/* ============================================================
   SK CONSTRUCTION — design tokens
   Concept: the language of a construction site drawing —
   blueprint grids, dimension lines, title blocks, site tags.
   ============================================================ */
:root{
  --navy: #0F2436;
  --navy-2: #16334A;
  --navy-3: #1E4159;
  --paper: #EDEEEA;
  --paper-2: #E2E4DC;
  --ink: #16201F;
  --ink-soft: #45514E;
  --concrete: #C7C2B8;
  --steel: #4C6672;
  --safety: #E8630C;
  --safety-dark: #C34F06;
  --hazard: #F2B705;
  --line: rgba(22,32,31,0.14);
  --line-onnavy: rgba(255,255,255,0.16);

  --font-display: "Big Shoulders Display", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --maxw: 1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;}
h1,h2,h3,h4{margin:0;font-family:var(--font-display);text-transform:uppercase;letter-spacing:0.01em;}
p{margin:0;line-height:1.6;}
button{font-family:inherit;cursor:pointer;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}

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

:focus-visible{outline:3px solid var(--safety);outline-offset:2px;}

/* ---------- eyebrow / dimension label ---------- */
.dim-label{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--safety);
}
.dim-label::before{content:"";width:26px;height:1px;background:var(--safety);}
.on-navy .dim-label{color:var(--hazard);}
.on-navy .dim-label::before{background:var(--hazard);}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--navy);
  border-bottom:1px solid var(--line-onnavy);
}
.site-header .wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:76px;
}
.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;}
.brand-mark{
  width:38px;height:38px;border:2px solid var(--hazard);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);color:var(--hazard);font-size:18px;
  transform:rotate(0deg);
}
.brand-name{font-family:var(--font-display);font-size:20px;letter-spacing:0.03em;color:#fff;}
.brand-name span{color:var(--hazard);}
nav.main-nav{display:flex;gap:32px;}
nav.main-nav a{
  color:rgba(255,255,255,0.82);text-decoration:none;
  font-family:var(--font-mono);font-size:13px;letter-spacing:0.06em;text-transform:uppercase;
  padding:6px 0;border-bottom:2px solid transparent;
}
nav.main-nav a:hover{color:#fff;border-color:var(--safety);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:0.06em;text-transform:uppercase;
  padding:13px 24px;border:1px solid transparent;text-decoration:none;
  transition:transform .15s ease, background .15s ease, color .15s ease;
}
.btn-primary{background:var(--safety);color:#fff;}
.btn-primary:hover{background:var(--safety-dark);transform:translateY(-1px);}
.btn-ghost{border-color:var(--line-onnavy);color:#fff;background:transparent;}
.btn-ghost:hover{border-color:var(--hazard);color:var(--hazard);}
.btn-dark{border-color:var(--navy);color:var(--navy);background:transparent;}
.btn-dark:hover{background:var(--navy);color:#fff;}
.nav-toggle{display:none;background:none;border:1px solid var(--line-onnavy);color:#fff;padding:8px 10px;}

/* ---------- hero ---------- */
.hero{
  position:relative;background:var(--navy);color:#fff;overflow:hidden;
  padding:88px 0 0;
}
.blueprint-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(var(--line-onnavy) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-onnavy) 1px, transparent 1px);
  background-size:44px 44px;
  opacity:0.35;
  mask-image:linear-gradient(180deg, rgba(0,0,0,0.9), rgba(0,0,0,0.15));
}
.hero-inner{position:relative;z-index:1;padding-bottom:70px;}
.hero h1{
  font-size:clamp(40px, 6.4vw, 84px);
  line-height:0.98;
  max-width:15ch;
  margin:22px 0 26px;
}
.hero h1 em{font-style:normal;color:var(--hazard);}
.hero-sub{max-width:52ch;color:rgba(255,255,255,0.78);font-size:17px;margin-bottom:36px;}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:56px;}

/* title-block stat strip */
.title-block{
  border-top:1px solid var(--line-onnavy);
  display:grid;grid-template-columns:repeat(4,1fr);
}
.title-block .cell{
  padding:20px 24px;border-right:1px solid var(--line-onnavy);
}
.title-block .cell:last-child{border-right:none;}
.title-block .cell .num{font-family:var(--font-display);font-size:34px;color:var(--hazard);line-height:1;}
.title-block .cell .lbl{font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:rgba(255,255,255,0.6);margin-top:8px;}

/* ---------- section shells ---------- */
section{padding:96px 0;}
.on-navy{background:var(--navy);color:#fff;}
.on-paper2{background:var(--paper-2);}
.sec-head{max-width:640px;margin-bottom:56px;}
.sec-head h2{font-size:clamp(30px,4vw,46px);margin-top:14px;line-height:1.02;}
.sec-head p{margin-top:16px;color:var(--ink-soft);font-size:16px;}
.on-navy .sec-head p{color:rgba(255,255,255,0.72);}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.about-photo{position:relative;border:1px solid var(--line);aspect-ratio:4/5;overflow:hidden;background:var(--concrete);}
.about-photo img{width:100%;height:100%;object-fit:cover;}
.about-tag{
  position:absolute;bottom:16px;left:16px;background:var(--navy);color:#fff;
  font-family:var(--font-mono);font-size:12px;letter-spacing:0.06em;padding:8px 12px;
  display:flex;align-items:center;gap:8px;
}
.about-tag::before{content:"";width:8px;height:8px;background:var(--hazard);}
.about-copy p{color:var(--ink-soft);margin-top:18px;}
.about-copy p:first-of-type{margin-top:20px;}

/* ---------- services ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.svc-card{background:var(--paper);padding:32px 28px;position:relative;}
.on-navy .svc-card{background:var(--navy);}
.svc-num{font-family:var(--font-mono);font-size:12px;color:var(--safety);letter-spacing:0.08em;}
.svc-card h3{font-size:22px;margin-top:16px;text-transform:none;letter-spacing:0;}
.svc-card p{color:var(--ink-soft);margin-top:10px;font-size:14.5px;}
.svc-card img.svc-img{width:100%;aspect-ratio:16/10;object-fit:cover;margin-bottom:18px;border:1px solid var(--line);}

/* ---------- projects ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.proj-card{position:relative;border:1px solid var(--line-onnavy);overflow:hidden;}
.proj-photo{aspect-ratio:4/3;background:var(--navy-3);overflow:hidden;}
.proj-photo img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.proj-card:hover .proj-photo img{transform:scale(1.06);}
.proj-tagline{
  position:absolute;top:14px;left:14px;background:var(--hazard);color:var(--navy);
  font-family:var(--font-mono);font-size:11px;letter-spacing:0.06em;text-transform:uppercase;
  padding:5px 10px;font-weight:600;
}
.proj-body{padding:18px 4px 4px;}
.proj-body h3{font-size:19px;text-transform:none;letter-spacing:0;}
.proj-meta{display:flex;gap:14px;margin-top:8px;font-family:var(--font-mono);font-size:12px;color:rgba(255,255,255,0.6);}
.proj-meta span{display:flex;align-items:center;gap:6px;}

/* ---------- process ---------- */
.process-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);}
.process-step{padding:32px 26px 0;border-right:1px solid var(--line);position:relative;}
.process-step:last-child{border-right:none;}
.process-step .step-no{font-family:var(--font-display);font-size:46px;color:var(--concrete);line-height:1;}
.process-step h3{font-size:18px;margin-top:12px;text-transform:none;letter-spacing:0;}
.process-step p{margin-top:10px;color:var(--ink-soft);font-size:14px;}

/* ---------- testimonials ---------- */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.testi-card{background:var(--paper);border:1px solid var(--line);padding:28px;display:flex;flex-direction:column;gap:16px;}
.testi-stars{font-family:var(--font-mono);color:var(--safety);font-size:14px;letter-spacing:2px;}
.testi-quote{color:var(--ink);font-size:15px;line-height:1.65;flex:1;}
.testi-who{display:flex;align-items:center;gap:12px;}
.testi-avatar{width:42px;height:42px;border-radius:50%;object-fit:cover;background:var(--concrete);flex-shrink:0;}
.testi-name{font-family:var(--font-mono);font-size:13px;letter-spacing:0.03em;}
.testi-loc{font-size:12px;color:var(--ink-soft);}

/* ---------- gallery ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;}
.gallery-grid figure{margin:0;aspect-ratio:1/1;overflow:hidden;background:var(--paper-2);}
.gallery-grid img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease, opacity .2s ease;}
.gallery-grid figure:hover img{transform:scale(1.08);}

/* ---------- empty state ---------- */
.empty-note{
  font-family:var(--font-mono);font-size:13px;color:var(--ink-soft);
  border:1px dashed var(--line);padding:22px 24px;
}
.on-navy .empty-note{color:rgba(255,255,255,0.6);border-color:var(--line-onnavy);}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;}
.contact-info-list{margin-top:28px;display:flex;flex-direction:column;gap:20px;}
.contact-info-item{display:flex;gap:14px;}
.contact-info-item .ico{
  width:38px;height:38px;border:1px solid var(--line-onnavy);display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);color:var(--hazard);flex-shrink:0;font-size:15px;
}
.contact-info-item .lbl{font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:rgba(255,255,255,0.55);}
.contact-info-item .val{font-size:15px;margin-top:3px;}
.form-row{display:flex;flex-direction:column;gap:6px;margin-bottom:18px;}
.form-row label{font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:rgba(255,255,255,0.6);}
.form-row input,.form-row textarea{
  background:rgba(255,255,255,0.04);border:1px solid var(--line-onnavy);color:#fff;
  padding:13px 14px;font-family:var(--font-body);font-size:15px;
}
.form-row input:focus,.form-row textarea:focus{border-color:var(--hazard);outline:none;}
.form-row textarea{resize:vertical;min-height:110px;}
.form-msg{font-family:var(--font-mono);font-size:13px;margin-top:14px;min-height:18px;}
.form-msg.ok{color:#8FD19E;}
.form-msg.err{color:#F19393;}

/* ---------- footer ---------- */
footer{background:#0B1A27;color:rgba(255,255,255,0.55);padding:44px 0 28px;}
.footer-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;}
.footer-row .brand-name{font-size:16px;}
.footer-links{display:flex;gap:22px;font-family:var(--font-mono);font-size:12px;}
.footer-links a{text-decoration:none;color:rgba(255,255,255,0.55);}
.footer-links a:hover{color:var(--hazard);}
.footer-fine{margin-top:20px;font-family:var(--font-mono);font-size:11px;color:rgba(255,255,255,0.3);}

/* ---------- responsive ---------- */
@media (max-width:980px){
  nav.main-nav{position:fixed;top:76px;left:0;right:0;background:var(--navy);flex-direction:column;padding:12px 28px 24px;gap:6px;border-bottom:1px solid var(--line-onnavy);transform:translateY(-130%);transition:transform .2s ease;}
  nav.main-nav.open{transform:translateY(0);}
  nav.main-nav a{padding:12px 0;border-bottom:1px solid var(--line-onnavy);}
  .nav-toggle{display:block;}
  .hero-actions-desktop{display:none;}
  .title-block{grid-template-columns:repeat(2,1fr);}
  .title-block .cell:nth-child(2n){border-right:none;}
  .title-block .cell{border-bottom:1px solid var(--line-onnavy);}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:36px;}
  .grid-3,.proj-grid,.testi-grid{grid-template-columns:1fr 1fr;}
  .process-list{grid-template-columns:1fr 1fr;}
  .process-step{border-bottom:1px solid var(--line);padding-bottom:24px;}
  .gallery-grid{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:640px){
  section{padding:64px 0;}
  .grid-3,.proj-grid,.testi-grid,.process-list{grid-template-columns:1fr;}
  .gallery-grid{grid-template-columns:repeat(2,1fr);}
  .title-block{grid-template-columns:1fr 1fr;}
}