/* ============================================================
   SG || TECH — Design tokens
   ============================================================ */
:root{
  /* Color */
  --teal-950:#081F1C;
  --teal-900:#0B322E;
  --teal-800:#0D3B36;
  --teal-700:#134B44;
  --teal-600:#1B655A;
  --teal-500:#277E70;
  --cream-300:#E7DBB6;
  --cream-100:#F2ECDA;
  --paper:#F8F6EF;
  --ink:#0B1F1C;
  --ink-soft:#3B4C48;
  --alert:#C1573D;
  --line:rgba(231,219,182,0.18);
  --line-dark:rgba(11,31,28,0.12);

  /* Type */
  --f-display:'Space Grotesk', sans-serif;
  --f-body:'IBM Plex Sans', sans-serif;
  --f-mono:'IBM Plex Mono', monospace;

  --container:1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}

h1,h2,h3,h4{
  font-family:var(--f-display);
  font-weight:600;
  letter-spacing:-0.01em;
  margin:0 0 0.5em;
  color:var(--ink);
}
h1{font-size:clamp(2.6rem,5vw,4.6rem); line-height:1.02; letter-spacing:-0.02em;}
h2{font-size:clamp(1.9rem,3.2vw,2.8rem); line-height:1.08;}
h3{font-size:1.3rem; line-height:1.25;}
p{margin:0 0 1em; color:var(--ink-soft);}

.eyebrow{
  font-family:var(--f-mono);
  font-size:0.78rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--teal-600);
  display:flex;
  align-items:center;
  gap:0.6em;
  margin-bottom:1.1em;
}
.eyebrow::before{
  content:"";
  width:22px; height:1px;
  background:var(--teal-500);
  display:inline-block;
}
section.on-dark .eyebrow, section.on-deep .eyebrow, .hero .eyebrow, .cta-band .eyebrow{color:var(--cream-300);}
section.on-dark .eyebrow::before, section.on-deep .eyebrow::before, .hero .eyebrow::before, .cta-band .eyebrow::before{background:var(--cream-300);}

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:0.5em;
  font-family:var(--f-mono);
  font-size:0.82rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  padding:0.95em 1.5em;
  border-radius:2px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn:focus-visible{outline:2px solid var(--teal-500); outline-offset:3px;}

.btn-primary{background:var(--cream-300); color:var(--teal-950); border-color:var(--cream-300);}
.btn-primary:hover{background:var(--paper);}

.btn-line{background:transparent; color:var(--cream-100); border-color:var(--line);}
.btn-line:hover{border-color:var(--cream-300); color:var(--cream-300);}

.btn-dark{background:var(--teal-900); color:var(--cream-100); border-color:var(--teal-900);}
.btn-dark:hover{background:var(--teal-800);}

.btn-line-dark{background:transparent; color:var(--teal-900); border-color:var(--line-dark);}
.btn-line-dark:hover{border-color:var(--teal-600); color:var(--teal-700);}

/* ============================================================
   Logo mark
   ============================================================ */
.logo-mark{width:22px; height:22px; flex-shrink:0;}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--f-display);
  font-weight:600;
  font-size:1.05rem;
  letter-spacing:0.01em;
  color:var(--cream-100);
}
.logo .div{opacity:0.55; margin:0 2px; font-weight:400;}
.logo small{
  display:block;
  font-family:var(--f-mono);
  font-size:0.58rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--cream-300);
  opacity:0.7;
  margin-top:2px;
  font-weight:400;
}

/* ============================================================
   Header / Nav
   ============================================================ */
header.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(8,31,28,0.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 32px;
  max-width:var(--container);
  margin:0 auto;
}
nav.primary-nav ul{
  display:flex; gap:2.4rem; list-style:none; margin:0; padding:0;
}
nav.primary-nav a{
  font-family:var(--f-mono);
  font-size:0.8rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--cream-100);
  opacity:0.72;
  position:relative;
  padding-bottom:4px;
}
nav.primary-nav a:hover{opacity:1;}
nav.primary-nav a.active{opacity:1;}
nav.primary-nav a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-6px; height:2px; background:var(--cream-300);
}
.nav-actions{display:flex; align-items:center; gap:1.4rem;}
.nav-toggle{
  display:none;
  background:none; border:none; cursor:pointer;
  width:32px; height:24px; position:relative;
}
.nav-toggle span{
  position:absolute; left:0; right:0; height:2px; background:var(--cream-100);
  transition:transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle span:nth-child(1){top:2px;}
.nav-toggle span:nth-child(2){top:11px;}
.nav-toggle span:nth-child(3){top:20px;}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(9px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-9px) rotate(-45deg);}

@media (max-width:860px){
  nav.primary-nav{
    position:fixed; inset:64px 0 0 0; background:var(--teal-950);
    display:flex; align-items:flex-start; justify-content:center; padding-top:60px;
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:opacity 0.22s ease, transform 0.22s ease;
  }
  body.nav-open nav.primary-nav{opacity:1; transform:translateY(0); pointer-events:auto;}
  nav.primary-nav ul{flex-direction:column; align-items:center; gap:2rem;}
  nav.primary-nav a{font-size:1rem;}
  .nav-toggle{display:block;}
  .nav-actions .btn{display:none;}
}

/* ============================================================
   Sections — dark / light rhythm
   ============================================================ */
section{padding:110px 0;}
section.on-dark{background:var(--teal-900); color:var(--cream-100);}
section.on-dark h1,section.on-dark h2,section.on-dark h3{color:var(--cream-100);}
section.on-dark p{color:rgba(242,236,218,0.72);}
section.on-deep{background:var(--teal-950); color:var(--cream-100);}
section.on-deep h1,section.on-deep h2,section.on-deep h3{color:var(--cream-100);}
section.on-deep p{color:rgba(242,236,218,0.68);}
section.on-cream{background:var(--cream-100);}
section.on-paper{background:var(--paper);}

.section-head{max-width:640px; margin-bottom:56px;}
.section-head.center{margin-left:auto; margin-right:auto; text-align:center;}

hr.rule{border:none; border-top:1px solid var(--line-dark); margin:0;}
section.on-dark hr.rule, section.on-deep hr.rule{border-top:1px solid var(--line);}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  padding:90px 0 60px;
  background:
    radial-gradient(1200px 600px at 88% -10%, rgba(231,219,182,0.10), transparent 60%),
    linear-gradient(155deg, var(--teal-950) 0%, var(--teal-900) 46%, var(--teal-800) 100%);
  color:var(--cream-100);
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:64px;
  align-items:center;
}
.hero h1{margin-bottom:0.4em; color:var(--cream-100);}
.hero h1 em{font-style:normal; color:var(--cream-300);}
.hero p{color:rgba(242,236,218,0.76);}
.hero p.lede{
  font-size:1.12rem; max-width:44ch;
}
.hero-ctas{display:flex; gap:14px; margin-top:2.2em; flex-wrap:wrap;}
.hero-stats{
  display:flex; gap:40px; margin-top:64px; padding-top:32px;
  border-top:1px solid var(--line); flex-wrap:wrap;
}
.hero-stats .stat b{
  display:block; font-family:var(--f-display); font-size:1.9rem; color:var(--cream-100);
}
.hero-stats .stat span{
  font-family:var(--f-mono); font-size:0.72rem; letter-spacing:0.08em; text-transform:uppercase;
  color:rgba(242,236,218,0.55);
}

/* Stack visual — signature element */
.stackviz{
  position:relative;
  display:flex; flex-direction:column-reverse; gap:10px;
  padding:20px 0;
}
.stackviz .band{
  position:relative;
  border:1px solid var(--line);
  background:rgba(231,219,182,0.03);
  border-radius:3px;
  padding:16px 22px;
  opacity:0; transform:translateY(16px);
  transition:opacity 0.6s ease, transform 0.6s ease, background 0.25s ease, border-color 0.25s ease;
  cursor:default;
}
.stackviz .band.in{opacity:1; transform:translateY(0);}
.stackviz .band:hover, .stackviz .band:focus-within{
  background:rgba(231,219,182,0.08);
  border-color:var(--cream-300);
}
.stackviz .band-row{display:flex; align-items:baseline; justify-content:space-between; gap:12px;}
.stackviz .band-name{font-family:var(--f-mono); font-size:0.86rem; letter-spacing:0.05em; text-transform:uppercase; color:var(--cream-100);}
.stackviz .band-index{font-family:var(--f-mono); font-size:0.72rem; color:var(--cream-300); opacity:0.55;}
.stackviz .band-desc{
  font-family:var(--f-body); font-size:0.86rem; color:rgba(242,236,218,0.6);
  margin-top:6px; max-width:38ch;
}
.stackviz .band:nth-child(1){width:100%;}
.stackviz .band:nth-child(2){width:92%;}
.stackviz .band:nth-child(3){width:84%;}
.stackviz .band:nth-child(4){width:76%;}
.stackviz .band:nth-child(5){width:68%;}
.stackviz-caption{
  font-family:var(--f-mono); font-size:0.72rem; letter-spacing:0.08em; text-transform:uppercase;
  color:rgba(242,236,218,0.45); margin-top:18px;
}

@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr; gap:48px;}
  .stackviz .band, .stackviz .band:nth-child(2), .stackviz .band:nth-child(3), .stackviz .band:nth-child(4), .stackviz .band:nth-child(5){width:100%;}
}

/* ============================================================
   Trust bar
   ============================================================ */
.trustbar{
  background:var(--cream-100);
  padding:26px 0;
  border-bottom:1px solid var(--line-dark);
}
.trustbar .row{
  display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap;
}
.trustbar span{
  font-family:var(--f-mono); font-size:0.78rem; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--ink-soft);
}
.trustbar .marks{display:flex; gap:32px; flex-wrap:wrap;}
.trustbar .marks b{font-family:var(--f-display); font-weight:600; color:var(--teal-800); font-size:0.95rem;}

/* ============================================================
   Pillars (innovation / integrity / growth)
   ============================================================ */
.pillars{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line-dark); border:1px solid var(--line-dark);}
.pillar{background:var(--paper); padding:44px 36px;}
.pillar .num{font-family:var(--f-mono); font-size:0.78rem; color:var(--teal-600); margin-bottom:1.4em; display:block;}
.pillar h3{margin-bottom:0.5em;}
@media (max-width:760px){.pillars{grid-template-columns:1fr;}}

/* ============================================================
   Card grids
   ============================================================ */
.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line-dark); border:1px solid var(--line-dark);}
.grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line-dark); border:1px solid var(--line-dark);}
@media (max-width:860px){.grid-3{grid-template-columns:1fr;} .grid-2{grid-template-columns:1fr;}}

.card{background:var(--paper); padding:40px 34px; transition:background 0.2s ease;}
.card:hover{background:var(--cream-100);}
.card .tag{font-family:var(--f-mono); font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase; color:var(--teal-600); display:block; margin-bottom:1.2em;}
.card h3{margin-bottom:0.6em;}
.card p{margin-bottom:0;}
.card ul{margin:1em 0 0; padding:0 0 0 1.1em; color:var(--ink-soft); font-size:0.94rem;}
.card ul li{margin-bottom:0.4em;}

section.on-dark .card, section.on-deep .card{background:var(--teal-900); }
section.on-dark .card:hover, section.on-deep .card:hover{background:var(--teal-800);}
section.on-dark .card .tag, section.on-deep .card .tag{color:var(--cream-300);}
section.on-dark .grid-3, section.on-deep .grid-3,
section.on-dark .grid-2, section.on-deep .grid-2{background:var(--line); border-color:var(--line);}

/* ============================================================
   Services detail rows (services.html)
   ============================================================ */
.service-row{
  display:grid; grid-template-columns:120px 1fr 1fr; gap:40px;
  padding:48px 0; border-top:1px solid var(--line-dark);
  align-items:start;
}
.service-row:last-child{border-bottom:1px solid var(--line-dark);}
.service-row .idx{font-family:var(--f-mono); font-size:0.85rem; color:var(--teal-600);}
.service-row h3{margin-bottom:0.5em;}
.service-row ul{list-style:none; margin:0; padding:0; font-family:var(--f-mono); font-size:0.8rem; color:var(--ink-soft);}
.service-row ul li{padding:6px 0; border-top:1px solid var(--line-dark);}
.service-row ul li:first-child{border-top:none;}
@media (max-width:860px){
  .service-row{grid-template-columns:1fr; gap:14px;}
}

/* ============================================================
   Process / approach steps
   ============================================================ */
.steps{display:grid; grid-template-columns:repeat(4,1fr); gap:28px;}
.step{padding-top:20px; border-top:1px solid var(--line);}
.step .idx{font-family:var(--f-mono); font-size:0.78rem; color:var(--cream-300); opacity:0.7;}
.step h4{font-family:var(--f-display); font-size:1.05rem; margin:0.6em 0 0.4em; color:var(--cream-100);}
.step p{font-size:0.92rem;}
@media (max-width:860px){.steps{grid-template-columns:1fr 1fr;}}
@media (max-width:560px){.steps{grid-template-columns:1fr;}}

/* ============================================================
   Timeline (about.html)
   ============================================================ */
.timeline{border-top:1px solid var(--line-dark);}
.tl-row{
  display:grid; grid-template-columns:140px 1fr; gap:32px;
  padding:30px 0; border-bottom:1px solid var(--line-dark);
}
.tl-row .yr{font-family:var(--f-mono); color:var(--teal-600); font-size:0.9rem;}
.tl-row h4{margin:0 0 0.3em; font-size:1.05rem;}
.tl-row p{margin:0; font-size:0.94rem;}
@media (max-width:600px){.tl-row{grid-template-columns:1fr; gap:8px;}}

/* ============================================================
   CTA band
   ============================================================ */
.cta-band{
  background:var(--teal-950);
  color:var(--cream-100);
  padding:90px 0;
  text-align:center;
}
.cta-band h2{max-width:20ch; margin:0 auto 0.4em; color:var(--cream-100);}
.cta-band p{max-width:46ch; margin:0 auto 1.6em; color:rgba(242,236,218,0.72);}
.cta-band .hero-ctas{justify-content:center;}
.cta-band .eyebrow{justify-content:center;}

/* ============================================================
   Contact page
   ============================================================ */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:70px; align-items:start;}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr; gap:48px;}}

.field{margin-bottom:22px;}
.field label{
  display:block; font-family:var(--f-mono); font-size:0.72rem; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--ink-soft); margin-bottom:8px;
}
.field input, .field textarea, .field select{
  width:100%; background:transparent; border:none; border-bottom:1px solid var(--line-dark);
  padding:10px 2px; font-family:var(--f-body); font-size:1rem; color:var(--ink);
  border-radius:0;
}
.field textarea{resize:vertical; min-height:100px;}
.field input:focus, .field textarea:focus, .field select:focus{
  outline:none; border-bottom-color:var(--teal-700);
}
.contact-info dt{font-family:var(--f-mono); font-size:0.72rem; letter-spacing:0.08em; text-transform:uppercase; color:var(--teal-600); margin-top:1.6em;}
.contact-info dd{margin:0.3em 0 0; font-size:1.02rem; color:var(--ink);}
.contact-info dl{margin:0;}

/* ============================================================
   Footer
   ============================================================ */
footer.site-footer{
  background:var(--teal-950); color:rgba(242,236,218,0.6);
  padding:64px 0 32px;
}
.footer-top{
  display:flex; justify-content:space-between; gap:40px; flex-wrap:wrap;
  padding-bottom:48px; border-bottom:1px solid var(--line);
}
.footer-cols{display:flex; gap:70px; flex-wrap:wrap;}
.footer-col h5{
  font-family:var(--f-mono); font-size:0.72rem; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--cream-300); margin:0 0 1.2em;
}
.footer-col ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:0.7em;}
.footer-col a{font-size:0.92rem; color:rgba(242,236,218,0.7);}
.footer-col a:hover{color:var(--cream-100);}
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; gap:16px; flex-wrap:wrap;
  padding-top:26px; font-family:var(--f-mono); font-size:0.72rem; letter-spacing:0.04em; color:rgba(242,236,218,0.45);
}

/* ============================================================
   Reveal-on-scroll
   ============================================================ */
.reveal{opacity:0; transform:translateY(18px); transition:opacity 0.7s ease, transform 0.7s ease;}
.reveal.in{opacity:1; transform:translateY(0);}