:root{
  --bg:#0A0A0A; --midnight:#001F3F; --dpurple:#2A0A2A;
  --white:#fff; --gray:#808080;
  --neon-blue:#00FFFF; --neon-pink:#FF00FF; --neon-green:#39FF14; --neon-yellow:#FFFF00;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; color:var(--white);
  background:linear-gradient(180deg,var(--bg),#05070a 60%,var(--midnight));
  font-family:'Roboto Mono',monospace; letter-spacing:.2px; overflow-x:hidden;
}

/* HUD Header */
.hud{
  position:fixed; top:0; left:0; right:0; height:64px; display:flex; align-items:center; justify-content:space-between;
  padding:0 24px; background:rgba(10,10,10,.35); backdrop-filter:blur(8px); border-bottom:1px solid rgba(255,255,255,.06); z-index:50;
}
.logo{font-family:'Orbitron',sans-serif; font-weight:800; letter-spacing:2px}
.logo .barcode{margin-left:8px; color:var(--gray); font-weight:600}
.hud-nav a{color:#cfe; text-decoration:none; margin:0 12px; font-size:.9rem; position:relative}
.hud-nav a::after{content:''; position:absolute; left:0; bottom:-6px; width:0; height:2px; background:var(--neon-blue); transition:.25s}
.hud-nav a:hover::after{width:100%}
.audio-toggle{
  background:transparent; color:#9ff; border:1px solid rgba(0,255,255,.4); padding:6px 10px; cursor:pointer;
  text-shadow:0 0 6px rgba(0,255,255,.6);
}

/* Hero */
.hero{position:relative; min-height:100vh; display:grid; place-items:center; padding-top:64px; overflow:hidden}
.hero .bg{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; opacity:.22; filter:contrast(120%) saturate(120%)}
#particles{position:absolute; inset:0}
.hero-inner{position:relative; z-index:1; text-align:center; max-width:960px; padding:0 20px}
.lead{color:#cde; opacity:.9}
.scroll-indicator{position:absolute; bottom:24px; left:50%; transform:translateX(-50%); color:#9af; opacity:.7}

/* Glitch Title */
.glitch{
  font-family:'Orbitron',sans-serif; font-weight:800; font-size:clamp(28px,4.6vw,64px);
  text-shadow:0 0 10px rgba(0,255,255,.7);
  position:relative; display:inline-block; letter-spacing:1.5px;
}
.glitch::before,.glitch::after{
  content:attr(data-text); position:absolute; left:0; top:0; width:100%; overflow:hidden; clip-path:inset(0 0 0 0);
}
.glitch::before{color:var(--neon-pink); transform:translate(1px,0)}
.glitch::after{color:var(--neon-green); transform:translate(-1px,0)}
@keyframes glitch-scan{
  0%,100%{clip-path:inset(0 0 90% 0)}
  20%{clip-path:inset(10% 0 70% 0)}
  40%{clip-path:inset(80% 0 5% 0)}
  60%{clip-path:inset(30% 0 40% 0)}
  80%{clip-path:inset(60% 0 20% 0)}
}
.glitch::before,.glitch::after{animation:glitch-scan 2.4s infinite steps(6,end)}

/* CTA */
.cta{display:inline-block; padding:12px 20px; text-decoration:none; color:#022; margin:8px 10px; border:1px solid rgba(0,255,255,.35); position:relative}
.cta.primary{
  background:linear-gradient(90deg,rgba(0,255,255,.12),rgba(255,0,255,.12));
  color:var(--white); box-shadow:0 0 22px rgba(0,255,255,.35);
}
.cta.ghost{background:transparent; color:#aff}
.cta.small{padding:8px 12px; font-size:.85rem}
.cta.xl{padding:16px 28px; font-size:1.1rem}
.cta::before{
  content:''; position:absolute; inset:-2px; border:1px solid rgba(255,255,255,.08); pointer-events:none; filter:drop-shadow(0 0 10px rgba(0,255,255,.4))
}
.cta:hover{box-shadow:0 0 28px rgba(255,0,255,.45); transform:translateZ(0)}
.cta:focus{outline:2px solid var(--neon-yellow); outline-offset:2px}

/* Sections */
.section{padding:96px 24px; max-width:1200px; margin:0 auto}
.section h2{font-family:'Orbitron',sans-serif; letter-spacing:1px; text-shadow:0 0 8px rgba(0,255,255,.3)}
.section.grid .features{display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:18px; list-style:none; padding:0; margin:16px 0 0}
.features li{
  padding:18px; border:1px solid rgba(255,255,255,.08); background:rgba(255,255,255,.02);
  position:relative; transition:.25s; backdrop-filter:blur(4px)
}
.features li:hover{border-color:rgba(0,255,255,.45); box-shadow:0 0 22px rgba(0,255,255,.25)}
.icon{display:inline-block; width:14px; height:14px; margin-right:10px; border-radius:2px}
.neon-blue{background:var(--neon-blue)} .neon-pink{background:var(--neon-pink)}
.neon-green{background:var(--neon-green)} .neon-yellow{background:var(--neon-yellow)}

.diagram{height:360px; border:1px dashed rgba(255,255,255,.15); position:relative}
.timeline{display:flex; gap:16px; overflow:auto; scroll-snap-type:x mandatory; padding-bottom:8px}
.timeline .node{
  flex:0 0 auto; scroll-snap-align:center; border:1px solid rgba(255,255,255,.1); padding:14px 18px; min-width:220px;
  background:rgba(255,255,255,.02)
}

.cta-final{text-align:center}
.counter{font-family:'Orbitron',sans-serif; font-size:1.4rem; color:#9ff; text-shadow:0 0 10px rgba(0,255,255,.6); margin:10px 0 20px}

/* Footer */
.footer{
  border-top:1px solid rgba(255,255,255,.08); padding:24px; display:flex; gap:16px; align-items:center; justify-content:space-between;
  color:#cbd
}
.footer-nav a{color:#9ad; text-decoration:none; margin:0 8px}

/* Boot overlay */
#boot{
  position:fixed; inset:0; background:#000; display:grid; place-items:center; color:#9ff; z-index:100;
  transition:opacity .4s ease;
}
#boot .scanline{
  position:absolute; top:-100px; left:0; right:0; height:100px; background:linear-gradient(180deg,rgba(0,255,255,.0),rgba(0,255,255,.2),rgba(0,255,255,.0));
  animation:scan 1.2s linear infinite;
}
#boot .boot-log{font-family:'Roboto Mono',monospace; text-shadow:0 0 6px rgba(0,255,255,.6)}
@keyframes scan{to{transform:translateY(120vh)}}

/* Accessibility - reduced motion */
@media (prefers-reduced-motion: reduce){
  .glitch::before,.glitch::after{animation:none}
  .hero .bg{opacity:.15}
  #boot .scanline{animation:none}
}