:root{--bg:#0b0e1a;--bg2:#11152a;--panel:#151a33;--line:#2a3160;--cyan:#22d3ee;--magenta:#f471b5;--gold:#ffd23f;--green:#4ade80;--red:#f87171;--orange:#fb923c;--text:#e8ecff;--dim:#9aa3c7;--font-pixel:"Press Start 2P",monospace;--font-body:"Space Grotesk",system-ui,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background:radial-gradient(1200px 600px at 20% -10%,#1b2350 0,transparent 60%),radial-gradient(1000px 500px at 90% 10%,#3a1445 0,transparent 55%),var(--bg);color:var(--text);min-height:100vh;background-attachment:fixed}body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;background-image:linear-gradient(#ffffff06 1px,transparent 0),linear-gradient(90deg,#ffffff06 1px,transparent 0);background-size:44px 44px;-webkit-mask-image:radial-gradient(ellipse at 50% 0,black 30%,transparent 75%);mask-image:radial-gradient(ellipse at 50% 0,black 30%,transparent 75%)}#app{position:relative;z-index:1;max-width:960px;margin:0 auto;padding:0 16px 80px}.hud{position:-webkit-sticky;position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:14px;background:rgba(11,14,26,.92);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:3px solid var(--line);padding:10px 16px;margin:0 -16px 24px}.hud .avatar{width:46px;height:46px;border-radius:10px;background:linear-gradient(135deg,var(--cyan),var(--magenta));display:grid;place-items:center;font-size:26px;border:3px solid #0b0e1a;box-shadow:0 0 0 2px var(--gold)}.hud .who{line-height:1.25}.hud .who .lvl{font-family:var(--font-pixel);font-size:9px;color:var(--gold)}.hud .who .rank{font-size:12px;color:var(--dim)}.xpwrap{flex:1 1;min-width:120px}.xpbar{height:14px;background:#05070f;border:2px solid var(--line);border-radius:8px;overflow:hidden}.xpbar>div{height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--green));transition:width .8s cubic-bezier(.2,.9,.2,1);box-shadow:0 0 12px #22d3ee88}.xplabel{font-size:11px;color:var(--dim);margin-top:3px;font-size:8px}.hud .streak,.xplabel{font-family:var(--font-pixel)}.hud .streak{font-size:10px;color:#fb923c;white-space:nowrap}.iconbtn{background:var(--panel);border:2px solid var(--line);color:var(--text);border-radius:8px;padding:8px 10px;cursor:pointer;font-size:16px}.iconbtn:hover{border-color:var(--cyan)}h1.logo{font-family:var(--font-pixel);font-size:clamp(22px,5vw,42px);margin:34px 0 8px;background:linear-gradient(90deg,var(--cyan),var(--magenta),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 18px #22d3ee55)}.tagline,h1.logo{text-align:center}.tagline{color:var(--dim);margin-bottom:6px}.press-start{text-align:center;font-family:var(--font-pixel);font-size:11px;color:var(--gold);margin:26px 0 18px;animation:blink 1.4s steps(2) infinite}@keyframes blink{50%{opacity:.15}}.btn{font-family:var(--font-pixel);font-size:11px;background:linear-gradient(180deg,#2b3a8f,#1b2350);color:var(--text);border:3px solid var(--cyan);border-radius:10px;padding:14px 18px;cursor:pointer;text-decoration:none;display:inline-block;box-shadow:0 4px 0 #0a0d1d,0 0 16px #22d3ee33;transition:transform .08s}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 0 #0a0d1d,0 0 22px #22d3ee66}.btn:active{transform:translateY(2px);box-shadow:0 1px 0 #0a0d1d}.btn.gold{border-color:var(--gold);box-shadow:0 4px 0 #0a0d1d,0 0 16px #ffd23f44}.btn.ghost{border-color:var(--line);background:var(--panel);box-shadow:none}.btn:disabled{opacity:.45;cursor:default;transform:none}.worlds{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:20px;gap:20px;margin-top:8px}.world{position:relative;border-radius:16px;padding:26px 22px;overflow:hidden;background:var(--panel);border:3px solid var(--line);cursor:pointer;transition:transform .15s,border-color 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a{color:var(--cyan);text-decoration:none;font-size:14px}.course-head{display:flex;align-items:center;gap:16px;margin-bottom:6px}.course-head .cic{font-size:44px}.course-head h2{font-family:var(--font-pixel);font-size:17px;line-height:1.7}.course-head.jarkom h2{color:var(--cyan)}.course-head.ib h2{color:var(--magenta)}.course-head.pemweb h2{color:var(--orange)}.stage{background:var(--panel);border:2px solid var(--line);border-radius:14px;padding:18px;margin:14px 0;display:flex;gap:16px;align-items:center;flex-wrap:wrap}.stage .num{font-family:var(--font-pixel);font-size:13px;width:46px;height:46px;flex:none;display:grid;place-items:center;border-radius:12px;background:#05070f;border:2px solid var(--cyan);color:var(--cyan)}.stage.ib .num{border-color:var(--magenta);color:var(--magenta)}.stage.pemweb .num{border-color:var(--orange);color:var(--orange)}.stage .sinfo{flex:1 1;min-width:200px}.stage .sinfo h3{font-size:17px;margin-bottom:4px}.stage 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code{background:#05070f;padding:2px 7px;border-radius:6px;color:var(--green);font-size:13px}.reader-nav{display:flex;justify-content:space-between;gap:12px;margin-top:22px;flex-wrap:wrap}.arena{text-align:center}.fighters{display:flex;justify-content:space-between;align-items:flex-end;gap:10px;margin:10px 0 20px}.fighter{flex:1 1}.fighter .fname{font-family:var(--font-pixel);font-size:9px;margin-bottom:6px}.fighter .fhp{height:16px;background:#05070f;border:2px solid var(--line);border-radius:9px;overflow:hidden}.fighter .fhp>div{height:100%;transition:width .5s}.fighter.you .fhp>div{background:linear-gradient(90deg,var(--green),var(--cyan))}.fighter.boss .fhp>div{background:linear-gradient(90deg,var(--red),#fb923c)}.fighter .femoji{font-size:52px;margin-bottom:4px}.fighter .femoji.hit{animation:shake .4s}@keyframes shake{25%{transform:translateX(-8px) rotate(-6deg)}75%{transform:translateX(8px) rotate(6deg)}}.vs{font-family:var(--font-pixel);color:var(--red);font-size:14px;padding-bottom:26px;animation:blink 1.2s steps(2) infinite}.qcard{background:var(--panel);border:3px solid var(--line);border-radius:14px;padding:24px 20px;text-align:left}.qcard .qnum{font-family:var(--font-pixel);font-size:9px;color:var(--dim);margin-bottom:10px}.qcard .qtext{font-size:18px;line-height:1.6;margin-bottom:18px}.opt{display:block;width:100%;text-align:left;margin:9px 0;background:#0e1330;border:2px solid var(--line);color:var(--text);border-radius:10px;padding:13px 15px;font-size:15px;cursor:pointer;font-family:var(--font-body);transition:border-color .12s,background .12s}.opt:hover:not(:disabled){border-color:var(--cyan);background:#141b3d}.opt:disabled{cursor:default;opacity:.85}.opt.correct{border-color:var(--green);background:#0f2c1c;box-shadow:0 0 14px #4ade8044}.opt.wrong{border-color:var(--red);background:#2c1215;box-shadow:0 0 14px #f8717144}.opt .k{font-family:var(--font-pixel);font-size:10px;color:var(--gold);margin-right:10px}.explain{margin-top:14px;background:#0a0f24;border-left:4px solid var(--gold);padding:12px 14px;border-radius:0 10px 10px 0;font-size:14px;line-height:1.65;color:#dbe1ff;animation:slideup .3s ease}@keyframes slideup{0%{opacity:0;transform:translateY(8px)}}.dmg{position:absolute;font-family:var(--font-pixel);font-size:16px;color:var(--gold);animation:dmgfloat 1s ease forwards;pointer-events:none}@keyframes dmgfloat{to{transform:translateY(-46px);opacity:0}}.result{text-align:center;padding:20px 0}.result .big{font-size:64px;margin-bottom:8px}.result h2{font-family:var(--font-pixel);font-size:18px;margin-bottom:10px}.result h2.win{color:var(--gold);text-shadow:0 0 20px #ffd23f88}.result h2.lose{color:var(--red)}.result .stars{font-size:34px;letter-spacing:6px;margin:10px 0}.xp-gain{font-family:var(--font-pixel);font-size:11px;color:var(--green);margin:12px 0;line-height:2}.result .rbtns{display:flex;gap:12px;justify-content:center;margin-top:18px;flex-wrap:wrap}.empty{text-align:center;color:var(--dim);padding:60px 20px}.empty .big{font-size:54px;margin-bottom:12px}footer{text-align:center;color:var(--dim);font-size:12px;margin-top:50px}footer .pixel{font-family:var(--font-pixel);font-size:8px;color:#3a4066}@media (max-width:560px){.hud .who .rank{display:none}.fighter .femoji{font-size:40px}.stage .sbtns{width:100%}.stage .sbtns .btn{flex:1 1;text-align:center}}.topnav{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:14px 0 6px}.topnav a{color:var(--dim);text-decoration:none;font-size:14px;border:2px solid var(--line);border-radius:8px;padding:7px 12px;background:var(--bg2)}.topnav a:hover{color:var(--text);border-color:var(--cyan)}.topnav .spacer{flex:1 1}.topnav button.linkbtn{background:none;border:2px solid var(--line);border-radius:8px;color:var(--dim);padding:7px 12px;cursor:pointer;font-size:14px;font-family:var(--font-body)}.topnav button.linkbtn:hover{color:var(--red);border-color:var(--red)}.authcard{max-width:420px;margin:6vh auto 0;background:var(--panel);border:3px solid var(--line);border-radius:14px;padding:28px 26px}.authcard h1{font-family:var(--font-pixel);font-size:17px;color:var(--gold);line-height:1.7;margin-bottom:6px}.authcard p.sub{color:var(--dim);font-size:14px;margin-bottom:20px}.field{margin-bottom:16px}.field label{display:block;font-size:13px;color:var(--dim);margin-bottom:6px}.field input{width:100%;background:#05070f;border:2px solid var(--line);border-radius:10px;color:var(--text);padding:12px 14px;font-size:15px;font-family:var(--font-body)}.field input:focus{outline:none;border-color:var(--cyan)}.authcard .btn{width:100%;text-align:center}.formerr{background:#f8717122;border:2px solid var(--red);color:#fecaca;border-radius:10px;padding:10px 14px;font-size:14px;margin-bottom:16px}.authalt{text-align:center;margin-top:18px;color:var(--dim);font-size:14px}.authalt a{color:var(--cyan)}table.lb{width:100%;border-collapse:collapse;background:var(--panel);border:3px solid var(--line);border-radius:14px;overflow:hidden}table.lb td,table.lb th{padding:12px 14px;text-align:left;font-size:15px}table.lb thead th{font-family:var(--font-pixel);font-size:9px;color:var(--gold);background:var(--bg2);border-bottom:3px solid var(--line)}table.lb tbody tr{border-bottom:1px solid var(--line)}table.lb tbody tr:last-child{border-bottom:none}table.lb tr.me{background:#22d3ee14}table.lb .rk{font-family:var(--font-pixel);font-size:11px;color:var(--cyan)}.lbwrap{max-width:680px;margin:0 auto}.lbnote{color:var(--dim);font-size:13px;text-align:center;margin-top:12px}.pager{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:22px;flex-wrap:wrap}.pager .pinfo{font-family:var(--font-pixel);font-size:9px;color:var(--dim)}.pbar.thin{height:10px;margin-top:14px}.stage-actions{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.locknote{color:var(--dim);font-size:14px;margin-top:8px}.locknote a{color:var(--cyan)}.donecheck{color:var(--green);font-size:14px}.sectbody img{max-width:100%}.sectbody table{border-collapse:collapse;margin:12px 0}.sectbody td,.sectbody th{border:1px solid var(--line);padding:6px 10px}.sectbody code,.sectbody pre{font-size:13px}.sectbody pre{overflow-x:auto;background:#05070f;padding:12px;border-radius:10px}.srcbtn{display:inline-flex;gap:8px;align-items:center}.arena{background:radial-gradient(240px 120px at 12% -10px,#fb923c33,transparent 70%),radial-gradient(240px 120px at 88% -10px,#fb923c33,transparent 70%),var(--panel)}.fstage{position:relative;display:flex;flex-direction:column;align-items:center;padding-top:34px}.fighter .femoji{font-size:64px;line-height:1.15}.guardian .femoji{font-size:60px;line-height:1.15}.fshadow{width:74px;height:14px;border-radius:50%;background:radial-gradient(ellipse at center,#000a 0,transparent 70%);margin-top:2px}.bubble{position:absolute;top:-6px;left:0;right:0;margin-inline:auto;width:max-content;max-width:260px;text-align:center;background:#f4f6ff;color:#141830;font-size:13px;font-weight:600;padding:7px 11px;border-radius:10px;border:2px solid #141830;z-index:5;box-shadow:3px 3px 0 #0006}.bubble:after{content:"";position:absolute;left:50%;bottom:-7px;transform:translateX(-50%);border:7px solid transparent;border-top-color:#f4f6ff;border-bottom:0}.floaters{position:absolute;top:26px;left:0;right:0;height:0;display:flex;justify-content:center;z-index:6;pointer-events:none}.floater{position:absolute;font-family:var(--font-pixel);font-size:13px;text-shadow:2px 2px 0 #000}.floater.dmg{color:var(--red)}.floater.good{color:var(--green)}.floater.bad{color:var(--red)}.fighter.enraged .femoji{filter:drop-shadow(0 0 14px #f87171cc);animation:enragePulse .7s ease-in-out infinite}@keyframes enragePulse{0%,to{transform:scale(1)}50%{transform:scale(1.07)}}.guardian{text-align:center;padding-top:6px}