/* =========================================================
   SERV ARABIA — DESIGN SYSTEM
   Signature: engineering-drawing / piping-isometric motif.
   Sections carry "drawing tag" labels (DWG NO. / SCALE / REV)
   the way a real fabrication spec sheet would — this is an
   industrial materials company, so the chrome borrows its
   vocabulary from the isometrics and BOQs its clients live in.
   ========================================================= */

:root{
  --navy:        #0A1A2B;
  --navy-2:      #0F2740;
  --navy-3:      #142F4C;
  --steel:       #3C6E91;
  --steel-light: #7FB0D6;
  --sand:        #C7A368;
  --sand-light:  #E2C690;
  --paper:       #F4F2EC;
  --paper-2:     #EAE7DD;
  --line:        #D9D4C6;
  --ink:         #11202E;
  --slate:       #51626F;
  --slate-soft:  #8294A0;
  --white:       #FFFFFF;
  --ok:          #4F8F6B;

  --font-display: 'Poppins', 'Segoe UI', sans-serif;
  --font-body:    'Poppins', 'Segoe UI', sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;

  --container: 1240px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  margin:0;
  font-weight:600;
  letter-spacing:-0.01em;
  color:var(--navy);
}
p{margin:0;}
.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
}
@media (max-width:720px){ .wrap{padding:0 20px;} }

/* ---------- utility ---------- */
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--sand);
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;background:var(--sand);
  display:inline-block;
}
.eyebrow.on-dark{color:var(--sand-light);}
.eyebrow.on-light{color:#9C7C40;}

.tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.08em;
  color:var(--slate-soft);
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.04em;
  text-transform:uppercase;
  padding:14px 24px;
  border-radius:2px;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .22s ease;
  white-space:nowrap;
}
.btn-primary{ background:var(--sand); color:var(--navy); font-weight:600; }
.btn-primary:hover{ background:var(--sand-light); transform:translateY(-1px); }
.btn-ghost{ border-color:rgba(255,255,255,0.35); color:#fff; }
.btn-ghost:hover{ border-color:#fff; background:rgba(255,255,255,0.06); }
.btn-line{ border-color:var(--navy); color:var(--navy); }
.btn-line:hover{ background:var(--navy); color:#fff; }
.btn-wa{ background:#1F3D2E; color:#DCEFE2; }
.btn-wa:hover{ background:#28503B; }

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(10,26,43,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:78px;
}
.brand{
  display:flex; align-items:center; gap:12px;
  font-family:var(--font-display); font-weight:700; font-size:18px;
  color:#fff; letter-spacing:0.01em;
}
.brand-logo{
  height:42px;
  width:auto;
  display:block;
}
.brand small{
  display:block; font-family:var(--font-mono); font-weight:400;
  font-size:9.5px; letter-spacing:0.12em; color:var(--steel-light);
  text-transform:uppercase; margin-top:2px;
}
nav.main-nav{ display:flex; align-items:center; gap:34px; }
nav.main-nav a{
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:0.05em;
  text-transform:uppercase; color:#CBD6DF;
  position:relative; padding:6px 0;
}
nav.main-nav a:hover, nav.main-nav a.active{ color:#fff; }
nav.main-nav a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:1px; background:var(--sand);
}
.has-drop{ position:relative; }
.dropdown{
  position:absolute; top:36px; left:-18px; width:300px;
  background:var(--navy-2); border:1px solid rgba(255,255,255,0.1);
  padding:10px; opacity:0; visibility:hidden; transform:translateY(6px);
  transition:all .18s ease; box-shadow:0 18px 40px rgba(0,0,0,0.4);
}
.has-drop:hover .dropdown{ opacity:1; visibility:visible; transform:translateY(0); }
.dropdown a{
  display:flex; justify-content:space-between; padding:11px 12px;
  font-family:var(--font-body); text-transform:none; font-size:13.5px; color:#E4E9ED;
  border-radius:2px;
}
.dropdown a:hover{ background:rgba(255,255,255,0.06); color:#fff; }
.dropdown a span.n{ font-family:var(--font-mono); font-size:10.5px; color:var(--sand); }
.header-cta{ display:flex; align-items:center; gap:12px; }
.burger{ display:none; }

@media (max-width:980px){
  nav.main-nav{ display:none; }
  .header-cta .btn-ghost{ display:none; }
  .burger{
    display:flex; width:40px; height:40px; border:1px solid rgba(255,255,255,0.3);
    color:#fff; align-items:center; justify-content:center; font-family:var(--font-mono);
  }
}

/* ---------- hero ---------- */
.hero{
  position:relative; background:var(--navy); color:#fff; overflow:hidden;
  padding:120px 0 90px;
}
.hero-grid{
  position:absolute; inset:0; opacity:0.35;
  background-image:
    linear-gradient(rgba(127,176,214,0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127,176,214,0.14) 1px, transparent 1px);
  background-size:46px 46px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,0.9), rgba(0,0,0,0.15));
}
.hero-photo{
  position:absolute; inset:0;
  background:linear-gradient(100deg, rgba(10,26,43,0.97) 18%, rgba(10,26,43,0.78) 55%, rgba(10,26,43,0.55) 100%),
    url('https://images.unsplash.com/photo-1581094288338-2314dddb7ece?q=80&w=1800&auto=format&fit=crop') center/cover;
}
.hero-line{
  position:absolute; right:0; top:0; bottom:0; width:42%;
  background:url('https://images.unsplash.com/photo-1565008447742-97f6f38c985c?q=80&w=1400&auto=format&fit=crop') center/cover;
  -webkit-mask-image:linear-gradient(90deg, transparent, rgba(0,0,0,0.85) 35%);
  mask-image:linear-gradient(90deg, transparent, rgba(0,0,0,0.85) 35%);
  opacity:0.55;
}
.hero .wrap{ position:relative; z-index:2; }
.hero-frame{
  border:1px solid rgba(255,255,255,0.14);
  padding:38px 40px 40px;
  max-width:760px;
  position:relative;
}
.hero-frame::before, .hero-frame::after{
  content:""; position:absolute; width:14px; height:14px; border:1.5px solid var(--sand);
}
.hero-frame::before{ top:-1px; left:-1px; border-right:none; border-bottom:none; }
.hero-frame::after{ bottom:-1px; right:-1px; border-left:none; border-top:none; }
.hero h1{
  color:#fff; font-size:clamp(34px, 4.6vw, 56px); line-height:1.08; margin:18px 0 22px;
}
.hero h1 em{ font-style:normal; color:var(--sand-light); }
.hero p.lead{
  font-size:17px; color:#C5D2DB; max-width:600px; margin-bottom:30px; line-height:1.7;
}
.hero-ctas{ display:flex; flex-wrap:wrap; gap:14px; }
.hero-strip{
  margin-top:54px; border-top:1px solid rgba(255,255,255,0.14);
  padding-top:22px; display:grid; grid-template-columns:repeat(6,1fr); gap:18px;
}
.hero-strip .item{
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:0.03em; color:#9FB3C0;
  border-left:1px solid rgba(255,255,255,0.18); padding-left:12px; line-height:1.5;
}
@media (max-width:980px){ .hero-strip{ grid-template-columns:repeat(2,1fr); } .hero-line{ display:none; } }
@media (max-width:640px){ .hero{ padding:90px 0 60px; } .hero-frame{ padding:26px 22px 28px; } }

/* ---------- section scaffolding ---------- */
section{ position:relative; }
.section-pad{ padding:96px 0; }
@media (max-width:720px){ .section-pad{ padding:64px 0; } }
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end;
  gap:30px; margin-bottom:52px; flex-wrap:wrap;
}
.section-head h2{ font-size:clamp(26px,3vw,38px); margin-top:14px; max-width:640px; }
.section-head .desc{ max-width:380px; color:var(--slate); font-size:15px; padding-bottom:4px; }
.dark{ background:var(--navy); color:#fff; }
.dark h2,.dark h3,.dark h4{ color:#fff; }
.dark .desc{ color:#A9B9C4; }
.alt{ background:var(--paper-2); }

.dwg-tag{
  position:absolute; right:28px; top:28px;
  font-family:var(--font-mono); font-size:10.5px; color:var(--slate-soft);
  text-align:right; line-height:1.6; letter-spacing:0.04em;
  border-right:1px solid var(--line); padding-right:10px;
  display:none;
}
.dark .dwg-tag{ color:#5E7686; border-color:rgba(255,255,255,0.15); }
@media (min-width:980px){ .dwg-tag{ display:block; } }

/* ---------- cards ---------- */
.grid{ display:grid; gap:24px; }
.g-3{ grid-template-columns:repeat(3,1fr); }
.g-4{ grid-template-columns:repeat(4,1fr); }
.g-2{ grid-template-columns:repeat(2,1fr); }
@media (max-width:980px){ .g-3,.g-4{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:640px){ .g-3,.g-4,.g-2{ grid-template-columns:1fr; } }

.card{
  background:#fff; border:1px solid var(--line); padding:30px 26px;
  transition:all .25s ease; position:relative;
}
.card:hover{ border-color:var(--sand); transform:translateY(-3px); box-shadow:0 22px 40px rgba(10,26,43,0.08); }
.card .num{ font-family:var(--font-mono); font-size:12px; color:var(--sand); margin-bottom:16px; display:block; }
.card h3{ font-size:19px; margin-bottom:10px; }
.card p{ font-size:14.5px; color:var(--slate); line-height:1.65; }
.card ul{ margin-top:14px; }
.card ul li{
  font-size:13.5px; color:var(--slate); padding:6px 0 6px 16px; position:relative;
  border-top:1px dashed var(--line);
}
.card ul li:first-child{ border-top:none; }
.card ul li::before{ content:"—"; position:absolute; left:0; color:var(--sand); }
.card-link{
  margin-top:18px; display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:12px; text-transform:uppercase; color:var(--steel);
  letter-spacing:0.05em;
}
.card:hover .card-link{ color:var(--navy); }

.card-dark{ background:var(--navy-2); border:1px solid rgba(255,255,255,0.08); color:#fff; }
.card-dark h3{ color:#fff; }
.card-dark p{ color:#A9B9C4; }
.card-dark:hover{ border-color:var(--sand); }

/* industries */
.ind-card{
  border:1px solid var(--line); background:#fff; padding:24px;
}
.ind-card .tag{ display:block; margin-bottom:10px; }
.ind-card h3{ font-size:17px; margin-bottom:8px; }
.ind-card p{ font-size:13.5px; color:var(--slate); }

/* process */
.process{ display:flex; gap:0; flex-wrap:wrap; }
.process .step{
  flex:1; min-width:180px; padding:26px 22px; border-top:2px solid var(--sand);
  position:relative;
}
.process .step + .step{ border-left:1px solid rgba(255,255,255,0.1); }
.process .step .idx{ font-family:var(--font-mono); color:var(--sand); font-size:13px; }
.process .step h4{ color:#fff; font-size:16px; margin:10px 0 8px; }
.process .step p{ color:#9FB3C0; font-size:13px; line-height:1.6; }
@media (max-width:900px){ .process{ flex-direction:column; } .process .step + .step{ border-left:none; border-top:1px solid rgba(255,255,255,0.1);} }

/* stats */
.stats{ display:flex; gap:0; border:1px solid var(--line); }
.stat{ flex:1; padding:26px 24px; border-left:1px solid var(--line); }
.stat:first-child{ border-left:none; }
.stat .v{ font-family:var(--font-display); font-size:34px; color:var(--navy); font-weight:700; }
.stat .l{ font-family:var(--font-mono); font-size:11px; color:var(--slate); letter-spacing:0.04em; margin-top:6px; text-transform:uppercase; }
@media (max-width:720px){ .stats{ flex-wrap:wrap; } .stat{ flex:1 1 50%; border-left:none; border-top:1px solid var(--line);} }

/* cta band */
.cta-band{
  background:var(--navy); color:#fff; padding:64px 0; position:relative; overflow:hidden;
  border-top:1px solid rgba(255,255,255,0.08);
}
.cta-band::before{
  content:""; position:absolute; inset:0;
  background-image:linear-gradient(rgba(127,176,214,0.1) 1px, transparent 1px),linear-gradient(90deg, rgba(127,176,214,0.1) 1px, transparent 1px);
  background-size:40px 40px; mask-image:radial-gradient(circle at 80% 50%, black, transparent 70%);
}
.cta-band .wrap{ position:relative; z-index:2; display:flex; justify-content:space-between; align-items:center; gap:30px; flex-wrap:wrap; }
.cta-band h2{ color:#fff; font-size:clamp(24px,3vw,32px); max-width:560px; }
.cta-band .actions{ display:flex; gap:14px; flex-wrap:wrap; }

/* coverage map strip */
.coverage{ display:flex; flex-wrap:wrap; gap:14px; }
.coverage span{
  font-family:var(--font-mono); font-size:12.5px; padding:10px 16px;
  border:1px solid var(--line); color:var(--slate);
}

/* forms */
.form-shell{
  background:#fff; border:1px solid var(--line); padding:44px;
}
@media (max-width:640px){ .form-shell{ padding:26px; } }
.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:18px; margin-bottom:18px; }
@media (max-width:640px){ .form-row{ grid-template-columns:1fr; } }
.field label{
  display:block; font-family:var(--font-mono); font-size:11px; text-transform:uppercase;
  letter-spacing:0.06em; color:var(--slate); margin-bottom:8px;
}
.field input, .field select, .field textarea{
  width:100%; border:1px solid var(--line); background:var(--paper); padding:13px 14px;
  font-family:var(--font-body); font-size:14.5px; color:var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color:var(--steel); background:#fff;
}
.field textarea{ resize:vertical; min-height:110px; }
.upload{
  border:1.5px dashed var(--line); padding:30px; text-align:center; cursor:pointer;
  font-family:var(--font-mono); font-size:13px; color:var(--slate); margin-bottom:18px;
  transition:border-color .2s ease;
}
.upload:hover{ border-color:var(--sand); }
.upload strong{ color:var(--navy); display:block; margin-bottom:6px; font-family:var(--font-body); font-size:14.5px;}
.radio-row{ display:flex; gap:22px; flex-wrap:wrap; margin-bottom:22px; }
.radio-opt{ display:flex; align-items:center; gap:8px; font-size:13.5px; color:var(--slate); }
.form-note{ font-size:12.5px; color:var(--slate-soft); margin-top:14px; }
.form-success{
  display:none; border:1px solid var(--ok); background:#F0F7F2; padding:18px 20px;
  font-size:14px; color:#2E5C40; margin-bottom:20px;
}

/* footer */
footer{ background:var(--navy); color:#9FB3C0; padding:70px 0 0; }
.foot-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:40px; padding-bottom:50px; border-bottom:1px solid rgba(255,255,255,0.1); }
@media (max-width:840px){ .foot-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .foot-grid{ grid-template-columns:1fr; } }
.foot-grid h4{ color:#fff; font-size:13px; font-family:var(--font-mono); text-transform:uppercase; letter-spacing:0.06em; margin-bottom:18px; }
.foot-grid li{ margin-bottom:10px; font-size:14px; }
.foot-grid li a:hover{ color:#fff; }
.foot-bottom{ display:flex; justify-content:space-between; padding:24px 0; font-size:12.5px; flex-wrap:wrap; gap:10px; }
.foot-bottom a:hover{ color:#fff; }

/* floating */
.float-wa{
  position:fixed; bottom:26px; right:26px; z-index:200;
  width:58px; height:58px; border-radius:50%; background:#1F3D2E;
  display:flex; align-items:center; justify-content:center; box-shadow:0 14px 30px rgba(0,0,0,0.35);
  border:1px solid rgba(255,255,255,0.15);
}
.float-wa:hover{ background:#28503B; }
.sticky-rfq{
  position:fixed; bottom:26px; left:26px; z-index:200; display:none;
}
@media (min-width:1080px){ .sticky-rfq{ display:block; } }

/* reveal animation */
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .7s ease, transform .7s ease; }
.reveal.in{ opacity:1; transform:translateY(0); }

/* breadcrumb / page hero (inner pages) */
.page-hero{
  background:var(--navy); color:#fff; padding:160px 0 70px; position:relative; overflow:hidden;
}
.page-hero .crumb{ font-family:var(--font-mono); font-size:12px; color:var(--steel-light); margin-bottom:16px; letter-spacing:0.04em; }
.page-hero h1{ color:#fff; font-size:clamp(30px,4vw,46px); max-width:760px; }
.page-hero p{ color:#B9C7D1; margin-top:18px; max-width:600px; font-size:16px; }

.kicker-list{ display:flex; gap:10px; flex-wrap:wrap; margin-top:26px; }
.kicker-list span{
  font-family:var(--font-mono); font-size:11.5px; padding:8px 14px; border:1px solid rgba(255,255,255,0.22); color:#D7E1E8;
}

.two-col{ display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:flex-start; }
@media (max-width:880px){ .two-col{ grid-template-columns:1fr; gap:36px; } }

.check-list li{
  padding:10px 0 10px 28px; position:relative; font-size:15px; color:var(--slate); border-top:1px solid var(--line);
}
.check-list li:first-child{ border-top:none; }
.check-list li::before{ content:"✓"; position:absolute; left:0; color:var(--ok); font-weight:700; }

.table-spec{ width:100%; border-collapse:collapse; }
.table-spec th, .table-spec td{ text-align:left; padding:13px 16px; border-bottom:1px solid var(--line); font-size:14px; }
.table-spec th{ font-family:var(--font-mono); font-size:11px; text-transform:uppercase; color:var(--slate); letter-spacing:0.05em; }

.breadcrumb-bar{ background:var(--paper-2); border-bottom:1px solid var(--line); padding:14px 0; }
.breadcrumb-bar .wrap{ font-family:var(--font-mono); font-size:12px; color:var(--slate); }
.breadcrumb-bar a:hover{ color:var(--steel); }