@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&family=Space+Mono:wght@400;700&display=swap');
:root{--bg:#020504;--green:#45ff3b;--white:#eee9df;--muted:#9ca49d;--line:rgba(69,255,59,.28)}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg)}body{margin:0;background:transparent;color:var(--white);font-family:Inter,Arial,sans-serif;overflow-x:hidden}
#matrixRain{position:fixed;inset:0;width:100%;height:100%;z-index:0;background:#010302;pointer-events:none}.vignette{position:fixed;inset:0;z-index:1;background:radial-gradient(circle at 50% 40%,transparent 25%,rgba(0,0,0,.78) 100%);pointer-events:none}.scanlines{position:fixed;inset:0;z-index:2;pointer-events:none;background:repeating-linear-gradient(0deg,rgba(255,255,255,.025) 0 1px,transparent 1px 5px)}main,footer{position:relative;z-index:3}
.topbar{position:fixed;z-index:10;top:0;left:0;right:0;padding:18px 5vw;display:flex;justify-content:space-between;align-items:center;background:linear-gradient(rgba(1,5,3,.9),transparent);backdrop-filter:blur(6px)}
.brand{color:var(--green);text-decoration:none;font:700 16px "Space Mono"}.topbar nav{display:flex;gap:25px}.topbar nav a{color:var(--white);text-decoration:none;font:700 11px "Space Mono"}.topbar nav a:hover{color:var(--green)}
.terminal-btn,.btn{border:1px solid var(--green);background:rgba(5,35,9,.35);color:var(--green);padding:12px 17px;font:700 11px "Space Mono";cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-height:42px}.terminal-btn:hover,.btn:hover{background:var(--green);color:#001000;box-shadow:0 0 28px rgba(69,255,59,.28)}
.section{width:min(1180px,90vw);margin:auto;padding:125px 0}.hero{min-height:100vh;display:grid;grid-template-columns:1.15fr .85fr;gap:6vw;align-items:center;padding-top:145px}
.eyebrow{font:700 11px "Space Mono";color:var(--green);letter-spacing:.18em;margin-bottom:20px}h1{font-size:clamp(50px,8vw,110px);line-height:.87;letter-spacing:-.06em;margin:0;font-weight:800}h1 span{color:var(--green);text-shadow:0 0 30px rgba(69,255,59,.3)}
h2{font-size:clamp(40px,6vw,78px);line-height:.95;letter-spacing:-.055em;margin:0 0 28px}.lead{max-width:650px;color:#c5c7c1;line-height:1.7;margin:28px 0}.actions{display:flex;gap:12px;flex-wrap:wrap}.ghost{background:transparent}
.terminal,.memory-box,.secret{border:1px solid var(--line);background:rgba(3,13,7,.72);box-shadow:0 0 55px rgba(0,255,40,.05);backdrop-filter:blur(9px)}.terminal{padding:20px;min-height:290px}.terminal-head{display:flex;justify-content:space-between;color:var(--green);font:700 10px "Space Mono";letter-spacing:.08em;border-bottom:1px solid var(--line);padding-bottom:12px}.blink{animation:blink 1s infinite}@keyframes blink{50%{opacity:.1}}#terminalText{font:12px/1.8 "Space Mono";color:#8eff83;white-space:pre-wrap}
.split{display:grid;grid-template-columns:1fr 1fr;gap:7vw;border-top:1px solid var(--line)}.copy{font-size:18px;line-height:1.75;color:#c6c7c1}.center{text-align:center}.theory-grid{display:grid;grid-template-columns:1fr 1fr;gap:35px;margin-top:45px}.evidence{border-top:1px solid var(--line)}.evidence div{display:grid;grid-template-columns:130px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid rgba(69,255,59,.13)}.evidence b{font:700 12px "Space Mono";color:var(--green)}.evidence span{color:var(--muted)}
.countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:28px 0}.countdown div{border:1px solid rgba(69,255,59,.18);padding:15px 5px;text-align:center}.countdown strong{display:block;font:700 27px "Space Mono";color:var(--green)}.countdown small{font:9px "Space Mono";color:var(--muted)}.status-lines{font:11px/2 "Space Mono";color:#adb4ad}.status-lines span{color:var(--green)}.status-lines em{color:#ff9a55;font-style:normal}
.puzzle{min-height:100vh}.memory-box{padding:32px;text-align:center;margin-top:30px}.sequence{min-height:45px;color:var(--green);font:700 20px "Space Mono";letter-spacing:.18em}.memory-grid{display:grid;grid-template-columns:repeat(4,1fr);max-width:440px;margin:20px auto;gap:8px}.memory-grid button{aspect-ratio:1;border:1px solid var(--line);background:rgba(0,30,5,.55);color:var(--green);font:700 17px "Space Mono";cursor:pointer}.memory-grid button:hover,.memory-grid button.flash{background:var(--green);color:#001000}.puzzle-status{min-height:24px;margin:16px;color:#9da79f;font:11px "Space Mono"}
.secret{margin-top:35px;padding:40px;text-align:center}.hidden{display:none!important}.answer-row{display:flex;max-width:600px;margin:auto}.answer-row input{flex:1;background:#010402;border:1px solid var(--line);color:white;padding:13px;font:700 12px "Space Mono";outline:none}.observer-code{margin:30px 0;color:var(--green);font:700 19px "Space Mono";letter-spacing:.14em}.reveal{margin-top:22px;color:var(--green);font:700 15px "Space Mono"}
.share{border-top:1px solid var(--line);text-align:center}.center-actions{justify-content:center}.share-status{min-height:22px;color:var(--green);font:11px "Space Mono";margin-top:20px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
footer{width:min(1180px,90vw);margin:auto;padding:45px 0 75px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:#69756c;font:9px "Space Mono"}
@media(max-width:800px){.topbar nav{display:none}.terminal-btn{padding:10px 12px}.hero,.split,.theory-grid{grid-template-columns:1fr}.hero{padding-top:135px}.memory-grid{max-width:330px}.answer-row{flex-direction:column;gap:8px}.countdown strong{font-size:20px}footer{flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.blink{animation:none}}

/* V5.1 fixes */
.menu-btn{display:none;border:1px solid var(--green);background:rgba(5,35,9,.35);color:var(--green);padding:10px 12px;font:700 10px "Space Mono";cursor:pointer}
.menu-btn:hover{background:var(--green);color:#001000}
@media(max-width:800px){
  .topbar{gap:10px}
  .menu-btn{display:block}
  .topbar nav{
    display:none;
    position:absolute;
    top:68px;left:5vw;right:5vw;
    padding:14px;
    flex-direction:column;
    gap:0;
    background:rgba(1,8,4,.96);
    border:1px solid var(--line);
    box-shadow:0 15px 45px rgba(0,0,0,.45);
  }
  .topbar nav.open{display:flex}
  .topbar nav a{padding:14px 8px;border-bottom:1px solid rgba(69,255,59,.12)}
  .topbar nav a:last-child{border-bottom:0}
}
@media(max-width:360px){
  .topbar{padding:12px 4vw;flex-wrap:wrap;justify-content:flex-start}
  .brand{margin-right:auto}
  .terminal-btn{width:100%;order:3}
  .topbar nav{top:102px;left:4vw;right:4vw}
}