:root {
  --cyan:       #00c8ff;
  --cyan-dim:   #0077aa;
  --cyan-dark:  #002233;
  --green:      #00ff88;
  --green-dim:  #00aa55;
  --red:        #ff3355;
  --orange:     #ff8800;
  --bg:         #000810;
  --bg2:        #00060f;
  --border:     rgba(0,200,255,0.25);
  --border-hi:  rgba(0,200,255,0.6);
  --font-mono:  'Share Tech Mono','Courier New',monospace;
  --font-title: 'Orbitron',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{min-height:100vh;background:var(--bg);color:var(--cyan);font-family:var(--font-mono);overflow-x:hidden}
.crt-overlay{position:fixed;inset:0;z-index:0;pointer-events:none;background:radial-gradient(ellipse at center,transparent 60%,rgba(0,0,0,.7) 100%)}
.scanlines{position:fixed;inset:0;z-index:1;pointer-events:none;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,0,0,.08) 2px,rgba(0,0,0,.08) 4px)}
.grid-bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.grid-line-h{position:absolute;left:0;right:0;height:1px;background:rgba(0,200,255,.04)}
.grid-line-v{position:absolute;top:0;bottom:0;width:1px;background:rgba(0,200,255,.04)}
.particles{position:fixed;inset:0;z-index:0;pointer-events:none}
.terminal-wrap{position:relative;z-index:10;max-width:1000px;margin:30px auto;border:1.5px solid var(--border-hi);border-radius:3px;background:var(--bg2);box-shadow:0 0 40px rgba(0,200,255,.08),inset 0 0 80px rgba(0,0,0,.4)}
.term-header{display:flex;align-items:center;justify-content:space-between;background:rgba(0,200,255,.1);border-bottom:1px solid var(--border-hi);padding:8px 18px;font-size:10px;letter-spacing:2px}
.logo-text{font-family:var(--font-title);font-size:15px;font-weight:700;color:var(--cyan)}
.header-sep{color:var(--cyan-dim);margin:0 8px}
.os-ver{color:var(--cyan-dim)}
.term-header-center{display:flex;align-items:center;gap:10px;color:var(--cyan);font-size:10px;letter-spacing:3px}
.blink-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:blink 1s infinite}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}
.term-header-right{color:var(--cyan-dim);font-size:10px;letter-spacing:1px}
.session-id{font-size:9px}
.term-body{padding:22px 24px}
.title-block{text-align:center;margin-bottom:28px}
.title-deco{color:var(--cyan-dark);font-size:9px;letter-spacing:1px;overflow:hidden;white-space:nowrap}
.main-title{font-family:var(--font-title);font-size:clamp(18px,4vw,24px);font-weight:900;letter-spacing:6px;color:var(--cyan);margin:10px 0 6px;text-transform:uppercase}
.main-subtitle{font-size:15px;letter-spacing:5px;color:var(--cyan-dim);margin-bottom:15x}
.progress-track{display:flex;align-items:flex-start;justify-content:center;gap:0;margin-bottom:32px}
.prog-wrap{display:flex;flex-direction:column;align-items:center;gap:6px}
.prog-node{width:82px;height:52px;border:1.5px solid var(--cyan-dark);border-radius:3px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;transition:all .3s}
.prog-node.active{border-color:var(--cyan);background:rgba(0,200,255,.1);animation:node-pulse 2s infinite}
.prog-node.done{border-color:var(--green);background:rgba(0,255,136,.08)}
.prog-node.locked{border-color:var(--cyan-dark);opacity:.4}
@keyframes node-pulse{0%,100%{box-shadow:0 0 8px rgba(0,200,255,.3)}50%{box-shadow:0 0 20px rgba(0,200,255,.6)}}
.node-num{font-size:12px;letter-spacing:2px;color:var(--cyan-dim)}
.node-icon{font-size:14px;color:var(--cyan-dark)}
.prog-node.active .node-icon{color:var(--cyan)}
.prog-node.done .node-icon{color:var(--green)}
.node-label{font-size:12px;letter-spacing:2px;color:var(--cyan-dim);text-align:center}
.prog-connector{display:flex;align-items:center;gap:2px;padding:0 4px;margin-top:18px}
.connector-line{width:28px;height:1.5px;background:var(--cyan-dark)}
.prog-connector.done .connector-line{background:var(--green)}
.connector-arrow{font-size:9px;color:var(--cyan-dark)}
.prog-connector.done .connector-arrow{color:var(--green)}
.lock-alert{display:flex;align-items:center;gap:14px;border:1px solid var(--red);border-radius:2px;padding:12px 16px;margin-bottom:16px;background:rgba(255,51,85,.08)}
.lock-icon{font-size:20px;color:var(--red)}
.lock-text{font-size:10px;letter-spacing:1.5px;color:var(--red);line-height:1.8}
.lock-timer{color:var(--orange);font-size:11px}
.challenge-card{border:1px solid var(--border);border-radius:2px;margin-bottom:18px;overflow:hidden}
.card-header{display:flex;justify-content:space-between;align-items:center;background:rgba(0,200,255,.06);border-bottom:1px solid var(--border);padding:7px 16px}
.card-tag{font-size:9px;letter-spacing:3px;color:var(--cyan-dim)}
.card-tag-right{font-size:9px;letter-spacing:2px;color:var(--cyan);font-weight:bold}
.card-body{padding:18px 18px 14px}
.challenge-title{font-family:var(--font-title);font-size:13px;font-weight:700;color:#00ffff;letter-spacing:2px;margin-bottom:10px;text-transform:uppercase}
.challenge-desc{font-size:18px;line-height:1.9;color:var(--cyan-dim);margin-bottom:14px}
.challenge-desc strong{color:var(--cyan)}
.clue-block{background:rgba(0,0,0,.5);border-left:2px solid var(--cyan);padding:12px 14px;margin-bottom:14px;border-radius:0 2px 2px 0}
.clue-label{font-size:12px;letter-spacing:3px;color:var(--cyan-dim);margin-bottom:8px}
.clue-text{font-size:16px;color:var(--cyan);letter-spacing:2px}
.clue-sub{font-size:12px;color:var(--cyan-dim);margin-top:8px;letter-spacing:2px}
.binary-grid{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.bin-byte{background:rgba(0,200,255,.06);border:1px solid var(--border);border-radius:2px;padding:6px 10px;font-size:13px;color:var(--cyan);letter-spacing:2px;font-family:var(--font-mono)}
.conversion-table{margin-bottom:14px}
.conv-label{font-size:8px;letter-spacing:3px;color:var(--cyan-dim);margin-bottom:6px}
.conv-grid{display:flex;gap:6px;flex-wrap:wrap}
.conv-row{display:flex;flex-direction:column;align-items:center;background:rgba(0,200,255,.04);border:1px solid var(--cyan-dark);border-radius:2px;padding:4px 8px;font-size:10px}
.conv-row span:first-child{color:var(--cyan-dim);font-size:9px}
.conv-row span:last-child{color:var(--cyan);font-size:12px;font-weight:bold}
.conv-note{font-size:8px;color:var(--cyan-dark);margin-top:6px;letter-spacing:2px}
.rot-table{margin-bottom:14px}
.rot-label{font-size:8px;letter-spacing:3px;color:var(--cyan-dim);margin-bottom:6px}
.rot-row{display:flex;gap:5px;flex-wrap:nowrap;overflow-x:auto}
.rot-row span{min-width:22px;text-align:center;background:rgba(0,200,255,.04);border:1px solid var(--cyan-dark);border-radius:2px;padding:3px 0;font-size:11px;color:var(--cyan-dim)}
.rot-row.accent span{color:var(--cyan);border-color:rgba(0,200,255,.2)}
.rot-arrow{text-align:center;color:var(--cyan-dim);font-size:12px;padding:2px 0}
.rot-text{font-size:18px !important;letter-spacing:4px !important}
.fragment-grid{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.fragment{background:rgba(0,200,255,.06);border:1px solid var(--border);border-radius:2px;padding:10px 16px;text-align:center}
.frag-label{font-size:8px;letter-spacing:2px;color:var(--cyan-dim);margin-bottom:4px}
.frag-val{font-size:16px;color:var(--cyan);letter-spacing:3px}
.frag-plus{font-size:20px;color:var(--cyan-dim)}
.hint-toggle{margin-top:10px}
.hint-btn{background:transparent;border:1px dashed var(--cyan-dark);color:var(--cyan-dim);font-family:var(--font-mono);font-size:9px;letter-spacing:2px;padding:6px 14px;cursor:pointer;border-radius:2px;transition:all .2s}
.hint-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.hint-content{margin-top:8px}
.hint-text{font-size:10px;line-height:1.8;color:var(--orange);border:1px dashed rgba(255,136,0,.3);border-radius:2px;padding:8px 12px;background:rgba(255,136,0,.04);letter-spacing:1px}
.input-section{margin-bottom:18px}
.input-row{display:flex;gap:8px;align-items:center}
.input-prefix{color:var(--cyan);font-size:14px;flex-shrink:0}
.tron-input{flex:1;background:rgba(0,0,0,.6) !important;border:1px solid var(--cyan) !important;border-radius:2px !important;color:#00ffff !important;font-family:var(--font-mono) !important;font-size:13px !important;padding:10px 14px !important;letter-spacing:3px !important;outline:none !important;transition:box-shadow .2s}
.tron-input:focus{box-shadow:0 0 12px rgba(0,200,255,.3) !important}
.tron-input::placeholder{color:var(--cyan-dark) !important;letter-spacing:2px !important}
.tron-btn{background:transparent;border:1px solid var(--cyan);color:var(--cyan);font-family:var(--font-mono);font-size:15px;letter-spacing:3px;padding:10px 18px;cursor:pointer;border-radius:2px;display:flex;align-items:center;gap:8px;white-space:nowrap;transition:all .2s}
.tron-btn:hover{background:rgba(0,200,255,.15);box-shadow:0 0 12px rgba(0,200,255,.2)}
.tron-btn:active{transform:scale(.97)}
.feedback{margin-top:10px;font-size:10px;letter-spacing:1.5px;padding:8px 12px;border-radius:2px;display:flex;align-items:center;gap:8px}
.feedback.error{color:var(--red);border:1px solid rgba(255,51,85,.3);background:rgba(255,51,85,.05)}
.feedback.success{color:var(--green);border:1px solid rgba(0,255,136,.3);background:rgba(0,255,136,.05)}
.fb-icon{font-size:14px}
.attempt-count{color:var(--orange);margin-left:auto;font-size:9px}
.animate-in{animation:slide-in .3s ease}
@keyframes slide-in{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.sys-log{border:1px solid var(--cyan-dark);border-radius:2px;margin-bottom:18px;overflow:hidden}
.log-header{background:rgba(0,200,255,.04);border-bottom:1px solid var(--cyan-dark);padding:6px 14px;font-size:8px;letter-spacing:3px;color:var(--cyan-dim)}
.log-body{padding:10px 14px;max-height:110px;overflow-y:auto}
.log-line{font-size:12px;line-height:1.8;color:var(--cyan-dim)}
.log-line.ok{color:var(--green-dim)}
.log-line.err{color:var(--red)}
.term-footer{border-top:1px solid var(--cyan-dark);padding:8px 18px;font-size:9px;letter-spacing:2px;color:var(--cyan-dark);display:flex;align-items:center;gap:10px}
.footer-sep{color:var(--cyan-dark)}
.reset-link{color:var(--cyan-dark);text-decoration:none;margin-left:auto;transition:color .2s}
.reset-link:hover{color:var(--red)}
.victory-section{border:1.5px solid var(--green);border-radius:3px;padding:28px 24px;background:rgba(0,255,136,.04);margin-bottom:18px;animation:victory-glow 2s infinite}
@keyframes victory-glow{0%,100%{box-shadow:0 0 20px rgba(0,255,136,.15)}50%{box-shadow:0 0 40px rgba(0,255,136,.3)}}
.victory-header{text-align:center;margin-bottom:22px}
.victory-deco{color:rgba(0,255,136,.3);font-size:9px;letter-spacing:1px;overflow:hidden;white-space:nowrap}
.victory-icon{font-size:32px;color:var(--green);margin:10px 0}
.victory-title{font-family:var(--font-title);font-size:clamp(14px,3vw,20px);font-weight:900;color:var(--green);letter-spacing:5px;margin:8px 0 5px;text-transform:uppercase}
.victory-sub{font-size:9px;letter-spacing:4px;color:var(--green-dim);margin-bottom:8px}
.transmission-box{background:rgba(0,0,0,.5);border-left:2px solid var(--green);padding:14px 16px;margin-bottom:18px;border-radius:0 2px 2px 0}
.trans-label{font-size:8px;letter-spacing:3px;color:var(--green-dim);margin-bottom:8px}
.trans-text{font-size:11px;line-height:2;color:var(--green);font-style:italic}
.trans-sig{font-size:9px;color:var(--green-dim);margin-top:8px;letter-spacing:2px}
.flag-section{text-align:center;margin-bottom:22px}
.flag-label{font-size:9px;letter-spacing:3px;color:var(--green-dim);margin-bottom:8px}
.flag-value{display:inline-block;background:rgba(0,0,0,.7);border:1.5px solid var(--green);border-radius:2px;padding:10px 24px;font-size:16px;font-weight:bold;color:var(--green);letter-spacing:4px;margin-bottom:10px;font-family:var(--font-mono)}
.copy-btn{display:block;margin:8px auto 0;background:transparent;border:1px solid var(--green);color:var(--green);font-family:var(--font-mono);font-size:9px;letter-spacing:3px;padding:7px 20px;cursor:pointer;border-radius:2px;transition:all .2s}
.copy-btn:hover{background:rgba(0,255,136,.1)}
.copy-confirm{color:var(--green);font-size:9px;letter-spacing:3px;margin-top:6px}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px}
.stat-card{background:rgba(0,0,0,.4);border:1px solid rgba(0,255,136,.2);border-radius:2px;padding:12px 10px;text-align:center}
.stat-label{font-size:8px;letter-spacing:2px;color:var(--green-dim);margin-bottom:6px}
.stat-val{font-size:13px;color:var(--green);letter-spacing:2px}
.stat-val.ok{color:var(--green)}
.stat-val.err{color:var(--red)}
.restart-row{text-align:center}
.restart-btn{display:inline-block;background:transparent;border:1px solid var(--cyan);color:var(--cyan);font-family:var(--font-mono);font-size:10px;letter-spacing:3px;padding:9px 24px;cursor:pointer;border-radius:2px;text-decoration:none;transition:all .2s}
.restart-btn:hover{background:rgba(0,200,255,.1)}
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--cyan-dark)}
@media(max-width:600px){.terminal-wrap{margin:10px}.prog-node{width:40px;height:40px}.connector-line{width:16px}.term-header-center{display:none}.stats-grid{grid-template-columns:1fr}}