/* ============================================================
   SYSTIQO TECH LABS — Design System
   Tokens: paper #F8F7F3 / ink #14130F / line #DEDAD1
   Signal: cobalt #1F3A5F · Spec: brass #9C7A2E
   Type: Syne (display) · Instrument Serif (eyebrow/italic)
         DM Sans (body) · DM Mono (data/labels/nav)
   ============================================================ */

:root{
  --paper:#F8F7F3;
  --paper-dim:#F1EFE9;
  --ink:#14130F;
  --ink-soft:#55534C;
  --line:#DEDAD1;
  --line-strong:#C7C2B6;
  --signal:#1F3A5F;
  --signal-soft:#E8EEF3;
  --spec:#9C7A2E;
  --radius:2px;
  --maxw:1280px;
  --rail-w:64px;
  --ease:cubic-bezier(.16,.84,.44,1);
}

@font-face{font-family:'Syne';src:local('Syne');}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'DM Sans', system-ui, sans-serif;
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{
  font-family:'Syne', sans-serif;
  font-weight:700;
  letter-spacing:-0.01em;
  margin:0;
  color:var(--ink);
}
.mono{
  font-family:'DM Mono', monospace;
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.eyebrow{
  font-family:'Instrument Serif', serif;
  font-style:italic;
  font-size:19px;
  color:var(--signal);
  letter-spacing:0;
}
.wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 40px;
}
@media (max-width:720px){ .wrap{padding:0 20px;} }

:focus-visible{ outline:2px solid var(--signal); outline-offset:3px; }

/* ---------- Index Rail (signature element) ----------
   A fixed left margin spine, like an engineering drawing's
   reference column — running section index + status. */
.rail{
  position:fixed;
  top:0; left:0; bottom:0;
  width:var(--rail-w);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:24px 0;
  z-index:40;
  background:var(--paper);
}
.rail-mark{
  font-family:'DM Mono', monospace;
  font-size:11px;
  color:var(--ink-soft);
  writing-mode:vertical-rl;
  letter-spacing:.12em;
}
.rail-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 4px var(--signal-soft);
}
.rail-id{
  font-family:'DM Mono', monospace;
  font-size:11px;
  color:var(--ink-soft);
  writing-mode:vertical-rl;
}
@media (max-width:880px){ .rail{display:none;} }

.has-rail{ margin-left:var(--rail-w); }
@media (max-width:880px){ .has-rail{ margin-left:0; } }

/* ---------- Header ---------- */
header.site{
  position:sticky; top:0; z-index:30;
  background:rgba(248,247,243,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 0;
}
.brand{
  display:flex; align-items:baseline; gap:10px;
  font-family:'Syne', sans-serif; font-weight:700; font-size:17px;
}
.brand .dot{color:var(--signal);}
.navlinks{ display:flex; gap:32px; align-items:center; }
.navlinks a{
  font-family:'DM Mono', monospace;
  font-size:12px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--ink-soft);
  position:relative;
  padding:4px 0;
  transition:color .2s var(--ease);
}
.navlinks a:hover, .navlinks a.active{ color:var(--ink); }
.navlinks a.active::after{
  content:''; position:absolute; left:0; right:0; bottom:-2px; height:2px; background:var(--signal);
}
.nav-cta{
  font-family:'DM Mono', monospace;
  font-size:12px; text-transform:uppercase; letter-spacing:.06em;
  border:1px solid var(--ink); padding:9px 18px;
  border-radius:var(--radius);
  transition:background .2s var(--ease), color .2s var(--ease);
}
.nav-cta:hover{ background:var(--ink); color:var(--paper); }
.navtoggle{ display:none; background:none; border:0; cursor:pointer; }
@media (max-width:880px){
  .navlinks{
    position:fixed; top:61px; left:0; right:0; bottom:0;
    background:var(--paper); flex-direction:column; align-items:flex-start;
    padding:32px 24px; gap:24px; transform:translateX(100%);
    transition:transform .3s var(--ease); overflow-y:auto;
  }
  .navlinks.open{ transform:translateX(0); }
  .navlinks a{ font-size:16px; }
  .navtoggle{ display:block; }
}

/* ---------- Hero ---------- */
.hero{
  padding:120px 0 90px;
  border-bottom:1px solid var(--line);
}
.hero .eyebrow{ display:block; margin-bottom:18px; }
.hero h1{
  font-size:clamp(38px, 5.6vw, 72px);
  line-height:1.04;
  max-width:920px;
}
.hero p.lede{
  margin:26px 0 0; max-width:560px;
  color:var(--ink-soft); font-size:18px;
}
.hero-meta{
  display:flex; gap:48px; margin-top:56px; flex-wrap:wrap;
}
.hero-meta div{ font-family:'DM Mono', monospace; font-size:12px; color:var(--ink-soft); }
.hero-meta b{ display:block; font-family:'Syne',sans-serif; font-size:22px; color:var(--ink); margin-top:6px; font-weight:700;}

/* ---------- Page header (non-home) ---------- */
.pagehead{ padding:90px 0 60px; border-bottom:1px solid var(--line); }
.pagehead h1{ font-size:clamp(34px,4.6vw,56px); max-width:760px; }
.pagehead p.lede{ margin-top:20px; max-width:560px; color:var(--ink-soft); font-size:17px; }

/* ---------- Sections ---------- */
section{ padding:90px 0; border-bottom:1px solid var(--line); }
section.tight{ padding:64px 0; }
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end;
  gap:24px; margin-bottom:48px; flex-wrap:wrap;
}
.section-head h2{ font-size:clamp(26px,3.2vw,38px); max-width:560px; }
.section-num{ font-family:'DM Mono',monospace; font-size:12px; color:var(--spec); }

/* ---------- Grids ---------- */
.grid{ display:grid; gap:1px; background:var(--line); border:1px solid var(--line); }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-2{ grid-template-columns:repeat(2,1fr); }
@media (max-width:880px){ .grid-3,.grid-2{ grid-template-columns:1fr; } }
.cell{ background:var(--paper); padding:36px; }
.cell h3{ font-size:20px; margin-bottom:14px; }
.cell p{ color:var(--ink-soft); font-size:15px; margin:0; }
.cell .tag{ font-family:'DM Mono',monospace; font-size:11px; color:var(--spec); display:block; margin-bottom:16px; }

/* ---------- Capability list (numbered, real sequence not needed -> use letter index by domain) ---------- */
.caplist{ display:flex; flex-direction:column; }
.caprow{
  display:grid; grid-template-columns:90px 1fr 1fr; gap:24px;
  padding:28px 0; border-top:1px solid var(--line);
  align-items:baseline;
}
.caprow:first-child{ border-top:1px solid var(--line); }
.caprow .id{ font-family:'DM Mono',monospace; font-size:12px; color:var(--spec); }
.caprow h3{ font-size:21px; }
.caprow p{ color:var(--ink-soft); font-size:15px; margin:0; }
@media (max-width:720px){ .caprow{ grid-template-columns:1fr; gap:8px; } }

/* ---------- CTA band (on every page) ---------- */
.cta-band{
  padding:80px 0; border-bottom:1px solid var(--line);
  background:var(--ink); color:var(--paper);
}
.cta-band .wrap{ display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap; }
.cta-band h2{ color:var(--paper); font-size:clamp(26px,3.6vw,40px); max-width:520px; }
.cta-band .eyebrow{ color:#9DB8D4; }
.cta-actions{ display:flex; gap:14px; flex-wrap:wrap; }
.btn{
  font-family:'DM Mono',monospace; font-size:12px; text-transform:uppercase; letter-spacing:.06em;
  padding:14px 24px; border-radius:var(--radius);
  display:inline-flex; align-items:center; gap:10px;
  border:1px solid var(--paper);
  transition:transform .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
}
.btn-solid{ background:var(--paper); color:var(--ink); }
.btn-solid:hover{ transform:translateY(-2px); }
.btn-ghost{ background:transparent; color:var(--paper); }
.btn-ghost:hover{ background:var(--paper); color:var(--ink); }
.cta-band .btn-ghost{ border-color:#5A5950; }
.cta-band .btn-ghost:hover{ border-color:var(--paper); }

/* On light sections, CTA buttons need dark variant */
.btn-dark{ border:1px solid var(--ink); color:var(--ink); }
.btn-dark:hover{ background:var(--ink); color:var(--paper); }
.btn-dark-solid{ background:var(--ink); color:var(--paper); border:1px solid var(--ink); }
.btn-dark-solid:hover{ background:var(--signal); border-color:var(--signal); transform:translateY(-2px); }

/* ---------- Footer ---------- */
footer.site{ padding:64px 0 40px; }
.foot-top{
  display:grid; grid-template-columns:1.3fr 1fr 1fr 1fr; gap:40px;
  padding-bottom:48px; border-bottom:1px solid var(--line);
}
@media (max-width:880px){ .foot-top{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .foot-top{ grid-template-columns:1fr; } }
.foot-brand .brand{ margin-bottom:14px; }
.foot-brand p{ color:var(--ink-soft); font-size:14px; max-width:280px; }
.foot-col h4{ font-family:'DM Mono',monospace; font-size:11px; text-transform:uppercase; letter-spacing:.08em; color:var(--spec); margin-bottom:16px; font-weight:500;}
.foot-col a{ display:block; color:var(--ink-soft); font-size:14px; margin-bottom:10px; transition:color .2s var(--ease); }
.foot-col a:hover{ color:var(--ink); }
.foot-bottom{
  display:flex; justify-content:space-between; align-items:center;
  padding-top:28px; flex-wrap:wrap; gap:12px;
}
.foot-bottom .mono{ color:var(--ink-soft); }

/* ---------- Forms (career page) ---------- */
.form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:24px; }
@media (max-width:720px){ .form-grid{ grid-template-columns:1fr; } }
.field{ display:flex; flex-direction:column; gap:8px; }
.field.full{ grid-column:1/-1; }
.field label{ font-family:'DM Mono',monospace; font-size:11px; text-transform:uppercase; letter-spacing:.06em; color:var(--ink-soft); }
.field input, .field select, .field textarea{
  font-family:'DM Sans',sans-serif; font-size:15px;
  background:var(--paper); border:1px solid var(--line-strong);
  border-radius:var(--radius); padding:13px 14px; color:var(--ink);
  transition:border-color .2s var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus{ border-color:var(--signal); }
.field textarea{ resize:vertical; min-height:120px; }
.form-submit{ margin-top:8px; }
.role-card{
  border:1px solid var(--line); padding:28px; display:flex; justify-content:space-between; align-items:center; gap:20px; flex-wrap:wrap;
}
.role-card + .role-card{ border-top:none; }
.role-card h3{ font-size:19px; margin-bottom:6px; }
.role-card .meta{ color:var(--ink-soft); font-size:14px; font-family:'DM Mono',monospace; }

.fade-up{ opacity:0; transform:translateY(18px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.fade-up.in{ opacity:1; transform:translateY(0); }