/* Layout: engineering-drawing feel. Cool steel paper, ink lines, one forge-heat accent.
   Wide left-aligned text column + drawing panels; title-block labels in mono. */
:root {
  --paper: #f4f6f8;
  --panel: #ffffff;
  --ink: #14212d;
  --steel: #2b4a64;
  --muted: #586977;
  --line: #d3dbe2;
  --grid: #e6ebf0;
  --heat: #d9631c;
  --heat-soft: #fbe9dc;
  --on-heat: #ffffff;
  --ok: #1f7a4d;
  --bad: #b3261e;
  --display: "Barlow Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "IBM Plex Mono", Consolas, "Courier New", monospace;
  --wrap: 1160px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0e151c; --panel: #141e27; --ink: #e5ecf2; --steel: #93b6d3; --muted: #97a7b5;
    --line: #26343f; --grid: #18232d; --heat: #f08a3c; --heat-soft: #3a2414; --on-heat: #1a0f06;
    --ok: #5cc28e; --bad: #f28b82; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0e151c; --panel: #141e27; --ink: #e5ecf2; --steel: #93b6d3; --muted: #97a7b5;
  --line: #26343f; --grid: #18232d; --heat: #f08a3c; --heat-soft: #3a2414; --on-heat: #1a0f06;
  --ok: #5cc28e; --bad: #f28b82; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 16px/1.6 var(--body);
}
img, svg { max-width: 100%; }
a { color: var(--steel); }
a:hover { color: var(--heat); }
:focus-visible { outline: 2px solid var(--heat); outline-offset: 2px; }

.wrap {
  max-width: var(--wrap); margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.05; letter-spacing: .005em; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.1rem); }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); }
h3 { font-size: 1.45rem; font-weight: 600; }
p { margin: 0; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.label {
  font: 500 .74rem/1.2 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
}
.label.heat { color: var(--heat); }

/* Header */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--panel); }
.site-head {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: var(--panel); border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand svg { flex: none; width: 40px; height: 40px; }
.brand b { font: 700 1.3rem/1 var(--display); letter-spacing: .02em; display: block; }
.brand small { font: 500 .66rem/1.3 var(--mono); letter-spacing: .14em; color: var(--muted); text-transform: uppercase; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a {
  text-decoration: none; color: var(--ink); font-weight: 500; font-size: .95rem;
  padding: 8px 12px; border-radius: 4px;
}
.nav a:hover { background: var(--grid); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--heat); }
.nav .btn { margin-left: 8px; }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 4px; padding: 8px 10px; color: var(--ink); font: 500 .85rem var(--mono); cursor: pointer; }
@media (max-width: 860px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch;
         background: var(--panel); border-bottom: 1px solid var(--line); padding: 8px max(16px, env(safe-area-inset-right, 0px)) 16px max(16px, env(safe-area-inset-left, 0px)); }
  .nav.open { display: flex; }
  .nav a { padding: 12px; }
  .nav .btn { margin: 8px 0 0; text-align: center; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 1rem/1 var(--body); text-decoration: none; cursor: pointer;
  padding: 14px 22px; border-radius: 4px; border: 1.5px solid transparent;
}
.btn-heat { background: var(--heat); color: var(--on-heat); }
.btn-heat:hover { filter: brightness(1.08); color: var(--on-heat); }
.btn-line { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-line:hover { background: var(--ink); color: var(--paper); }
.nav .btn-heat { padding: 10px 16px; color: var(--on-heat); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* Sections */
.section { padding-block: clamp(56px, 8vw, 96px); }
.section + .section { border-top: 1px solid var(--line); }
.sec-head { display: grid; gap: 14px; margin-bottom: 40px; max-width: 760px; }
.blueprint {
  background-color: var(--paper);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Hero */
.hero { padding-block: clamp(40px, 7vw, 88px); border-bottom: 1px solid var(--line); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.hero-text { display: grid; gap: 22px; min-width: 0; }
.hero h1 em { font-style: normal; color: var(--heat); }
.drawing {
  background: var(--panel); border: 1.5px solid var(--ink); min-width: 0;
}
.drawing svg { display: block; width: 100%; height: auto; }
.title-block { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1.5px solid var(--ink); }
.title-block div { padding: 8px 10px; border-left: 1px solid var(--line); min-width: 0; }
.title-block div:first-child { border-left: 0; }
.title-block span { display: block; font: 500 .62rem/1.2 var(--mono); letter-spacing: .1em; color: var(--muted); text-transform: uppercase; }
.title-block b { display: block; font: 500 .82rem/1.4 var(--mono); color: var(--ink); overflow-wrap: anywhere; }
.d-line { stroke: var(--ink); fill: none; stroke-width: 2; }
.d-thin { stroke: var(--steel); fill: none; stroke-width: 1; }
.d-center { stroke: var(--steel); fill: none; stroke-width: 1; stroke-dasharray: 14 4 3 4; }
.d-fill { fill: var(--panel); stroke: var(--ink); stroke-width: 2; }
.d-hot { fill: var(--heat-soft); stroke: var(--heat); stroke-width: 2; }
.d-text { fill: var(--steel); font: 500 11px var(--mono); }
.d-heat-text { fill: var(--heat); font: 600 11px var(--mono); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }

/* Product grid */
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
a.cell:hover h3 { color: var(--heat); }
.cell { background: var(--panel); padding: 28px 26px; display: grid; gap: 12px; align-content: start; min-width: 0; }
.cell .tag { font: 500 .72rem/1 var(--mono); color: var(--heat); letter-spacing: .1em; }
.cell p { color: var(--muted); }
.cell ul { margin: 0; padding-left: 18px; color: var(--muted); }
.cell li + li { margin-top: 4px; }
@media (max-width: 900px) { .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid.cols-3, .grid.cols-4, .grid.cols-2 { grid-template-columns: 1fr; } }

/* Process route */
.route { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); counter-reset: step; }
.route li { position: relative; padding: 22px 18px 4px 0; border-top: 2px solid var(--ink); display: grid; gap: 8px; min-width: 0; }
.route li::before {
  counter-increment: step; content: "OP " counter(step, decimal-leading-zero);
  font: 600 .74rem/1 var(--mono); color: var(--heat); letter-spacing: .1em;
}
.route li::after { content: ""; position: absolute; top: -7px; left: 0; width: 12px; height: 12px; background: var(--heat); border-radius: 50%; }
.route b { font: 600 1.25rem/1.1 var(--display); }
.route p { color: var(--muted); font-size: .95rem; }
@media (max-width: 900px) { .route { grid-template-columns: 1fr; gap: 6px; } .route li { padding-right: 0; } }

/* Spec table */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); background: var(--panel); }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 500 .72rem/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); background: var(--grid); }
tr:last-child td { border-bottom: 0; }
td.mono { font-family: var(--mono); font-size: .88rem; white-space: nowrap; }

/* Two-column text */
.split { display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(28px, 5vw, 72px); }
.split > * { min-width: 0; }
.stack { display: grid; gap: 18px; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.checks li { display: grid; grid-template-columns: 22px 1fr; gap: 12px; }
.checks li::before { content: ""; width: 14px; height: 14px; margin-top: 6px; border: 2px solid var(--heat); transform: rotate(45deg); }
.checks b { display: block; }
.checks span { color: var(--muted); }
@media (max-width: 800px) { .split { grid-template-columns: 1fr; } }

/* Industry rows */
.ind { display: grid; grid-template-columns: 1fr; border-top: 1.5px solid var(--ink); }
.ind-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.ind-row h3 { font-size: 1.35rem; }
.ind-row p { color: var(--muted); }
@media (max-width: 640px) { .ind-row { grid-template-columns: 1fr; gap: 6px; } }

/* CTA band */
.cta { background: var(--ink); color: var(--paper); }
.cta .wrap { padding-block: clamp(44px, 6vw, 72px); display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; }
.cta h2 { color: var(--paper); max-width: 22ch; }
.cta p { color: color-mix(in srgb, var(--paper) 75%, transparent); margin-top: 10px; max-width: 52ch; }
.cta .btn-line { border-color: var(--paper); color: var(--paper); }
.cta .btn-line:hover { background: var(--paper); color: var(--ink); }

/* Page head */
.page-head { padding-block: clamp(40px, 6vw, 72px) clamp(28px, 4vw, 44px); border-bottom: 1px solid var(--line); }
.page-head .wrap { display: grid; gap: 16px; }

/* Contact + form */
.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(28px, 4vw, 56px); align-items: start; }
.contact-grid > * { min-width: 0; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
form.enq { background: var(--panel); border: 1.5px solid var(--ink); padding: clamp(20px, 3vw, 32px); display: grid; gap: 18px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .f-row { grid-template-columns: 1fr; } }
.field { display: grid; gap: 6px; min-width: 0; }
.field label { font: 500 .74rem/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.field label i { color: var(--heat); font-style: normal; }
input, select, textarea {
  width: 100%; font: 400 1rem/1.4 var(--body); color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 3px; padding: 12px 12px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--heat); outline-offset: 0; border-color: var(--heat); }
textarea { min-height: 120px; resize: vertical; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { padding: 14px 16px; border-left: 3px solid; font-weight: 500; }
.form-msg.ok { border-color: var(--ok); color: var(--ok); background: color-mix(in srgb, var(--ok) 10%, transparent); }
.form-msg.bad { border-color: var(--bad); color: var(--bad); background: color-mix(in srgb, var(--bad) 10%, transparent); }
.note { font-size: .88rem; color: var(--muted); }
.info { display: grid; gap: 22px; }
.info-item { display: grid; gap: 4px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.info-item a, .info-item b { font-size: 1.1rem; font-weight: 500; overflow-wrap: anywhere; }

/* Footer */
.site-foot { background: var(--panel); border-top: 1px solid var(--line); padding-block: 40px 28px; font-size: .92rem; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.foot-grid > * { min-width: 0; }
.foot-grid ul { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 6px; }
.foot-grid a { color: var(--ink); text-decoration: none; overflow-wrap: anywhere; }
.foot-grid a:hover { color: var(--heat); }
.foot-grid p { color: var(--muted); margin-top: 10px; }
.foot-base { margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr; } }

/* WhatsApp floating button (shown only when a number is set) */
.wa-float {
  position: fixed; z-index: 25;
  right: calc(18px + env(safe-area-inset-right, 0px)); bottom: calc(18px + env(safe-area-inset-bottom, 0px));
  width: 56px; height: 56px; border-radius: 50%; background: #1fa855; color: #fff;
  display: grid; place-items: center; box-shadow: 0 6px 18px rgba(0,0,0,.25);
}
.wa-float:hover { color: #fff; filter: brightness(1.08); }
.wa-float svg { width: 28px; height: 28px; }

@media (max-width: 480px) {
  .title-block { grid-template-columns: repeat(2, 1fr); }
  .title-block div:nth-child(3) { border-left: 0; }
  .title-block div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .brand b { font-size: 1.05rem; }
  .brand small { display: none; }
}