:root{
  --navy:#15337A;--navy2:#0E2458;--navy3:#1F47A6;--gold:#E9A23B;--gold2:#C98620;
  --bg:#F3F5FA;--card:#FFFFFF;--line:#E1E6F0;--ink:#17213A;--mut:#6B7590;
  --ok:#1B9E63;--okbg:#E6F6EE;--bad:#D64545;--badbg:#FCE9E9;--warn:#F2B440;
  --r:14px;--sh:0 2px 10px rgba(21,51,122,.08);--fs:1;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:"Tajawal","Segoe UI",Tahoma,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
a{color:var(--navy)}
.ltr{direction:ltr;text-align:left;font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.boot{height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px}
.boot img{width:84px;height:84px;border-radius:50%}
.spin{width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--navy);border-radius:50%;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

/* ---------- login ---------- */
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;background:radial-gradient(1200px 600px at 80% -10%,#DCE6FF 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#FFF1DA 0,transparent 60%),var(--bg)}
.login .card{width:100%;max-width:440px;background:var(--card);border-radius:22px;box-shadow:0 12px 40px rgba(21,51,122,.14);padding:34px 28px;text-align:center}
.login img{width:96px;height:96px;border-radius:50%;box-shadow:0 6px 18px rgba(0,0,0,.12)}
.login h1{font-size:26px;margin:16px 0 4px;color:var(--navy2)}
.login .sub{color:var(--mut);margin:0 0 22px}
.login .gbtn{display:flex;justify-content:center;min-height:44px}
.login .note{font-size:13px;color:var(--mut);margin-top:18px;line-height:1.7}
.login .err{background:var(--badbg);color:#9b2c2c;border-radius:10px;padding:12px;margin-top:16px;font-size:14px;line-height:1.7}
.login .err a{color:#9b2c2c;font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--navy);color:#fff;border-radius:12px;padding:12px 20px;font-weight:700;font-size:16px;transition:.15s;text-decoration:none}
.btn:hover{background:var(--navy3)}
.btn.ghost{background:transparent;color:var(--navy);border:1.5px solid var(--line)}
.btn.ghost:hover{background:#fff;border-color:var(--navy)}
.btn.gold{background:var(--gold);color:#1a1a1a}.btn.gold:hover{background:var(--gold2)}
.btn.sm{padding:8px 14px;font-size:14px;border-radius:10px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------- top bar ---------- */
.top{position:sticky;top:0;z-index:20;background:var(--navy2);color:#fff;box-shadow:0 2px 12px rgba(0,0,0,.18)}
.top .w{max-width:1040px;margin:0 auto;display:flex;align-items:center;gap:12px;padding:10px 16px;min-height:60px}
.top .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:#fff;text-decoration:none}
.top .brand img{width:38px;height:38px;border-radius:50%;background:#fff}
.top .sp{flex:1}
.top .chip.cnt{max-width:none;font-weight:700;flex:none;overflow:visible}
.top .chip{background:rgba(255,255,255,.12);border-radius:999px;padding:6px 12px;font-size:14px;white-space:nowrap;max-width:46vw;overflow:hidden;text-overflow:ellipsis}
.top .ib{width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:20px}
.top .ib:hover{background:rgba(255,255,255,.12)}
.top .ttl{font-weight:700;font-size:17px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.wrap{max-width:1040px;margin:0 auto;padding:22px 16px 60px}

/* ---------- home ---------- */
.hero{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:18px}
.hero h1{font-size:26px;margin:0;color:var(--navy2)}
.hero p{margin:4px 0 0;color:var(--mut)}
.tabs{display:inline-flex;background:#E8ECF5;border-radius:14px;padding:4px;gap:4px}
.tabs button{padding:10px 22px;border-radius:11px;font-weight:700;font-size:16px;color:var(--mut)}
.tabs button.on{background:#fff;color:var(--navy);box-shadow:var(--sh)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.set{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 16px 14px;text-align:right;display:flex;flex-direction:column;gap:8px;transition:.15s;box-shadow:var(--sh);position:relative;overflow:hidden}
.set:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(21,51,122,.14);border-color:#C9D4EE}
.set .num{position:absolute;left:-6px;top:-10px;font-size:64px;font-weight:800;color:#EEF1F8;line-height:1}
.set .t{font-weight:800;font-size:19px;color:var(--navy2);position:relative}
.set .s{color:var(--mut);font-size:13.5px;position:relative}
.set .meta{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--mut);margin-top:4px}
.bar{height:7px;background:#EDF0F7;border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--navy3),var(--navy));border-radius:99px;transition:width .3s}
.set.done .bar i{background:linear-gradient(90deg,#20B36F,var(--ok))}
.badge{background:var(--okbg);color:var(--ok);border-radius:8px;padding:2px 8px;font-weight:700}
.badge.g{background:#FFF4E0;color:var(--gold2)}

/* ---------- player ---------- */
.pbar{height:5px;background:#D7DEEE;position:sticky;top:60px;z-index:19}
.pbar i{display:block;height:100%;background:var(--gold);transition:width .3s}
.q{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--sh);padding:20px 20px 16px;margin-bottom:14px}
.q .hd{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.q .hd .n{font-weight:800;color:var(--navy);font-size:17px}
.q .hd .n small{color:var(--mut);font-weight:500;margin-inline-start:6px}
.q .hd .tag{font-size:12.5px;color:var(--mut);background:#F2F4FA;border-radius:8px;padding:3px 10px}
.q img.qi{display:block;max-width:100%;height:auto;margin:4px auto 14px;border-radius:8px}
.q .txt{font-size:calc(19px * var(--fs));line-height:1.65;margin:0 0 14px;color:#111827;font-weight:500}
.opts{display:grid;gap:10px;direction:ltr}
.opts.two{grid-template-columns:1fr 1fr}
@media (max-width:640px){.opts.two{grid-template-columns:1fr}}
.opt{display:flex;align-items:center;gap:12px;width:100%;text-align:left;direction:ltr;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:#FBFCFE;font-size:calc(16.5px * var(--fs));line-height:1.45;transition:.15s;color:var(--ink)}
.opt .L{flex:none;width:32px;height:32px;border-radius:9px;background:#EEF1F8;color:var(--navy);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px}
.opt:hover{border-color:#B9C6E6;background:#fff}
.opt.sel{border-color:var(--navy);background:#EEF3FF}
.opt.ok{border-color:var(--ok);background:var(--okbg)}.opt.ok .L{background:var(--ok);color:#fff}
.opt.bad{border-color:var(--bad);background:var(--badbg)}.opt.bad .L{background:var(--bad);color:#fff}
.opt[disabled]{cursor:default}
.opt[disabled]:not(.ok):not(.bad){opacity:.6}
.fb{margin-top:14px;border-radius:14px;padding:14px 16px;animation:fade .25s}
.fb.ok{background:var(--okbg);border:1px solid #BFE6D1}.fb.bad{background:var(--badbg);border:1px solid #F2C4C4}
.fb .h{font-weight:800;font-size:17px;margin-bottom:6px}
.fb.ok .h{color:var(--ok)}.fb.bad .h{color:var(--bad)}
.fb .ans{font-size:15px;margin-bottom:8px}.fb .ans b{direction:ltr;unicode-bidi:embed}
.fb .ex{white-space:pre-line;font-size:calc(15.5px * var(--fs));line-height:1.8;color:#2B3644;background:rgba(255,255,255,.6);border-radius:10px;padding:10px 12px}
.fb .exl{font-weight:700;color:var(--navy2);margin-bottom:4px;font-size:14px}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.acts{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px}
.acts .sp{flex:1}
.pass{background:#FFFBF2;border:1px solid #F3E2BD;border-radius:16px;margin-bottom:14px;overflow:hidden}
.pass .ph{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;cursor:pointer;font-weight:800;color:#7A5A12}
.pass .ph span.ar{font-size:13px;color:var(--mut);font-weight:500;margin-inline-start:8px}
.pass .pb{padding:0 18px 16px;direction:ltr;text-align:left;font-family:Georgia,"Times New Roman",serif;font-size:calc(16.5px * var(--fs));line-height:1.75;white-space:pre-line;color:#222;max-height:46vh;overflow:auto}
.pass.closed .pb{display:none}
.ghd{display:flex;align-items:center;gap:10px;margin:0 0 12px;color:var(--navy2);font-weight:800;font-size:15px}
.ghd:before{content:"";width:6px;height:22px;border-radius:4px;background:var(--gold)}
.ghd small{color:var(--mut);font-weight:500}
.ctl{display:inline-flex;background:rgba(255,255,255,.12);border-radius:10px;overflow:hidden;flex:none}
.ctl button{padding:0 11px;height:36px;font-weight:800;color:#fff;font-size:14px;border-inline-end:1px solid rgba(255,255,255,.12)}
.ctl button:last-child{border:0;font-size:16px}
.ctl button:hover{background:rgba(255,255,255,.16)}
.opt.sel{border-color:var(--navy);background:#EEF3FF;box-shadow:0 0 0 2px rgba(21,51,122,.15)}
.opt.sel .L{background:var(--navy);color:#fff}
.ng button[disabled]{opacity:.45;cursor:not-allowed;font-size:13px}

/* navigator drawer */
.nav{position:fixed;inset:0;z-index:40;display:none}
.nav.open{display:block}
.nav .bg{position:absolute;inset:0;background:rgba(10,20,50,.45)}
.nav .sh{position:absolute;right:0;left:0;bottom:0;background:#fff;border-radius:22px 22px 0 0;padding:16px 16px 28px;max-height:78vh;overflow:auto;animation:up .25s}
@keyframes up{from{transform:translateY(40px);opacity:0}to{transform:none;opacity:1}}
.nav .lg{display:flex;gap:14px;font-size:13px;color:var(--mut);margin:0 0 12px;flex-wrap:wrap}
.nav .lg i{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:middle;margin-inline-end:4px}
.ng{display:grid;grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:8px}
.ng button{height:44px;border-radius:10px;font-weight:700;font-size:15px;background:#EEF1F8;color:var(--ink);border:2px solid transparent}
.ng button.ok{background:var(--okbg);color:var(--ok)}.ng button.bad{background:var(--badbg);color:var(--bad)}
.ng button.cur{border-color:var(--navy)}

/* summary */
.sum{background:var(--card);border-radius:20px;box-shadow:var(--sh);border:1px solid var(--line);padding:26px 22px;text-align:center}
.ring{width:150px;height:150px;border-radius:50%;margin:6px auto 12px;display:flex;align-items:center;justify-content:center;background:conic-gradient(var(--ok) calc(var(--p)*1%),#E9EDF5 0);position:relative}
.ring:after{content:"";position:absolute;inset:12px;background:#fff;border-radius:50%}
.ring b{position:relative;font-size:34px;color:var(--navy2)}
.ring b small{font-size:16px;color:var(--mut)}
.sum h2{margin:0 0 4px;color:var(--navy2)}
.stats{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:14px 0 18px}
.stats div{background:#F6F8FC;border-radius:12px;padding:10px 16px;min-width:100px}
.stats b{display:block;font-size:22px}.stats span{font-size:13px;color:var(--mut)}
.stats .ok b{color:var(--ok)}.stats .bad b{color:var(--bad)}
.wl{text-align:right;margin-top:18px}
.wl h3{font-size:16px;color:var(--mut);margin:0 0 8px}
.wl .ng button{height:40px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#17213A;color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;z-index:60;opacity:0;transition:.25s;pointer-events:none}
.toast.on{opacity:1}
.center{text-align:center;padding:40px 10px;color:var(--mut)}
.kbd{font-size:12px;color:var(--mut)}
@media (max-width:640px){
  .wrap{padding:14px 12px 90px}
  .q{padding:16px 14px 12px;border-radius:14px}
  .top .w{padding:8px 12px}
  .hero h1{font-size:22px}
  .tabs button{padding:9px 14px;font-size:15px}
}

/* ---------- dark theme ---------- */
[data-theme="dark"]{--bg:#0F1626;--card:#182238;--line:#283654;--ink:#E7EBF5;--mut:#9DA8C3;--navy:#3B63D6;--navy2:#0B1430;--navy3:#5078E8;
  --okbg:#133426;--badbg:#3A1C22;--sh:0 2px 12px rgba(0,0,0,.35)}
[data-theme="dark"] body{background:var(--bg);color:var(--ink)}
[data-theme="dark"] .login{background:radial-gradient(1200px 600px at 80% -10%,#1A2A5A 0,transparent 60%),var(--bg)}
[data-theme="dark"] .login .card,[data-theme="dark"] .set,[data-theme="dark"] .q,[data-theme="dark"] .sum,[data-theme="dark"] .nav .sh{background:var(--card);color:var(--ink)}
[data-theme="dark"] .login h1,[data-theme="dark"] .hero h1,[data-theme="dark"] .set .t,[data-theme="dark"] .sum h2,[data-theme="dark"] .ghd,[data-theme="dark"] .ring b{color:#DCE4FF}
[data-theme="dark"] .tabs{background:#182238}[data-theme="dark"] .tabs button.on{background:#263654;color:#fff}
[data-theme="dark"] .set .num{color:#1F2B47}
[data-theme="dark"] .bar,[data-theme="dark"] .stats div,[data-theme="dark"] .ng button,[data-theme="dark"] .q .hd .tag,[data-theme="dark"] .opt .L{background:#223050;color:var(--ink)}
[data-theme="dark"] .opt{background:#1C2740;border-color:#2C3A5C;color:var(--ink)}
[data-theme="dark"] .opt:hover{background:#223050;border-color:#4A5F94}
[data-theme="dark"] .opt.sel{background:#1E2E5C;border-color:var(--navy3)}
[data-theme="dark"] .opt.ok{background:#143A2A;border-color:var(--ok)}[data-theme="dark"] .opt.bad{background:#3F1F26;border-color:var(--bad)}
[data-theme="dark"] .q .txt{color:#F1F4FA}
[data-theme="dark"] .q img.qi{background:#fff;padding:10px;border-radius:10px;box-sizing:border-box}
[data-theme="dark"] .fb.ok{background:#12301F;border-color:#1F5A3A}[data-theme="dark"] .fb.bad{background:#381A21;border-color:#6A2A33}
[data-theme="dark"] .fb .ex{background:rgba(0,0,0,.25);color:#E3E8F2}[data-theme="dark"] .fb .exl{color:#C9D4FF}
[data-theme="dark"] .pass{background:#241F12;border-color:#4A3C14}[data-theme="dark"] .pass .ph{color:#F0C76A}[data-theme="dark"] .pass .pb{color:#ECE6D6}
[data-theme="dark"] .btn.ghost{color:#C9D4FF;border-color:#3A4A70}[data-theme="dark"] .btn.ghost:hover{background:#223050}
[data-theme="dark"] .ring{background:conic-gradient(var(--ok) calc(var(--p)*1%),#263654 0)}[data-theme="dark"] .ring:after{background:var(--card)}
[data-theme="dark"] .badge{background:#133426}[data-theme="dark"] .badge.g{background:#3A2E12;color:#F0C76A}
[data-theme="dark"] .pbar{background:#1B2540}
[data-theme="dark"] .kbd,[data-theme="dark"] .mut{color:#8E9AB8}
[data-theme="dark"] .ng button.ok{background:#143A2A;color:#4FD48F}[data-theme="dark"] .ng button.bad{background:#3F1F26;color:#F08080}
[data-theme="dark"] .toast{background:#E7EBF5;color:#0F1626}

.h2{font-size:20px;color:var(--navy2);margin:28px 0 12px}
.wb{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.wbc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;display:flex;align-items:center;gap:14px;box-shadow:var(--sh);flex-wrap:wrap}
.wbc .ic{font-size:30px;width:52px;height:52px;border-radius:12px;background:#EEF1F8;display:flex;align-items:center;justify-content:center;flex:none}
.wbc .tx{flex:1;min-width:140px;display:flex;flex-direction:column}.wbc .tx b{font-size:17px;color:var(--navy2)}.wbc .tx span{font-size:13px}
.wbc .ac{display:flex;gap:8px;flex-wrap:wrap}
.frame{grid-column:1/-1;margin-top:8px;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#000}
.frame iframe{width:100%;height:80vh;border:0;display:block}
.mock{display:flex;align-items:center;justify-content:space-between;gap:14px;background:linear-gradient(135deg,#0F2A6B,#1F47A6);color:#fff;border-radius:var(--r);padding:18px 20px;text-decoration:none;box-shadow:var(--sh)}
.mock .mut{color:#C9D4FF}.mock b{font-size:18px}.mock .btn{background:var(--gold);color:#1a1a1a;flex:none}
[data-theme="dark"] .wbc .ic{background:#223050}[data-theme="dark"] .wbc .tx b{color:#DCE4FF}

/* workbook viewer */
.wbmain{max-width:1000px;margin:0 auto;padding:14px 10px 70px}
.wbwrap{position:relative;background:#fff;border-radius:10px;box-shadow:var(--sh);border:1px solid var(--line);overflow:hidden}
.wbpage canvas{display:block;width:100%;height:auto}
.wbnav{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:12px}
[data-theme="dark"] .wbwrap{border-color:#2C3A5C}

/* avatar / profile / leaderboard */
.av{border-radius:50%;object-fit:cover;background:#EEF1F8;flex:none;display:inline-flex;align-items:center;justify-content:center;vertical-align:middle}
.av.ini{background:var(--gold);color:#1a1a1a;font-weight:800}
.top .chip.me{display:inline-flex;align-items:center;gap:8px;padding:3px 12px 3px 4px;cursor:pointer}
.top .chip.me .av{width:26px;height:26px}
.set.wide{grid-column:1/-1}
.modal{position:fixed;inset:0;background:rgba(10,20,50,.5);display:flex;align-items:center;justify-content:center;z-index:70;padding:14px}
.modal .m{background:var(--card);color:var(--ink);border-radius:18px;max-width:560px;width:100%;max-height:90vh;overflow:auto;padding:22px}
.modal h3{margin:0 0 14px;color:var(--navy2)}
.modal .acts{display:flex;gap:10px;margin-top:16px}
.lbl{display:block;font-size:13px;color:var(--mut);margin:8px 0 4px}
.pf-top{display:flex;gap:14px;align-items:center;margin-bottom:8px}
.pf-top > div{flex:1}
.pf-top input{width:100%;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;font:inherit;font-size:16px;background:var(--card);color:var(--ink)}
.pf-av{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:8px}
.pf-opt{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 4px;border:2px solid var(--line);border-radius:12px;background:var(--card);cursor:pointer;font-size:12px;color:var(--mut)}
.pf-opt.on{border-color:var(--navy);background:#EEF3FF}
.pf-opt.up{font-size:26px}
.podium{display:grid;grid-template-columns:1fr 1.15fr 1fr;gap:10px;align-items:end;margin-bottom:14px}
.pd{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 10px 12px;text-align:center;box-shadow:var(--sh);display:flex;flex-direction:column;align-items:center;gap:4px}
.pd.p1{padding-top:22px;border-color:var(--gold);box-shadow:0 10px 30px rgba(233,162,59,.25)}
.pd .pr{font-size:26px;margin-top:-16px}
.pd b{font-size:16px;color:var(--navy2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pd span{font-size:13px;color:var(--mut)}
.pd.me{outline:2px solid var(--navy3)}
.lbl-list{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--sh)}
.lbr{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid var(--line)}
.lbr:last-child{border:0}
.lbr.me{background:#EEF3FF}
.lbr .rk{width:34px;font-weight:800;color:var(--mut);text-align:center}
.lbr .nm{flex:1;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lbr .sc{min-width:70px;text-align:center}.lbr .sc b{color:var(--ok);font-size:17px}
.lbr .tm{min-width:60px;text-align:center;color:var(--mut);font-size:13.5px}
.lbr .dn{min-width:60px;text-align:center;font-size:12.5px}
@media (max-width:640px){.lbr .dn{display:none}.podium{gap:6px}.pd b{font-size:14px}}
[data-theme="dark"] .pf-opt.on,[data-theme="dark"] .lbr.me{background:#1E2E5C}