/* ============================================================
   TERMOTECH — Pre-insulated composite piping systems
   Design system: industrial & robust / clean & technical
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;500;600;700;800;900&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* brand */
  --brand:        #E63E2A;   /* TERMOTECH ring red-orange */
  --brand-ink:    #c12f1c;
  --brand-tint:   #fbeae6;
  --amber:        #E0A11C;   /* PUR foam */
  --amber-soft:   #f0d9a3;

  /* steel neutrals (cool) */
  --ink:      #15171b;
  --steel-1:  #21252b;
  --steel-2:  #3a3f47;
  --steel-3:  #5b626c;
  --steel-4:  #878d96;
  --steel-5:  #b9bdc3;
  --steel-6:  #d7dadd;
  --line:     #e3e5e8;
  --line-2:   #ced2d6;
  --paper:    #f4f5f6;
  --paper-2:  #eceef0;
  --white:    #ffffff;

  --ink-line: rgba(255,255,255,.12);
  --ink-line-2: rgba(255,255,255,.07);

  /* type */
  --sans: 'Archivo', system-ui, -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', monospace;

  --maxw: 1280px;
  --pad: clamp(20px, 5vw, 64px);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--white);
  line-height:1.55;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; cursor:pointer; }

/* ---------- layout ---------- */
.wrap{ max-width:var(--maxw); margin:0 auto; padding-inline:var(--pad); }
.section{ padding-block:clamp(64px,9vw,128px); }
.rule{ border:0; border-top:1px solid var(--line); }

/* ---------- type utilities ---------- */
.mono{ font-family:var(--mono); }
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--brand);
  font-weight:500;
  display:inline-flex; align-items:center; gap:10px;
}
.eyebrow::before{
  content:""; width:22px; height:1px; background:var(--brand); display:inline-block;
}
.eyebrow.muted{ color:var(--steel-4); }
.eyebrow.muted::before{ background:var(--steel-4); }

h1,h2,h3,h4{ font-weight:800; line-height:1.04; letter-spacing:-.02em; }
.display{ font-size:clamp(44px,7vw,104px); font-weight:900; letter-spacing:-.035em; line-height:.95; }
.h2{ font-size:clamp(30px,4vw,52px); }
.h3{ font-size:clamp(22px,2.4vw,30px); }
.lead{ font-size:clamp(18px,1.6vw,21px); color:var(--steel-2); line-height:1.5; max-width:62ch; }
.small{ font-size:14px; }
.measure{ max-width:64ch; }

/* section header block */
.shead{ display:flex; flex-direction:column; gap:18px; max-width:760px; }
.shead .eyebrow{ margin-bottom:2px; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-weight:700; font-size:15px; letter-spacing:.01em;
  padding:14px 22px; border:1px solid transparent; border-radius:0;
  transition:.16s ease; white-space:nowrap;
}
.btn .ar{ font-family:var(--mono); font-weight:500; transition:transform .18s ease; }
.btn:hover .ar{ transform:translateX(4px); }
.btn--brand{ background:var(--brand); color:#fff; }
.btn--brand:hover{ background:var(--brand-ink); }
.btn--ink{ background:var(--ink); color:#fff; }
.btn--ink:hover{ background:var(--steel-2); }
.btn--ghost{ background:transparent; color:var(--ink); border-color:var(--line-2); }
.btn--ghost:hover{ border-color:var(--ink); }
.btn--ghost-light{ background:transparent; color:#fff; border-color:var(--ink-line); }
.btn--ghost-light:hover{ border-color:#fff; }

/* ---------- chips / tags ---------- */
.chip{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:12.5px; font-weight:500;
  letter-spacing:.04em; color:var(--steel-2);
  border:1px solid var(--line-2); padding:7px 12px; background:var(--white);
}
.chip .dot{ width:7px; height:7px; border-radius:50%; background:var(--brand); }
.chip--amber .dot{ background:var(--amber); }
.chip--steel .dot{ background:var(--steel-4); }

/* ---------- top utility bar ---------- */
.ticker{
  background:var(--ink); color:var(--steel-5);
  font-family:var(--mono); font-size:12px; letter-spacing:.05em;
  border-bottom:1px solid var(--ink-line-2);
}
.ticker .wrap{ display:flex; align-items:center; gap:28px; height:38px; overflow:hidden; white-space:nowrap; }
.ticker b{ color:#fff; font-weight:600; }
.ticker .sep{ color:var(--steel-3); }
.ticker .right{ margin-left:auto; display:flex; gap:24px; }
.ticker a:hover{ color:#fff; }

/* ---------- header / nav ---------- */
.site-head{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.86); backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{ display:flex; align-items:center; gap:32px; height:74px; }
.brand-logo{ height:30px; width:auto; }
.nav-links{ display:flex; align-items:center; gap:30px; margin-left:14px; }
.nav-links a{
  font-size:14.5px; font-weight:600; color:var(--steel-2);
  letter-spacing:.005em; position:relative; padding:4px 0;
}
.nav-links a:hover{ color:var(--ink); }
.nav-links a.active{ color:var(--ink); }
.nav-cta{ margin-left:auto; display:flex; align-items:center; gap:18px; }
.nav-search{
  font-family:var(--mono); font-size:12.5px; color:var(--steel-3);
  display:flex; align-items:center; gap:9px; border:1px solid var(--line);
  padding:9px 14px; min-width:160px;
}
.nav-search:hover{ border-color:var(--line-2); color:var(--steel-2); }
.nav-toggle{ display:none; }

/* ---------- footer ---------- */
.site-foot{ background:var(--ink); color:var(--steel-5); }
.site-foot a{ color:var(--steel-5); }
.site-foot a:hover{ color:#fff; }
.foot-grid{
  display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:48px;
  padding-block:72px 56px;
}
.foot-logo{ height:30px; margin-bottom:22px; }
.foot-col h5{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--steel-4); font-weight:500; margin-bottom:18px;
}
.foot-col ul{ list-style:none; display:flex; flex-direction:column; gap:11px; font-size:14.5px; }
.foot-bar{
  border-top:1px solid var(--ink-line); padding-block:26px;
  display:flex; align-items:center; gap:20px; flex-wrap:wrap;
  font-family:var(--mono); font-size:12px; color:var(--steel-4); letter-spacing:.04em;
}
.foot-bar .right{ margin-left:auto; display:flex; gap:22px; }

/* ---------- generic grid helpers ---------- */
.grid{ display:grid; gap:24px; }
.cols-2{ grid-template-columns:repeat(2,1fr); }
.cols-3{ grid-template-columns:repeat(3,1fr); }
.cols-4{ grid-template-columns:repeat(4,1fr); }

/* ---------- spec table ---------- */
.spec{ width:100%; border-collapse:collapse; font-size:14.5px; }
.spec th, .spec td{ text-align:left; padding:13px 16px; border-bottom:1px solid var(--line); }
.spec thead th{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--steel-3); font-weight:500; background:var(--paper);
}
.spec td.num, .spec th.num{ font-family:var(--mono); text-align:right; }
.spec tbody tr:hover{ background:var(--paper); }
.spec tbody td:first-child{ font-weight:600; }

/* parameter list */
.params{ list-style:none; }
.params li{
  display:flex; justify-content:space-between; gap:24px; align-items:baseline;
  padding:15px 0; border-bottom:1px solid var(--line);
}
.params .k{ color:var(--steel-3); font-size:14.5px; }
.params .v{ font-family:var(--mono); font-weight:500; font-size:15px; text-align:right; }
.params .v small{ color:var(--steel-4); font-weight:400; }

/* ---------- cross-section legend dot ---------- */
.layer-key{ display:inline-block; width:12px; height:12px; border-radius:3px; flex:none; }

/* ---------- reveal animation ---------- */
@media (prefers-reduced-motion:no-preference){
  .reveal{ opacity:0; transform:translateY(22px); transition:opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
  .reveal.in{ opacity:1; transform:none; }
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .foot-grid{ grid-template-columns:1fr 1fr; gap:40px; }
  .cols-4{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width:820px){
  body{ font-size:16px; }
  .nav-links, .nav-search, .ticker .right{ display:none; }
  .nav-toggle{ display:inline-flex; }
  .cols-3{ grid-template-columns:1fr; }
  .cols-2{ grid-template-columns:1fr; }
  .foot-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:520px){
  .cols-4{ grid-template-columns:1fr; }
  .foot-grid{ grid-template-columns:1fr; }
}