/* =========================================================
   INTER PIPE & CABLE — design tokens
   Palette: industrial blueprint, not the generic cream/terracotta
   ========================================================= */
:root{
  --navy-deep:   #0E1C2E;   /* darkest ink, headers/footer */
  --navy:        #16324A;   /* section backgrounds */
  --steel:       #3E6E92;   /* mid blue, lines, secondary text on dark */
  --steel-pale:  #CFE1EC;   /* pale blue tint */
  --signal:      #E3590C;   /* safety-conduit orange, the one bold accent */
  --signal-dark: #B8440A;
  --concrete:    #F1EFEA;   /* page background, cool off-white */
  --panel:       #FFFFFF;
  --ink:         #17191C;   /* body text */
  --ink-soft:    #52585F;
  --line:        #D8D3C8;   /* hairline border on light bg */
  --line-dark:   rgba(255,255,255,.18);
  --radius: 2px;
  --maxw: 1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--concrete);
  color:var(--ink);
  font-family:'Sarabun',-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
}
h1,h2,h3,h4{
  font-family:'Kanit',sans-serif;
  color:var(--navy-deep);
  margin:0 0 .5em;
  line-height:1.25;
  font-weight:600;
  letter-spacing:.2px;
}
h1{font-size:clamp(2rem,4.5vw,3.1rem); font-weight:700}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.2rem}
p{margin:0 0 1.1em; max-width:68ch; color:var(--ink-soft)}
a{color:inherit}
img{max-width:100%;display:block}
.container{max-width:var(--maxw); margin:0 auto; padding:0 24px}
.hidden-mobile{display:block}

/* ---------- Focus & motion ---------- */
a:focus-visible, button:focus-visible{outline:3px solid var(--signal); outline-offset:2px}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important; transition:none !important; scroll-behavior:auto !important}
}

/* ---------- Header ---------- */
.site-header{
  background:var(--navy-deep);
  color:#fff;
  position:sticky; top:0; z-index:50;
  border-bottom:3px solid var(--signal);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  height:78px;
}
.brand{display:flex; align-items:center; gap:12px; text-decoration:none; color:#fff}
.brand-mark{
  width:40px;height:40px; flex:0 0 auto;
  border:2px solid var(--signal);
  display:flex; align-items:center; justify-content:center;
  font-family:'Kanit',sans-serif; font-weight:700; color:var(--signal);
  font-size:1rem;
}
.brand-name{font-family:'Kanit',sans-serif; font-weight:600; line-height:1.2}
.brand-name small{display:block; font-family:'Sarabun',sans-serif; font-weight:400; font-size:.72rem; color:var(--steel-pale); letter-spacing:.5px}

nav.main-nav ul{list-style:none; display:flex; gap:2px; margin:0; padding:0}
nav.main-nav a{
  display:block; padding:10px 16px; text-decoration:none;
  font-family:'Kanit',sans-serif; font-size:.95rem; font-weight:500;
  color:var(--steel-pale);
  border-bottom:3px solid transparent;
  transition:color .15s, border-color .15s;
}
nav.main-nav a:hover, nav.main-nav a[aria-current="page"]{
  color:#fff; border-color:var(--signal);
}
.nav-toggle{display:none; background:none; border:1px solid var(--line-dark); color:#fff; padding:8px 12px; font-size:1.3rem; cursor:pointer}

/* ---------- Hero / banner ---------- */
.hero{
  position:relative; overflow:hidden;
  background:var(--navy-deep);
  color:#fff;
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(14,28,46,.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14,28,46,.15) 1px, transparent 1px);
  background-size:38px 38px;
  opacity:.25;
  pointer-events:none;
}
.hero-grid{
  position:relative; z-index:2;
  display:grid; grid-template-columns:1.05fr .95fr; gap:40px;
  align-items:center;
  padding:64px 0 56px;
}
.hero-tag{
  display:inline-flex; align-items:center; gap:8px;
  font-family:'Kanit',sans-serif; font-size:.82rem; font-weight:500;
  color:var(--signal); border:1px solid var(--signal); padding:5px 12px;
  margin-bottom:20px;
}
.hero h1{color:#fff; max-width:14ch}
.hero p.lead{color:var(--steel-pale); font-size:1.08rem; max-width:46ch}
.hero-actions{display:flex; gap:14px; margin-top:28px; flex-wrap:wrap}
.hero-figure{
  position:relative;
  border:1px solid var(--line-dark);
}
.hero-figure img{width:100%; height:420px; object-fit:cover; filter:saturate(.92) contrast(1.03)}
.hero-figure::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(14,28,46,0) 45%, rgba(14,28,46,.55) 100%);
}
.hero-figure figcaption{
  position:absolute; left:14px; bottom:12px; z-index:2;
  font-family:'Kanit',sans-serif; font-size:.78rem; color:var(--steel-pale);
  letter-spacing:.3px;
}
.corner{position:relative}
.corner::before,.corner::after{
  content:""; position:absolute; width:16px; height:16px;
  border-color:var(--signal); border-style:solid; z-index:3;
}
.corner::before{top:-1px; left:-1px; border-width:2px 0 0 2px}
.corner::after{bottom:-1px; right:-1px; border-width:0 2px 2px 0}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:'Kanit',sans-serif; font-weight:500; font-size:.95rem;
  padding:13px 26px; text-decoration:none; border:1px solid transparent;
  cursor:pointer; transition:background .15s, color .15s, border-color .15s;
}
.btn-primary{background:var(--signal); color:#fff}
.btn-primary:hover{background:var(--signal-dark)}
.btn-outline{border-color:var(--steel-pale); color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.08)}
.btn-dark{border-color:var(--navy-deep); color:var(--navy-deep)}
.btn-dark:hover{background:var(--navy-deep); color:#fff}

/* ---------- Sections ---------- */
section{padding:72px 0}
.section-navy{background:var(--navy); color:#fff}
.section-navy p{color:var(--steel-pale)}
.section-navy h2{color:#fff}
.section-head{max-width:60ch; margin-bottom:44px}
.eyebrow{
  font-family:'Kanit',sans-serif; font-size:.78rem; font-weight:500;
  color:var(--signal); display:flex; align-items:center; gap:10px; margin-bottom:14px;
}
.eyebrow::before{content:""; width:26px; height:2px; background:var(--signal)}

/* ---------- Panels / grids ---------- */
.grid{display:grid; gap:1px; background:var(--line)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.panel{
  background:var(--panel); padding:30px 28px;
}
.section-navy .panel{background:#132A40}
.panel h3{margin-bottom:10px}
.panel .idx{
  font-family:'Kanit',sans-serif; font-size:.78rem; color:var(--steel);
  border:1px solid var(--steel); display:inline-block; padding:2px 9px; margin-bottom:16px;
}
.panel-figure{margin:-30px -28px 20px; overflow:hidden; height:170px}
.panel-figure img{width:100%; height:100%; object-fit:cover}

/* Steps (a genuine sequence) */
.steps{counter-reset:step; display:grid; grid-template-columns:repeat(4,1fr); gap:0; border:1px solid var(--line)}
.step{padding:28px 24px; border-left:1px solid var(--line); position:relative}
.step:first-child{border-left:none}
.step .num{
  counter-increment:step; font-family:'Kanit',sans-serif; font-weight:700; font-size:1.7rem;
  color:var(--signal); display:block; margin-bottom:10px;
}
.step .num::before{content: counter(step, decimal-leading-zero)}

/* Two-col text+image */
.split{display:grid; grid-template-columns:1fr 1fr; gap:52px; align-items:center}
.split img{border:1px solid var(--line)}
.split.reverse .split-media{order:2}

/* Stat strip */
.stats{display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid var(--line-dark); border-bottom:1px solid var(--line-dark)}
.stat{padding:26px 20px; text-align:left; border-left:1px solid var(--line-dark)}
.stat:first-child{border-left:none}
.stat b{display:block; font-family:'Kanit',sans-serif; font-size:2rem; color:var(--signal)}
.stat span{font-size:.9rem; color:var(--steel-pale)}

/* Callout / CTA band */
.cta-band{
  background:var(--navy-deep); color:#fff;
  padding:56px 0; text-align:left;
}
.cta-band .container{display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap}
.cta-band h2{color:#fff; margin-bottom:6px}
.cta-band p{color:var(--steel-pale); margin:0}

/* Table (specs / policy) */
table.speclike{width:100%; border-collapse:collapse; margin:0 0 1.5em}
table.speclike th, table.speclike td{
  text-align:left; padding:12px 14px; border-bottom:1px solid var(--line); vertical-align:top;
}
table.speclike th{
  font-family:'Kanit',sans-serif; font-weight:500; color:var(--navy); width:220px; font-size:.92rem;
}

/* Contact page */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:0; border:1px solid var(--line)}
.contact-info{padding:40px; background:var(--panel)}
.contact-info dl{margin:0}
.contact-info dt{font-family:'Kanit',sans-serif; font-size:.8rem; color:var(--steel); margin-top:20px}
.contact-info dt:first-child{margin-top:0}
.contact-info dd{margin:4px 0 0; font-size:1.05rem}
.map-embed{min-height:100%; border-left:1px solid var(--line)}
.map-embed iframe{width:100%; height:100%; min-height:420px; border:0; display:block}

/* Form */
.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:18px}
.form-grid .full{grid-column:1/-1}
label{display:block; font-family:'Kanit',sans-serif; font-size:.85rem; margin-bottom:6px; color:var(--navy)}
input,textarea,select{
  width:100%; padding:12px 14px; border:1px solid var(--line); background:#fff;
  font-family:'Sarabun',sans-serif; font-size:1rem; color:var(--ink);
}
input:focus,textarea:focus,select:focus{outline:2px solid var(--signal); border-color:var(--signal)}
textarea{resize:vertical; min-height:130px}

/* Breadcrumb / page header for inner pages */
.page-header{background:var(--navy-deep); color:#fff; padding:52px 0 40px; border-bottom:3px solid var(--signal)}
.page-header p{color:var(--steel-pale); max-width:60ch}
.page-header h1{color:#fff}

/* Footer */
footer.site-footer{background:var(--navy-deep); color:var(--steel-pale); padding:56px 0 24px; font-size:.94rem}
.footer-grid{display:grid; grid-template-columns:2fr 1fr 1fr 1.2fr; gap:32px; padding-bottom:36px; border-bottom:1px solid var(--line-dark)}
.footer-grid h4{color:#fff; font-family:'Kanit',sans-serif; font-size:.95rem; margin-bottom:16px}
.footer-grid ul{list-style:none; margin:0; padding:0}
.footer-grid li{margin-bottom:9px}
.footer-grid a{text-decoration:none; color:var(--steel-pale)}
.footer-grid a:hover{color:#fff}
.footer-bottom{display:flex; justify-content:space-between; padding-top:20px; font-size:.82rem; flex-wrap:wrap; gap:10px; color:var(--steel)}

/* Utility */
.tag-list{display:flex; gap:10px; flex-wrap:wrap; margin-bottom:8px}
.tag{border:1px solid var(--line); font-family:'Kanit',sans-serif; font-size:.78rem; padding:4px 10px; color:var(--ink-soft)}

/* ---------- Responsive ---------- */
@media (max-width: 980px){
  .hero-grid{grid-template-columns:1fr}
  .hero-figure img{height:280px}
  .grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .grid.cols-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step{border-left:none; border-top:1px solid var(--line)}
  .step:first-child{border-top:none}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-left:none}
  .stat:nth-child(odd){border-left:none}
  .split{grid-template-columns:1fr}
  .split.reverse .split-media{order:0}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width: 680px){
  nav.main-nav{
    position:fixed; inset:78px 0 0 0; background:var(--navy-deep);
    display:none; padding:10px 0; border-top:1px solid var(--line-dark);
  }
  nav.main-nav.open{display:block}
  nav.main-nav ul{flex-direction:column}
  nav.main-nav a{padding:16px 24px; border-bottom:1px solid var(--line-dark)}
  .nav-toggle{display:block}
  .grid.cols-4, .grid.cols-3, .grid.cols-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band .container{flex-direction:column; align-items:flex-start}
  .form-grid{grid-template-columns:1fr}
}