:root{
  --bg:#070b1a; --bg2:#0d1428; --card:rgba(255,255,255,.055); --card2:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.10); --line2:rgba(255,255,255,.18);
  --primary:#2563eb; --primary-2:#3b82f6; --violet:#7c3aed; --gold:#f59e0b; --gold-2:#fbbf24;
  --ok:#22c55e; --no:#ef4444;
  --txt:#f4f7ff; --txt2:#c3cbdf; --muted:#8b96b0;
  --r:20px; --r-sm:14px; --r-xs:10px;
  --shadow:0 18px 45px -20px rgba(0,0,0,.85);
  --glass:rgba(255,255,255,.05);
  --f-head:"Baloo Bhaijaan 2","Cairo",system-ui,sans-serif;
  --f-body:"Cairo",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--f-body); color:var(--txt); background:var(--bg);
  min-height:100vh; line-height:1.7; -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(37,99,235,.35), transparent 60%),
    radial-gradient(760px 480px at 6% 4%, rgba(124,58,237,.28), transparent 62%),
    radial-gradient(680px 520px at 50% 108%, rgba(245,158,11,.16), transparent 60%);
  background-attachment:fixed;
}
.icon-sprite{display:none}
.ic{width:20px;height:20px;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3{font-family:var(--f-head);font-weight:800;margin:0;line-height:1.35;letter-spacing:-.01em}
p{margin:0}
a{color:inherit;text-decoration:none}
.app{max-width:1080px;margin:0 auto;padding:0 18px 64px}
.view{animation:fadeUp .45s ease both}
.hide{display:none !important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- topbar ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  position:sticky;top:0;z-index:40;margin:0 -18px 26px;padding:12px 18px;
  background:rgba(7,11,26,.72);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:11px}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(140deg,var(--primary),var(--violet));box-shadow:0 10px 24px -12px rgba(59,130,246,.9)
}
.brand-mark .ic{width:23px;height:23px}
.brand-txt{display:flex;flex-direction:column;line-height:1.2}
.brand-txt strong{font-family:var(--f-head);font-size:19px}
.brand-txt small{color:var(--muted);font-size:11.5px}
.topnav{display:flex;align-items:center;gap:8px}
.ghost{
  display:inline-flex;align-items:center;gap:7px;padding:9px 14px;border-radius:12px;color:var(--txt2);
  border:1px solid transparent;font-weight:600;font-size:14px;transition:.22s
}
.ghost:hover{background:var(--glass);border-color:var(--line2);color:#fff;transform:translateY(-2px)}
.ghost.icon-only{padding:9px;border-color:var(--line)}
.ghost.off{color:var(--muted);opacity:.7}

/* ---------- shared ---------- */
.card{
  background:var(--card);backdrop-filter:blur(12px);border:1px solid var(--line);
  border-radius:var(--r);padding:24px;box-shadow:var(--shadow)
}
.pill{display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;font-size:12.5px;font-weight:700;
  background:rgba(37,99,235,.16);border:1px solid rgba(96,165,250,.35);color:#cfe0ff}
.pill.gold{background:rgba(245,158,11,.14);border-color:rgba(251,191,36,.4);color:#ffe2ab}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:14px 24px;border-radius:14px;
  font-family:var(--f-head);font-weight:700;font-size:16.5px;transition:.24s;border:1px solid transparent
}
.btn .ic{width:21px;height:21px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--violet));color:#fff;box-shadow:0 16px 32px -16px rgba(59,130,246,.95)}
.btn-gold{background:linear-gradient(135deg,var(--gold),#ef8f00);color:#1a1204;box-shadow:0 16px 32px -16px rgba(245,158,11,.9)}
.btn-line{border-color:var(--line2);background:var(--glass);color:var(--txt)}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.99)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn.block{width:100%}
:focus-visible{outline:2px solid var(--gold-2);outline-offset:3px;border-radius:8px}
.grid{display:grid;gap:16px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---------- home ---------- */
.hero{padding:14px 4px 30px;text-align:center}
.hero h1{font-size:clamp(30px,6.4vw,54px);margin-bottom:12px}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,#7dd3fc,#a78bfa 45%,var(--gold-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--txt2);font-size:clamp(14.5px,2.4vw,17px);max-width:620px;margin:0 auto 22px}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:8px}
.cats{grid-template-columns:repeat(auto-fit,minmax(232px,1fr));margin:30px 0 20px}
.cat{
  position:relative;overflow:hidden;text-align:start;border-radius:var(--r);padding:22px;
  background:var(--card);border:1px solid var(--line);backdrop-filter:blur(12px);transition:.26s;cursor:pointer
}
.cat::after{content:"";position:absolute;inset:auto -30% -55% auto;width:180px;height:180px;border-radius:50%;
  background:radial-gradient(circle,var(--glow,rgba(37,99,235,.5)),transparent 68%);opacity:.75;transition:.3s}
.cat:hover{transform:translateY(-4px);border-color:var(--line2);box-shadow:0 22px 44px -24px rgba(0,0,0,.95)}
.cat:hover::after{opacity:1;transform:scale(1.12)}
.cat .cat-ic{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;margin-bottom:14px;
  background:rgba(255,255,255,.08);border:1px solid var(--line2)}
.cat .cat-ic .ic{width:27px;height:27px}
.cat h3{font-size:21px;margin-bottom:6px;position:relative;z-index:2}
.cat p{color:var(--txt2);font-size:13.5px;position:relative;z-index:2}
.cat .cat-count{margin-top:14px;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);position:relative;z-index:2}
.cat .go{position:absolute;inset-inline-start:22px;bottom:20px;width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;background:rgba(255,255,255,.1);border:1px solid var(--line2);z-index:2}
.cat[data-c="science"]{--glow:rgba(56,189,248,.55)} .cat[data-c="science"] .cat-ic{color:#7dd3fc}
.cat[data-c="logic"]{--glow:rgba(167,139,250,.55)} .cat[data-c="logic"] .cat-ic{color:#c4b5fd}
.cat[data-c="history"]{--glow:rgba(251,191,36,.5)} .cat[data-c="history"] .cat-ic{color:var(--gold-2)}
.cat[data-c="mix"]{--glow:rgba(52,211,153,.5)} .cat[data-c="mix"] .cat-ic{color:#6ee7b7}

.setup{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));align-items:start}
.setup h3{font-size:17px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.opts{display:flex;flex-wrap:wrap;gap:9px}
.chip{padding:9px 16px;border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  font-weight:700;font-size:14px;color:var(--txt2);transition:.2s}
.chip:hover{border-color:var(--line2);color:#fff;transform:translateY(-2px)}
.chip.on{background:linear-gradient(135deg,rgba(37,99,235,.9),rgba(124,58,237,.9));color:#fff;border-color:transparent}
.namefield{width:100%;padding:13px 15px;border-radius:13px;background:rgba(0,0,0,.28);border:1px solid var(--line2);
  color:#fff;font-family:inherit;font-size:15px}
.namefield::placeholder{color:var(--muted)}
.startbar{margin-top:22px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.rules{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));margin-top:18px}
.rule{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--txt2)}
.rule .ic{width:19px;height:19px;color:var(--gold-2);margin-top:3px}

/* ---------- quiz ---------- */
.qhead{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:16px}
.qmeta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.scorebox{display:flex;align-items:center;gap:9px;padding:9px 15px;border-radius:14px;background:var(--card);
  border:1px solid var(--line);font-weight:800;font-family:var(--f-head);font-size:16px}
.scorebox .ic{color:var(--gold-2);width:19px;height:19px}
.timer{display:flex;align-items:center;gap:9px;padding:9px 15px;border-radius:14px;background:var(--card);
  border:1px solid var(--line);font-weight:800;font-family:var(--f-head);font-size:16px;min-width:96px}
.timer.warn{border-color:rgba(239,68,68,.6);background:rgba(239,68,68,.12);color:#fecaca;animation:pulse .9s infinite}
@keyframes pulse{50%{transform:scale(1.045)}}
.progress{height:9px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;margin-bottom:24px}
.progress > i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--violet),var(--gold));
  transition:width .4s cubic-bezier(.2,.8,.2,1)}
.qcard{padding:30px 26px;border-radius:var(--r);background:var(--card2);border:1px solid var(--line2);backdrop-filter:blur(14px);box-shadow:var(--shadow)}
.qtag{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;color:#cfe0ff;background:rgba(37,99,235,.18);
  border:1px solid rgba(96,165,250,.35);padding:5px 13px;border-radius:999px;margin-bottom:16px}
.qtext{font-family:var(--f-head);font-size:clamp(19px,3.7vw,28px);font-weight:700;line-height:1.65;margin-bottom:26px}
.answers{display:grid;gap:13px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.ans{
  display:flex;align-items:center;gap:13px;text-align:start;padding:16px 18px;border-radius:15px;font-size:16.5px;font-weight:600;
  background:rgba(255,255,255,.045);border:1px solid var(--line);color:var(--txt);transition:.2s;width:100%
}
.ans:hover:not(:disabled){transform:translateY(-3px);border-color:rgba(96,165,250,.6);background:rgba(37,99,235,.16)}
.ans:disabled{cursor:default}
.ans .key{width:34px;height:34px;flex:0 0 auto;border-radius:11px;display:grid;place-items:center;font-family:var(--f-head);
  font-weight:800;font-size:15px;background:rgba(255,255,255,.08);border:1px solid var(--line2)}
.ans.good{background:rgba(34,197,94,.18);border-color:rgba(34,197,94,.65);animation:pop .35s}
.ans.bad{background:rgba(239,68,68,.16);border-color:rgba(239,68,68,.6);animation:shake .4s}
.ans.faded{opacity:.34;filter:grayscale(.6)}
.ans .mark{margin-inline-start:auto}
@keyframes pop{40%{transform:scale(1.025)}}
@keyframes shake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
.feedback{margin-top:22px;padding:18px;border-radius:16px;border:1px solid var(--line2);background:rgba(0,0,0,.25);
  display:flex;gap:13px;align-items:flex-start;animation:fadeUp .35s}
.feedback .ic{width:23px;height:23px;margin-top:3px}
.feedback.good .ic{color:var(--ok)} .feedback.bad .ic{color:var(--no)}
.feedback strong{display:block;font-family:var(--f-head);font-size:16.5px;margin-bottom:3px}
.feedback p{font-size:14.5px;color:var(--txt2)}
.lifelines{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;align-items:center}
.life{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:13px;border:1px solid var(--line2);
  background:rgba(245,158,11,.12);color:#ffe2ab;font-weight:700;font-size:14px;transition:.22s}
.life:hover:not(:disabled){transform:translateY(-2px);background:rgba(245,158,11,.2)}
.life:disabled{opacity:.38;cursor:not-allowed;background:rgba(255,255,255,.04);color:var(--muted)}
.nextbar{margin-top:22px;display:flex;justify-content:flex-end}

/* ---------- results / review / leaderboard ---------- */
.result-hero{text-align:center;padding:34px 22px}
.ring{width:190px;height:190px;margin:0 auto 20px;border-radius:50%;display:grid;place-items:center;position:relative;
  background:conic-gradient(var(--ring-c,#22c55e) calc(var(--pct,0) * 1%), rgba(255,255,255,.09) 0)}
.ring::before{content:"";position:absolute;inset:13px;border-radius:50%;background:#0b1020}
.ring .ring-in{position:relative;z-index:2;text-align:center}
.ring .big{font-family:var(--f-head);font-size:44px;font-weight:800;line-height:1}
.ring .small{font-size:12.5px;color:var(--muted)}
.result-hero h2{font-size:clamp(24px,4.6vw,36px);margin-bottom:8px}
.result-hero .verdict{color:var(--txt2);font-size:16px;max-width:520px;margin:0 auto 22px}
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:22px}
.chipstat{padding:11px 17px;border-radius:14px;background:var(--card);border:1px solid var(--line);font-size:14px;font-weight:700}
.chipstat b{font-family:var(--f-head);font-size:19px;display:block;color:var(--gold-2)}
.actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.review{margin-top:26px;display:grid;gap:13px}
.rev{padding:18px;border-radius:16px;background:var(--card);border:1px solid var(--line);border-inline-start:4px solid var(--no)}
.rev.ok{border-inline-start-color:var(--ok)}
.rev .rq{font-family:var(--f-head);font-weight:700;font-size:16.5px;margin-bottom:9px}
.rev .line{font-size:14px;color:var(--txt2);display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.rev .line b{color:#fff;font-weight:700}
.tag-mini{font-size:11.5px;padding:3px 9px;border-radius:999px;background:rgba(255,255,255,.09);border:1px solid var(--line2)}
.board{display:grid;gap:11px;margin-top:8px}
.row{display:flex;align-items:center;gap:14px;padding:14px 18px;border-radius:15px;background:var(--card);border:1px solid var(--line)}
.row.me{background:rgba(37,99,235,.15);border-color:rgba(96,165,250,.5)}
.row .rank{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;font-family:var(--f-head);font-weight:800;
  background:rgba(255,255,255,.08);border:1px solid var(--line2)}
.row .rank.g1{background:linear-gradient(135deg,#fbbf24,#d97706);color:#1a1204;border-color:transparent}
.row .rank.g2{background:linear-gradient(135deg,#e2e8f0,#94a3b8);color:#0f172a;border-color:transparent}
.row .rank.g3{background:linear-gradient(135deg,#d9925c,#b45309);color:#1a1204;border-color:transparent}
.row .who{flex:1;min-width:0}
.row .who b{display:block;font-family:var(--f-head);font-size:16px}
.row .who small{color:var(--muted);font-size:12px}
.row .pts{font-family:var(--f-head);font-weight:800;font-size:20px;color:var(--gold-2);white-space:nowrap}
.empty{padding:34px;border-radius:var(--r);border:1px dashed var(--line2);text-align:center;color:var(--muted)}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:60;overflow:hidden}
.confetti i{position:absolute;top:-14px;width:9px;height:15px;border-radius:2px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(105vh) rotate(560deg);opacity:.15}}

/* ---------- toast / animation / responsive ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.toast{
  position:fixed;inset-inline:0;bottom:26px;margin:auto;width:max-content;max-width:88vw;z-index:70;
  padding:13px 20px;border-radius:14px;background:rgba(15,23,42,.96);border:1px solid var(--line2);
  box-shadow:var(--shadow);font-weight:700;font-size:14.5px;opacity:0;transform:translateY(16px);
  transition:.3s;pointer-events:none
}
.toast.show{opacity:1;transform:none}
.footer-note{margin-top:34px;text-align:center;color:var(--muted);font-size:12.5px}
.footer-note a{color:#a5b4fc}
@media (max-width:700px){
  .app{padding:0 14px 48px}
  .topbar{margin:0 -14px 20px;padding:10px 14px}
  .brand-txt small{display:none}
  .ghost span{display:none}
  .ghost{padding:9px 12px}
  .card{padding:18px}
  .qcard{padding:22px 18px}
  .answers{grid-template-columns:1fr}
  .ring{width:160px;height:160px}
  .result-hero{padding:24px 16px}
  .hero{padding:6px 0 22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* ---------- install / offline bar ---------- */
.btn.small{padding:9px 16px;font-size:14px;border-radius:12px}
.installbar{
  position:fixed;inset-inline:14px;bottom:14px;z-index:60;margin:auto;max-width:620px;
  display:flex;align-items:center;gap:12px;justify-content:space-between;
  padding:11px 14px;border-radius:16px;background:rgba(15,23,42,.94);
  border:1px solid var(--line2);box-shadow:var(--shadow);backdrop-filter:blur(14px);
  animation:fadeUp .4s ease both
}
.installbar[hidden]{display:none}
.ib-txt{font-size:13.5px;font-weight:600;color:var(--txt2);line-height:1.5}
.ib-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.ib-actions .ghost.icon-only{padding:7px}
.ib-actions .ic{width:17px;height:17px}
body.ib-on .toast{bottom:104px}
@media (max-width:520px){
  .installbar{flex-direction:column;align-items:stretch;text-align:center}
  .ib-actions{justify-content:center}
}