/* ============================================================
   AI Visibility Engine — marketing site
   Shared design system (tokens + header/footer + primitives)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root{
  /* surfaces */
  --bg:#FCFCFD;            /* near-white page base (subtle, designed) */
  --surface:#FFFFFF;       /* raised cards */
  --ink-panel:#0B1220;     /* dark sections / terminal device */
  --ink-panel-2:#111a2b;

  /* text */
  --text:#0B1220;
  --text-2:#3A4658;
  --muted:#5A6472;
  --muted-2:#8A94A6;
  --on-dark:#EAF0F7;
  --on-dark-muted:#8B97A8;

  /* brand */
  --blue:#1488c4;          /* Sage Titans blue, tuned for contrast on white */
  --blue-bright:#23a9e1;   /* the parent brand blue, for dark surfaces */
  --green:#00B87A;         /* signal green (visible/cited) on light */
  --green-bright:#00E599;  /* signal green on dark */

  /* lines */
  --line:#E7ECF3;
  --line-2:#DCE3EC;
  --line-dark:rgba(255,255,255,.08);

  /* type */
  --display:'Space Grotesk',-apple-system,BlinkMacSystemFont,sans-serif;
  --body:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;

  /* layout */
  --max:1200px;
  --gutter:56px;
  --radius:14px;
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{font-family:var(--body);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.6;overflow-x:hidden;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}

.container{max-width:var(--max);margin:0 auto;padding:0 var(--gutter);}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--body);font-weight:600;font-size:15px;border-radius:11px;cursor:pointer;border:none;transition:transform .15s,box-shadow .15s,border-color .15s,color .15s;text-decoration:none;}
.btn-primary{background:var(--green);color:#fff;padding:14px 24px;box-shadow:0 6px 20px rgba(0,184,122,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,184,122,.4);}
.btn-dark{background:var(--ink-panel);color:#fff;padding:14px 24px;}
.btn-dark:hover{transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line-2);padding:13px 22px;}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);}
.btn-lg{font-size:16px;padding:16px 30px;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(252,252,253,.82);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;height:68px;}
.brand{display:flex;align-items:center;gap:11px;}
.brand-mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--green-bright),var(--blue-bright));display:flex;align-items:center;justify-content:center;color:#041427;font-weight:800;font-size:16px;flex-shrink:0;}
.brand-name{font-family:var(--display);font-weight:700;font-size:15.5px;letter-spacing:-.2px;color:var(--text);line-height:1.1;}
.brand-name small{display:block;font-family:var(--body);font-size:9.5px;font-weight:500;letter-spacing:1.3px;text-transform:uppercase;color:var(--muted-2);}
.nav{display:flex;align-items:center;gap:34px;}
.nav a.link{font-size:14.5px;font-weight:500;color:var(--text-2);transition:color .15s;}
.nav a.link:hover{color:var(--text);}
.nav-cta{display:flex;align-items:center;gap:14px;}
.nav-signin{font-size:14.5px;font-weight:600;color:var(--text);}
.nav-signin:hover{color:var(--blue);}
.hamburger{display:none;width:40px;height:40px;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);cursor:pointer;align-items:center;justify-content:center;}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);}
.hamburger span::before{top:-6px;}.hamburger span::after{top:6px;}

/* mobile nav */
.mobile-nav{display:none;position:fixed;inset:68px 0 auto 0;background:var(--surface);border-bottom:1px solid var(--line);padding:18px var(--gutter) 26px;z-index:49;flex-direction:column;gap:4px;box-shadow:0 20px 40px rgba(11,18,32,.08);}
.mobile-nav.open{display:flex;}
.mobile-nav a{padding:12px 0;font-size:16px;font-weight:500;color:var(--text-2);border-bottom:1px solid var(--line);}
.mobile-nav .btn{margin-top:14px;justify-content:center;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-panel);color:var(--on-dark);margin-top:0;}
.site-footer .container{padding-top:56px;padding-bottom:34px;}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid var(--line-dark);}
.foot-brand .brand-name{color:#fff;}
.foot-brand p{margin-top:14px;font-size:13.5px;color:var(--on-dark-muted);max-width:280px;line-height:1.6;}
.foot-col h4{font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--on-dark-muted);margin-bottom:16px;}
.foot-col a{display:block;font-size:14px;color:var(--on-dark);margin-bottom:11px;transition:color .15s;}
.foot-col a:hover{color:var(--green-bright);}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:26px;font-size:12.5px;color:var(--on-dark-muted);flex-wrap:wrap;gap:12px;}
.foot-bottom a{color:var(--on-dark-muted);}
.foot-bottom a:hover{color:var(--on-dark);}

/* ---------- shared section primitives ---------- */
.section{padding:96px 0;}
.section-dark{background:var(--ink-panel);color:var(--on-dark);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.4px;color:var(--blue);border:1px solid rgba(20,136,196,.25);background:rgba(20,136,196,.06);padding:6px 13px;border-radius:100px;margin-bottom:22px;}
.section-dark .eyebrow{color:var(--green-bright);border-color:rgba(0,229,153,.25);background:rgba(0,229,153,.06);}
h2.section-title{font-family:var(--display);font-weight:700;font-size:40px;line-height:1.1;letter-spacing:-1.2px;margin-bottom:16px;}
.section-sub{font-size:17px;color:var(--muted);max-width:560px;line-height:1.6;}
.section-dark .section-sub{color:var(--on-dark-muted);}

@media (max-width:900px){
  :root{--gutter:24px;}
  .nav{display:none;}
  .nav-cta .nav-signin{display:none;}
  .hamburger{display:flex;}
  .foot-top{grid-template-columns:1fr 1fr;gap:30px;}
  h2.section-title{font-size:30px;}
  .section{padding:64px 0;}
}
@media (max-width:520px){
  .foot-top{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
}