@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,500;0,600;1,500&display=swap');
/* ==========================================================================
   NeuroRealm.ai — design system
   Dark-only. Playfair (display) + system sans (body). The orb is the only
   glowing, moving, saturated thing on the page.
   ========================================================================== */

:root {
  /* color */
  --bg-0:#090816; --bg-1:#0F0D22; --bg-2:#161230;
  --indigo:#2E1065; --violet-700:#5B21B6; --violet:#7C3AED;
  --violet-soft:#A78BFA; --orchid:#C084FC;
  --text-hi:#EDE9FE; --text-mid:#9990B8; --text-lo:#5E5880;
  --line:rgba(167,139,250,.12); --line-strong:rgba(167,139,250,.25);

  /* type */
  --serif:"Playfair Display","Didot","Bodoni MT",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Inter,Roboto,sans-serif;

  /* spacing (8px base) */
  --s1:8px; --s2:16px; --s3:24px; --s4:40px; --s5:64px; --s6:96px; --s7:160px;

  --maxw:1120px; --readw:760px;
  --ease:cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg-0); color:var(--text-hi);
  font-family:var(--sans); font-size:17px; line-height:1.65;
  font-weight:400; -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--violet-soft);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--text-hi)}
::selection{background:var(--violet);color:#fff}

/* ---- layout ---- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(20px,5vw,64px)}
.section{padding:var(--s7) 0}
@media(max-width:760px){.section{padding:var(--s6) 0}}
.center{text-align:center}
.read{max-width:var(--readw);margin-inline:auto}

/* ---- type ---- */
h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.1;letter-spacing:-.01em;color:var(--text-hi);text-wrap:balance}
.display{font-size:clamp(3rem,7vw,5.6rem);line-height:1.05;max-width:18ch}
.h-l{font-size:clamp(2rem,4vw,3.1rem);line-height:1.14;max-width:30ch}
.h-m{font-size:1.75rem;font-weight:600;line-height:1.25}
.eyebrow{font-family:var(--sans);font-size:.8125rem;font-weight:600;text-transform:uppercase;
  letter-spacing:.14em;color:var(--violet-soft);display:block;margin-bottom:var(--s2)}
.lede{font-size:1.25rem;line-height:1.6;color:var(--text-hi);max-width:60ch}
p{color:var(--text-mid);max-width:65ch}
.center p,.center .lede{margin-inline:auto}
.muted{color:var(--text-mid)}
.dim{color:var(--text-lo)}
.stat{font-family:var(--serif);font-size:clamp(2.4rem,5vw,3.4rem);color:var(--orchid);line-height:1}
.orchid{color:var(--orchid)}

/* ---- wordmark ---- */
.wordmark{font-family:var(--serif);font-weight:500;font-size:1.35rem;color:var(--text-hi);
  display:inline-flex;align-items:center;gap:.4em;letter-spacing:.01em}
.wordmark .dot{width:.42em;height:.42em;border-radius:50%;
  background:var(--violet);box-shadow:0 0 12px rgba(124,58,237,.8);display:inline-block}

/* ---- nav ---- */
.nav{position:fixed;inset:0 0 auto 0;z-index:50;height:64px;display:flex;align-items:center;
  transition:background .3s var(--ease),border-color .3s var(--ease);
  border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(15,13,34,.72);backdrop-filter:blur(18px);border-bottom-color:var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;width:100%}
.nav-links{display:flex;align-items:center;gap:var(--s4);list-style:none}
.nav-links a{font-size:.95rem;color:var(--text-mid);font-family:var(--sans)}
.nav-links a:hover,.nav-links a.active{color:var(--text-hi)}
@media(max-width:820px){.nav-links{gap:var(--s3)}.nav-links .hide-sm{display:none}}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--sans);font-size:1rem;
  font-weight:600;padding:13px 26px;border-radius:999px;cursor:pointer;border:1px solid transparent;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),color .2s}
.btn-primary{background:linear-gradient(135deg,#7C3AED,#5B21B6);color:#fff}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.12);
  box-shadow:0 0 28px rgba(124,58,237,.4);color:#fff}
.btn-ghost{background:transparent;color:var(--text-hi);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--violet-soft);color:var(--text-hi)}
.cta-row{display:flex;gap:var(--s2);flex-wrap:wrap;margin-top:var(--s4)}
.center .cta-row{justify-content:center}

/* ---- the orb ---- */
.orb{width:min(78vw,620px);aspect-ratio:1;margin:0 auto;position:relative}
.orb::before{content:"";position:absolute;inset:-18%;border-radius:50%;
  background:radial-gradient(circle,rgba(124,58,237,.34)0%,rgba(46,16,101,.16)42%,transparent 70%);
  animation:halo 7s var(--ease) infinite}
.orb img{width:100%;height:100%;mix-blend-mode:screen;position:relative;
  -webkit-mask-image:radial-gradient(circle,#000 42%,transparent 60%);
  mask-image:radial-gradient(circle,#000 42%,transparent 60%);
  animation:breathe 7s var(--ease) infinite;will-change:transform,filter}
@keyframes breathe{0%,100%{transform:scale(1);filter:brightness(1)}
  46%{transform:scale(1.035);filter:brightness(1.12)}}
@keyframes halo{0%,100%{opacity:.85;transform:scale(1)}46%{opacity:1;transform:scale(1.06)}}
.orb.dim img{opacity:.7}.orb.dim::before{opacity:.6}

/* soft halo glow that bleeds from a section edge */
.glow{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0;
  background:radial-gradient(circle,rgba(124,58,237,.22),transparent 70%)}

/* ---- cards ---- */
.card{background:var(--bg-1);border:1px solid var(--line);border-radius:20px;padding:var(--s4);
  transition:background .25s var(--ease),border-color .25s var(--ease)}
.card:hover{background:var(--bg-2);border-color:var(--line-strong)}
.grid{display:grid;gap:var(--s3)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:820px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}

/* realms */
.realm{position:relative;overflow:hidden}
.realm .state{font-size:.78rem;color:var(--text-lo);text-transform:uppercase;letter-spacing:.1em;
  font-family:var(--sans)}
.realm.active{border-color:var(--line-strong)}
.realm.active .state{color:var(--violet-soft)}
.realm.soon{opacity:.5}

/* paper card (science) */
.paper{border-left:2px solid var(--line-strong);padding-left:var(--s3)}
.paper .cite{font-size:.9rem;color:var(--text-mid)}
.paper .find{color:var(--text-hi);margin:.4em 0}
.chip{display:inline-block;font-family:var(--sans);font-size:.72rem;letter-spacing:.04em;
  color:var(--violet-soft);border:1px solid var(--line-strong);border-radius:999px;
  padding:2px 10px;margin-top:.5em}
.badge{display:inline-block;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--orchid);border:1px solid rgba(192,132,252,.4);border-radius:999px;padding:2px 10px}

/* device mockup */
.device{border-radius:44px;border:1px solid var(--line-strong);background:#05040c;padding:10px;
  box-shadow:0 40px 120px rgba(46,16,101,.55);max-width:300px}
.device img{border-radius:34px}
.device-stack{position:relative;display:flex;justify-content:center;align-items:flex-start}
.device-stack .back{position:absolute;transform:rotate(8deg) translateX(28%);opacity:.55;max-width:250px;z-index:0}
.device-stack .front{position:relative;z-index:1}

/* divider */
hr.rule{border:0;border-top:1px solid var(--line);margin:var(--s5) 0}

/* ---- footer ---- */
.footer{background:var(--bg-1);border-top:1px solid var(--line);padding:var(--s6) 0 var(--s4)}
.footer .cols{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:var(--s4)}
@media(max-width:820px){.footer .cols{grid-template-columns:1fr 1fr}}
.footer h4{font-family:var(--sans);font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;
  color:var(--text-lo);margin-bottom:var(--s2);font-weight:600}
.footer ul{list-style:none}.footer li{margin-bottom:.6em}
.footer a{color:var(--text-mid);font-size:.95rem}.footer a:hover{color:var(--text-hi)}
.footer .fine{margin-top:var(--s5);padding-top:var(--s3);border-top:1px solid var(--line);
  color:var(--text-lo);font-size:.85rem;display:flex;flex-wrap:wrap;gap:var(--s2) var(--s4);justify-content:space-between}
.disclaimer{color:var(--text-lo);font-size:.85rem;max-width:70ch}

/* ---- legal / prose ---- */
.prose{max-width:760px;margin:0 auto}
.prose h1{font-size:clamp(2rem,4vw,2.8rem);margin-bottom:.3em}
.prose h2{font-size:1.4rem;font-weight:600;margin-top:1.8em;margin-bottom:.4em}
.prose p,.prose li{color:var(--text-mid);max-width:none}
.prose ul{margin:1em 0 1em 1.2em}.prose li{margin-bottom:.5em}
.prose strong{color:var(--text-hi)}
.prose table{border-collapse:collapse;width:100%;margin:1.3em 0}
.prose th,.prose td{border:1px solid var(--line);padding:10px 13px;text-align:left;font-size:.92rem;vertical-align:top}
.prose th{color:var(--violet-soft);font-family:var(--sans);font-weight:600}

/* ---- reveal ---- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* full-bleed hero */
.hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;position:relative;
  padding-top:64px;text-align:center}
.hero .orb{position:absolute;top:50%;left:50%;transform:translate(-50%,-46%);z-index:0;opacity:.95}
.hero .hero-copy{position:relative;z-index:1}

.eyebrow-serif{font-family:var(--serif);font-style:italic;color:var(--violet-soft)}

/* ---- reduced motion ---- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .orb img,.orb::before{animation:none;transform:scale(1.02)}
  .reveal{opacity:1;transform:none;transition:none}
}