/* QuizQuest Coding Lab */
:root{--bg:#0e1424;--panel:#161f36;--panel2:#1d2843;--line:#2a3860;--ink:#eef2ff;--mute:#a3afd6;--go:#00b06f;--go2:#008a57;--blue:#0a84ff;--gold:#ffc83d;--red:#ff4d4d;
  --code-bg:#1b1f2b;--t-k:#f86d7c;--t-s:#adf195;--t-n:#ffc600;--t-c:#7f8ba3;--t-b:#84d6f7;--t-l:#ff9d5c;--t-m:#fdfbac;--t-p:#e5e9f0}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink)}
body{font-family:Nunito,system-ui,sans-serif;font-weight:700;font-size:16px;line-height:1.5}
h1,h2,h3{font-family:Fredoka,Nunito,sans-serif;font-weight:700;margin:0}
a{color:#8ec5ff}
button{font:inherit;cursor:pointer}
.hide{display:none!important}
.small{font-size:14px;color:var(--mute)}
code{font-family:ui-monospace,Menlo,Consolas,monospace;background:#0b1020;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:.92em;color:#fdfbac}
pre.code,.fillcode{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14.5px;line-height:1.55;background:var(--code-bg);border:1px solid #2b3245;border-radius:12px;padding:12px 14px;overflow-x:auto;margin:10px 0;white-space:pre;color:#e5e9f0;font-weight:500}
i.t-k{color:var(--t-k);font-style:normal;font-weight:700}i.t-s{color:var(--t-s);font-style:normal}i.t-n{color:var(--t-n);font-style:normal}i.t-c{color:var(--t-c);font-style:italic}
i.t-b{color:var(--t-b);font-style:normal}i.t-l{color:var(--t-l);font-style:normal}i.t-m{color:var(--t-m);font-style:normal}i.t-p{color:var(--t-p);font-style:normal}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;border-radius:12px;padding:11px 18px;font-weight:900;font-size:16px;color:#fff;background:var(--blue);box-shadow:0 4px 0 #0060c0;text-decoration:none}
.btn:active{transform:translateY(2px);box-shadow:0 2px 0 #0060c0}
.btn.go{background:var(--go);box-shadow:0 4px 0 var(--go2)}
.btn.run{background:var(--go);box-shadow:0 4px 0 var(--go2)}
.btn.ghost{background:transparent;border:2px solid var(--line);box-shadow:none;color:var(--ink)}
.btn.ghost:hover{border-color:#4a5c92}
.btn:disabled{opacity:.45;cursor:default}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.row.c{justify-content:center}
.toast{position:fixed;left:50%;top:70px;transform:translateX(-50%);z-index:90;background:#1f2a4a;border:2px solid var(--gold);border-radius:16px;padding:12px 20px;box-shadow:0 10px 30px rgba(0,0,0,.4);text-align:center;animation:tin .35s;max-width:92vw}
.toast b{display:block;font-family:Fredoka;font-size:20px;color:var(--gold)}
.toast span{font-size:15px}
.toast.go{opacity:0;transition:opacity .4s}
@keyframes tin{from{transform:translate(-50%,-20px);opacity:0}}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:95;overflow:hidden}
.confetti i{position:absolute;top:-20px;width:10px;height:16px;border-radius:2px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg)}}

/* ------------------------------------------------------------------ home */
.home{max-width:980px;margin:0 auto;padding:16px 16px 50px}
.hero{position:relative;overflow:hidden;border-radius:24px;padding:26px 24px;background:linear-gradient(135deg,#1e3a8a 0%,#7c3aed 55%,#db2777 100%);margin-bottom:18px}
.hero h1{font-size:34px;line-height:1.1}
.hero p{margin:8px 0 16px;max-width:560px;color:#e7e9ff}
.hero .blocks{position:absolute;right:-10px;top:-10px;width:230px;height:200px;opacity:.9;pointer-events:none}
.hero .blocks i{position:absolute;border-radius:6px;box-shadow:inset -6px -6px 0 rgba(0,0,0,.18)}
.hero .tag{display:inline-block;background:rgba(0,0,0,.25);border-radius:999px;padding:4px 12px;font-size:13px;margin-bottom:10px;letter-spacing:.05em}
.me{display:flex;flex-wrap:wrap;gap:16px;align-items:center;background:var(--panel);border:2px solid var(--line);border-radius:20px;padding:16px;margin-bottom:22px}
.me-av{width:74px;height:74px;border-radius:18px;background:#8ecdf7;display:grid;place-items:center;flex:none}
.noob{position:relative;width:34px;height:56px}
.noob i{position:absolute;left:50%;transform:translateX(-50%);display:block}
.noob .h{top:0;width:18px;height:14px;background:#f5cd30;border-radius:6px}
.noob .t{top:15px;width:34px;height:20px;background:#0d69ac;border-radius:3px;box-shadow:-10px 0 0 -3px #f5cd30,10px 0 0 -3px #f5cd30}
.noob .l{top:36px;width:22px;height:20px;background:#4b974b;border-radius:2px}
.me-tx{flex:1;min-width:220px}
.me-tx .nm{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--mute)}
.me-tx input{background:#0b1020;border:2px solid var(--line);border-radius:10px;color:#fff;font:inherit;font-size:17px;padding:4px 10px;width:170px}
.me-tx .lvl{font-family:Fredoka;font-size:22px;margin:4px 0}
.xpbar{display:block;height:10px;border-radius:99px;background:#0b1020;overflow:hidden;width:140px}
.xpbar.big{width:100%;height:14px}
.xpbar i{display:block;height:100%;background:linear-gradient(90deg,#00d084,#a3e635)}
.xpline{font-size:13.5px;color:var(--mute);margin-top:4px}
.me-stats{display:flex;gap:10px}
.me-stats div{background:var(--panel2);border-radius:14px;padding:8px 14px;text-align:center;min-width:84px}
.me-stats b{display:block;font-family:Fredoka;font-size:22px}
.me-stats span{font-size:12px;color:var(--mute)}
.sec{display:flex;align-items:baseline;gap:12px;margin:26px 0 12px}
.sec h2{font-size:24px}
.sec span{color:var(--mute);font-size:14px}
.path{position:relative;display:grid;gap:14px;padding:4px 0}
.path::before{content:'';position:absolute;left:50%;top:20px;bottom:20px;border-left:4px dashed #34446f;transform:translateX(-2px)}
.node{position:relative;display:flex;align-items:center;gap:14px;width:calc(50% + 40px);text-decoration:none;color:var(--ink);background:var(--panel);border:3px solid var(--line);border-radius:20px;padding:12px 16px;transition:transform .15s}
.node.l{flex-direction:row-reverse;text-align:right;margin-right:auto}
.node.r{margin-left:auto}
.node:not(.locked):hover{transform:translateY(-3px);border-color:#5b6fb0}
.node .bub{position:relative;flex:none;width:64px;height:64px;border-radius:50%;display:grid;place-items:center;font-size:32px;background:var(--panel2);border:4px solid #34446f}
.node .bub em{position:absolute;right:-6px;bottom:-6px;width:26px;height:26px;border-radius:50%;background:var(--go);color:#fff;font-size:15px;font-style:normal;display:grid;place-items:center;border:3px solid var(--bg)}
.node .nt{flex:1;min-width:0}
.node small{display:block;font-size:12px;letter-spacing:.06em;color:var(--mute);text-transform:uppercase}
.node b{display:block;font-family:Fredoka;font-size:21px;line-height:1.2}
.node .nt>span{display:block;color:var(--mute);font-size:14px}
.node .pbar{display:block;height:7px;border-radius:9px;background:#0b1020;margin-top:6px;overflow:hidden}
.node .pbar i{display:block;height:100%;background:var(--go)}
.node .lk{font-size:13px;color:#ffb4b4}
.node.done{border-color:#2f8f62}.node.done .bub{border-color:var(--go);background:#123a2b}
.node.cur{border-color:var(--gold);box-shadow:0 0 0 5px rgba(255,200,61,.18)}
.node.cur .bub{border-color:var(--gold);animation:bob 1.6s ease-in-out infinite}
.node.cur small{color:var(--gold)}
@keyframes bob{50%{transform:translateY(-5px)}}
.node.locked{opacity:.55;cursor:not-allowed}
.cards2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.fb-card{display:flex;gap:14px;align-items:center;background:linear-gradient(135deg,#065f46,#0e7490);border-radius:20px;padding:18px;color:#fff;text-decoration:none}
.fb-card .ic{font-size:44px}
.fb-card b{display:block;font-family:Fredoka;font-size:22px}
.info-card{background:var(--panel);border:2px solid var(--line);border-radius:20px;padding:16px 18px;font-size:14.5px}
.info-card h3{font-size:18px;margin-bottom:6px}
.info-card ul{margin:6px 0 0;padding-left:20px}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.badge{background:var(--panel);border:2px solid var(--line);border-radius:16px;padding:12px;text-align:center;opacity:.55}
.badge.got{opacity:1;border-color:var(--gold);background:linear-gradient(180deg,#2a2a17,#1d2843)}
.badge span{display:block;font-size:34px}
.badge b{display:block;font-family:Fredoka;font-size:16px}
.badge small{display:block;color:var(--mute);font-size:12.5px;line-height:1.3}
.credit{text-align:center;color:var(--mute);font-size:13px;margin-top:30px}

/* ------------------------------------------------------------------ lesson player */
body.lab{overflow-x:hidden}
.lp-top{display:flex;align-items:center;gap:12px;padding:8px 14px;background:#0b1020;border-bottom:2px solid var(--line);flex-wrap:wrap;position:sticky;top:0;z-index:20}
.lp-top .back{color:var(--mute);text-decoration:none;font-weight:800;white-space:nowrap}
.lp-top .back:hover{color:#fff}
.lp-top h1{font-size:18px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:34vw}
.dots{display:flex;gap:5px;flex-wrap:wrap;flex:1;justify-content:center}
.dot{width:32px;height:32px;border-radius:10px;border:2px solid var(--line);background:var(--panel);font-size:15px;padding:0;opacity:.6}
.dot.done{opacity:1;border-color:#2f8f62;background:#123a2b}
.dot.cur{opacity:1;border-color:var(--gold);background:#3a3313;transform:scale(1.12)}
.dot:disabled{cursor:default}
.xpchip{position:relative;display:flex;align-items:center;gap:8px;background:var(--panel);border:2px solid var(--line);border-radius:999px;padding:4px 12px;font-size:13.5px;white-space:nowrap}
.xpchip b{color:var(--gold)}
.xpchip .xpbar{width:70px;height:8px}
.xpchip .xpn{color:var(--mute)}
.xpfloat{position:absolute;right:10px;top:-4px;color:#7dffb3;font-family:Fredoka;font-size:20px;animation:floatup 1.4s forwards;pointer-events:none}
@keyframes floatup{to{transform:translateY(-40px);opacity:0}}
.lp-main{display:grid;grid-template-columns:minmax(360px,44%) 1fr;gap:14px;padding:14px;height:calc(100vh - 118px);min-height:560px}
.lp-left{display:flex;flex-direction:column;gap:12px;min-height:0;overflow:auto;padding-right:4px}
.lp-right{display:flex;flex-direction:column;gap:10px;min-height:0}
#card{background:var(--panel);border:2px solid var(--line);border-radius:18px;padding:16px 18px}
#card .kick{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute)}
#card h2{font-size:24px;margin:2px 0 8px}
#card .body p{margin:8px 0}
#card ul,#card ol{padding-left:22px}
.tipbox{background:rgba(10,132,255,.12);border:2px solid rgba(10,132,255,.45);border-radius:12px;padding:10px 12px;margin:10px 0}
.warnbox{background:rgba(255,77,77,.1);border:2px solid rgba(255,77,77,.45);border-radius:12px;padding:10px 12px;margin:10px 0}
.mock-explorer{background:#1b1f2b;border:1px solid #2b3245;border-radius:12px;padding:8px 12px;font-size:14.5px;margin:10px 0}
.mock-explorer div{padding:2px 0}
.mock-explorer .in1{padding-left:20px}.mock-explorer .in2{padding-left:40px}
.mock-explorer .hl{background:rgba(10,132,255,.25);border-radius:6px}
.mock-explorer .dim{color:var(--mute);font-size:12.5px}
.axes{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.ax{border-radius:10px;padding:6px 10px;font-weight:900;font-size:14px}
.ax.x{background:#5c1f1f;color:#ff8a8a}.ax.y{background:#1f4a25;color:#8aff9a}.ax.z{background:#1f2f5c;color:#8ab4ff}
table.ops{border-collapse:collapse;margin:10px 0;font-size:14px}
table.ops td{padding:4px 8px;border:1px solid var(--line)}
.checklist{list-style:none;padding:0!important}
.checklist li{padding:4px 0}
.demo{background:#0f1730;border:2px dashed #34446f;border-radius:14px;padding:10px 12px;margin-top:12px}
.demo-h{font-size:13.5px;color:var(--mute)}
.next{margin-top:14px;display:flex;justify-content:flex-end}
.q{font-size:18px;margin:6px 0 12px}
.opts{display:grid;gap:8px}
.opt{text-align:left;background:var(--panel2);border:3px solid var(--line);border-radius:14px;padding:11px 14px;color:var(--ink);font-size:16px}
.opt:hover:not(:disabled){border-color:#5b6fb0}
.opt.right{border-color:var(--go);background:rgba(0,176,111,.18)}
.opt.wrong{border-color:var(--red);background:rgba(255,77,77,.12);opacity:.8}
.fb{margin-top:12px;border-radius:14px;padding:10px 14px}
.fb.ok{background:rgba(0,176,111,.15);border:2px solid var(--go)}
.fb.no{background:rgba(255,77,77,.1);border:2px solid var(--red)}
.fb.big b{font-family:Fredoka;font-size:20px}
.fillcode{font-size:16px;line-height:2.1}
.slot{min-width:84px;height:32px;border:2px dashed #6b7aa8;border-radius:8px;background:#0b1020;color:#fdfbac;font-family:ui-monospace,Menlo,monospace;font-size:15px;padding:0 8px;vertical-align:middle}
.slot.full{border-style:solid;border-color:var(--blue);background:#13254a}
.slot.bad{border-color:var(--red);background:#3a1515;animation:shake .3s}
@keyframes shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.bank,.snips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.chip{background:var(--panel2);border:2px solid #4a5c92;border-radius:10px;padding:7px 12px;color:#fff;font-family:ui-monospace,Menlo,monospace;font-weight:700}
.snips .chip{font-family:Nunito,sans-serif}
.chip.used{opacity:.25}
.goals-h{font-family:Fredoka;font-size:17px;margin-top:12px}
.goals{list-style:none;padding:0!important;margin:6px 0}
.goals li{position:relative;padding:6px 10px 6px 36px;border-radius:10px;background:#0f1730;margin:5px 0;transition:background .3s}
.goals li::before{content:'';position:absolute;left:10px;top:9px;width:16px;height:16px;border-radius:5px;border:2px solid #6b7aa8}
.goals li.ok{background:rgba(0,176,111,.18)}
.goals li.ok::before{content:'✓';border-color:var(--go);background:var(--go);color:#fff;font-size:12px;line-height:14px;text-align:center}
.tools{margin-top:10px}
.tools .btn{padding:7px 12px;font-size:14px}
.hint{background:rgba(255,200,61,.1);border:2px dashed var(--gold);border-radius:12px;padding:8px 12px;margin-top:8px;color:#ffe6a3}
.runtip{margin:10px 0 0}
ol.studio{list-style:none;padding:0!important;margin:10px 0}
ol.studio li{display:flex;gap:12px;margin:12px 0}
ol.studio .sn{flex:none;width:32px;height:32px;border-radius:50%;background:var(--blue);display:grid;place-items:center;font-family:Fredoka}
ol.studio .sb{flex:1;min-width:0}
ol.studio .sb p{margin:4px 0}
.mock{background:#2e2e2e;border:1px solid #444;border-radius:10px;overflow:hidden;margin:8px 0;font-size:13.5px;max-width:420px;color:#ddd;font-weight:600}
.mock .mh{background:#3c3c3c;padding:4px 10px;font-size:12px;color:#bbb}
.mock.explorer div:not(.mh){padding:3px 10px}
.mock .hl{background:#0b5394;color:#fff}
.mock.explorer em{float:right;font-style:normal;color:#fff;background:#2b6fd6;border-radius:50%;width:18px;height:18px;display:grid;place-items:center;font-size:12px}
.mock.props div:not(.mh){display:flex;justify-content:space-between;padding:3px 10px;border-bottom:1px solid #3a3a3a}
.mock.props span{color:#aaa}
.mock.script pre.code{margin:0;border:0;border-radius:0;font-size:13px}
.mock.output div:not(.mh){padding:4px 10px;font-family:ui-monospace,monospace}
.mock.ribbon .tabs{display:flex;gap:12px;padding:5px 10px;background:#3c3c3c;font-size:12.5px}
.mock.ribbon .tabs .on{color:#fff;border-bottom:2px solid #2b6fd6}
.mock.ribbon .btns{display:flex;gap:4px;padding:8px}
.mock.ribbon .btns span{text-align:center;padding:4px 8px;border-radius:6px;font-size:12px;line-height:1.3}
.mock.ribbon .btns .hl{background:#0b5394;box-shadow:0 0 0 2px #59a5ff}
/* editor */
#edwrap{background:var(--panel);border:2px solid var(--line);border-radius:18px;padding:10px;display:flex;flex-direction:column;gap:8px}
.edhead{display:flex;align-items:center;gap:8px}
.edhead .fname{font-size:13px;color:var(--mute);flex:1}
.edhead .btn{padding:8px 16px}
.btn.run.again{background:#6d28d9;box-shadow:0 4px 0 #4c1d95}
.ce{display:flex;flex-direction:column;gap:6px}
.ce-wrap{display:flex;background:var(--code-bg);border:1px solid #2b3245;border-radius:12px;overflow:auto;max-height:52vh;min-height:220px}
.ce-gut{flex:none;padding:12px 8px 12px 10px;text-align:right;color:#59627a;font:500 14.5px/1.55 ui-monospace,Menlo,Consolas,monospace;user-select:none;background:#171a24;border-right:1px solid #262b3a}
.ce-gut span{display:block}
.ce-gut span.err{color:#fff;background:#c0392b;border-radius:4px;padding:0 3px}
.ce-area{position:relative;flex:1;min-width:0}
.ce-hl,.ce-ta{margin:0;padding:12px 14px;font:500 14.5px/1.55 ui-monospace,Menlo,Consolas,monospace;white-space:pre;tab-size:4;letter-spacing:0;border:0}
.ce-hl{color:#e5e9f0;min-height:100%;pointer-events:none}
.ce-line{display:inline-block;min-width:100%}
.ce-line.err{background:rgba(255,60,60,.22)}
.ce-ta{position:absolute;inset:0;width:100%;height:100%;background:transparent;color:transparent;caret-color:#fff;resize:none;outline:0;overflow:hidden}
.ce-ta::selection{background:rgba(120,160,255,.35)}
.ce.ro .ce-ta{caret-color:transparent}
.ce-bar{display:flex;gap:6px;overflow-x:auto;padding-bottom:2px;scrollbar-width:thin}
.ce-bar button{flex:none;background:#26304d;border:1px solid #3a4770;color:#dfe6ff;border-radius:8px;padding:6px 9px;font:600 13px ui-monospace,Menlo,monospace}
.ce-bar button:active{background:#3a4770}
/* world + output */
#world{flex:1;min-height:300px;border-radius:18px;border:2px solid var(--line)}
#output{height:150px;flex:none;overflow:auto;background:#101522;border:2px solid var(--line);border-radius:14px;padding:6px 10px;font:500 13.5px/1.5 ui-monospace,Menlo,Consolas,monospace}
#output .ts{color:#59627a;margin-right:8px}
.o-out{color:#e5e9f0}.o-warn{color:#ffb84d}.o-error{color:#ff6b6b}.o-info{color:#7f8ba3}
.o-error.jump{cursor:pointer}
.o-tip{font-family:Nunito,sans-serif;font-weight:700;color:#ffe6a3;background:rgba(255,200,61,.08);border-radius:8px;padding:3px 8px;margin:2px 0 4px}
.overlay{position:fixed;inset:0;z-index:80;background:rgba(5,8,20,.7);display:grid;place-items:center;padding:16px}
.done-card{background:var(--panel);border:3px solid var(--gold);border-radius:24px;padding:26px;text-align:center;max-width:460px;animation:pop .5s}
.done-card .big{font-size:72px;line-height:1}
.done-card h2{font-size:32px;margin:8px 0}
@keyframes pop{0%{transform:scale(.6);opacity:0}70%{transform:scale(1.05)}100%{transform:scale(1)}}

@media (max-width:900px){
  .lp-main{display:block;height:auto;padding:12px}
  .lp-left{overflow:visible;padding:0}
  .lp-right{margin-top:12px}
  #world{height:62vh;min-height:320px}
  .lp-top h1{max-width:60vw;font-size:16px}
  .dots{order:3;flex-basis:100%;justify-content:flex-start}
  .ce-wrap{max-height:none}
}
@media (max-width:640px){
  .hero h1{font-size:27px}
  .hero .blocks{opacity:.35}
  .path::before{left:44px}
  .node,.node.l{width:100%;flex-direction:row;text-align:left;margin:0}
  .cards2{grid-template-columns:1fr}
  .me-stats{width:100%}
  .me-stats div{flex:1}
}