/* ═══════════════════════════════════════════════════════════
   TitanOS — dark, deep-tech, neon-accented minimalism
   ═══════════════════════════════════════════════════════════ */

*{box-sizing:border-box;margin:0;padding:0;}

:root{
  /* Near-black backgrounds with very subtle warmth */
  --bg:#07090d;
  --bg-soft:#0b0e14;
  --bg-alt:#10141c;
  --bg-card:#0d1119;
  --border:rgba(255,255,255,0.06);
  --border-hi:rgba(255,255,255,0.12);
  --border-neon:rgba(20,184,166,0.22);

  /* Ink */
  --ink:#f1f5fb;
  --ink-soft:#c8d0dd;
  --ink-mute:#7a8499;
  --ink-faint:#4a5364;

  /* Neon palette — restrained, only when it matters */
  --neon-cyan:#22d3ee;
  --neon-teal:#14f0c3;
  --neon-green:#10f09e;
  --neon-blue:#3b9cff;
  --neon-violet:#a78bfa;
  --neon-orange:#ff6a3d;
  --neon-amber:#ff8c42;

  --tint-cyan:rgba(34,211,238,0.08);
  --tint-teal:rgba(20,240,195,0.08);
  --tint-green:rgba(16,240,158,0.08);
  --tint-blue:rgba(59,156,255,0.08);
  --tint-violet:rgba(167,139,250,0.08);
  --tint-orange:rgba(255,106,61,0.09);

  /* Neon gradient */
  --grad:linear-gradient(135deg,#3b9cff 0%,#22d3ee 40%,#14f0c3 70%,#10f09e 100%);
  --grad-line:linear-gradient(90deg,#3b9cff 0%,#22d3ee 40%,#14f0c3 70%,#10f09e 100%);

  --r:10px;
  --r-lg:16px;
  --max:1240px;
}

html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Inter","Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none;}

.grad-text{
  background:var(--grad);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* Ambient background — very subtle radial glows */
body::before{
  content:'';
  position:fixed;inset:0;
  background:
    radial-gradient(ellipse 900px 600px at 15% 10%, rgba(59,156,255,0.04), transparent 60%),
    radial-gradient(ellipse 800px 500px at 90% 85%, rgba(16,240,158,0.035), transparent 60%);
  pointer-events:none;z-index:0;
}
body > *{position:relative;z-index:1;}

/* ─── NAV ──────────────────────────────────────────────── */
.nav{
  position:sticky;top:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 48px;height:68px;
  background:rgba(7,9,13,0.72);
  backdrop-filter:saturate(180%) blur(16px);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid var(--border);
}
.nav-logo img{height:32px;width:auto;display:block;}
.nav-links{display:flex;gap:34px;list-style:none;align-items:center;}
.nav-links a{
  font-size:13.5px;color:var(--ink-mute);
  letter-spacing:.005em;
  transition:color .15s;
}
.nav-links a:hover,.nav-links a.active{color:var(--ink);}

.nav-cta{
  font-size:13px;font-weight:500;
  padding:9px 18px;border-radius:8px;
  background:var(--neon-teal);color:#07090d;
  transition:all .15s;
}
.nav-cta:hover{
  background:var(--neon-green);
  box-shadow:0 0 24px rgba(20,240,195,0.35);
  transform:translateY(-1px);
}

.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--ink);margin:5px 0;transition:.2s;}

/* ─── BUTTONS ──────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:500;
  padding:12px 24px;border-radius:8px;
  border:none;cursor:pointer;
  font-family:inherit;
  transition:all .18s ease;
  text-decoration:none;
  white-space:nowrap;
}
.btn-primary{background:var(--neon-teal);color:#07090d;}
.btn-primary:hover{
  background:var(--neon-green);
  box-shadow:0 0 32px rgba(20,240,195,0.45);
  transform:translateY(-1px);
}
.btn-ghost{
  background:transparent;color:var(--ink);
  border:1px solid var(--border-hi);
}
.btn-ghost:hover{
  border-color:var(--neon-teal);
  color:var(--neon-teal);
  background:rgba(20,240,195,0.04);
}
.btn-arrow::after{content:'→';transition:transform .2s;}
.btn-arrow:hover::after{transform:translateX(3px);}

/* ─── LAYOUT PRIMITIVES ────────────────────────────────── */
.container{max-width:var(--max);margin:0 auto;padding:0 48px;}

.section{padding:120px 0;border-bottom:1px solid var(--border);}
.section.tight{padding:80px 0;}
.section.soft{background:var(--bg-soft);}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11.5px;font-weight:500;
  text-transform:uppercase;letter-spacing:.16em;
  color:var(--neon-teal);
  margin-bottom:24px;
}
.eyebrow::before{
  content:'';width:24px;height:1px;
  background:var(--neon-teal);
  box-shadow:0 0 8px rgba(20,240,195,0.6);
}

h1,h2,h3{color:var(--ink);letter-spacing:-.02em;font-weight:300;}
h1{font-size:clamp(40px,5.4vw,72px);line-height:1.02;}
h1 strong{font-weight:500;}
h2{font-size:clamp(30px,3.6vw,48px);line-height:1.12;}
h2 strong{font-weight:500;}
h3{font-size:20px;font-weight:500;line-height:1.3;letter-spacing:-.01em;}

.lede{font-size:17px;line-height:1.65;color:var(--ink-soft);max-width:620px;font-weight:300;}
.body-text{font-size:15px;line-height:1.7;color:var(--ink-mute);}

/* ─── CARDS ────────────────────────────────────────────── */
.card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:32px;
  transition:border-color .25s,transform .25s,box-shadow .25s,background .25s;
  position:relative;
  overflow:hidden;
}
.card::before{
  content:'';
  position:absolute;inset:0;
  background:radial-gradient(600px circle at var(--mx,50%) var(--my,-20%),rgba(20,240,195,0.06),transparent 40%);
  opacity:0;transition:opacity .3s;
  pointer-events:none;
}
.card:hover{
  border-color:var(--border-hi);
  transform:translateY(-3px);
  background:var(--bg-alt);
}
.card:hover::before{opacity:1;}

.card-icon{
  width:44px;height:44px;
  border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:22px;
  position:relative;
}
.card-icon.cyan{background:var(--tint-cyan);color:var(--neon-cyan);border:1px solid rgba(34,211,238,0.2);}
.card-icon.teal{background:var(--tint-teal);color:var(--neon-teal);border:1px solid rgba(20,240,195,0.2);}
.card-icon.green{background:var(--tint-green);color:var(--neon-green);border:1px solid rgba(16,240,158,0.2);}
.card-icon.blue{background:var(--tint-blue);color:var(--neon-blue);border:1px solid rgba(59,156,255,0.2);}
.card-icon.violet{background:var(--tint-violet);color:var(--neon-violet);border:1px solid rgba(167,139,250,0.2);}
.card-icon.orange{background:var(--tint-orange);color:var(--neon-orange);border:1px solid rgba(255,106,61,0.22);}
.card-icon.neutral{background:rgba(255,255,255,0.03);color:var(--ink-soft);border:1px solid var(--border-hi);}

.card h3{margin-bottom:10px;color:var(--ink);}
.card p{font-size:14.5px;line-height:1.65;color:var(--ink-mute);}

/* ─── GRIDS ────────────────────────────────────────────── */
.grid{display:grid;gap:16px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

/* ─── SECTION HEADERS ──────────────────────────────────── */
.section-header{max-width:760px;margin-bottom:64px;}
.section-header.center{margin:0 auto 64px;text-align:center;}
.section-header.center .eyebrow{justify-content:center;}
.section-header h2{margin-bottom:20px;}

/* ─── CTA BAND ─────────────────────────────────────────── */
.cta-band{
  padding:120px 0;
  background:var(--bg-soft);
  border-bottom:1px solid var(--border);
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-band::before{
  content:'';
  position:absolute;left:50%;top:50%;
  transform:translate(-50%,-50%);
  width:800px;height:400px;
  background:radial-gradient(ellipse,rgba(20,240,195,0.08),transparent 70%);
  pointer-events:none;
}
.cta-band > .container{position:relative;z-index:1;}
.cta-band .eyebrow{justify-content:center;}
.cta-band h2{margin-bottom:20px;max-width:680px;margin-left:auto;margin-right:auto;}
.cta-band .lede{margin:0 auto 36px;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* ─── FOOTER ───────────────────────────────────────────── */
.footer{
  padding:72px 0 40px;
  background:var(--bg);
  border-top:1px solid var(--border);
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:56px;
  margin-bottom:56px;
}
.footer-brand img{height:32px;margin-bottom:18px;}
.footer-brand p{font-size:14px;color:var(--ink-mute);line-height:1.6;max-width:300px;}
.footer-col h4{
  font-size:12px;font-weight:600;
  text-transform:uppercase;letter-spacing:.12em;
  color:var(--ink);margin-bottom:18px;
}
.footer-col a{
  display:block;font-size:13.5px;
  color:var(--ink-mute);margin-bottom:10px;
  transition:color .15s;
}
.footer-col a:hover{color:var(--neon-teal);}
.footer-bottom{
  padding-top:28px;
  border-top:1px solid var(--border);
  display:flex;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--ink-faint);
  flex-wrap:wrap;gap:16px;
}
.footer-social{display:flex;gap:22px;}
.footer-social a{color:var(--ink-mute);transition:color .15s;}
.footer-social a:hover{color:var(--neon-teal);}

/* ─── RESPONSIVE ───────────────────────────────────────── */
@media (max-width:1024px){
  .nav{padding:0 32px;}
  .nav-links{gap:22px;}
  .container{padding:0 32px;}
  .section{padding:96px 0;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}

@media (max-width:720px){
  .nav{padding:0 20px;height:60px;}
  .nav-logo img{height:28px;}
  .nav-links{
    display:none;
    position:absolute;top:60px;left:0;right:0;
    flex-direction:column;
    gap:0;padding:20px;
    background:var(--bg);
    border-bottom:1px solid var(--border);
  }
  .nav-links.open{display:flex;}
  .nav-links li{width:100%;border-bottom:1px solid var(--border);}
  .nav-links li:last-child{border-bottom:none;}
  .nav-links a{display:block;padding:12px 0;font-size:15px;}
  .nav-toggle{display:block;}
  .nav-cta{display:none;}
  .container{padding:0 20px;}
  .section{padding:72px 0;}
  .section.tight{padding:56px 0;}
  .section-header{margin-bottom:48px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:40px;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .cta-band{padding:80px 0;}
  .card{padding:24px;}
}