/* ==========================================================================
   Zuol Instruments — Design tokens
   ========================================================================== */
:root{
  --graphite: #1B2225;
  --graphite-2: #232C30;
  --steel: #33505E;
  --steel-light: #6C97A8;
  --silver: #C7CED2;
  --silver-dim: #8D989D;
  --paper: #F1F0EA;
  --paper-dim: #E4E2D9;
  --spark: #C2410C;
  --spark-light: #E07A3F;
  --line: rgba(27,34,37,0.14);
  --line-on-dark: rgba(199,206,210,0.18);

  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --container: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--graphite);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.02em;
  margin:0 0 0.5em;
  color:var(--graphite);
}
p{margin:0 0 1em;}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--spark);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--spark);
}
.section{ padding:96px 0; }
.section--tight{ padding:64px 0; }
.section--dark{
  background:var(--graphite);
  color:var(--silver);
}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:var(--paper);}
.section--steel{ background:var(--steel); color:var(--paper); }
.section--steel h2{color:#fff;}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  padding:14px 26px;
  border:1px solid var(--graphite);
  color:var(--graphite);
  transition:all .2s ease;
  white-space:nowrap;
}
.btn:hover{background:var(--graphite);color:var(--paper);}
.btn--primary{
  background:var(--spark);
  border-color:var(--spark);
  color:#fff;
}
.btn--primary:hover{background:var(--spark-light);border-color:var(--spark-light);color:#fff;}
.btn--light{ border-color:var(--paper); color:var(--paper); }
.btn--light:hover{ background:var(--paper); color:var(--graphite); }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:20px 0;
}
.logo{
  font-family:var(--font-display);
  font-size:22px;
  letter-spacing:0.04em;
  text-transform:uppercase;
  display:flex;
  flex-direction:column;
  line-height:1.05;
}
.logo span{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:0.22em;
  color:var(--spark);
  text-transform:uppercase;
  margin-top:4px;
}
.nav-links{
  display:flex;
  gap:36px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.06em;
  text-transform:uppercase;
}
.nav-links a{
  position:relative;
  padding-bottom:4px;
  border-bottom:1px solid transparent;
}
.nav-links a:hover, .nav-links a.active{ border-bottom-color:var(--spark); color:var(--spark);}
.nav-cta{ display:flex; align-items:center; gap:20px; }
.nav-toggle{ display:none; }

@media (max-width:840px){
  .nav-links{
    position:fixed; inset:72px 0 0 0; background:var(--paper);
    flex-direction:column; padding:32px 28px; gap:22px; font-size:16px;
    transform:translateY(-110%); transition:transform .25s ease; border-top:1px solid var(--line);
  }
  .nav-links.open{ transform:translateY(0); }
  .nav-toggle{
    display:block; background:none; border:1px solid var(--graphite); width:40px; height:40px;
    font-family:var(--font-mono); cursor:pointer;
  }
  .nav-cta .btn{display:none;}
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  position:relative;
  background:var(--graphite);
  color:var(--paper);
  overflow:hidden;
  padding:110px 0 90px;
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background-image:
    repeating-linear-gradient(115deg, rgba(199,206,210,0.05) 0px, rgba(199,206,210,0.05) 1px, transparent 1px, transparent 64px);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:48px;
  align-items:center;
  position:relative;
}
.hero h1{
  font-size:clamp(38px,5vw,60px);
  line-height:1.03;
  color:#fff;
  margin-bottom:22px;
}
.hero h1 em{ font-style:normal; color:var(--spark-light); }
.hero p.lead{
  font-size:18px;
  color:var(--silver);
  max-width:46ch;
  margin-bottom:32px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }
.hero-stats{
  display:flex;
  gap:36px;
  margin-top:56px;
  padding-top:28px;
  border-top:1px solid var(--line-on-dark);
  flex-wrap:wrap;
}
.stat .num{
  font-family:var(--font-display);
  font-size:32px;
  color:#fff;
}
.stat .lbl{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--silver-dim);
}
.hero-diagram{ position:relative; }
.hero-diagram svg{ width:100%; height:auto; }

/* ==========================================================================
   Blueprint / diagram styling
   ========================================================================== */
.blueprint-line{ stroke:var(--steel-light); stroke-width:1; fill:none; }
.blueprint-dim{ stroke:var(--silver-dim); stroke-width:1; }
.blueprint-text{ font-family:var(--font-mono); font-size:10px; fill:var(--silver-dim); letter-spacing:0.04em;}
.blueprint-accent{ stroke:var(--spark-light); }

/* ==========================================================================
   Section headers / generic layout
   ========================================================================== */
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:24px;
  margin-bottom:52px;
  flex-wrap:wrap;
}
.section-head h2{ font-size:clamp(28px,3.4vw,40px); margin:0; }
.section-head p{ max-width:44ch; color:var(--silver-dim); margin:0; }
.section--dark .section-head p{color:var(--silver-dim);}
.section:not(.section--dark):not(.section--steel) .section-head p{ color:#5b5f57; }

/* Grid utilities */
.grid{ display:grid; gap:28px; }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }
.grid-2{ grid-template-columns:repeat(2,1fr); }
@media (max-width:900px){
  .grid-3,.grid-4{ grid-template-columns:repeat(2,1fr); }
  .hero-grid{ grid-template-columns:1fr; }
  .hero-diagram{ order:-1; }
}
@media (max-width:600px){
  .grid-2,.grid-3,.grid-4{ grid-template-columns:1fr; }
}

/* Cards */
.card{
  border:1px solid var(--line);
  padding:30px 26px;
  background:var(--paper);
  position:relative;
}
.card .num{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--spark);
  display:block;
  margin-bottom:14px;
}
.card h3{ font-size:19px; margin-bottom:10px; }
.card p{ color:#565a52; font-size:14.5px; margin-bottom:0; }
.section--dark .card{ background:var(--graphite-2); border-color:var(--line-on-dark); }
.section--dark .card p{ color:var(--silver-dim); }

/* Product cards */
.product-card{
  border:1px solid var(--line);
  background:#fff;
  display:flex;
  flex-direction:column;
}
.product-card .thumb{
  aspect-ratio:4/3;
  background:var(--graphite);
  display:flex;
  align-items:center;
  justify-content:center;
  border-bottom:1px solid var(--line);
}
.product-card .thumb svg{ width:70%; }
.product-card .body{ padding:22px 22px 24px; flex:1; display:flex; flex-direction:column; }
.product-card h3{ font-size:17px; margin-bottom:8px; }
.product-card p{ color:#565a52; font-size:14px; flex:1; }
.product-card .tags{ display:flex; gap:8px; flex-wrap:wrap; margin-top:14px; }
.tag{
  font-family:var(--font-mono); font-size:10.5px; text-transform:uppercase;
  letter-spacing:0.05em; padding:5px 9px; border:1px solid var(--line); color:#565a52;
}

/* Table (specs / capabilities) */
.spec-table{ width:100%; border-collapse:collapse; font-size:14.5px; }
.spec-table th,.spec-table td{
  text-align:left; padding:14px 16px; border-bottom:1px solid var(--line);
}
.spec-table th{
  font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase;
  letter-spacing:0.06em; color:var(--spark); font-weight:500;
}
.section--dark .spec-table th,.section--dark .spec-table td{ border-color:var(--line-on-dark); }

/* Process / numbered strip */
.process{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; border-top:1px solid var(--line); border-left:1px solid var(--line);}
.process .step{ padding:28px 24px; border-right:1px solid var(--line); border-bottom:1px solid var(--line); }
.process .step .idx{ font-family:var(--font-mono); color:var(--spark); font-size:13px; }
.process .step h4{ font-size:15px; margin:10px 0 8px; }
.process .step p{ font-size:13.5px; color:#5b5f57; margin:0; }
@media (max-width:840px){ .process{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .process{ grid-template-columns:1fr; } }

/* CTA band */
.cta-band{
  background:var(--steel);
  color:#fff;
  padding:64px 0;
}
.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; font-size:clamp(24px,3vw,32px); }
.cta-band p{ color:var(--silver); margin:0; }

/* Footer */
.site-footer{ background:var(--graphite); color:var(--silver-dim); padding:64px 0 28px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; margin-bottom:48px; }
.footer-grid h4{ color:var(--silver); font-size:13px; letter-spacing:0.08em; margin-bottom:16px;}
.footer-grid p, .footer-grid a{ font-size:14px; color:var(--silver-dim); display:block; margin-bottom:10px; }
.footer-grid a:hover{ color:var(--spark-light); }
.footer-logo{ font-family:var(--font-display); color:#fff; font-size:20px; text-transform:uppercase; margin-bottom:14px; }
.footer-bottom{
  border-top:1px solid var(--line-on-dark); padding-top:22px;
  display:flex; justify-content:space-between; font-family:var(--font-mono); font-size:11.5px;
  letter-spacing:0.04em; flex-wrap:wrap; gap:10px;
}
@media (max-width:840px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .footer-grid{ grid-template-columns:1fr; } }

/* Page hero (interior pages) */
.page-hero{
  background:var(--graphite); color:#fff; padding:72px 0 56px; position:relative; overflow:hidden;
}
.page-hero::before{
  content:""; position:absolute; inset:0;
  background-image:repeating-linear-gradient(115deg, rgba(199,206,210,0.05) 0px, rgba(199,206,210,0.05) 1px, transparent 1px, transparent 64px);
}
.page-hero .container{ position:relative; }
.page-hero h1{ color:#fff; font-size:clamp(32px,4.4vw,48px); margin-bottom:14px; }
.page-hero p{ color:var(--silver); max-width:56ch; margin:0; }
.breadcrumb{ font-family:var(--font-mono); font-size:12px; color:var(--silver-dim); margin-bottom:18px; letter-spacing:0.05em;}
.breadcrumb a:hover{ color:var(--spark-light); }

/* Contact page */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:60px; }
.contact-info .item{ margin-bottom:28px; }
.contact-info .lbl{ font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:0.06em; color:var(--spark); margin-bottom:6px; }
.contact-info .val{ font-size:17px; }
form.contact-form{ display:flex; flex-direction:column; gap:20px; }
.field{ display:flex; flex-direction:column; gap:8px; }
.field label{ font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:0.05em; color:var(--silver-dim); }
.field input, .field textarea, .field select{
  border:1px solid var(--line); background:transparent; padding:13px 14px; font-family:var(--font-body);
  font-size:15px; color:var(--graphite); resize:vertical;
}
.field input:focus, .field textarea:focus, .field select:focus{ outline:2px solid var(--spark); outline-offset:1px; }
@media (max-width:840px){ .contact-grid{ grid-template-columns:1fr; } }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ transition:none !important; animation:none !important; }
}