main-nav a.active{color:var(--gold-soft);}
nav.main-nav a.active::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--gold);
}
.nav-cta{
  font-family:'Prompt',sans-serif;
  font-size:13.5px;
  font-weight:500;
  color:var(--bg-950) !important;
  background:var(--gold);
  padding:10px 20px;
  border-radius:var(--radius);
  letter-spacing:.02em;
  transition:background .2s ease, transform .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--gold-soft); transform:translateY(-1px);}

.nav-toggle{
  display:none;
  background:none;
  border:1px solid var(--line);
  border-radius:var(--radius);
  width:42px;height:38px;
  align-items:center;justify-content:center;
  cursor:pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:"";
  display:block;
  width:18px;height:1.5px;
  background:var(--ink);
  position:relative;
  transition:.2s;
}
.nav-toggle span::before{position:absolute;top:-6px;}
.nav-toggle span::after{position:absolute;top:6px;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:88vh;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.hero-media{
  position:absolute;inset:0;
  z-index:0;
}
.hero-media img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.85) brightness(.62);
}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(180deg, rgba(19,19,21,.35) 0%, rgba(19,19,21,.35) 40%, rgba(19,19,21,.96) 100%),
    linear-gradient(90deg, rgba(19,19,21,.75) 0%, rgba(19,19,21,.15) 55%);
}
.hero-content{
  position:relative;
  z-index:1;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 28px 84px;
  width:100%;
}
.hero-content h1{
  font-size:clamp(34px,5.4vw,64px);
  max-width:820px;
  margin-bottom:22px;
}
.hero-content h1 em{
  font-style:normal;
  color:var(--gold-soft);
}
.hero-content .lead{
  max-width:560px;
  font-size:17px;
  color:#D9D3C8;
}
.hero-actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-top:28px;
}

/* ---------- buttons ---------- */
.btn{
  font-family:'Prompt',sans-serif;
  font-size:14.5px;
  font-weight:500;
  padding:14px 26px;
  border-radius:var(--radius);
  display:inline-flex;
  align-items:center;
  gap:10px;
  transition:all .2s ease;
  border:1px solid transparent;
  cursor:pointer;
}
.btn-gold{
  background:var(--gold);
  color:var(--bg-950);
}
.btn-gold:hover{background:var(--gold-soft); transform:translateY(-1px);}
.btn-ghost{
  border-color:var(--line);
  color:var(--ink);
  background:transparent;
}
.btn-ghost:hover{border-color:var(--gold); color:var(--gold-soft);}

/* ---------- section shells ---------- */
section{padding:96px 0;}
section.tight{padding:64px 0;}
.section-head{
  max-width:640px;
  margin-bottom:56px;
}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.on-dark{background:var(--bg-950);}
.on-panel{background:var(--bg-900);}
.on-deep{background:var(--bg-850);}

/* ---------- intro strip ---------- */
.intro-grid{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:64px;
  align-items:center;
}
.intro-grid figure{margin:0; position:relative;}
.intro-grid figure img{border-radius:var(--radius); width:100%; height:420px; object-fit:cover;}
.intro-grid figure::before{
  content:"";
  position:absolute; inset:-14px -14px auto auto;
  width:120px;height:120px;
  border-top:1px solid var(--gold-deep);
  border-right:1px solid var(--gold-deep);
  z-index:-1;
}
.stat-row{
  display:flex;
  gap:40px;
  margin-top:32px;
  flex-wrap:wrap;
}
.stat-row .stat b{
  display:block;
  font-family:'Prompt',sans-serif;
  font-size:26px;
  color:var(--gold-soft);
  font-weight:600;
}
.stat-row .stat span{
  font-size:12.5px;
  color:var(--ink-faint);
  letter-spacing:.04em;
}

/* ---------- service cards ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
}
.card-grid.cols-2{grid-template-columns:repeat(2,1fr);}
.card-grid.cols-3{grid-template-columns:repeat(3,1fr);}
.service-card{
  background:var(--bg-900);
  padding:38px 30px;
  position:relative;
  transition:background .25s ease;
}
.service-card:hover{background:var(--bg-850);}
.service-card .num{
  font-family:'Prompt',sans-serif;
  color:var(--gold-deep);
  font-size:13px;
  letter-spacing:.1em;
  margin-bottom:22px;
  display:block;
}
.service-card h3{font-size:19px;margin-bottom:12px;}
.service-card p{font-size:14.5px;margin-bottom:0;}

/* ---------- material gallery ---------- */
.mat-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:2px;
}
.mat-tile{
  position:relative;
  aspect-ratio:3/4;
  overflow:hidden;
}
.mat-tile img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s ease, filter .5s ease;
  filter:saturate(.9) brightness(.75);
}
.mat-tile:hover img{transform:scale(1.06); filter:saturate(1) brightness(.85);}
.mat-tile .tag{
  position:absolute; left:0; right:0; bottom:0;
  padding:20px 18px;
  background:linear-gradient(0deg, rgba(19,19,21,.92), transparent);
}
.mat-tile .tag b{
  font-family:'Prompt',sans-serif;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  display:block;
}
.mat-tile .tag span{
  font-size:11.5px;
  color:var(--gold-soft);
  letter-spacing:.05em;
}

/* ---------- process ---------- */
.process-list{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:44px;
}
.process-step{position:relative;padding-left:2px;}
.process-step .idx{
  font-family:'Prompt',sans-serif;
  font-size:44px;
  font-weight:700;
  color:transparent;
  -webkit-text-stroke:1px var(--gold-deep);
  display:block;
  margin-bottom:18px;
}
.process-step h3{font-size:18px;}
.process-step p{font-size:14.5px;}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;
  padding:80px 0;
  background:var(--bg-900);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-inner h2{margin-bottom:8px;font-size:clamp(24px,3vw,34px);}
.cta-inner p{margin-bottom:0;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- contact cards ---------- */
.contact-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
}
.contact-card{
  background:var(--bg-900);
  padding:32px 26px;
}
.contact-card .k-label{
  font-family:'Prompt',sans-serif;
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--gold-soft);
  margin-bottom:14px;
  display:block;
}
.contact-card a, .contact-card .val{
  font-family:'Prompt',sans-serif;
  font-size:16.5px;
  color:var(--ink);
  display:block;
  margin-bottom:4px;
}
.contact-card a:hover{color:var(--gold-soft);}

.map-embed{
  width:100%;
  height:420px;
  border:0;
  filter:grayscale(.4) invert(.92) contrast(.9);
  border:1px solid var(--line-soft);
}

/* ---------- policy content ---------- */
.policy-body h2{
  font-size:20px;
  margin-top:2.2em;
  color:var(--gold-soft);
}
.policy-body h2:first-child{margin-top:0;}
.policy-body ul{
  color:var(--ink-dim);
  padding-left:1.2em;
}
.policy-body li{margin-bottom:.5em;}
.policy-meta{
  font-family:'Prompt',sans-serif;
  font-size:13px;
  color:var(--ink-faint);
  letter-spacing:.03em;
  margin-bottom:2.4em;
  padding-bottom:24px;
  border-bottom:1px solid var(--line-soft);
}

/* ---------- footer ---------- */
footer.site-footer{
  background:var(--bg-950);
  border-top:1px solid var(--line-soft);
  padding-top:72px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-grid h4{
  font-family:'Prompt',sans-serif;
  font-size:13px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:18px;
}
.footer-grid ul{list-style:none;margin:0;padding:0;}
.footer-grid li{margin-bottom:11px;}
.footer-grid a{color:var(--ink-dim); font-size:14.5px;}
.footer-grid a:hover{color:var(--gold-soft);}
.footer-brand .mark{font-size:20px;margin-bottom:14px;}
.footer-brand p{font-size:14px; max-width:280px;}
.footer-bottom{
  border-top:1px solid var(--line-soft);
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  font-size:12.5px;
  color:var(--ink-faint);
}
.footer-bottom a{color:var(--ink-faint);}
.footer-bottom a:hover{color:var(--gold-soft);}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0; transform:translateY(18px); transition:opacity .7s ease, transform .7s ease;}
.reveal.in{opacity:1; transform:translateY(0);}

/* ---------- page hero (inner pages) ---------- */
.page-hero{
  position:relative;
  padding:150px 0 76px;
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.page-hero-media{position:absolute;inset:0;z-index:0;}
.page-hero-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.7) brightness(.4);}
.page-hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(19,19,21,.55), rgba(19,19,21,.97));
}
.page-hero-content{position:relative;z-index:1;max-width:720px;}
.page-hero-content h1{font-size:clamp(30px,4.4vw,46px);margin-bottom:14px;}
.page-hero-content p{font-size:16px;max-width:560px;}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .intro-grid{grid-template-columns:1fr; gap:36px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .mat-grid{grid-template-columns:repeat(2,1fr);}
  .process-list{grid-template-columns:1fr; gap:32px;}
  .contact-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr; row-gap:36px;}
}
@media (max-width:720px){
  nav.main-nav{
    position:fixed; top:65px; left:0; right:0;
    background:var(--bg-900);
    border-bottom:1px solid var(--line-soft);
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:8px 28px 20px;
    transform:translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
  }
  nav.main-nav.open{opacity:1; transform:translateY(0); pointer-events:auto;}
  nav.main-nav a{padding:12px 0; width:100%; border-bottom:1px solid var(--line-soft);}
  nav.main-nav .nav-cta{margin-top:14px;}
  .nav-toggle{display:flex;}
  .card-grid{grid-template-columns:1fr;}
  .mat-grid{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column; align-items:flex-start;}
  section{padding:64px 0;}
}