:root{
  --bg:#05060a;
  --bg2:#090b12;
  --panel:rgba(14,17,27,.82);
  --line:rgba(120,140,200,.16);
  --txt:#e8ecff;
  --dim:#9aa3c7;
  --cyan:#3ad2ff;
  --violet:#8a6bff;
  --amber:#ffab2e;
  --pink:#ff2e88;
  --lime:#8dff6b;
  --danger:#ff4d5e;
  --radius:14px;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --disp:"Chakra Petch",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--txt);font-family:var(--disp);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.5;
}
a{color:inherit;text-decoration:none}
canvas{display:block}

#bgCanvas{position:fixed;inset:0;width:100%;height:100%;z-index:0;opacity:.55;pointer-events:none}
.scanlines{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.022) 0 1px,transparent 1px 3px);
  mix-blend-mode:overlay;
}
main{position:relative;z-index:2}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:12px clamp(14px,3vw,34px);background:linear-gradient(180deg,rgba(5,6,10,.94),rgba(5,6,10,.55));
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.brand{font-weight:700;letter-spacing:.22em;font-size:18px}
.brand span{color:var(--pink);margin:0 3px}
.topnav{display:flex;align-items:center;gap:clamp(8px,1.6vw,22px);font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:var(--dim)}
.topnav a:hover{color:var(--cyan)}
.icon-btn{
  background:transparent;border:1px solid var(--line);color:var(--dim);width:30px;height:30px;border-radius:8px;
  cursor:pointer;font-size:14px;line-height:1;
}
.icon-btn:hover{color:var(--cyan);border-color:var(--cyan)}
.icon-btn.muted{color:#5a6182;text-decoration:line-through}

/* ---------- hero ---------- */
.hero{max-width:1080px;margin:0 auto;padding:clamp(46px,9vh,110px) clamp(16px,4vw,34px) clamp(30px,6vh,70px);text-align:center}
.kicker{font-family:var(--mono);font-size:11.5px;letter-spacing:.28em;color:var(--cyan);opacity:.85;margin:0 0 18px}
.title{margin:0;font-size:clamp(58px,13vw,168px);line-height:.86;font-weight:700;letter-spacing:-.02em}
.title .t1{display:block;color:#fff;text-shadow:0 0 18px rgba(58,210,255,.55),0 0 60px rgba(58,210,255,.25)}
.title .t2{display:block;color:transparent;-webkit-text-stroke:2px var(--pink);text-shadow:0 0 26px rgba(255,46,136,.55)}
.hook{margin:26px auto 0;font-size:clamp(18px,2.5vw,27px);line-height:1.35;max-width:780px;color:#cfd6ff}
.hook strong{color:var(--amber)}
.subhook{margin:16px auto 0;max-width:680px;color:var(--dim);font-size:15.5px}
.subhook em{color:var(--cyan);font-style:normal}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:30px 0 0}
.hero-stats{display:flex;gap:clamp(18px,5vw,64px);justify-content:center;flex-wrap:wrap;margin-top:46px}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:clamp(22px,3.2vw,34px);color:#fff}
.hero-stats span{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--dim);text-transform:uppercase}

/* ---------- buttons ---------- */
.btn{
  font-family:var(--disp);font-weight:600;font-size:14px;letter-spacing:.06em;cursor:pointer;
  border-radius:10px;padding:12px 20px;border:1px solid transparent;transition:.16s transform,.16s box-shadow,.16s background;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{background:linear-gradient(180deg,#ff3d94,#d81f6e);color:#fff;box-shadow:0 0 0 1px rgba(255,46,136,.4),0 10px 34px -10px rgba(255,46,136,.75)}
.btn-primary:hover{box-shadow:0 0 0 1px rgba(255,46,136,.7),0 14px 40px -8px rgba(255,46,136,.9)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--txt)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn.big{padding:15px 30px;font-size:16px}

/* ---------- section heads ---------- */
.section-head{max-width:1180px;margin:0 auto 20px;padding:0 clamp(16px,4vw,34px)}
.section-head h2{margin:0;font-size:clamp(22px,3.4vw,40px);letter-spacing:.02em}
.section-head p{margin:6px 0 0;color:var(--dim);font-family:var(--mono);font-size:12.5px}

/* ---------- arena ---------- */
.arena-section{padding:clamp(34px,6vh,70px) 0 10px}
.play-grid{
  max-width:1180px;margin:0 auto;padding:0 clamp(16px,4vw,34px);
  display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:22px;
}
.stage{min-width:0}
.hud{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:var(--panel);border:1px solid var(--line);border-radius:12px 12px 0 0;padding:10px 14px;
  font-family:var(--mono);
}
.hud-group{display:flex;align-items:center;gap:10px;min-width:0}
.hud-group.center{flex-direction:column;gap:3px}
.hud-group.right{flex-direction:column;align-items:flex-end;gap:3px}
.hud-label{font-size:10px;letter-spacing:.18em;color:var(--dim)}
.hud-val{font-size:15px;color:var(--cyan)}
.pips{display:flex;gap:5px}
.pip{width:16px;height:7px;border-radius:2px;background:linear-gradient(180deg,#ffd35a,#ff9f1c);box-shadow:0 0 8px rgba(255,171,46,.55)}
.pip.spent{background:rgba(255,255,255,.09);box-shadow:none}
.hp .pip{width:18px;height:9px;background:linear-gradient(180deg,#ff5f7a,#d81f37);box-shadow:0 0 9px rgba(255,77,94,.6)}
.hp .pip.spent{background:rgba(255,255,255,.08);box-shadow:none}

.field{position:relative;border:1px solid var(--line);border-top:none;border-radius:0 0 12px 12px;overflow:hidden;background:#03040a}
#arenaCanvas{width:100%;height:min(62vh,560px);min-height:340px;touch-action:none;cursor:crosshair;display:block}
.status-line{
  position:absolute;left:0;right:0;bottom:0;padding:7px 12px;font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;
  color:var(--dim);background:linear-gradient(0deg,rgba(3,4,10,.92),transparent);pointer-events:none;
}
.status-line.hot{color:var(--pink)}

/* overlays */
.overlay{position:absolute;inset:0;display:none;place-items:center;background:radial-gradient(80% 80% at 50% 30%,rgba(5,6,10,.72),rgba(3,4,10,.96));padding:20px;z-index:5}
.overlay.show{display:grid}
.overlay-card{
  max-width:520px;width:100%;text-align:center;background:linear-gradient(180deg,rgba(18,21,34,.96),rgba(10,12,20,.96));
  border:1px solid rgba(255,46,136,.35);border-radius:18px;padding:26px 24px;box-shadow:0 30px 90px -30px rgba(255,46,136,.5);
}
.fly-mark{font-size:44px;filter:drop-shadow(0 0 16px rgba(58,210,255,.6))}
.overlay-card h3{margin:8px 0 6px;font-size:26px;letter-spacing:.04em}
.accent{color:var(--pink)}
.overlay-hook{color:#cfd6ff;font-size:15px;margin:8px 0 14px}
.overlay-list{list-style:none;padding:0;margin:0 0 18px;font-family:var(--mono);font-size:12.5px;color:var(--dim);text-align:left;display:inline-block}
.overlay-list li{margin:5px 0}
.overlay-list b{color:var(--amber)}
.tiny{font-family:var(--mono);font-size:10.5px;color:#68709a;margin:12px 0 0;letter-spacing:.04em}
.result{border-color:rgba(58,210,255,.4);box-shadow:0 30px 90px -30px rgba(58,210,255,.45)}
.grade{font-size:64px;font-weight:700;line-height:1;color:var(--amber);text-shadow:0 0 26px rgba(255,171,46,.6)}
.end-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px;font-family:var(--mono);font-size:12px;color:var(--dim);margin:16px 0 18px;text-align:left}
.end-stats b{color:var(--txt);float:right}
.share-row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:10px}

.below-hud{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;padding:14px 4px 0}
.meter-top{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--dim);margin-bottom:5px}
.meter{height:8px;border-radius:5px;background:rgba(255,255,255,.07);overflow:hidden}
.meter-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--lime),var(--amber),var(--danger));transition:width .18s}
.meter-note{font-family:var(--mono);font-size:10.5px;color:#68709a;margin:7px 0 0;max-width:520px}
.legend{display:flex;flex-direction:column;gap:4px;font-family:var(--mono);font-size:11px;color:var(--dim);justify-self:end}
.legend i{display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:6px}

/* ---------- neural panel ---------- */
.neural-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;
  display:flex;flex-direction:column;min-width:0;align-self:start;
}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.panel-head h3{margin:0;font-size:14px;letter-spacing:.14em}
.dot-live{font-family:var(--mono);font-size:10.5px;color:var(--lime);letter-spacing:.1em}
.dot-live.paused{color:var(--dim)}
.net-canvas{width:100%;height:220px;background:radial-gradient(70% 70% at 50% 40%,rgba(30,40,80,.35),rgba(3,4,10,.6));border:1px solid var(--line);border-radius:10px}
.readouts{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin:10px 0}
.ro{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:8px;padding:7px 8px;display:flex;flex-direction:column;gap:3px}
.ro span{font-family:var(--mono);font-size:9px;letter-spacing:.08em;color:var(--dim)}
.ro b{font-family:var(--mono);font-size:13px;color:var(--cyan)}
.gf-idle{color:var(--violet)!important}
.gf-fire{color:var(--pink)!important;text-shadow:0 0 12px rgba(255,46,136,.9)}
.raster-wrap{margin-top:2px}
.raster-label{font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;color:var(--dim);margin-bottom:5px}
.raster-canvas{width:100%;height:150px;background:#03040a;border:1px solid var(--line);border-radius:10px}
.disclaimer{font-family:var(--mono);font-size:10px;color:#68709a;line-height:1.5;margin:11px 0 0}
.disclaimer b{color:var(--amber)}

/* ---------- science ---------- */
.science{padding:clamp(50px,9vh,110px) 0 20px}
.sci-grid{max-width:1180px;margin:0 auto;padding:0 clamp(16px,4vw,34px);display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.sci-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.sci-card h3{margin:0 0 10px;font-size:17px;letter-spacing:.02em}
.sci-card p{color:var(--dim);font-size:14px;margin:0 0 10px}
.sci-card p:last-child{margin-bottom:0}
.sci-card b{color:var(--txt)}
.callout{max-width:1180px;margin:18px auto 0;padding:0 clamp(16px,4vw,34px)}
.callout p{background:rgba(255,171,46,.07);border:1px solid rgba(255,171,46,.3);border-radius:12px;padding:14px 18px;color:#d8d2b8;font-size:13.5px;margin:0}
.callout b{color:var(--amber)}

/* ---------- sources ---------- */
.sources{padding:clamp(40px,7vh,80px) 0 20px}
.src-grid{max-width:1180px;margin:0 auto;padding:0 clamp(16px,4vw,34px);display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.src{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:15px 17px;transition:.16s border-color,.16s transform;display:flex;flex-direction:column;gap:3px}
.src:hover{border-color:var(--cyan);transform:translateY(-2px)}
.src b{font-size:14.5px}
.src span{font-family:var(--mono);font-size:11px;color:var(--dim)}

/* ---------- footer ---------- */
.footer{max-width:1180px;margin:0 auto;padding:50px clamp(16px,4vw,34px) 60px;border-top:1px solid var(--line);margin-top:50px;color:var(--dim);font-size:12.5px}
.footer b{color:var(--txt)}

/* ---------- responsive ---------- */
@media (max-width:940px){
  .play-grid{grid-template-columns:1fr}
  .neural-panel{order:2}
  #arenaCanvas{height:min(58vh,480px)}
}
@media (max-width:560px){
  .topnav a{display:none}
  .end-stats{font-size:11px}
  .below-hud{grid-template-columns:1fr}
  .legend{flex-direction:row;flex-wrap:wrap;justify-self:start}
  .hud{font-size:11px}
  .pip{width:12px}
  #arenaCanvas{min-height:300px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}