/* ============================================================
   SIGMA ENGINEERING & CASTINGS — Design System
   Two divisions, one engineering language.
   Manufacturing = molten (iron pour) · Foundry Solutions = steel (machine)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;450;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* Neutrals */
  --ink:        #14181F;   /* primary text / near-black slate */
  --ink-soft:   #3A414D;   /* secondary text */
  --muted:      #6B7280;   /* captions, meta */
  --paper:      #FBFAF8;   /* page background */
  --surface:    #F3F1 EC;  /* raised panels */
  --surface:    #F3F1EC;
  --surface-2:  #ECE9E2;   /* deeper panel */
  --line:       #E4E0D8;   /* hairline rules */
  --line-strong:#D3CEC3;

  /* Division accents (equal weight, different meaning) */
  --molten:     #E4552B;   /* Manufacturing — iron pour */
  --molten-ink: #B23A16;
  --molten-wash:#FBEDE6;
  --steel:      #2C5D8F;   /* Foundry Solutions — machine */
  --steel-ink:  #1E4467;
  --steel-wash: #E9F0F7;

  /* Dark section (used for hero footer band) */
  --night:      #10141B;
  --night-2:    #171C25;

  --radius:     14px;
  --radius-sm:  9px;
  --radius-lg:  22px;
  --wrap:       1180px;

  --shadow-sm:  0 1px 2px rgba(20,24,31,.05), 0 1px 1px rgba(20,24,31,.04);
  --shadow:     0 4px 14px rgba(20,24,31,.07), 0 2px 4px rgba(20,24,31,.05);
  --shadow-lg:  0 18px 50px rgba(20,24,31,.12), 0 6px 16px rgba(20,24,31,.08);

  --ease: cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--molten);color:#fff}

/* ---------- Type scale ---------- */
h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;line-height:1.08;letter-spacing:-.02em;font-weight:600;color:var(--ink)}
h1{font-size:clamp(2.3rem,5.2vw,4rem);font-weight:700;letter-spacing:-.035em}
h2{font-size:clamp(1.75rem,3.6vw,2.7rem)}
h3{font-size:clamp(1.2rem,2vw,1.55rem)}
h4{font-size:1.05rem}
p{color:var(--ink-soft)}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 26px}

/* data / engineering label */
.mono{font-family:'IBM Plex Mono',monospace;font-weight:500;letter-spacing:.04em}
.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:.72rem;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
  display:inline-flex;align-items:center;gap:9px;
}
.eyebrow::before{content:"";width:22px;height:1.5px;background:currentColor;opacity:.55}
.eyebrow.m{color:var(--molten-ink)}
.eyebrow.s{color:var(--steel-ink)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:.96rem;
  padding:13px 22px;border-radius:var(--radius-sm);
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-molten{background:var(--molten);color:#fff;box-shadow:var(--shadow-sm)}
.btn-molten:hover{background:var(--molten-ink);box-shadow:var(--shadow)}
.btn-steel{background:var(--steel);color:#fff;box-shadow:var(--shadow-sm)}
.btn-steel:hover{background:var(--steel-ink);box-shadow:var(--shadow)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink);box-shadow:var(--shadow-sm)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000}
.btn .arw{transition:transform .2s var(--ease)}
.btn:hover .arw{transform:translateX(3px)}

/* ---------- Header / Nav ---------- */
header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,250,248,.82);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
nav{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;gap:11px;margin-right:auto}
.brand-mark{width:40px;height:40px;display:grid;place-items:center;border-radius:9px;overflow:hidden;flex:none}
.brand-mark img{width:100%;height:100%;object-fit:contain}
.brand-mark.fallback{background:linear-gradient(135deg,var(--molten),var(--steel));color:#fff;font-family:'Space Grotesk';font-weight:700;font-size:1.15rem}
.brand-name{font-family:'Space Grotesk';font-weight:600;font-size:1.02rem;line-height:1.1;letter-spacing:-.01em}
.brand-name span{display:block;font-family:'IBM Plex Mono';font-weight:500;font-size:.66rem;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-top:2px}
.nav-links{display:flex;gap:3px}
.nav-links a{
  font-size:.92rem;font-weight:500;color:var(--ink-soft);
  padding:8px 13px;border-radius:8px;transition:.16s;position:relative;
}
.nav-links a:hover{color:var(--ink);background:var(--surface)}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;background:var(--molten)}
.nav-cta{display:inline-flex}
.menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.menu-btn span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.mobile-panel{display:none;flex-direction:column;padding:10px 26px 22px;border-bottom:1px solid var(--line);background:var(--paper)}
.mobile-panel a{padding:13px 6px;font-family:'Space Grotesk';font-weight:500;font-size:1.05rem;border-bottom:1px solid var(--line)}
.mobile-panel a:last-of-type{border:none}
.mobile-panel .btn{margin-top:14px;justify-content:center}

/* ---------- Section rhythm ---------- */
section{position:relative}
.pad{padding:clamp(64px,9vw,120px) 0}
.pad-sm{padding:clamp(44px,6vw,80px) 0}
.center{text-align:center}
.lead{font-size:1.18rem;color:var(--ink-soft);max-width:60ch}
.center .lead{margin-inline:auto}
.sec-head{max-width:640px;margin-bottom:48px}
.sec-head.center{margin-inline:auto}
.sec-head h2{margin:14px 0 16px}

/* blueprint grid backdrop util */
.grid-bg{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:46px 46px;opacity:.4;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000,transparent);
  mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000,transparent);
}

/* ---------- HERO ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(56px,8vw,104px) 0 clamp(48px,6vw,84px)}
.hero .wrap{position:relative;z-index:2}
.hero h1{max-width:16ch}
.hero .lead{margin:22px 0 34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:38px;flex-wrap:wrap;margin-top:52px;padding-top:30px;border-top:1px solid var(--line)}
.hstat .n{font-family:'Space Grotesk';font-weight:700;font-size:1.9rem;letter-spacing:-.03em;line-height:1}
.hstat .l{font-family:'IBM Plex Mono';font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);margin-top:7px}

/* ---------- Dual door (home) ---------- */
.doors{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.door{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);background:#fff;padding:38px 34px 32px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s;
  display:flex;flex-direction:column;min-height:390px;
}
.door::before{content:"";position:absolute;inset:0 0 auto 0;height:4px}
.door.m::before{background:var(--molten)}
.door.s::before{background:var(--steel)}
.door:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.door.m:hover{border-color:var(--molten)}
.door.s:hover{border-color:var(--steel)}
.door .badge{
  font-family:'IBM Plex Mono';font-size:.7rem;font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;padding:6px 11px;border-radius:100px;align-self:flex-start;
}
.door.m .badge{background:var(--molten-wash);color:var(--molten-ink)}
.door.s .badge{background:var(--steel-wash);color:var(--steel-ink)}
.door h3{font-size:1.7rem;margin:18px 0 12px}
.door p{font-size:1.02rem;margin-bottom:20px}
.door ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.door li{font-family:'IBM Plex Mono';font-size:.76rem;color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);padding:6px 10px;border-radius:7px}
.door .go{margin-top:auto;display:inline-flex;align-items:center;gap:9px;font-family:'Space Grotesk';font-weight:600}
.door.m .go{color:var(--molten-ink)}
.door.s .go{color:var(--steel-ink)}
.door .go .arw{transition:transform .2s var(--ease)}
.door:hover .go .arw{transform:translateX(4px)}

/* loop strip (how the two divisions reinforce) */
.loop{background:var(--night);color:#fff;border-radius:var(--radius-lg);padding:clamp(34px,5vw,56px);position:relative;overflow:hidden}
.loop h2{color:#fff}
.loop p{color:rgba(255,255,255,.72)}
.loop .grid-bg{opacity:.09;-webkit-mask-image:none;mask-image:none;background-image:linear-gradient(rgba(255,255,255,.4) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.4) 1px,transparent 1px)}
.loop-flow{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;margin-top:34px;position:relative;z-index:2}
.loop-node{background:var(--night-2);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:22px}
.loop-node .t{font-family:'IBM Plex Mono';font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px}
.loop-node.m .t{color:var(--molten)}
.loop-node.s .t{color:#6EA8DD}
.loop-node h4{color:#fff;font-size:1.2rem;margin-bottom:8px}
.loop-node p{font-size:.92rem}
.loop-mid{display:grid;place-items:center;gap:8px}
.loop-mid svg{width:56px;height:56px}
.loop-mid span{font-family:'IBM Plex Mono';font-size:.66rem;color:rgba(255,255,255,.5);text-align:center;letter-spacing:.05em}

/* ---------- Card grids ---------- */
.cards{display:grid;gap:20px}
.cards.c2{grid-template-columns:repeat(2,1fr)}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card .ico{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;margin-bottom:16px}
.card.m .ico{background:var(--molten-wash);color:var(--molten-ink)}
.card.s .ico{background:var(--steel-wash);color:var(--steel-ink)}
.card.n .ico{background:var(--surface-2);color:var(--ink)}
.card h4{font-size:1.14rem;margin-bottom:8px}
.card p{font-size:.95rem}
.card .num{font-family:'IBM Plex Mono';font-size:.74rem;color:var(--muted);margin-bottom:12px;display:block}

/* ---------- Process flow (vertical) ---------- */
.flow{max-width:820px;margin:0 auto;position:relative}
.flow::before{content:"";position:absolute;left:27px;top:24px;bottom:24px;width:2px;background:var(--line-strong)}
.step{display:grid;grid-template-columns:56px 1fr;gap:22px;padding:16px 0;position:relative}
.step .dot{
  width:56px;height:56px;border-radius:14px;display:grid;place-items:center;
  background:#fff;border:1.5px solid var(--line-strong);position:relative;z-index:2;
  font-family:'IBM Plex Mono';font-weight:600;color:var(--ink)
}
.step.check .dot{background:var(--molten);border-color:var(--molten);color:#fff}
.step .body h4{margin-bottom:5px}
.step .body p{font-size:.95rem}
.step .why{font-family:'IBM Plex Mono';font-size:.76rem;color:var(--molten-ink);margin-top:7px;display:inline-block}

/* ---------- Spec table ---------- */
.spectable{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.spectable th,.spectable td{text-align:left;padding:15px 18px;border-bottom:1px solid var(--line);font-size:.94rem}
.spectable th{font-family:'IBM Plex Mono';font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--surface)}
.spectable tr:last-child td{border-bottom:none}
.spectable td:first-child{font-weight:600;font-family:'Space Grotesk'}
.spectable .mono{color:var(--ink-soft)}

/* ---------- CTA band ---------- */
.ctaband{background:var(--night);color:#fff;border-radius:var(--radius-lg);padding:clamp(44px,6vw,72px);text-align:center;position:relative;overflow:hidden}
.ctaband h2{color:#fff;max-width:20ch;margin:0 auto 16px}
.ctaband p{color:rgba(255,255,255,.7);max-width:52ch;margin:0 auto 28px}
.ctaband .row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative;z-index:2}

/* ---------- Footer ---------- */
footer{background:var(--night);color:rgba(255,255,255,.7);padding:64px 0 30px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand img{width:36px;height:36px;object-fit:contain}
.foot-brand .fb{font-family:'Space Grotesk';font-weight:600;font-size:1.05rem;color:#fff}
footer p{font-size:.9rem;max-width:34ch}
.foot-col h5{font-family:'IBM Plex Mono';font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.45);margin-bottom:16px}
.foot-col a{display:block;font-size:.92rem;padding:5px 0;color:rgba(255,255,255,.72);transition:.15s}
.foot-col a:hover{color:#fff}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:44px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-family:'IBM Plex Mono';font-size:.76rem;color:rgba(255,255,255,.5)}

/* ---------- Forms ---------- */
.formcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(26px,4vw,40px);box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field label{display:block;font-family:'Space Grotesk';font-weight:500;font-size:.9rem;margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);
  font-family:inherit;font-size:.96rem;background:var(--paper);transition:.15s;color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--molten);box-shadow:0 0 0 3px var(--molten-wash)}
.field textarea{resize:vertical;min-height:120px}
.field.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field .hint{font-size:.8rem;color:var(--muted);margin-top:5px}
.hp{position:absolute;left:-9999px}
.formnote{font-size:.84rem;color:var(--muted);margin-top:14px;text-align:center}
.formstatus{padding:13px 16px;border-radius:var(--radius-sm);font-size:.92rem;margin-top:14px;display:none}
.formstatus.ok{display:block;background:#E7F6EC;color:#1B7A3D;border:1px solid #B6E2C4}
.formstatus.err{display:block;background:#FBE9E7;color:#B23A16;border:1px solid #F1C4BB}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .nav-links,.nav-cta{display:none}
  .menu-btn{display:flex}
  .doors{grid-template-columns:1fr}
  .cards.c3,.cards.c2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .loop-flow{grid-template-columns:1fr}
  .loop-mid svg{transform:rotate(90deg)}
  .field.row2{grid-template-columns:1fr}
}
@media(max-width:560px){
  body{font-size:16px}
  .foot-grid{grid-template-columns:1fr}
  .hero-stats{gap:26px}
  .flow::before{left:22px}
  .step{grid-template-columns:46px 1fr;gap:16px}
  .step .dot{width:46px;height:46px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.05ms!important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}