/* ════════════════════════════════════════════════════════
   Mindsplit AI — Shared Design System
   ════════════════════════════════════════════════════════ */

:root{
  /* Brand colors */
  --midnight:#1A1438;
  --midnight-2:#0F0B27;
  --royal:#3C2A78;
  --vibrant:#7B5FE8;
  --lilac:#B9A7E8;
  --soft:#EADFFF;
  --gradient-1:#9B82F0;
  --gradient-2:#5938C9;
  --grad:linear-gradient(135deg,#9B82F0,#5938C9);
  --grad-2:linear-gradient(135deg,#B9A7E8,#7B5FE8);

  /* Surfaces */
  --bg:#0A0820;
  --surface:#13102E;
  --surface-2:#1A1640;
  --glass:rgba(155,130,240,.04);
  --glass-strong:rgba(155,130,240,.08);

  /* Text */
  --ink:#F8F7FC;
  --ink-dim:#A8A4C0;
  --ink-dimmer:#6F6B8A;

  /* Lines */
  --line:rgba(155,130,240,.08);
  --line-strong:rgba(155,130,240,.16);

  /* Spacing & radius */
  --radius-sm:8px;
  --radius:14px;
  --radius-lg:22px;
  --radius-xl:32px;
  --wrap:1240px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* Background ambient */
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(ellipse 800px 600px at 20% 0%,rgba(123,95,232,.12),transparent 50%),
    radial-gradient(ellipse 600px 500px at 80% 100%,rgba(89,56,201,.08),transparent 50%);
  pointer-events:none;
  z-index:0;
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px;position:relative;z-index:1}

/* Typography */
h1,h2,h3,h4{font-weight:500;letter-spacing:-0.02em;line-height:1.15}
h1{font-size:clamp(40px,5.5vw,72px);font-weight:300;letter-spacing:-0.03em}
h1 strong,h1 .grad{font-weight:600}
h2{font-size:clamp(32px,4vw,48px);font-weight:400}
h3{font-size:clamp(20px,2vw,24px);font-weight:500}
h4{font-size:16px;font-weight:600}
p{color:var(--ink-dim);font-size:16px;line-height:1.7}
p.lead{font-size:19px;color:var(--ink-dim);line-height:1.6}

.grad{
  background:linear-gradient(135deg,#B9A7E8,#7B5FE8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:11px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.18em;
  color:var(--vibrant);
  padding:8px 14px;
  background:rgba(123,95,232,.1);
  border:1px solid rgba(123,95,232,.2);
  border-radius:100px;
}

.eyebrow .dot{
  width:6px;
  height:6px;
  background:var(--vibrant);
  border-radius:50%;
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* ═══════ NAV ═══════ */
.nav{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,8,32,.7);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:32px;width:auto}
.brand-logo.for-light{display:none}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{
  font-size:14px;
  color:var(--ink-dim);
  font-weight:500;
  transition:color .2s;
  position:relative;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{
  content:"";
  position:absolute;
  bottom:-26px;
  left:50%;
  transform:translateX(-50%);
  width:24px;
  height:2px;
  background:var(--vibrant);
  border-radius:2px;
}

.nav-links .mobile-cta{display:none}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  font-size:14.5px;
  font-weight:500;
  border-radius:12px;
  transition:all .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad);
  color:#fff;
  box-shadow:0 4px 16px -4px rgba(123,95,232,.35),inset 0 1px 0 rgba(255,255,255,.15);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 24px -4px rgba(123,95,232,.5),inset 0 1px 0 rgba(255,255,255,.2);
}
.btn-ghost{
  background:transparent;
  color:var(--ink);
  border:1px solid var(--line-strong);
}
.btn-ghost:hover{
  background:var(--glass-strong);
  border-color:rgba(155,130,240,.3);
}
.btn-white{
  background:#fff;
  color:var(--midnight);
  box-shadow:0 18px 50px -10px rgba(0,0,0,.5);
}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 22px 60px -10px rgba(0,0,0,.6)}

/* Sections */
section{padding:100px 0;position:relative;z-index:1}
.sec-head{max-width:720px;margin-bottom:60px}
.sec-head h2{margin:18px 0 18px}

/* Cards */
.card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:32px;
  transition:all .3s ease;
  position:relative;
  overflow:hidden;
}
.card:hover{
  border-color:rgba(155,130,240,.25);
  background:var(--glass-strong);
  transform:translateY(-4px);
}
.card-ico{
  width:48px;
  height:48px;
  border-radius:12px;
  background:rgba(123,95,232,.12);
  border:1px solid rgba(123,95,232,.25);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:20px;
  color:var(--lilac);
}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(20px);transition:all .8s cubic-bezier(.16,1,.3,1)}
.reveal.show{opacity:1;transform:translateY(0)}

/* ═══════ FOOTER (shared) ═══════ */
footer{
  border-top:1px solid var(--line);
  padding:60px 0 30px;
  margin-top:60px;
  position:relative;
  overflow:hidden;
}
.foot-watermark{
  position:absolute;
  right:-40px;
  bottom:-60px;
  width:340px;
  height:auto;
  opacity:0.05;
  pointer-events:none;
  z-index:0;
  transform:rotate(-8deg);
}
footer > .wrap{position:relative;z-index:1}
.foot-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:48px;
  margin-bottom:40px;
}
.foot-col h4{
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:0.12em;
  color:var(--ink-dimmer);
  font-weight:600;
  margin-bottom:18px;
}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.foot-col a{
  font-size:14.5px;
  color:var(--ink-dim);
  transition:color .2s;
}
.foot-col a:hover{color:var(--ink)}
.foot-brand p{font-size:14px;margin-top:14px;max-width:280px}
.foot-bottom{
  border-top:1px solid var(--line);
  padding-top:24px;
  display:flex;
  justify-content:space-between;
  font-size:13px;
  color:var(--ink-dimmer);
  flex-wrap:wrap;
  gap:16px;
}

/* CTA Banner */
.cta-banner{
  background:linear-gradient(135deg,#5938C9 0%,#1A1438 100%);
  border-radius:var(--radius-xl);
  padding:80px 60px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-banner::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 20% 20%,rgba(255,255,255,.08),transparent 50%),
    radial-gradient(circle at 80% 80%,rgba(155,130,240,.1),transparent 50%);
}
.cta-banner > *{position:relative;z-index:1}
.cta-banner h2{color:#fff;margin-bottom:14px}
.cta-banner p{color:rgba(255,255,255,.8);max-width:560px;margin:0 auto 36px;font-size:17px}

/* Mobile nav */
.menu-toggle{
  display:none;
  width:40px;
  height:40px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:var(--glass);
  color:var(--ink);
  align-items:center;
  justify-content:center;
}
.menu-toggle svg{width:18px;height:18px;color:var(--ink)}

/* Responsive */
@media (max-width:900px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .nav-inner .btn-primary{display:none}

  .nav-links.open{
    display:flex;
    position:fixed;
    top:72px;
    left:0;
    right:0;
    height:calc(100vh - 72px);
    height:calc(100dvh - 72px);
    flex-direction:column;
    background:#0A0820;
    padding:24px 24px 32px;
    gap:0;
    align-items:stretch;
    z-index:99;
    overflow-y:auto;
    animation:slideDown .3s ease;
  }
  .nav-links.open a{
    font-size:18px;
    padding:18px 0;
    border-bottom:1px solid rgba(155,130,240,.15);
    color:var(--ink);
    display:block;
  }
  .nav-links.open a::after{display:none}
  .nav-links.open a.active{color:var(--vibrant)}
  .nav-links.open a:last-of-type{border-bottom:none}
  .nav-links.open .mobile-cta{
    margin-top:24px;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    background:var(--grad);
    color:#fff;
    border:none;
    padding:16px;
    border-radius:12px;
    font-weight:500;
    font-size:15px;
    text-align:center;
  }
  .nav-links.open .mobile-cta::after{display:none}

  @keyframes slideDown{
    from{opacity:0;transform:translateY(-10px)}
    to{opacity:1;transform:translateY(0)}
  }

  body.menu-open{overflow:hidden}

  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  section{padding:60px 0}
  .cta-banner{padding:48px 28px}
  .wrap{padding:0 20px}
}
@media (max-width:600px){
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column}
  .nav-inner{height:64px}
  .nav-links.open{
    top:64px;
    height:calc(100vh - 64px);
    height:calc(100dvh - 64px);
  }
  .brand-logo{height:26px}
}