:root{
  --paper:#EDF1F4;
  --panel:#FFFFFF;
  --ink:#101B2D;
  --steel:#5A7184;
  --line:#C8D2DA;
  --copper:#B65A24;
  --signal:#1F8A5D;
  --radius:6px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'Source Sans 3',sans-serif;
  font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--copper);color:#fff}
a{color:inherit}
.mono{font-family:'IBM Plex Mono',monospace}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* ---------- nav ---------- */
nav{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-family:'IBM Plex Mono',monospace;font-size:14px;letter-spacing:.04em;font-weight:500;text-decoration:none}
.brand b{color:var(--copper);font-weight:500}
.nav-cta{
  font-family:'IBM Plex Mono',monospace;font-size:13px;text-decoration:none;
  border:1.5px solid var(--ink);padding:8px 16px;border-radius:var(--radius);
  transition:background .15s,color .15s;
}
.nav-cta:hover,.nav-cta:focus-visible{background:var(--ink);color:var(--paper)}

/* ---------- hero ---------- */
header.hero{padding:88px 0 64px;border-bottom:1px solid var(--line)}
.eyebrow{
  font-family:'IBM Plex Mono',monospace;font-size:12.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--copper);margin-bottom:20px;
}
h1{
  font-family:'Archivo',sans-serif;font-weight:800;
  font-size:clamp(34px,5vw,54px);line-height:1.08;letter-spacing:-.015em;
  max-width:820px;
}
.hero-sub{max-width:640px;margin-top:22px;font-size:19px;color:var(--steel)}
.hero-actions{margin-top:36px;display:flex;gap:14px;flex-wrap:wrap}
.btn{
  font-family:'IBM Plex Mono',monospace;font-size:14px;text-decoration:none;
  padding:13px 22px;border-radius:var(--radius);display:inline-block;
  transition:transform .12s, background .15s, color .15s;
}
.btn:focus-visible{outline:2.5px solid var(--copper);outline-offset:2px}
.btn-primary{background:var(--copper);color:#fff;border:1.5px solid var(--copper)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost{border:1.5px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}

/* ---------- schematic flow (signature element) ---------- */
.flow{
  margin-top:56px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:34px 30px;overflow-x:auto;
}
.flow-title{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--steel);
  letter-spacing:.1em;text-transform:uppercase;margin-bottom:24px}
.flow-track{display:flex;align-items:stretch;gap:0;min-width:640px}
.flow-node{
  flex:1;border:1.5px solid var(--ink);border-radius:var(--radius);
  padding:16px 14px;background:var(--paper);position:relative;
}
.flow-node .tag{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--copper);letter-spacing:.08em;text-transform:uppercase}
.flow-node h3{font-family:'Archivo',sans-serif;font-size:16px;font-weight:700;margin:6px 0 4px}
.flow-node p{font-size:14px;color:var(--steel);line-height:1.45}
.flow-pipe{
  align-self:center;width:56px;height:0;border-top:2px dashed var(--copper);
  position:relative;flex-shrink:0;
}
.flow-pipe::after{
  content:'';position:absolute;right:-1px;top:-5px;
  border:4px solid transparent;border-left:7px solid var(--copper);
}
.flow-status{margin-top:22px;font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--signal)}
.flow-status::before{content:'● ';}

/* ---------- sections ---------- */
section{padding:72px 0;border-bottom:1px solid var(--line)}
.sec-label{
  font-family:'IBM Plex Mono',monospace;font-size:12.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--copper);margin-bottom:14px;
}
h2{font-family:'Archivo',sans-serif;font-weight:800;font-size:clamp(26px,3.4vw,36px);letter-spacing:-.01em;max-width:700px}
.sec-sub{color:var(--steel);max-width:640px;margin-top:14px;font-size:18px}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;
}
.card .mono-tag{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--copper);letter-spacing:.08em}
.card h3{font-family:'Archivo',sans-serif;font-size:19px;font-weight:700;margin:10px 0 8px}
.card p{font-size:15.5px;color:var(--steel)}

/* ---------- offer ---------- */
.offer{
  margin-top:44px;background:var(--ink);color:var(--paper);
  border-radius:var(--radius);padding:40px 36px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center;
}
.offer h3{font-family:'Archivo',sans-serif;font-size:26px;font-weight:800;letter-spacing:-.01em}
.offer p{margin-top:12px;color:#B9C4D0;font-size:16.5px}
.offer .terms-line{font-family:'IBM Plex Mono',monospace;font-size:13px;margin-top:18px;color:var(--paper)}
.offer .terms-line b{color:#E0A176;font-weight:500}
.offer-side{text-align:center}
.offer-side .btn-primary{width:100%;text-align:center}
.offer-side .note{font-family:'IBM Plex Mono',monospace;font-size:12px;color:#8FA0B3;margin-top:12px}

/* ---------- footer ---------- */
footer{padding:44px 0 56px}
.foot-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.foot-links{display:flex;gap:22px;font-family:'IBM Plex Mono',monospace;font-size:13px}
.foot-links a{color:var(--steel);text-decoration:none}
.foot-links a:hover{color:var(--ink);text-decoration:underline}
.foot-note{font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--steel)}

/* ---------- legal pages ---------- */
.legal{max-width:760px;margin:0 auto;padding:64px 24px 96px}
.legal h1{font-size:clamp(28px,4vw,40px)}
.legal .updated{font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--steel);margin:14px 0 40px}
.legal h2{font-size:22px;margin:44px 0 12px;max-width:none}
.legal p,.legal li{color:#2A3A50;font-size:16.5px;margin-bottom:14px}
.legal ul{padding-left:24px;margin-bottom:14px}
.legal .highlight{
  background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--copper);
  border-radius:var(--radius);padding:18px 20px;margin:20px 0;
}

@media (max-width:820px){
  .grid3{grid-template-columns:1fr}
  .offer{grid-template-columns:1fr}
  header.hero{padding:60px 0 48px}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .btn,.nav-cta{transition:none}
}

/* ---------- demo section ---------- */
.demo-sec{
  background:var(--ink);
  border-bottom:none;
  padding:78px 0;
  position:relative;overflow:hidden;
}
.demo-sec::after{
  content:"";position:absolute;top:-30%;right:-10%;width:520px;height:520px;
  background:radial-gradient(circle, rgba(182,90,36,.22) 0%, transparent 68%);
  pointer-events:none;
}
.demo-inner{
  display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;
  position:relative;z-index:1;
}
.demo-sec .sec-label{color:#E0A176}
.demo-copy h2{
  color:var(--paper);max-width:none;line-height:1.14;
  font-size:clamp(28px,3.4vw,40px);
}
.demo-em{color:#E0A176}
.demo-sub{color:#A9B8C7;font-size:17.5px;margin-top:16px;max-width:460px;line-height:1.55}
.demo-steps{list-style:none;margin:28px 0 32px;padding:0;display:grid;gap:12px}
.demo-steps li{
  display:flex;align-items:center;gap:14px;
  color:#D3DCE5;font-size:15.5px;
}
.demo-steps li span{
  font-family:'IBM Plex Mono',monospace;font-size:12px;color:#E0A176;
  border:1px solid rgba(224,161,118,.42);border-radius:4px;
  padding:4px 7px;flex-shrink:0;letter-spacing:.04em;
}
.demo-sec .btn-primary{background:var(--copper);border-color:var(--copper)}

.demo-phone{display:flex;flex-direction:column;align-items:center}
.phone-shell{
  position:relative;width:100%;max-width:300px;aspect-ratio:9/16;
  background:#000;border:9px solid #16202F;border-radius:34px;overflow:hidden;
  box-shadow:0 26px 70px rgba(0,0,0,.55), 0 0 0 1px rgba(224,161,118,.18);
}
.phone-shell iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.phone-tag{
  margin-top:16px;font-family:'IBM Plex Mono',monospace;font-size:11.5px;
  letter-spacing:.09em;text-transform:uppercase;color:#8FA0B3;
}

/* ---------- trust strip ---------- */
.trust{background:var(--panel);border-top:1px solid var(--line);border-bottom:none;padding:42px 0}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.trust-item{display:flex;flex-direction:column;gap:8px}
.tnum{font-family:'IBM Plex Mono',monospace;font-size:21px;color:var(--copper);letter-spacing:.02em}
.tlab{font-size:14px;color:var(--steel);line-height:1.4}

/* ---------- polish ---------- */
.card{transition:border-color .15s, transform .15s}
.card:hover{border-color:var(--copper);transform:translateY(-2px)}
.flow-node{transition:border-color .15s}
.flow-node:hover{border-color:var(--copper)}

@media (max-width:900px){
  .demo-inner{grid-template-columns:1fr;gap:38px}
  .demo-copy h2{text-align:left}
  .phone-shell{max-width:270px}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:26px}
}