/* ==========================================================================
   Elite Steel Detailing & Engineering Services — design system
   Palette: charcoal #474B4E, charcoal-deep #34373A, copper #E77E0D, bg #F7F8FA
   Type: Inter — signature motif: technical "dimension line" divider
   ========================================================================== */

:root{
  --navy:#474B4E;
  --navy-deep:#34373A;
  --charcoal:#2B2F33;
  --copper:#E77E0D;
  --copper-light:#F2A254;
  --bg:#F7F8FA;
  --white:#FFFFFF;
  --line:#E3E6EA;
  --text:#2B2F33;
  --text-dim:#606870;
  --text-inv:#C9D2DA;
  --radius:3px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.01ms !important;transition-duration:0.01ms !important;}
}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
h1,h2,h3,h4{font-weight:700;color:var(--navy);letter-spacing:-0.01em;line-height:1.15;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:700;
  font-family:'Playfair Display',Georgia,'Times New Roman',serif;
  color:var(--copper);text-transform:uppercase;letter-spacing:0.12em;margin-bottom:14px;
}

/* Signature element: dimension line (technical drawing tick marks) */
.dim-line{
  display:flex;align-items:center;gap:6px;height:20px;
  color:var(--line);
}
.dim-line::before,.dim-line::after{content:'';flex:1;height:1px;background:var(--line);}
.dim-line span{
  font-family:'Inter',monospace;font-size:11px;letter-spacing:0.1em;color:#9AA1A8;white-space:nowrap;
}
.dim-divider{
  height:1px;background:
    repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 14px);
  margin:0;
}

/* ---------- Header ---------- */
header.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.97);
  backdrop-filter:blur(6px);border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px;}
.brand{display:flex;align-items:center;gap:10px;line-height:1.1;}
.brand img{height:42px;width:auto;flex-shrink:0;}
.brand .b-text{display:flex;flex-direction:column;}
.brand .b-main{font-size:17px;font-weight:800;color:var(--navy);letter-spacing:0.01em;}
.brand .b-main span{color:var(--copper);}
.brand .b-sub{font-size:9.5px;letter-spacing:0.16em;color:var(--text-dim);text-transform:uppercase;margin-top:2px;}
.nav-links{display:flex;gap:24px;flex-shrink:1;min-width:0;flex-wrap:nowrap;}
.nav-links a{
  font-size:13.5px;font-weight:500;color:var(--charcoal);position:relative;padding:6px 0;
  transition:color .2s ease;
}
.nav-links a:hover,.nav-links a.active{color:var(--copper);}
.nav-links a.active::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--copper);}
.nav-actions{display:flex;align-items:center;gap:16px;flex-shrink:0;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;font-size:13.5px;font-weight:600;border-radius:var(--radius);
  letter-spacing:0.02em;transition:all .2s ease;cursor:pointer;border:none;
  white-space:nowrap;
}
.btn-phone{padding:10px 16px;font-size:13px;}
@media(max-width:1300px){
  .nav-actions .btn-phone{display:none;}
}
.btn-primary{background:var(--copper);color:var(--white);}
.btn-primary:hover{background:var(--navy);}
.btn-outline{border:1.5px solid var(--navy);color:var(--navy);background:transparent;}
.btn-outline:hover{background:var(--navy);color:var(--white);}
.btn-outline-light{border:1.5px solid rgba(255,255,255,0.55);color:var(--white);}
.btn-outline-light:hover{background:rgba(255,255,255,0.12);border-color:var(--white);}
.btn-block{width:100%;}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;}
.burger span{width:24px;height:2px;background:var(--navy);display:block;}
.mobile-panel{
  position:fixed;top:0;right:-100%;width:82%;max-width:340px;height:100vh;background:var(--navy-deep);
  z-index:200;transition:right .3s ease;padding:90px 30px 30px;display:flex;flex-direction:column;gap:24px;
}
.mobile-panel.open{right:0;}
.mobile-panel a{color:var(--white);font-size:16px;font-weight:500;}
.overlay{position:fixed;inset:0;background:rgba(10,20,30,0.55);z-index:150;display:none;}
.overlay.show{display:block;}

/* ---------- Hero (home) ---------- */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;overflow:hidden;background:var(--navy-deep);}
.hero video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;opacity:0.55;}
.hero::before{
  content:'';position:absolute;inset:0;z-index:2;
  background:linear-gradient(100deg,rgba(10,31,51,0.96) 0%,rgba(10,31,51,0.78) 42%,rgba(10,31,51,0.55) 100%);
}
.hero-content{position:relative;z-index:3;color:var(--white);padding:120px 0 80px;}
.hero h1{
  font-size:clamp(32px,4.6vw,56px);color:var(--white);max-width:760px;margin-top:6px;
}
.hero h1 .accent{color:var(--copper-light);}
.hero p.lede{margin-top:20px;max-width:560px;font-size:17px;color:var(--text-inv);}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}
.trust-strip{
  position:relative;z-index:3;border-top:1px solid rgba(255,255,255,0.14);margin-top:60px;padding-top:26px;
  display:flex;flex-wrap:wrap;gap:34px;
}
.trust-item{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-inv);font-weight:500;}
.trust-item .dot{width:6px;height:6px;background:var(--copper);border-radius:50%;flex-shrink:0;}

/* ---------- Page header banner (interior pages) ---------- */
.page-banner{
  background:var(--navy-deep);color:var(--white);padding:130px 0 60px;position:relative;overflow:hidden;
}
.page-banner::after{
  content:'';position:absolute;right:-60px;top:-60px;width:320px;height:320px;border:1px solid rgba(255,255,255,0.08);
  border-radius:50%;
}
.page-banner h1{color:var(--white);font-size:clamp(28px,4vw,44px);}
.page-banner p{margin-top:14px;max-width:600px;color:var(--text-inv);font-size:16px;}
.breadcrumb{font-size:12.5px;color:#8FA0AE;margin-bottom:16px;letter-spacing:0.03em;}
.breadcrumb a:hover{color:var(--copper-light);}

/* ---------- Sections ---------- */
section{padding:96px 0;}
.section-tight{padding:70px 0;}
.section-alt{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-dark{background:var(--navy-deep);color:var(--white);}
.section-dark h2{color:var(--white);}
.section-head{max-width:640px;margin-bottom:52px;}
.section-head h2{font-size:clamp(24px,3.2vw,36px);}
.section-head p{margin-top:14px;color:var(--text-dim);font-size:16px;}
.section-dark .section-head p{color:var(--text-inv);}

/* ---------- Stats ---------- */
.stats-bar{background:var(--navy);padding:44px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat{color:var(--white);border-left:2px solid var(--copper);padding-left:16px;}
.stat .num{font-size:clamp(24px,3vw,36px);font-weight:800;color:var(--white);}
.stat .label{font-size:12.5px;color:var(--text-inv);margin-top:4px;letter-spacing:0.03em;}

/* ---------- Cards ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}

.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;
  transition:border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.card:hover{border-color:var(--copper);transform:translateY(-3px);box-shadow:0 12px 28px rgba(14,42,67,0.08);}
.card .ico{
  width:44px;height:44px;border-radius:var(--radius);background:var(--navy);color:var(--copper-light);
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;margin-bottom:18px;
}
.card h3{font-size:18px;margin-bottom:8px;}
.card p{font-size:14.5px;color:var(--text-dim);}
.card .card-cta{margin-top:16px;font-size:13px;font-weight:600;color:var(--copper);display:inline-block;}
.card ul.mini{margin-top:14px;}
.card ul.mini li{font-size:13.5px;color:var(--text-dim);padding-left:16px;position:relative;margin-bottom:6px;}
.card ul.mini li::before{content:'—';position:absolute;left:0;color:var(--copper);}

/* Software cards */
.soft-card{background:var(--navy-deep);color:var(--white);border-radius:var(--radius);padding:34px;}
.soft-card h3{color:var(--white);font-size:20px;margin-bottom:10px;}
.soft-card p{color:var(--text-inv);font-size:14.5px;margin-bottom:14px;}
.soft-card .tagrow{display:flex;gap:8px;flex-wrap:wrap;}
.tag{
  font-size:11.5px;padding:5px 11px;border:1px solid rgba(255,255,255,0.22);border-radius:20px;color:var(--text-inv);
}

/* Process timeline */
.timeline{position:relative;padding-left:32px;border-left:2px solid var(--line);}
.t-step{position:relative;padding-bottom:44px;}
.t-step:last-child{padding-bottom:0;}
.t-step::before{
  content:'';position:absolute;left:-38px;top:2px;width:12px;height:12px;border-radius:50%;
  background:var(--copper);border:3px solid var(--white);box-shadow:0 0 0 2px var(--copper);
}
.t-step .t-num{font-size:12px;color:var(--copper);font-weight:700;letter-spacing:0.08em;}
.t-step h3{font-size:18px;margin:6px 0 6px;}
.t-step p{font-size:14.5px;color:var(--text-dim);max-width:520px;}

/* Placeholder blocks (for content marked to be added later) */
.placeholder{
  border:1.5px dashed #C7CDD3;border-radius:var(--radius);padding:22px;background:#FBFBFC;
  color:#7C848C;font-size:13.5px;
}
.placeholder strong{color:var(--navy);}
.ph-img{
  aspect-ratio:16/10;border:1.5px dashed #C7CDD3;border-radius:var(--radius);background:#F0F1F3;
  display:flex;align-items:center;justify-content:center;color:#9AA1A8;font-size:13px;text-align:center;padding:16px;
}

/* Project cards */
.project-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.project-card .pc-body{padding:22px;}
.project-card h3{font-size:17px;margin-bottom:6px;}
.project-meta{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--text-dim);margin:10px 0;}
.project-meta span{display:flex;align-items:center;gap:5px;}

/* CTA band */
.cta-band{background:var(--copper);color:var(--white);text-align:center;padding:64px 0;}
.cta-band h2{color:var(--white);font-size:clamp(22px,3vw,32px);}
.cta-band p{color:rgba(255,255,255,0.9);margin-top:10px;}
.cta-band .hero-actions{justify-content:center;margin-top:26px;}
.cta-band .btn-primary{background:var(--navy);}
.cta-band .btn-primary:hover{background:var(--navy-deep);}
.cta-band .btn-outline-light{border-color:rgba(255,255,255,0.6);}

/* Form */
.form-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:0 12px 32px rgba(14,42,67,0.06);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--navy);margin-bottom:6px;}
.field .req{color:var(--copper);}
input,select,textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--radius);
  font-family:'Inter',sans-serif;font-size:14px;background:var(--bg);transition:border-color .2s ease;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--copper);}
textarea{min-height:120px;resize:vertical;}
.full{grid-column:1/-1;}
.file-drop{
  border:1.5px dashed var(--line);border-radius:var(--radius);padding:22px;text-align:center;
  font-size:13px;color:var(--text-dim);background:var(--bg);
}

/* FAQ */
.faq-item{border-bottom:1px solid var(--line);padding:20px 0;}
.faq-item h3{font-size:15.5px;font-weight:600;color:var(--navy);margin-bottom:8px;}
.faq-item p{font-size:14px;color:var(--text-dim);}

/* Contact info rows */
.info-row{display:flex;gap:14px;margin-bottom:20px;}
.info-row .ico{
  width:38px;height:38px;background:var(--navy);color:var(--copper-light);border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:15px;
}
.info-row .lbl{font-size:11.5px;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-dim);}
.info-row .val{font-size:14.5px;font-weight:600;color:var(--navy);}
.info-row a.val:hover{color:var(--copper);}

/* ---------- Footer ---------- */
footer.site-footer{background:var(--navy-deep);color:var(--text-inv);padding:64px 0 26px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px;}
.footer-grid h4{color:var(--white);font-size:13px;letter-spacing:0.06em;text-transform:uppercase;margin-bottom:16px;}
.footer-grid li{margin-bottom:10px;font-size:14px;}
.footer-grid li a:hover{color:var(--copper-light);}
.footer-brand .b-main{color:var(--white);font-size:18px;font-weight:800;}
.footer-brand .b-main span{color:var(--copper-light);}
.footer-brand p{margin-top:12px;font-size:13.5px;color:#93A1AC;max-width:280px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);padding-top:22px;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:12px;font-size:12.5px;color:#7E8B96;
}
.footer-bottom a:hover{color:var(--copper-light);}
.market-pill{display:inline-flex;gap:8px;margin-top:8px;}
.market-pill span{font-size:11px;padding:4px 10px;border:1px solid rgba(255,255,255,0.2);border-radius:20px;}

.footer-social{display:flex;flex-wrap:wrap;gap:20px;margin-bottom:22px;padding-top:6px;}
.footer-social a{font-size:13px;font-weight:600;color:var(--copper-light);}
.footer-social a:hover{color:var(--white);}
.footer-social .soon{font-size:13px;color:#5D6B77;}
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease;}
.reveal.visible{opacity:1;transform:translateY(0);}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .nav-links,.nav-actions .btn-outline{display:none;}
  .nav-actions .btn-primary{display:none;}
  .burger{display:flex;}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px 20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media(max-width:640px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  section{padding:60px 0;}
  .page-banner{padding:110px 0 44px;}
  .hero-content{padding:100px 0 56px;}
}

/* ---------- Project gallery / lightbox ---------- */
.proj-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s ease, box-shadow .2s ease;}
.proj-card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(14,42,67,0.08);}
.proj-cover{aspect-ratio:4/3;overflow:hidden;background:#EDEEF0;cursor:pointer;position:relative;}
.proj-cover img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease;}
.proj-cover:hover img{transform:scale(1.05);}
.proj-cover .count-badge{
  position:absolute;bottom:10px;right:10px;background:rgba(14,42,67,0.85);color:#fff;
  font-size:11.5px;padding:4px 10px;border-radius:20px;font-weight:600;
}
.proj-body{padding:24px;}
.proj-body .cat{font-size:11.5px;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:var(--copper);margin-bottom:8px;}
.proj-body h3{font-size:19px;margin-bottom:8px;}
.proj-body p{font-size:14px;color:var(--text-dim);margin-bottom:14px;}
.proj-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.proj-tags span{font-size:11.5px;padding:5px 11px;border:1px solid var(--line);border-radius:20px;color:var(--text-dim);}
.proj-sets{display:flex;flex-wrap:wrap;gap:10px;}
.proj-set-btn{
  font-size:13px;font-weight:600;color:var(--navy);background:var(--bg);border:1px solid var(--line);
  border-radius:var(--radius);padding:9px 14px;cursor:pointer;transition:all .2s ease;
}
.proj-set-btn:hover{background:var(--navy);color:#fff;border-color:var(--navy);}

/* Lightbox */
.lb-overlay{
  position:fixed;inset:0;background:rgba(10,20,30,0.92);z-index:500;display:none;
  align-items:center;justify-content:center;flex-direction:column;padding:20px;
}
.lb-overlay.open{display:flex;}
.lb-top{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:1100px;color:#fff;margin-bottom:14px;}
.lb-title{font-size:14px;font-weight:600;letter-spacing:0.02em;}
.lb-close{background:none;border:none;color:#fff;font-size:26px;cursor:pointer;line-height:1;padding:4px 10px;}
.lb-stage{position:relative;width:100%;max-width:1100px;flex:1;display:flex;align-items:center;justify-content:center;min-height:0;}
.lb-stage img{max-width:100%;max-height:75vh;border-radius:2px;box-shadow:0 20px 60px rgba(0,0,0,0.5);}
.lb-nav{
  position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,0.12);
  border:none;color:#fff;font-size:22px;width:44px;height:44px;border-radius:50%;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:background .2s ease;
}
.lb-nav:hover{background:rgba(255,255,255,0.28);}
.lb-prev{left:0;}
.lb-next{right:0;}
.lb-counter{color:#C9D2DA;font-size:13px;margin-top:14px;}
@media(max-width:640px){
  .lb-nav{width:38px;height:38px;font-size:18px;}
}