/* ===========================================================
   S O Building & Construction Limited — site styles
   Typeface: Montserrat throughout (weights 400–800)
   =========================================================== */
:root{
  --ink:#211d18;
  --navy:#152238;
  --navy-2:#1e3050;
  --brass:#b9924f;
  --brass-light:#e3c98d;
  --paper:#e9e4d6;
  --paper-2:#f2eee3;
  --brick:#7c3324;
  --logo-blue:#4f81bd;
  --logo-blue-dark:#304f75;
  --line: rgba(185,146,79,.4);
  --line-soft: rgba(185,146,79,.22);
  --font: 'Montserrat', sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-weight:400;
  color:var(--ink);
  background:var(--paper-2);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font);
  font-weight:800;
  letter-spacing:-.01em;
  margin:0;
}
.eyebrow{
  font-family:var(--font);
  font-weight:600;
  font-size:.72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--brass);
  display:flex;
  align-items:center;
  gap:.6em;
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:var(--brass);
  display:inline-block;
}
a{color:inherit;}
img{display:block;max-width:100%;}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px;}
.btn{
  font-family:var(--font);
  font-weight:600;
  font-size:.78rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:.6em;
  padding:.95em 1.6em;
  border:1px solid var(--brass);
  transition:all .25s ease;
}
.btn-solid{background:var(--brass);color:var(--navy);border-color:var(--brass);}
.btn-solid:hover{background:var(--brass-light);border-color:var(--brass-light);}
.btn-line{color:var(--paper);border-color:var(--line);}
.btn-line:hover{border-color:var(--brass);color:var(--brass-light);}
.btn-line.dark{color:var(--ink);border-color:var(--ink);}
.btn-line.dark:hover{border-color:var(--brick);color:var(--brick);}

/* ---------- corner registration marks ---------- */
.plate{position:relative;}
.plate::before,.plate::after{
  content:"";
  position:absolute;width:14px;height:14px;
  border:1px solid var(--brass);
  opacity:.65;
}
.plate::before{top:-1px;left:-1px;border-right:none;border-bottom:none;}
.plate::after{bottom:-1px;right:-1px;border-left:none;border-top:none;}

/* ---------- topbar ---------- */
.topbar{
  background:var(--ink);
  color:var(--paper);
  font-weight:500;
  font-size:.72rem;
  letter-spacing:.04em;
}
.topbar .wrap{
  display:flex;justify-content:space-between;align-items:center;
  padding-top:8px;padding-bottom:8px;flex-wrap:wrap;gap:6px;
}
.topbar a{text-decoration:none;color:var(--brass-light);}
.topbar span{opacity:.75;margin-right:1.4em;}

/* ---------- nav ---------- */
.nav{
  background:var(--paper-2);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:14px;padding-bottom:14px;position:relative;}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);}
.brand img.logo{height:42px;width:auto;display:block;}
.brand .mark{width:44px;height:44px;flex:0 0 auto;}
.brand .word{line-height:1.05;}
.brand .word b{display:block;font-family:var(--font);font-weight:800;font-size:1.02rem;letter-spacing:-.01em;}
.brand .word small{display:block;font-family:var(--font);font-weight:600;font-size:.62rem;letter-spacing:.14em;color:var(--brass);text-transform:uppercase;margin-top:2px;}
nav.links{display:flex;align-items:center;gap:2rem;}
nav.links a{
  text-decoration:none;font-family:var(--font);font-weight:600;
  font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink);
  padding-bottom:4px;border-bottom:1px solid transparent;
}
nav.links a:hover, nav.links a.active{border-color:var(--brass);color:var(--brick);}
nav.links .tag{
  background:var(--brick);color:var(--paper-2);padding:.5em .9em;
  border:1px solid var(--brick);
}
nav.links .tag:hover{color:var(--paper-2);border-color:var(--brick);opacity:.88;}

/* ---------- mobile nav toggle ---------- */
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:38px;height:38px;
  background:none;border:none;padding:0;
  cursor:pointer;
  flex:0 0 auto;
}
.nav-toggle span{
  display:block;width:22px;height:2px;background:var(--ink);
  transition:transform .25s ease,opacity .2s ease;
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- scroll-to-top button ---------- */
.scroll-top{
  position:fixed;
  right:22px;bottom:22px;
  width:46px;height:46px;
  border-radius:50%;
  background:var(--brick);
  color:var(--paper-2);
  border:1px solid var(--brick);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  padding:0;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s,background .25s ease,border-color .25s ease;
  z-index:80;
  box-shadow:0 10px 24px rgba(20,16,10,.28);
}
.scroll-top svg{width:20px;height:20px;}
.scroll-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.scroll-top:hover{background:var(--brass);border-color:var(--brass);color:var(--navy);}
@media (max-width:600px){
  .scroll-top{right:16px;bottom:16px;width:42px;height:42px;}
}

/* ---------- blueprint grid backdrop ---------- */
.grid-bg{position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 39px, var(--line-soft) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 39px, var(--line-soft) 39px 40px);
  opacity:.5;
}

/* ---------- hero (home) ---------- */
.hero{position:relative;background:linear-gradient(155deg,var(--navy) 0%,var(--navy-2) 100%);color:var(--paper-2);overflow:hidden;}
.hero .grid-bg{mask-image: radial-gradient(ellipse at 30% 30%, black 10%, transparent 72%);}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;padding-top:96px;padding-bottom:80px;align-items:center;}
.hero h1{font-size:clamp(2.1rem,3.6vw,3.2rem);line-height:1.08;color:var(--paper-2);margin:.5em 0 .55em;}
.hero h1 em{font-style:italic;color:var(--brass-light);}
.hero p.lede{font-size:1.05rem;line-height:1.65;color:rgba(242,238,227,.85);max-width:46ch;font-weight:400;}
.hero .ctas{display:flex;gap:14px;margin-top:2em;flex-wrap:wrap;}
.hero-plate{position:relative;border:1px solid var(--line);aspect-ratio:4/5;overflow:hidden;}
.hero-plate img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.02);}
.hero-plate .cap{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(0deg, rgba(21,34,56,.92), transparent);padding:34px 18px 14px;font-weight:600;font-size:.68rem;letter-spacing:.1em;color:var(--brass-light);text-transform:uppercase;}
.compass{position:absolute;width:120px;height:120px;opacity:.55;}

/* ---------- interior page title band ---------- */
.title-band{position:relative;background:linear-gradient(155deg,var(--navy) 0%,var(--navy-2) 100%);color:var(--paper-2);overflow:hidden;padding:64px 0 56px;}
.title-band .wrap{position:relative;z-index:2;}
.title-band .crumb{font-weight:600;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--brass-light);opacity:.8;margin-bottom:1.1em;}
.title-band .crumb a{text-decoration:none;color:var(--brass-light);}
.title-band .crumb span{opacity:.5;margin:0 .5em;}
.title-band h1{font-size:clamp(1.9rem,3.2vw,2.6rem);color:var(--paper-2);margin-top:.3em;}
.title-band p{margin-top:.9em;max-width:56ch;color:rgba(242,238,227,.78);font-size:1rem;line-height:1.6;}

/* ---------- section shell ---------- */
section{padding:88px 0;}
.sec-head{max-width:640px;margin-bottom:52px;}
.sec-head h2{font-size:clamp(1.7rem,2.6vw,2.35rem);margin-top:.5em;line-height:1.15;}
.sec-head p{color:#4b453c;font-size:1.02rem;line-height:1.6;margin-top:.9em;font-weight:400;}
.rule{height:1px;background:var(--line);border:0;margin:0;}
.center{text-align:center;margin-left:auto;margin-right:auto;}

/* ---------- about ---------- */
.about{background:var(--paper-2);}
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;}
.about p{color:#3d372f;line-height:1.75;font-size:1.02rem;font-weight:400;}
.about p + p{margin-top:1.1em;}
.about p strong{color:var(--ink);font-weight:600;}
.about ul{margin:1em 0 0;padding:0;list-style:none;display:grid;gap:.55em;}
.about ul li{position:relative;padding-left:1.3em;color:#3d372f;line-height:1.6;font-size:.99rem;}
.about ul li::before{content:"";position:absolute;left:0;top:.6em;width:7px;height:7px;background:var(--brass);}
.about ul + p{margin-top:1.4em;}
.plaque{border:1px solid var(--brass);background:var(--navy);color:var(--paper-2);padding:34px 30px;position:relative;}
.plaque h3{font-family:var(--font);font-weight:700;font-style:italic;font-size:1.15rem;color:var(--brass-light);margin-bottom:.9em;}
.plaque dl{margin:0;display:grid;gap:14px;}
.plaque dt{font-weight:600;font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--brass);}
.plaque dd{margin:2px 0 0;font-size:.98rem;font-weight:400;color:var(--paper-2);}

/* ---------- process steps (about page) ---------- */
.process{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);margin-top:64px;}
.process .step{background:var(--paper-2);padding:34px 28px;}
.process .num{font-weight:800;font-size:.75rem;letter-spacing:.1em;color:var(--brass);}
.process h4{font-size:1.05rem;font-weight:700;margin-top:.6em;}
.process p{font-size:.9rem;color:#4b453c;margin-top:.6em;line-height:1.55;font-weight:400;}

/* ---------- services ---------- */
.services{background:var(--navy);color:var(--paper-2);position:relative;}
.services .wrap{position:relative;z-index:2;}
.services .eyebrow{color:var(--brass-light);}
.services .sec-head p{color:rgba(242,238,227,.75);}
.services .sec-head h2{color:var(--paper-2);}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);}
.svc-card{background:var(--navy);padding:34px 28px;min-height:190px;display:flex;flex-direction:column;gap:16px;}
.svc-card svg{width:34px;height:34px;stroke:var(--brass-light);}
.svc-card h3{font-size:1.05rem;font-weight:700;color:var(--paper-2);}
.svc-card p{font-size:.88rem;line-height:1.55;color:rgba(242,238,227,.65);margin:0;font-weight:400;}
.svc-card ul{margin:.4em 0 0;padding-left:1.1em;font-size:.85rem;color:rgba(242,238,227,.6);line-height:1.6;}

/* ---------- portfolio ---------- */
.portfolio{background:var(--paper-2);}
.pf-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:290px;gap:22px;}
.pf-item{position:relative;overflow:hidden;border:1px solid var(--line);}
.pf-item img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;filter:saturate(.95);}
.pf-item:hover img{transform:scale(1.055);}
.pf-item .cap{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(0deg, rgba(21,34,56,.92), transparent 80%);color:var(--paper-2);padding:36px 18px 14px;}
.pf-item .cap b{display:block;font-weight:700;font-size:1rem;}
.pf-item .cap span{font-weight:600;font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--brass-light);}
.pf-item.tall{grid-row:span 2;}

/* ---------- CTA band ---------- */
.cta-band{background:var(--brick);color:var(--paper-2);padding:56px 0;}
.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px;}
.cta-band h3{font-size:1.5rem;color:var(--paper-2);}
.cta-band p{margin-top:.4em;color:rgba(242,238,227,.8);font-weight:400;}

/* ---------- contact ---------- */
.contact{background:var(--navy);color:var(--paper-2);}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;}
.contact .sec-head h2{color:var(--paper-2);}
.contact .sec-head p{color:rgba(242,238,227,.75);}
.clist{list-style:none;margin:34px 0 0;padding:0;display:grid;gap:22px;}
.clist li{display:flex;gap:16px;align-items:flex-start;}
.clist svg{width:22px;height:22px;stroke:var(--brass-light);flex:0 0 auto;margin-top:2px;}
.clist b{display:block;font-weight:600;font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;color:var(--brass);}
.clist span{font-size:1rem;color:var(--paper-2);font-weight:400;}
.clist a{text-decoration:none;}
form.enquiry{border:1px solid var(--line);padding:36px;background:rgba(233,228,214,.03);}
form.enquiry .row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px;}
form.enquiry label{display:block;font-weight:600;font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--brass-light);margin-bottom:8px;}
form.enquiry input, form.enquiry select, form.enquiry textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line);
  color:var(--paper-2);font-family:var(--font);font-size:.96rem;font-weight:400;padding:8px 2px;
}
form.enquiry input:focus, form.enquiry select:focus, form.enquiry textarea:focus{outline:none;border-color:var(--brass);}
form.enquiry .full{margin-bottom:18px;}
form.enquiry textarea{resize:vertical;min-height:80px;}
form.enquiry option{color:var(--ink);}
.map-note{margin-top:28px;border:1px solid var(--line);padding:20px 22px;font-size:.85rem;color:rgba(242,238,227,.65);}

/* ---------- footer ---------- */
footer{background:linear-gradient(155deg,var(--logo-blue) 0%,var(--logo-blue-dark) 100%);color:var(--paper-2);padding:64px 0 26px;position:relative;}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:48px;}
.foot-grid .brand{color:var(--paper-2);}
.foot-grid .brand .brand-plate{display:inline-flex;align-items:center;background:var(--paper-2);border-radius:8px;padding:8px 14px;}
.foot-grid .brand img.logo{height:32px;}
.foot-grid .brand .word small{color:var(--brass-light);}
.foot-grid p{color:rgba(242,238,227,.75);font-size:.92rem;line-height:1.6;margin-top:1em;max-width:36ch;font-weight:400;}
footer h4{font-weight:700;font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--brass-light);margin-bottom:1.2em;}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:.85em;}
footer ul a{text-decoration:none;color:rgba(242,238,227,.85);font-size:.92rem;font-weight:400;}
footer ul a:hover{color:var(--brass-light);}
.foot-bottom{margin-top:56px;padding-top:22px;border-top:1px solid rgba(242,238,227,.25);display:flex;justify-content:flex-start;flex-wrap:wrap;gap:10px;font-weight:500;font-size:.68rem;letter-spacing:.04em;color:rgba(242,238,227,.65);}

@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr;padding-top:52px;}
  .hero-plate{aspect-ratio:16/10;}
  .about-grid{grid-template-columns:1fr;}
  .svc-grid{grid-template-columns:repeat(2,1fr);}
  .process{grid-template-columns:1fr;}
  .pf-grid{grid-template-columns:repeat(2,1fr);}
  .pf-item.tall{grid-row:span 1;}
  .contact-grid{grid-template-columns:1fr;}
  form.enquiry .row{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;gap:34px;}
  .nav-toggle{display:flex;}
  nav.links{
    display:none;
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:var(--paper-2);
    border:1px solid var(--line);
    border-top:none;
    padding:6px 28px 20px;
    box-shadow:0 16px 28px rgba(20,16,10,.14);
    z-index:60;
  }
  nav.links.nav-open{display:flex;}
  nav.links a{
    padding:13px 0;
    border-bottom:1px solid var(--line-soft);
  }
  nav.links a.active, nav.links a:hover{border-color:var(--brass);}
  nav.links .tag{
    margin-top:14px;
    text-align:center;
    justify-content:center;
  }
  .topbar span:last-child{margin-right:0;}
  .cta-band .wrap{flex-direction:column;align-items:flex-start;}
}
@media (max-width:600px){
  .svc-grid{grid-template-columns:1fr;}
  .pf-grid{grid-template-columns:1fr;}
  .topbar .wrap{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .pf-item img{transition:none;}
  .scroll-top{transition:opacity .01s linear;}
}