/* ============================================
   AICH SQUARED — design tokens
   ============================================ */
:root{
  --ink:        #0F1826;
  --ink-2:      #16233B;
  --ink-3:      #1C2A45;
  --paper:      #ECEAE2;
  --paper-dim:  #9AA6B8;
  --cyan:       #7FD6E8;
  --cyan-dim:   rgba(127,214,232,0.28);
  --amber:      #E8A33D;
  --line:       rgba(127,214,232,0.16);

  --font-display: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-body:    'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  --wrap: 1180px;
  --radius: 4px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

.wrap{ max-width:var(--wrap); margin:0 auto; padding:0 32px; }

h1,h2,h3{ font-family:var(--font-display); font-weight:600; line-height:1.12; margin:0; color:var(--paper); }
p{ margin:0; }
a{ color:inherit; text-decoration:none; }

.sq{ color:var(--cyan); font-size:0.7em; vertical-align:super; }

/* faint blueprint grid across whole page */
.grid-overlay{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 75%);
}

.eyebrow, .section-label{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.02em;
  color:var(--cyan);
  text-transform:none;
}

/* ============================================
   HEADER
   ============================================ */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(15,24,38,0.86);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:72px;
}
.logo{
  font-family:var(--font-display);
  font-weight:700;
  font-size:20px;
  letter-spacing:0.01em;
}
.main-nav{ display:flex; gap:32px; }
.main-nav a{
  font-size:14px; color:var(--paper-dim);
  transition:color 0.15s ease;
}
.main-nav a:hover{ color:var(--paper); }
.nav-cta{ white-space:nowrap; }

.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:32px; height:32px; background:none; border:none; cursor:pointer;
}
.nav-toggle span{ display:block; height:2px; width:100%; background:var(--paper); }

/* ============================================
   BUTTONS
   ============================================ */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  font-family:var(--font-mono);
  font-size:14px;
  padding:12px 22px;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--cyan); color:var(--ink); font-weight:500; }
.btn-primary:hover{ background:#97e0ef; }
.btn-outline{ border-color:var(--line); color:var(--paper); }
.btn-outline:hover{ border-color:var(--cyan); color:var(--cyan); }
.btn-ghost{ border-color:var(--cyan-dim); color:var(--cyan); font-size:13px; padding:9px 18px; }
.btn-ghost:hover{ background:var(--cyan-dim); }

/* ============================================
   HERO
   ============================================ */
.hero{ position:relative; z-index:1; padding:96px 0 80px; }
.hero-inner{
  display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center;
}
.hero-copy .eyebrow{ margin-bottom:20px; }
.hero h1{
  font-size:clamp(34px,4.2vw,56px);
  max-width:12ch;
}
.hero h1 em{ font-style:normal; color:var(--cyan); }
.hero-sub{
  margin-top:24px; max-width:46ch;
  font-size:17px; color:var(--paper-dim);
}
.hero-actions{ display:flex; gap:16px; margin-top:36px; flex-wrap:wrap; }

.hero-stats{
  display:flex; gap:40px; margin-top:56px; padding-top:28px;
  border-top:1px solid var(--line);
}
.hero-stats dt{
  font-family:var(--font-mono); font-size:12px; color:var(--cyan); margin-bottom:6px;
}
.hero-stats dd{ margin:0; font-size:14px; color:var(--paper-dim); max-width:20ch; }

/* schematic diagram */
.hero-diagram{ width:100%; }
.schematic{ width:100%; height:auto; overflow:visible; }
.schematic .node rect{
  fill:var(--ink-2); stroke:var(--line); stroke-width:1;
}
.schematic .core-node rect{
  fill:var(--ink-3); stroke:var(--cyan); stroke-width:1.5;
}
.schematic text{
  font-family:var(--font-mono); font-size:13px; fill:var(--paper-dim);
  text-anchor:middle;
}
.schematic .core-node text{ fill:var(--cyan); font-size:22px; font-weight:600; }
.schematic .tiny{ fill:var(--cyan); font-size:16px; }
.schematic .caption{
  font-size:11px; fill:var(--paper-dim); text-anchor:start;
}
.schematic .wire{
  fill:none; stroke:var(--cyan-dim); stroke-width:1.5;
  stroke-dasharray:4 5;
  animation:flow 3.2s linear infinite;
}
.schematic .wire-out{ stroke:var(--amber); opacity:0.55; animation-duration:2.4s; }
@keyframes flow{ to{ stroke-dashoffset:-90; } }

/* ============================================
   SHARED SECTION
   ============================================ */
section{ position:relative; z-index:1; }
.section-label{ margin-bottom:16px; }
.services, .process, .why{ padding:96px 0; border-top:1px solid var(--line); }
.services h2, .process h2, .why h2{
  font-size:clamp(26px,3vw,38px); max-width:18ch; margin-bottom:56px;
}

/* ============================================
   SERVICES
   ============================================ */
.service-grid{
  display:grid; grid-template-columns:repeat(2,1fr); gap:1px;
  background:var(--line); border:1px solid var(--line);
}
.service-card{
  background:var(--ink); padding:36px;
}
.service-card .tag{
  font-family:var(--font-mono); font-size:12px; color:var(--amber); margin-bottom:14px;
}
.service-card h3{ font-size:21px; margin-bottom:12px; }
.service-card p{ color:var(--paper-dim); font-size:15px; }

/* ============================================
   PROCESS — pipeline
   ============================================ */
.pipeline{
  list-style:none; margin:0; padding:0;
  display:grid; grid-template-columns:repeat(4,1fr); gap:0;
  position:relative;
}
.pipeline::before{
  content:""; position:absolute; top:11px; left:0; right:0; height:1px;
  background:var(--line);
}
.pipeline li{ position:relative; padding-top:36px; padding-right:28px; }
.pipeline li::before{
  content:""; position:absolute; top:0; left:0;
  width:23px; height:23px; border-radius:50%;
  background:var(--ink); border:1.5px solid var(--cyan);
}
.step-name{
  display:block; font-family:var(--font-mono); color:var(--cyan);
  font-size:15px; margin-bottom:10px;
}
.pipeline p{ color:var(--paper-dim); font-size:14.5px; }

/* ============================================
   WHY US
   ============================================ */
.why-grid{ display:grid; grid-template-columns:0.9fr 1.4fr; gap:56px; }
.why-intro h2{ position:sticky; top:110px; }
.why-list{ display:flex; flex-direction:column; gap:36px; }
.why-item{ padding-bottom:36px; border-bottom:1px solid var(--line); }
.why-item:last-child{ border-bottom:none; }
.why-item h3{ font-size:19px; margin-bottom:10px; color:var(--paper); }
.why-item p{ color:var(--paper-dim); font-size:15px; max-width:52ch; }

/* ============================================
   CONTACT
   ============================================ */
.contact{ padding:96px 0 110px; border-top:1px solid var(--line); }
.contact-inner{ display:grid; grid-template-columns:1fr 1fr; gap:56px; }
.contact-copy h2{ font-size:clamp(26px,3vw,38px); max-width:16ch; margin:16px 0 20px; }
.contact-sub{ color:var(--paper-dim); font-size:15.5px; max-width:44ch; }
.contact-email{
  display:inline-block; margin-top:28px; font-family:var(--font-mono);
  color:var(--cyan); font-size:15px; padding-bottom:2px; border-bottom:1px solid var(--cyan-dim);
}

.contact-form{ display:flex; flex-direction:column; gap:6px; }
.contact-form label{
  font-family:var(--font-mono); font-size:12px; color:var(--paper-dim);
  margin-top:14px;
}
.contact-form input, .contact-form textarea{
  background:var(--ink-2); border:1px solid var(--line); border-radius:var(--radius);
  color:var(--paper); font-family:var(--font-body); font-size:15px;
  padding:12px 14px; resize:vertical;
}
.contact-form input:focus, .contact-form textarea:focus{
  outline:none; border-color:var(--cyan);
}
.contact-form .btn{ margin-top:22px; align-self:flex-start; }
.form-note{ margin-top:10px; font-size:12.5px; color:var(--paper-dim); }

/* ============================================
   FOOTER
   ============================================ */
.site-footer{ border-top:1px solid var(--line); padding:36px 0; position:relative; z-index:1; }
.footer-inner{
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:20px;
}
.footer-inner nav{ display:flex; gap:24px; }
.footer-inner nav a{ font-size:13.5px; color:var(--paper-dim); }
.footer-inner nav a:hover{ color:var(--cyan); }
.footer-note{ font-size:13px; color:var(--paper-dim); }

/* keyboard focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--cyan); outline-offset:2px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width:960px){
  .hero-inner{ grid-template-columns:1fr; }
  .hero-diagram{ order:-1; max-width:440px; margin:0 auto; }
  .service-grid{ grid-template-columns:1fr; }
  .pipeline{ grid-template-columns:1fr 1fr; row-gap:32px; }
  .pipeline::before{ display:none; }
  .why-grid{ grid-template-columns:1fr; }
  .why-intro h2{ position:static; }
  .contact-inner{ grid-template-columns:1fr; }
}

@media (max-width:680px){
  .wrap{ padding:0 20px; }
  .main-nav, .nav-cta{ display:none; }
  .nav-toggle{ display:flex; }
  .main-nav.open{
    display:flex; flex-direction:column; position:absolute; top:72px; left:0; right:0;
    background:var(--ink); padding:20px 20px 28px; gap:18px; border-bottom:1px solid var(--line);
  }
  .hero{ padding:56px 0 64px; }
  .hero-stats{ flex-direction:column; gap:20px; }
  .services, .process, .why{ padding:64px 0; }
  .pipeline{ grid-template-columns:1fr; }
  .footer-inner{ flex-direction:column; align-items:flex-start; }
}