/* ===== AI Atlas — design tokens ===== */
:root{
  --ink: #1B2A3A;         /* deep navy-ink background */
  --ink-2: #22344A;       /* lighter ink panel */
  --parchment: #F5F2E8;   /* light section bg */
  --paper: #FBF9F3;       /* card bg on light sections */
  --brass: #C9A24B;       /* signature accent */
  --brass-dim: #A98A44;
  --teal: #5B8C86;        /* secondary accent */
  --ink-text: #EDEDE3;    /* text on dark */
  --dark-text: #22303F;   /* text on light */
  --line: rgba(237,237,227,0.18);
  --line-dark: rgba(34,48,63,0.14);

  --display: "Fraunces", Georgia, serif;
  --body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--body);
  background:var(--parchment);
  color:var(--dark-text);
  line-height:1.55;
}
img{max-width:100%;display:block;}
a{color:inherit;}

.container{max-width:1080px;margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{
  background:var(--ink);
  color:var(--ink-text);
  padding:18px 0;
  position:sticky; top:0; z-index:50;
  border-bottom:1px solid var(--line);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;}
.logo{
  font-family:var(--display);
  font-size:1.35rem;
  font-weight:600;
  letter-spacing:.01em;
  text-decoration:none;
  color:var(--ink-text);
  display:flex;align-items:center;gap:8px;
}
.logo .mark{color:var(--brass);font-size:1.1em;}
.nav-links{display:flex;gap:28px;font-family:var(--mono);font-size:.82rem;letter-spacing:.03em;text-transform:uppercase;}
.nav-links a{text-decoration:none;opacity:.8;transition:opacity .2s;}
.nav-links a:hover{opacity:1;color:var(--brass);}

/* ---------- Hero ---------- */
.hero{
  background:var(--ink);
  color:var(--ink-text);
  padding:88px 0 110px;
  position:relative;
  overflow:hidden;
}
.hero .container{position:relative;z-index:2;}
.eyebrow{
  font-family:var(--mono);
  font-size:.78rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--brass);
  margin-bottom:18px;
  display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--brass);display:inline-block;}
.hero h1{
  font-family:var(--display);
  font-size:clamp(2.4rem, 5vw, 4rem);
  font-weight:600;
  line-height:1.05;
  max-width:14ch;
  margin:0 0 24px;
}
.hero h1 em{font-style:italic;color:var(--brass);}
.hero p.lede{
  font-size:1.15rem;
  max-width:52ch;
  color:rgba(237,237,227,0.78);
  margin:0 0 40px;
}

/* Route map graphic */
.route-map{
  margin-top:56px;
  display:grid;
  grid-template-columns:1fr;
  gap:0;
}
.route{
  display:flex;
  align-items:flex-start;
  gap:20px;
  position:relative;
  padding:22px 0;
}
.route:not(:last-child)::after{
  content:"";
  position:absolute;
  left:23px; bottom:-2px;
  width:1px; height:24px;
  background:repeating-linear-gradient(to bottom, var(--brass-dim) 0 4px, transparent 4px 9px);
}
.route .coord{
  font-family:var(--mono);
  font-size:.78rem;
  color:var(--brass);
  border:1px solid var(--brass-dim);
  border-radius:50%;
  width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
  background:rgba(201,162,75,0.06);
}
.route-body h3{
  font-family:var(--display);
  font-size:1.25rem;
  margin:2px 0 6px;
  font-weight:600;
  color:var(--dark-text);
}
.route-body p{
  margin:0;
  color:#48566A;
  font-size:.96rem;
  max-width:56ch;
}
.route-body a.go{
  display:inline-block;
  margin-top:10px;
  font-family:var(--mono);
  font-size:.78rem;
  letter-spacing:.04em;
  text-transform:uppercase;
  color:var(--brass);
  text-decoration:none;
  border-bottom:1px solid var(--brass-dim);
  padding-bottom:2px;
}
.route-body a.go:hover{color:var(--dark-text);border-color:var(--dark-text);}

.hero-grid{display:grid;grid-template-columns:1.1fr 0.9fr;gap:40px;align-items:center;}
.hero-copy .lede{margin-bottom:32px;}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;}
.btn-hero-primary{
  background:var(--brass);color:var(--ink);
  font-family:var(--mono);font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;font-weight:600;
  padding:15px 28px;border-radius:3px;text-decoration:none;display:inline-block;
}
.btn-hero-primary:hover{background:#dab35c;}
.btn-hero-secondary{
  color:var(--ink-text);border:1px solid var(--line);
  font-family:var(--mono);font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;
  padding:15px 28px;border-radius:3px;text-decoration:none;display:inline-block;
}
.btn-hero-secondary:hover{border-color:var(--brass);color:var(--brass);}
.hero-art{display:flex;justify-content:center;}
.hero-art svg{width:100%;max-width:360px;height:auto;}

.why-section{background:var(--parchment);}
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:28px;margin-top:12px;}
.why-card{background:var(--paper);border:1px solid var(--line-dark);border-radius:6px;padding:26px;}
.why-card svg{margin-bottom:14px;}
.why-card h3{font-family:var(--display);font-size:1.1rem;margin:0 0 8px;}
.why-card p{font-size:.94rem;color:#4A5568;margin:0;}

@media (max-width:820px){
  .hero-grid{grid-template-columns:1fr;}
  .hero-art{order:-1;max-width:260px;margin:0 auto 20px;}
}

/* ---------- Sections on parchment ---------- */
.section{padding:80px 0;}
.section-head{max-width:60ch;margin-bottom:44px;}
.section-head .eyebrow{color:var(--brass-dim);}
.section-head .eyebrow::before{background:var(--brass-dim);}
.section-head h2{
  font-family:var(--display);
  font-size:clamp(1.8rem,3vw,2.4rem);
  font-weight:600;
  margin:0 0 12px;
  color:var(--dark-text);
}
.section-head p{color:#48566A;font-size:1.05rem;margin:0;}

.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(260px,1fr));
  gap:22px;
}
.card{
  background:var(--paper);
  border:1px solid var(--line-dark);
  border-radius:4px;
  padding:28px;
  transition:transform .2s, box-shadow .2s;
}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(27,42,58,0.08);}
.card .tag{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--teal);
  margin-bottom:10px;
  display:block;
}
.card h3{font-family:var(--display);font-size:1.15rem;margin:0 0 10px;}
.card p{font-size:.94rem;color:#4A5568;margin:0 0 14px;}
.card a.read{
  font-family:var(--mono);
  font-size:.78rem;
  text-transform:uppercase;
  letter-spacing:.03em;
  text-decoration:none;
  color:var(--dark-text);
  border-bottom:1px solid var(--dark-text);
  padding-bottom:2px;
}

/* ---------- Email capture ---------- */
.capture{
  background:var(--ink-2);
  color:var(--ink-text);
  padding:64px 0;
  text-align:center;
}
.capture h2{font-family:var(--display);font-size:1.9rem;margin:0 0 12px;}
.capture p{color:rgba(237,237,227,0.72);max-width:48ch;margin:0 auto 28px;}
.capture-form{display:flex;justify-content:center;gap:0;max-width:420px;margin:0 auto;}
.capture-form input{
  flex:1;
  padding:14px 16px;
  border:1px solid var(--line);
  background:rgba(255,255,255,0.04);
  color:var(--ink-text);
  font-family:var(--body);
  font-size:.95rem;
  border-radius:2px 0 0 2px;
}
.capture-form input::placeholder{color:rgba(237,237,227,0.45);}
.capture-form button{
  padding:14px 24px;
  background:var(--brass);
  color:var(--ink);
  border:none;
  font-family:var(--mono);
  font-size:.82rem;
  text-transform:uppercase;
  letter-spacing:.04em;
  font-weight:600;
  border-radius:0 2px 2px 0;
  cursor:pointer;
}
.capture-form button:hover{background:#dab35c;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--ink);
  color:rgba(237,237,227,0.55);
  padding:40px 0;
  font-size:.85rem;
}
.site-footer .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;}
.site-footer a{color:rgba(237,237,227,0.7);text-decoration:none;}
.disclosure{max-width:64ch;font-size:.8rem;line-height:1.5;margin-top:18px;color:rgba(237,237,227,0.45);}

/* ---------- Guide article page ---------- */
.article-head{background:var(--ink);color:var(--ink-text);padding:56px 0 70px;}
.article-head h1{font-family:var(--display);font-size:clamp(2rem,4vw,2.8rem);max-width:20ch;margin:14px 0 16px;font-weight:600;}
.article-head .meta{font-family:var(--mono);font-size:.78rem;color:rgba(237,237,227,0.55);text-transform:uppercase;letter-spacing:.04em;}
.article-body{max-width:68ch;margin:0 auto;padding:56px 24px;}
.article-body h2{font-family:var(--display);font-size:1.5rem;margin-top:44px;color:var(--dark-text);}
.article-body p{font-size:1.03rem;color:#33404F;}
.article-body ul{padding-left:1.2em;}
.article-body li{margin-bottom:8px;}
.callout{
  background:var(--paper);
  border-left:3px solid var(--brass);
  padding:18px 22px;
  margin:28px 0;
  font-size:.95rem;
}
.callout strong{color:var(--brass-dim);font-family:var(--mono);font-size:.78rem;text-transform:uppercase;display:block;margin-bottom:6px;}

@media (max-width:640px){
  .nav-links{display:none;}
  .capture-form{flex-direction:column;}
  .capture-form input, .capture-form button{border-radius:2px;}
}