@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Arabic:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');
:root{--bg:#101b2b;--panel:#19273b;--panel2:#13202f;--code:#0d1623;--line:#34465d;--text:#f1f5fa;--muted:#b5c4d8;--lime:#d4f578;--cyan:#81d8e9;--coral:#ffa18a;--violet:#c1b4fa;--gold:#f1cd82;--ink:#172331;--ok:#7fe0a0;--mono:'JetBrains Mono',Consolas,'Courier New',monospace}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.75 'IBM Plex Sans Arabic',Tahoma,sans-serif;min-height:100vh}
body:before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 12% 10%,#28455766,transparent 45%),radial-gradient(ellipse at 90% 80%,#3a2f5a40,transparent 45%),linear-gradient(#ffffff03 1px,transparent 1px),linear-gradient(90deg,#ffffff03 1px,transparent 1px);background-size:auto,auto,52px 52px,52px 52px}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(30px,5vw,52px);line-height:1.35;margin-bottom:14px;letter-spacing:-.5px}
h2{font-size:22px;line-height:1.5;margin-bottom:6px}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;touch-action:manipulation}
button:disabled{cursor:default;opacity:.55}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
code,pre,textarea.code,.ltr{font-family:var(--mono);direction:ltr;unicode-bidi:isolate}
code{background:var(--code);color:var(--lime);border-radius:7px;padding:2px 8px;font-size:.88em;word-break:break-word}
.muted{color:var(--muted);font-size:15px}
.hidden{display:none!important}
#app{max-width:940px;margin:0 auto;padding:24px 16px 120px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:22px;margin-bottom:18px}
.eyebrow{font-size:13px;letter-spacing:1px;color:var(--cyan);display:flex;align-items:center;gap:10px;margin-bottom:14px}
.eyebrow:before{content:'';width:26px;height:2px;background:var(--cyan)}
.lead{color:var(--muted);font-size:18px}
.lbl,.cap{font-size:13px;color:var(--cyan);margin:14px 0 6px}
.cap{margin:0;color:var(--muted);margin-inline-end:8px}
.hl{background:linear-gradient(100deg,var(--lime),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}

/* buttons */
.btn{background:var(--lime);color:var(--ink);border:0;border-radius:14px;padding:12px 26px;font-weight:700;transition:transform .12s,box-shadow .2s;display:inline-block;text-align:center}
.btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 22px #d4f57833}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover:not(:disabled){border-color:var(--cyan)}
.btn.sm{padding:6px 14px;font-size:14px;border-radius:10px}
.btn.pulse{animation:pulse 1.6s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 #d4f57855}70%{box-shadow:0 0 0 14px #d4f57800}100%{box-shadow:0 0 0 0 #d4f57800}}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:12px}
.input{width:100%;background:var(--code);border:1px solid var(--line);border-radius:12px;padding:11px 14px;margin-bottom:6px}

/* home */
.hero{position:relative;padding:44px 0 26px;overflow:hidden}
.floaty{position:absolute;inset:0;pointer-events:none;opacity:.35}
.floaty span{position:absolute;font-family:var(--mono);color:var(--cyan);font-size:22px;left:calc(8% + var(--i)*15%);top:calc(10% + (var(--i)*37)*1%);animation:bob 6s ease-in-out infinite;animation-delay:calc(var(--i)*-1s)}
.floaty span:nth-child(odd){color:var(--lime)}
@keyframes bob{50%{transform:translateY(-16px) rotate(4deg)}}
.cards{display:grid;gap:18px}
.exam-card{display:block;background:linear-gradient(160deg,#1d3048,#17263a);border:1px solid var(--line);border-radius:22px;padding:24px;transition:transform .2s,border-color .2s}
.exam-card:hover{transform:translateY(-4px);border-color:var(--lime)}
.ec-top{display:flex;gap:8px;margin-bottom:10px}
.badge{background:#27352e;border:1px solid #657f42;color:var(--lime);border-radius:30px;padding:2px 12px;font-size:13px}
.badge.alt{background:#1d3340;border-color:#3d7f92;color:var(--cyan)}
.meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:14px;margin:8px 0 12px}
.types{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.tchip{background:var(--code);border:1px solid var(--line);border-radius:10px;padding:3px 10px;font-size:13px}
.go{color:var(--lime);font-weight:700}

/* intro */
.rules{color:var(--muted);padding-inline-start:20px}
.rules li{margin-bottom:6px}
.stagelist{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px;margin:18px 0}
.stg{display:flex;gap:10px;align-items:center;background:var(--code);border:1px solid var(--line);border-radius:14px;padding:10px 14px}
.stg b{background:var(--lime);color:var(--ink);width:28px;height:28px;border-radius:50%;display:grid;place-items:center;flex:none}

/* HUD */
.hud{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;margin:-24px -16px 18px;padding:12px 16px;background:#101b2bdd;backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.back{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;flex:none}
.dots{display:flex;gap:5px;flex:1;min-width:0;flex-wrap:wrap}
.dot{width:14px;height:14px;border-radius:50%;border:2px solid var(--line);background:transparent;padding:0;transition:transform .15s}
.dot:hover{transform:scale(1.3)}
.dot.gap{margin-inline-start:9px}
.dot.tried{border-color:var(--coral)}
.dot.help{background:var(--cyan);border-color:var(--cyan)}
.dot.clean{background:var(--lime);border-color:var(--lime)}
.dot.boss{border-radius:4px}
.dot.cur{box-shadow:0 0 0 3px #81d8e977;transform:scale(1.25)}
.stats{display:flex;gap:12px;align-items:center;font-size:15px;white-space:nowrap}
.sc{background:#27352e;border:1px solid #657f42;color:var(--lime);border-radius:30px;padding:2px 14px;direction:ltr;font-weight:700}
.sc small{opacity:.7;font-weight:400}
.streak{color:var(--gold);font-weight:700}
.time{color:var(--muted);direction:ltr;font-family:var(--mono);font-size:13px}

/* question */
.qa.in{animation:rise .35s ease}
@keyframes rise{from{opacity:0;transform:translateY(14px)}}
.qhead{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:10px;font-size:13px}
.qhead span{border-radius:30px;padding:1px 12px;border:1px solid var(--line);background:var(--panel)}
.tag{color:var(--cyan)}.diff{color:var(--gold);letter-spacing:2px}.pts{color:var(--lime);margin-inline-start:auto}
.qa h2{font-size:clamp(22px,4vw,30px)}
.bosst{background:linear-gradient(100deg,var(--coral),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.story{background:var(--panel);border-inline-start:4px solid var(--violet);border-radius:10px;padding:10px 14px;color:var(--muted);margin-bottom:10px}
.ask{font-size:18px;font-weight:500}
.widget{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:18px;margin:14px 0}
pre.json,pre.plain{background:var(--code);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:0 0 10px;overflow:auto;text-align:left;font-size:14px;line-height:1.6;max-height:300px}
pre.plain{white-space:pre-wrap;font-size:13.5px}
.json i{font-style:normal}.json .k{color:var(--cyan)}.json .s,.s{color:var(--lime)}.json .n,.n{color:var(--gold)}.json .b{color:var(--violet)}
.blk .cap{display:block;margin-bottom:4px}
.tabs{display:flex;gap:6px;margin-bottom:8px}
.tab{background:transparent;border:1px solid var(--line);border-radius:10px;padding:4px 14px;font-size:14px}
.tab.on{background:var(--cyan);color:var(--ink);border-color:var(--cyan);font-weight:700}
textarea.code{width:100%;background:var(--code);border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:15px;resize:vertical;text-align:left;min-height:56px}
textarea.code:focus{border-color:var(--cyan)}
.prevs{display:grid;gap:6px;margin-top:8px}
.want,.prev{display:flex;align-items:center;gap:6px;flex-wrap:wrap;border-radius:10px;padding:6px 12px;border:1px dashed var(--line);font-size:14px}
.want{border-color:#657f42}
.prev.ok{border:1px solid var(--ok);background:#1a2c28}
.prev.no{border:1px solid var(--coral);background:#2d2224}
.prev.err{border:1px solid var(--coral);background:#2d2224;color:var(--coral)}
.prev.err code{color:var(--coral);background:transparent;padding:0;font-family:inherit;direction:rtl}
.prev.ok code{color:var(--ok)}

/* build */
.comp,.pal{display:flex;gap:8px;flex-wrap:wrap;padding:12px;border-radius:14px;min-height:56px}
.comp{background:var(--code);border:2px dashed var(--line);align-items:center}
.chip{background:var(--panel2);border:1px solid var(--cyan);color:var(--cyan);border-radius:10px;padding:6px 12px;font-family:var(--mono);font-size:14px;transition:transform .12s}
.chip:hover:not(:disabled){transform:translateY(-2px)}
.chip.placed{background:var(--cyan);color:var(--ink);font-weight:700}

/* pick */
.tree{background:var(--code);border:1px solid var(--line);border-radius:14px;padding:10px;font-size:14px;overflow:auto;text-align:left}
.kids{margin-left:20px;border-left:1px dashed var(--line);padding-left:6px}
.node{display:block;width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:8px;padding:3px 10px;font-family:var(--mono);font-size:14px}
.node:hover:not(:disabled){background:#81d8e91a}
.node.sel{background:#d4f57826;border-color:var(--lime)}
.node .k{color:var(--cyan)}
.picked{margin-top:10px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}

/* spot / map rows */
.srow,.frow{background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:10px}
.srow.right,.frow.right{border-color:var(--ok)}
.srow.wrongj,.frow.wrongj{border-color:var(--coral)}
.top{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-bottom:6px}
.colname{background:var(--violet);color:var(--ink);border-radius:8px;padding:0 10px;font-family:var(--mono);font-size:13px;font-weight:700}
.flag{background:transparent;border:1px solid var(--line);border-radius:10px;padding:3px 12px;font-size:14px}
.flag[aria-checked=true]{background:var(--coral);color:var(--ink);border-color:var(--coral);font-weight:700}
.reveal{margin-top:6px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.reveal:empty{display:none}
.tagok,.tagbad{font-size:12px;border-radius:20px;padding:0 10px}
.tagok{background:var(--ok);color:var(--ink)}.tagbad{background:var(--coral);color:var(--ink)}
.reveal p{margin:0;flex-basis:100%}
.fres:empty{display:none}

/* predict */
.big{font-size:19px;margin-bottom:6px}.big code{font-size:1em;padding:8px 14px;display:inline-block}
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.opt{background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:14px;font-family:var(--mono);font-size:15px;transition:transform .12s,border-color .2s}
.opt:hover:not(:disabled){transform:translateY(-2px);border-color:var(--cyan)}
.opt.on{border-color:var(--lime);background:#d4f57820}

/* match: fill-in slots + bank */
.mrows{display:grid;gap:10px;margin:8px 0}
.mrow{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:10px;align-items:center;background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:10px 12px}
.mrow code{background:transparent;padding:0;color:var(--text);font-size:14px;word-break:break-all;text-align:left}
.arrow{color:var(--cyan);font-size:20px}
.slot{min-height:46px;border:2px dashed var(--line);border-radius:12px;background:var(--code);color:var(--muted);font-family:var(--mono);font-size:14px;padding:6px 10px;transition:border-color .15s,background .15s}
.slot:hover{border-color:var(--cyan)}
.slot.sel{border-style:solid;border-color:var(--cyan);box-shadow:0 0 0 3px #81d8e944;color:var(--text)}
.slot.filled{border-style:solid;border-color:var(--lime);background:#d4f57818;color:var(--lime);font-weight:700}
.bank{display:flex;flex-wrap:wrap;gap:10px;padding:12px;border-radius:14px;background:var(--code);min-height:58px;align-items:center}
.bank .chip{font-size:15px;padding:8px 16px;cursor:grab}
.bank .chip:active{cursor:grabbing}

/* feedback / hints */
.fbwrap{scroll-margin-bottom:96px}
.fb{border-radius:16px;padding:14px 18px;border:1px solid;margin-bottom:10px}
.fb.ok{border-color:var(--ok);background:#1a2c28}.fb.part{border-color:var(--gold);background:#2d291f}.fb.no{border-color:var(--coral);background:#2d2224}
.fb strong{display:block;margin-bottom:4px}
.fb p{margin:6px 0 0}
.why{color:var(--lime)}
ul.cases{list-style:none;padding:0;margin:6px 0}
ul.cases li{padding:3px 0;font-size:15px}
ul.cases li.ok{color:var(--ok)}ul.cases li.no{color:var(--coral)}
ul.cases li code{font-size:.85em}
.hint{background:var(--panel);border:1px dashed var(--gold);border-radius:12px;padding:8px 14px;margin-bottom:8px;color:var(--gold);font-size:15px}

/* actions */
.actions{position:fixed;inset-inline:0;bottom:0;z-index:15;display:flex;gap:10px;justify-content:center;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:#101b2bee;backdrop-filter:blur(10px);border-top:1px solid var(--line)}
.actions .btn{flex:0 1 220px}

/* stage card */
.stage-card{text-align:center;padding:50px 22px;position:relative;overflow:hidden}
.big-n{font-size:120px;font-weight:700;line-height:1;color:transparent;-webkit-text-stroke:2px var(--lime);opacity:.5;margin-bottom:-14px}
.stage-card .eyebrow{justify-content:center}

/* results */
.res{text-align:center}
.res .eyebrow{justify-content:center}
.ringwrap{position:relative;width:180px;height:180px;margin:6px auto 12px}
.ring{width:100%;height:100%;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:9}
.ringb{stroke:var(--line)}.ringv{stroke:var(--lime);stroke-linecap:round}
.ringtxt{position:absolute;inset:0;display:grid;place-content:center;direction:ltr}
.ringtxt b{font-size:52px;line-height:1;color:var(--lime)}
.badges{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.bdg{background:var(--code);border:1px solid var(--gold);color:var(--gold);border-radius:30px;padding:3px 14px;font-size:14px}
.skills{display:grid;gap:10px}
.sk{display:grid;grid-template-columns:120px 1fr 46px;gap:10px;align-items:center;font-size:15px}
.sk .bar{height:10px;background:var(--code);border-radius:6px;overflow:hidden}
.sk .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--lime));border-radius:6px}
.sk b{direction:ltr;text-align:left}
.rv{border-bottom:1px solid var(--line)}
.rv summary{cursor:pointer;padding:10px 0;display:flex;gap:6px;align-items:center}
.rv .sp{margin-inline-start:auto;direction:ltr;color:var(--muted);font-size:14px}
.st{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:13px;flex:none;color:var(--ink)}
.st.ok{background:var(--ok)}.st.part{background:var(--gold)}.st.no{background:var(--coral)}
.rvb{padding:0 0 14px}

/* misc */
.dlg{background:var(--panel);color:var(--text);border:1px solid var(--lime);border-radius:20px;padding:22px;max-width:420px}
.dlg::backdrop{background:#000a;backdrop-filter:blur(3px)}
.cf{position:fixed;width:9px;height:9px;border-radius:2px;pointer-events:none;z-index:99}
.skip{position:absolute}

@media (max-width:640px){
  body{font-size:16px}
  .hud{flex-wrap:wrap}.dots{order:3;flex-basis:100%}.stats{margin-inline-start:auto}
  .two{grid-template-columns:1fr}
  .sk{grid-template-columns:90px 1fr 42px}
  .actions .btn{flex:1;padding-inline:10px}
  .widget{padding:12px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media print{.hud,.actions,.btn,.row{display:none!important}body{background:#fff;color:#000}.card{border-color:#999;background:#fff}}

.cnt{color:var(--muted);font-size:14px}
.okmark{width:84px;height:84px;margin:6px auto 14px;border-radius:50%;background:var(--lime);color:var(--ink);font-size:48px;line-height:84px;font-weight:700}

/* timer, waiting room, hand-in */
.time{font-size:15px;font-weight:700;color:var(--text);padding:2px 12px;border:1px solid var(--line);border-radius:30px}
.time.warn{color:var(--gold);border-color:var(--gold)}
.time.danger{color:var(--coral);border-color:var(--coral);animation:pulse 1s infinite}
.center{text-align:center}
.wait{padding:44px 22px}
.spin{width:54px;height:54px;margin:0 auto 18px;border-radius:50%;border:4px solid var(--line);border-top-color:var(--lime);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.timebox{background:#2d291f;border:1px solid var(--gold);color:var(--gold);border-radius:14px;padding:8px 16px;margin:12px 0;display:inline-block}
.warn-note{background:#2d2224;border:1px solid var(--coral);color:var(--coral);border-radius:12px;padding:8px 14px;font-size:15px}
.sendstate{margin:10px 0 0;font-weight:600}
.sendstate.ok{color:var(--ok)}.sendstate.no{color:var(--coral)}
.backup summary{cursor:pointer;font-weight:600}

/* trainer page */
.tr-head{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-bottom:18px}
.tr-head h1{margin:0;font-size:clamp(24px,4vw,34px)}
.stat{display:inline-flex;align-items:center;gap:6px;border-radius:30px;padding:2px 14px;border:1px solid var(--line);font-size:14px}
.stat.on{border-color:var(--ok);color:var(--ok)}.stat.off{color:var(--muted)}
.tr-ctl{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:12px 0}
.tr-ctl input[type=number]{width:90px;background:var(--code);border:1px solid var(--line);border-radius:10px;padding:8px 10px;text-align:center}
.btn.danger{background:var(--coral)}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:14px 0}
.kpi{background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:10px 14px}
.kpi b{display:block;font-size:26px;color:var(--lime);direction:ltr;text-align:right}
.qbars{display:grid;gap:6px;margin:8px 0 16px}
.qb{display:grid;grid-template-columns:150px 1fr 44px;gap:10px;align-items:center;font-size:14px}
.qb .bar{height:10px;background:var(--code);border-radius:6px;overflow:hidden}
.qb .bar i{display:block;height:100%;border-radius:6px;background:var(--lime)}
.qb .bar i.low{background:var(--coral)}.qb .bar i.mid{background:var(--gold)}
.qb b{direction:ltr;text-align:left}
.tbl{width:100%;border-collapse:collapse;font-size:15px}
.tbl th,.tbl td{padding:8px 10px;text-align:right;border-bottom:1px solid var(--line)}
.tbl th{color:var(--cyan);font-weight:500;font-size:13px}
.tbl tr.row-main{cursor:pointer}.tbl tr.row-main:hover{background:#ffffff08}
.sc-pill{display:inline-block;min-width:54px;text-align:center;border-radius:20px;padding:0 10px;font-weight:700;color:var(--ink)}
.sc-hi{background:var(--ok)}.sc-mid{background:var(--gold)}.sc-lo{background:var(--coral)}
.mini{display:flex;gap:3px;direction:ltr}
.mini i{width:9px;height:14px;border-radius:2px;background:var(--coral)}
.mini i.p{background:var(--gold)}.mini i.f{background:var(--ok)}
.tr-detail td{background:var(--panel2);padding:12px 16px}
.qrow{border-bottom:1px solid var(--line);padding:6px 0}
.qrow summary{cursor:pointer;display:flex;gap:8px;align-items:center}
.qrow .sp{margin-inline-start:auto;direction:ltr;color:var(--muted)}
.tbl-wrap{overflow-x:auto}
@media (max-width:640px){
  .mrow{grid-template-columns:1fr;gap:6px}
  .arrow{transform:rotate(-90deg);justify-self:start}
  .qb{grid-template-columns:100px 1fr 40px}
}
.badge.live{background:#1a2c28;border-color:var(--ok);color:var(--ok);animation:pulse 2s infinite}
.toast{position:fixed;inset-inline:16px;bottom:90px;margin-inline:auto;max-width:420px;z-index:120;background:var(--panel);border:1px solid var(--lime);border-radius:14px;padding:10px 18px;text-align:center;box-shadow:0 10px 30px #0008;animation:rise .25s ease}
.toast.err{border-color:var(--coral);color:var(--coral)}.toast.out{opacity:0;transition:opacity .4s}

.trainer-link{text-align:center;margin:34px 0 0;font-size:14px}
.trainer-link a{color:var(--muted);border-bottom:1px dashed var(--line);padding-bottom:2px}
.trainer-link a:hover{color:var(--lime)}