/* =========================================================
   SIGMATECH — Design System "Stainless"
   Precision, food-grade, industrial-clean.
   ========================================================= */

:root{
  --bg:#FAFAF9;
  --surface:#FFFFFF;
  --surface-2:#F3F4F4;
  --line:#DADDE0;
  --line-strong:#B9BFC4;
  --ink:#1D2124;
  --muted:#6B747B;
  --red:#D8232A;
  --red-dark:#B31D22;
  --steel:#5B6670;
  --green:#2E8B57;
  --amber:#B9770E;

  --font-display:"Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body:"Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono:ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;

  --container:1240px;
  --radius:2px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
}
a{color:inherit; text-decoration:none;}
img,svg{display:block; max-width:100%;}
ul,ol{margin:0; padding:0;}
::selection{background:var(--red); color:#fff;}
:focus-visible{outline:2px solid var(--red); outline-offset:2px;}

.container{max-width:var(--container); margin:0 auto; padding:0 32px;}
@media (max-width:640px){ .container{padding:0 20px;} }

h1,h2,h3,h4{font-weight:700; margin:0; text-wrap:balance; letter-spacing:-.015em;}
p{margin:0;}
.eyebrow{
  font-size:11.5px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--red); font-weight:700; margin-bottom:16px; display:block;
}
.lede{color:var(--muted); font-size:17px; max-width:60ch; font-weight:400;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px; padding:12px 22px;
  font-weight:600; font-size:13.5px; border-radius:var(--radius);
  border:1px solid var(--line-strong); cursor:pointer; background:transparent;
  color:var(--ink); white-space:nowrap;
}
.btn-primary{background:var(--red); border-color:var(--red); color:#fff;}
.btn-primary:hover{background:var(--red-dark); border-color:var(--red-dark);}
.btn-ghost:hover{border-color:var(--ink);}
.btn-dark{background:var(--ink); border-color:var(--ink); color:#fff;}
.btn-dark:hover{background:#000;}
.btn-block{width:100%; justify-content:center;}
.btn-sm{padding:9px 16px; font-size:12.5px;}

/* ---------- Header / Nav ---------- */
header.site{
  position:sticky; top:0; z-index:30;
  background:rgba(250,250,249,.92); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.topbar{
  background:var(--ink); color:#C7CBCE; font-size:12px;
}
.topbar .container{display:flex; justify-content:space-between; align-items:center; padding:8px 32px; flex-wrap:wrap; gap:6px;}
.topbar a:hover{color:#fff;}

nav.navbar{display:flex; align-items:center; justify-content:space-between; padding:20px 32px; gap:20px;}
.logo{display:flex; align-items:center; gap:11px; font-weight:700; font-size:19px; letter-spacing:-.01em;}
.logo .mark{width:28px; height:28px; background:var(--red); display:flex; align-items:center; justify-content:center; font-weight:700; font-size:15px; color:#fff; flex:none;}
.logo b{color:var(--red); font-weight:700;}

.navlinks{display:flex; gap:30px; font-size:13.5px; color:var(--muted); font-weight:500;}
.navlinks a:hover, .navlinks a.active{color:var(--ink);}
.navlinks a.active{position:relative;}
.navlinks a.active::after{content:""; position:absolute; left:0; right:0; bottom:-22px; height:2px; background:var(--red);}

.navcta{display:flex; gap:10px; align-items:center;}
.navtoggle{display:none; background:none; border:1px solid var(--line-strong); border-radius:var(--radius); width:40px; height:40px; align-items:center; justify-content:center; cursor:pointer; flex:none;}
.navtoggle span, .navtoggle span::before, .navtoggle span::after{
  content:""; display:block; width:18px; height:2px; background:var(--ink); position:relative; transition:.15s;
}
.navtoggle span::before{position:absolute; top:-6px;}
.navtoggle span::after{position:absolute; top:6px;}
.navlinks-cta{display:none;}

@media (max-width:900px){
  nav.navbar{padding:16px 20px; gap:12px;}
  .navlinks{
    position:fixed; top:0; right:0; height:100vh; width:min(78vw,320px);
    background:var(--surface); flex-direction:column; justify-content:flex-start;
    padding:96px 32px 32px; gap:24px; transform:translateX(100%);
    transition:transform .2s ease; box-shadow:-8px 0 24px rgba(0,0,0,.08);
    font-size:16px; overflow-y:auto;
  }
  .navlinks a.active::after{display:none;}
  body.nav-open .navlinks{transform:translateX(0);}
  .navtoggle{display:flex;}
  .navcta .btn-ghost, .navcta .btn-primary{display:none;}
  .navlinks-cta{display:flex; flex-direction:column; gap:12px; margin-top:8px; padding-top:24px; border-top:1px solid var(--line);}
  .navlinks-cta .btn{justify-content:center;}
  body.nav-open{overflow:hidden;}
  .navoverlay{display:none; position:fixed; inset:0; background:rgba(20,22,24,.35); z-index:25;}
  body.nav-open .navoverlay{display:block;}
}

.breadcrumb{padding:18px 0; font-size:12.5px; color:var(--muted); border-bottom:1px solid var(--line); background:var(--surface);}
.breadcrumb a:hover{color:var(--ink);}
.breadcrumb .sep{margin:0 8px; color:var(--line-strong);}

/* ---------- Sections ---------- */
section{padding:100px 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--surface-2);}
@media (max-width:640px){ section{padding:64px 0;} }

.page-hero{padding:64px 0 56px; border-bottom:1px solid var(--line);}
.page-hero h1{font-size:clamp(30px,4.4vw,48px); line-height:1.06;}
.page-hero .lede{margin-top:18px;}

.section-head{display:flex; justify-content:space-between; align-items:flex-end; margin-bottom:48px; gap:20px; flex-wrap:wrap;}
.section-head h2{font-size:clamp(26px,3.2vw,38px);}

/* ---------- Stat line ---------- */
.statsline{border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.statsline .grid4{display:grid; grid-template-columns:repeat(4,1fr);}
.stat{padding:34px 0; border-left:1px solid var(--line); padding-left:28px;}
.stat:first-child{border-left:none; padding-left:0;}
.stat .num{font-family:var(--font-mono); font-size:32px; font-weight:700; font-variant-numeric:tabular-nums; letter-spacing:-.02em;}
.stat .num span{color:var(--red);}
.stat .lbl{font-size:12.5px; color:var(--muted); margin-top:6px; text-transform:uppercase; letter-spacing:.05em; font-weight:500;}
@media (max-width:900px){
  .statsline .grid4{grid-template-columns:1fr 1fr;}
  .stat{border-left:none; border-top:1px solid var(--line); padding-left:0; padding-top:24px;}
}

/* ---------- Value strip ---------- */
.strip{border-bottom:1px solid var(--line);}
.strip .grid4{display:grid; grid-template-columns:repeat(4,1fr);}
.strip-item{padding:40px 28px 40px 0; border-left:1px solid var(--line); padding-left:28px;}
.strip-item:first-child{border-left:none; padding-left:0;}
.strip-item .n{font-family:var(--font-mono); font-size:11px; color:var(--steel); margin-bottom:14px; display:block;}
.strip-item h4{font-size:15px; margin:0 0 8px; font-weight:700;}
.strip-item p{margin:0; font-size:13.5px; color:var(--muted); line-height:1.55;}
@media (max-width:900px){
  .strip .grid4{grid-template-columns:1fr 1fr;}
  .strip-item{border-left:none; border-top:1px solid var(--line); padding:28px 0;}
}

/* ---------- Grids ---------- */
.grid3{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line);}
@media (max-width:900px){ .grid3{grid-template-columns:1fr;} }
.grid2{display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line);}
@media (max-width:800px){ .grid2{grid-template-columns:1fr;} }

/* ---------- Cards (product / category) ---------- */
.card{background:var(--surface); padding:34px; transition:box-shadow .15s;}
.card:hover{box-shadow:inset 0 -2px 0 var(--red);}
.card .thumb{
  aspect-ratio:16/10; margin-bottom:24px; border:1px solid var(--line);
  background:linear-gradient(135deg,#EFEFEE,#E2E4E5);
  display:flex; align-items:center; justify-content:center; color:var(--steel);
  font-size:11px; letter-spacing:.08em; text-transform:uppercase; font-family:var(--font-mono);
  text-align:center; padding:12px;
}
.card h3{font-size:20px; margin-bottom:10px;}
.card p.desc{color:var(--muted); font-size:14px; margin:0 0 20px;}
.card .spec{display:flex; justify-content:space-between; font-size:12px; padding:9px 0; border-top:1px solid var(--line); color:var(--muted); font-family:var(--font-mono);}
.card .spec span:last-child{color:var(--ink); font-weight:600;}
.card .card-cta{margin-top:18px; display:flex; gap:10px; flex-wrap:wrap;}

/* ---------- Filter bar (product catalog) ---------- */
.filterbar{display:flex; gap:10px; flex-wrap:wrap; margin-bottom:40px; padding-bottom:28px; border-bottom:1px solid var(--line);}
.chip{
  padding:9px 16px; border:1px solid var(--line-strong); border-radius:20px;
  font-size:13px; font-weight:600; color:var(--muted); cursor:pointer; background:var(--surface);
}
.chip.is-active, .chip:hover{border-color:var(--ink); color:var(--ink);}
.chip.is-active{background:var(--ink); color:#fff; border-color:var(--ink);}

/* ---------- Product detail ---------- */
.product-hero{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start;}
@media (max-width:900px){ .product-hero{grid-template-columns:1fr;} }
.product-gallery .thumb-main{aspect-ratio:4/3;}
.spectable{width:100%; border-collapse:collapse; font-size:14px;}
.spectable tr{border-top:1px solid var(--line);}
.spectable tr:first-child{border-top:none;}
.spectable td{padding:13px 0; vertical-align:top;}
.spectable td:first-child{color:var(--muted); width:42%; font-family:var(--font-mono); font-size:12.5px; text-transform:uppercase; letter-spacing:.03em;}
.spectable td:last-child{font-weight:600;}
.feature-list{list-style:none; margin:20px 0 0; display:flex; flex-direction:column; gap:10px;}
.feature-list li{display:flex; gap:10px; font-size:14.5px; align-items:flex-start;}
.feature-list li::before{content:"—"; color:var(--red); flex:none;}
.wide-scroll{overflow-x:auto;}

/* ---------- Process ---------- */
.process{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); margin-top:20px;}
.pstep{background:var(--surface); padding:30px 26px;}
.pstep .idx{font-family:var(--font-mono); font-size:12px; color:var(--red); font-weight:700;}
.pstep h4{font-size:15.5px; margin:14px 0 8px; font-weight:700;}
.pstep p{margin:0; font-size:13px; color:var(--muted);}
@media (max-width:900px){ .process{grid-template-columns:1fr 1fr;} }

/* ---------- CTA banner ---------- */
.cta{background:var(--ink); color:#fff; padding:60px; display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap;}
.cta h3{font-size:clamp(22px,3.2vw,32px); max-width:22ch; color:#fff;}
.cta p{color:#B7BEC4; margin:12px 0 0; font-size:14.5px;}
.cta .btn-primary{background:var(--red); border-color:var(--red);}
.cta .btn-ghost{border-color:#565C61; color:#fff;}
.cta .btn-ghost:hover{border-color:#fff;}

/* ---------- Testimonial ---------- */
.testi{background:var(--surface); border:1px solid var(--line); padding:30px; display:flex; flex-direction:column; gap:18px;}
.testi p.quote{font-size:16px; line-height:1.6;}
.testi .who{display:flex; align-items:center; gap:12px;}
.testi .avatar{width:38px; height:38px; border-radius:50%; background:var(--surface-2); border:1px solid var(--line); display:flex; align-items:center; justify-content:center; font-weight:700; color:var(--red); font-size:14px;}
.testi .name{font-weight:700; font-size:13.5px;}
.testi .role{color:var(--muted); font-size:12.5px;}

/* ---------- Badges / certification ---------- */
.badge-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line);}
.badge{background:var(--surface); padding:30px 24px; text-align:center; display:flex; flex-direction:column; align-items:center; gap:12px;}
.badge .glyph{width:52px; height:52px; border:2px solid var(--line-strong); border-radius:50%; display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-weight:700; color:var(--red); font-size:13px;}
.badge h4{font-size:13.5px;}
.badge p{font-size:12px; color:var(--muted);}
@media (max-width:900px){ .badge-grid{grid-template-columns:1fr 1fr;} }

/* ---------- Blog ---------- */
.blog-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:28px;}
@media (max-width:900px){ .blog-grid{grid-template-columns:1fr;} }
.blogcard .thumb{aspect-ratio:16/10; margin-bottom:18px;}
.blogcard .meta{font-family:var(--font-mono); font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:.05em; margin-bottom:10px;}
.blogcard h3{font-size:18px; margin-bottom:8px;}
.blogcard p{color:var(--muted); font-size:13.5px;}
article.post{max-width:72ch; margin:0 auto;}
article.post h2{font-size:24px; margin:44px 0 14px;}
article.post p{font-size:16px; color:#33383C; margin:0 0 18px;}
article.post ul{margin:0 0 18px 22px;}
article.post li{margin-bottom:8px; font-size:16px;}

/* ---------- Forms ---------- */
.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:20px;}
@media (max-width:700px){ .form-grid{grid-template-columns:1fr;} }
.field{display:flex; flex-direction:column; gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:12.5px; font-weight:700; text-transform:uppercase; letter-spacing:.04em; color:var(--ink);}
.field .hint{font-size:12px; color:var(--muted); font-weight:400; text-transform:none; letter-spacing:0;}
.field input, .field select, .field textarea{
  border:1px solid var(--line-strong); border-radius:var(--radius); padding:12px 14px;
  font-size:14.5px; font-family:var(--font-body); background:var(--surface); color:var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus{border-color:var(--ink);}
.field textarea{resize:vertical; min-height:120px;}
.field-file{border:1.5px dashed var(--line-strong); border-radius:var(--radius); padding:20px; text-align:center; font-size:13px; color:var(--muted);}
.field-file input{margin-top:10px;}
.form-note{font-size:12.5px; color:var(--muted); margin-top:6px;}

/* ---------- Accordion (FAQ) ---------- */
.accordion{border-top:1px solid var(--line);}
.accordion details{border-bottom:1px solid var(--line); padding:22px 0;}
.accordion summary{
  cursor:pointer; list-style:none; font-weight:700; font-size:16px;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
}
.accordion summary::-webkit-details-marker{display:none;}
.accordion summary::after{content:"+"; font-size:22px; color:var(--red); flex:none; font-weight:400;}
.accordion details[open] summary::after{content:"–";}
.accordion .a-body{color:var(--muted); font-size:14.5px; margin-top:14px; max-width:70ch;}

/* ---------- Contact layout ---------- */
.contact-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:56px; align-items:start;}
@media (max-width:900px){ .contact-grid{grid-template-columns:1fr;} }
.contact-card{background:var(--surface); border:1px solid var(--line); padding:28px;}
.contact-card + .contact-card{margin-top:20px;}
.contact-card h4{font-size:14px; margin-bottom:6px;}
.contact-card p{color:var(--muted); font-size:14px;}
.map-frame{aspect-ratio:4/3; border:1px solid var(--line); background:var(--surface-2); display:flex; align-items:center; justify-content:center; color:var(--steel); font-size:12.5px; font-family:var(--font-mono); text-align:center; padding:16px;}

/* ---------- Industries ---------- */
.tier-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
@media (max-width:900px){ .tier-grid{grid-template-columns:1fr;} }
.tier{border:1px solid var(--line); padding:28px; background:var(--surface);}
.tier .tag{font-family:var(--font-mono); font-size:10.5px; color:var(--red); text-transform:uppercase; letter-spacing:.08em;}
.tier h3{font-size:19px; margin:12px 0 10px;}
.tier p{color:var(--muted); font-size:13.5px; margin-bottom:16px;}
.tier ul{list-style:none; display:flex; flex-direction:column; gap:8px;}
.tier li{font-size:13px; padding-left:16px; position:relative; color:var(--ink);}
.tier li::before{content:""; width:5px; height:5px; background:var(--red); position:absolute; left:0; top:7px;}

.sector-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line);}
@media (max-width:900px){ .sector-grid{grid-template-columns:1fr 1fr;} }
.sector{background:var(--surface); padding:26px; text-align:center;}
.sector h4{font-size:13.5px; margin-bottom:4px;}
.sector p{font-size:11.5px; color:var(--muted);}

/* ---------- Case studies (portfolio) ---------- */
.case{border:1px solid var(--line); background:var(--surface); display:grid; grid-template-columns:.9fr 1.1fr;}
.case + .case{margin-top:24px;}
.case .thumb{border-right:1px solid var(--line);}
.case-body{padding:32px;}
.case .tag{font-family:var(--font-mono); font-size:10.5px; color:var(--red); text-transform:uppercase; letter-spacing:.08em;}
.case h3{font-size:20px; margin:10px 0 14px;}
.case dl{display:grid; grid-template-columns:auto 1fr; gap:6px 14px; font-size:13.5px; margin-top:16px;}
.case dt{color:var(--muted); font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:.03em;}
.case dd{margin:0;}
@media (max-width:800px){ .case{grid-template-columns:1fr;} .case .thumb{border-right:none; border-bottom:1px solid var(--line); aspect-ratio:16/9;} }

/* ---------- Footer ---------- */
footer.site{border-top:1px solid var(--line); padding:64px 0 30px;}
.foot-grid{display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:40px; margin-bottom:50px;}
.foot-grid h5{font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:var(--muted); margin:0 0 16px; font-weight:700;}
.foot-grid ul{list-style:none; margin:0; padding:0; font-size:14px; color:var(--steel); display:flex; flex-direction:column; gap:10px;}
.foot-grid p{color:var(--muted); font-size:14px; max-width:36ch; margin:14px 0 0;}
.foot-bottom{display:flex; justify-content:space-between; padding-top:26px; border-top:1px solid var(--line); font-size:12px; color:var(--muted); flex-wrap:wrap; gap:10px;}
@media (max-width:800px){ .foot-grid{grid-template-columns:1fr 1fr;} }

/* ---------- WhatsApp floating button ---------- */
.wa-float{
  position:fixed; right:22px; bottom:22px; z-index:40;
  background:#25D366; color:#fff; width:56px; height:56px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; box-shadow:0 6px 18px rgba(0,0,0,.22);
}
.wa-float:hover{background:#1ebe57;}
.wa-float svg{width:28px; height:28px;}

/* ---------- Utility ---------- */
.mt-0{margin-top:0;}
.text-muted{color:var(--muted);}
.center{text-align:center;}
.tag-pill{display:inline-block; padding:4px 10px; border:1px solid var(--line-strong); border-radius:20px; font-size:11.5px; font-weight:600; color:var(--muted);}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .navlinks{transition:none;}
}