/* Brain Power IQ Challenge */
.iqg{
  --iqg-bg1:#0e1a2b; --iqg-bg2:#17365a; --iqg-ink:#f4f1ea; --iqg-mute:#a9b8cc;
  --iqg-amber:#ffb347; --iqg-teal:#2ec4b6; --iqg-coral:#ff6b6b; --iqg-card:rgba(255,255,255,.06); --iqg-line:rgba(255,255,255,.14);
  position:relative; box-sizing:border-box; max-width:780px; margin:24px auto; padding:28px clamp(16px,4vw,40px) 32px;
  color:var(--iqg-ink); font-family:"Space Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif; font-size:16px; line-height:1.5;
  background:radial-gradient(120% 80% at 85% 0%,rgba(46,196,182,.22),transparent 60%),radial-gradient(90% 70% at 0% 100%,rgba(255,107,107,.18),transparent 60%),linear-gradient(160deg,var(--iqg-bg1),var(--iqg-bg2));
  border-radius:24px; box-shadow:0 20px 60px rgba(8,16,30,.35); overflow:hidden; min-height:520px; scroll-margin-top:90px;
}
.iqg *,.iqg *::before,.iqg *::after{box-sizing:border-box}
.iqg h2,.iqg h3,.iqg p{margin:0;padding:0;color:inherit;font-family:inherit;letter-spacing:normal;text-transform:none}
.iqg svg{display:block;width:100%;height:auto;max-width:none}
.iqg button{all:unset;box-sizing:border-box;cursor:pointer;font-family:inherit;-webkit-tap-highlight-color:transparent}
.iqg button:focus-visible,.iqg input:focus-visible,.iqg [tabindex]:focus-visible{outline:3px solid var(--iqg-amber);outline-offset:3px}
.iqg [tabindex="-1"]:focus{outline:none}
.iqg-screen{animation:iqg-in .45s cubic-bezier(.2,.8,.2,1)}
@keyframes iqg-in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* intro */
.iqg-intro{text-align:center}
.iqg-hero{display:flex;justify-content:center;margin:4px 0 14px}
.iqg-orbit{position:relative;width:170px;height:170px;animation:iqg-spin 26s linear infinite}
.iqg-core{position:absolute;inset:50px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:30px;color:#0e1a2b;background:conic-gradient(from 0deg,var(--iqg-amber),var(--iqg-coral),var(--iqg-teal),var(--iqg-amber));box-shadow:0 0 40px rgba(255,179,71,.45);animation:iqg-spin 26s linear infinite reverse}
.iqg-orb{position:absolute;left:50%;top:50%;width:38px;height:38px;margin:-19px;border-radius:50%;display:grid;place-items:center;font-size:15px;font-weight:700;background:rgba(255,255,255,.1);border:1px solid var(--iqg-line);
  transform:rotate(calc(var(--i) * 60deg)) translate(66px) rotate(calc(var(--i) * -60deg))}
.iqg-orb{animation:iqg-pulse 3s ease-in-out infinite;animation-delay:calc(var(--i) * .5s)}
@keyframes iqg-spin{to{transform:rotate(360deg)}}
@keyframes iqg-pulse{50%{background:rgba(255,179,71,.35)}}
.iqg-kicker{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--iqg-teal);font-weight:700;margin-bottom:6px}
.iqg .iqg-kicker{text-transform:uppercase;letter-spacing:.14em}
.iqg-title{font-size:clamp(34px,7vw,52px);line-height:1.02;font-weight:700;margin-bottom:14px}
.iqg-title span{color:var(--iqg-amber)}
.iqg-lead{color:var(--iqg-mute);max-width:520px;margin:0 auto 18px}
.iqg-lead b{color:var(--iqg-ink)}
.iqg-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-bottom:16px}
.iqg-chips span{padding:6px 12px;border-radius:999px;background:var(--iqg-card);border:1px solid var(--iqg-line);font-size:14px}
.iqg-skills{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-width:440px;margin:0 auto 20px}
.iqg-skills span{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:12px;background:rgba(0,0,0,.18);font-size:14px;text-align:left}
.iqg-skills b{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:rgba(46,196,182,.2);color:var(--iqg-teal);font-size:13px;flex:none}
.iqg-name{display:block;max-width:300px;margin:0 auto 18px;text-align:left}
.iqg-name span{display:block;font-size:13px;color:var(--iqg-mute);margin-bottom:4px}
.iqg .iqg-name input{width:100%;margin:0;padding:12px 14px;border-radius:12px;border:1px solid var(--iqg-line);background:rgba(0,0,0,.25);color:var(--iqg-ink);font:inherit;box-shadow:none}
.iqg .iqg-name input::placeholder{color:#6f8097}
.iqg-best{margin-top:14px;color:var(--iqg-mute)}
.iqg-best b{color:var(--iqg-amber)}
.iqg-fine{margin-top:16px;font-size:12.5px;color:#7f90a6}

/* buttons */
.iqg .iqg-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:14px;font-weight:700;font-size:16px;color:#0e1a2b;background:var(--iqg-amber);box-shadow:0 6px 0 #c9832d,0 10px 24px rgba(255,179,71,.25);transition:transform .12s,box-shadow .12s}
.iqg .iqg-btn:hover{transform:translateY(-2px)}
.iqg .iqg-btn:active{transform:translateY(4px);box-shadow:0 2px 0 #c9832d}
.iqg .iqg-btn--big{font-size:18px;padding:16px 34px}
.iqg .iqg-btn--ghost{background:transparent;color:var(--iqg-ink);border:1.5px solid var(--iqg-line);box-shadow:none}
.iqg .iqg-btn--ghost:hover{border-color:var(--iqg-teal);color:var(--iqg-teal)}
.iqg .iqg-link{color:var(--iqg-mute);font-size:14px;text-decoration:underline;text-underline-offset:3px}
.iqg .iqg-link:hover{color:var(--iqg-ink)}
.iqg .iqg-sound{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--iqg-card);border:1px solid var(--iqg-line);font-size:16px;z-index:2}
.iqg-q .iqg-sound{position:static;flex:none}

/* question */
.iqg-top{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.iqg-count{font-size:14px;color:var(--iqg-mute)}
.iqg-count b{color:var(--iqg-ink);font-size:16px}
.iqg-cat{margin-left:auto;padding:5px 12px;border-radius:999px;background:rgba(46,196,182,.16);color:var(--iqg-teal);font-weight:700;font-size:13px}
.iqg-progress{height:6px;border-radius:6px;background:rgba(255,255,255,.1);overflow:hidden;margin-bottom:22px}
.iqg-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--iqg-teal),var(--iqg-amber));border-radius:6px;transition:width .4s}
.iqg-qhead{display:flex;align-items:flex-start;gap:16px;margin-bottom:18px}
.iqg-prompt{flex:1;font-size:clamp(19px,3.2vw,23px);font-weight:700;line-height:1.3}
.iqg-timer{position:relative;width:52px;height:52px;flex:none}
.iqg-timer svg{transform:rotate(-90deg)}
.iqg-tbg{fill:none;stroke:rgba(255,255,255,.12);stroke-width:4}
.iqg-tfg{fill:none;stroke:var(--iqg-teal);stroke-width:4;stroke-linecap:round;transition:stroke .3s}
.iqg-timer span{position:absolute;inset:0;display:grid;place-items:center;font-weight:700;font-size:15px}
.iqg-timer.is-low .iqg-tfg{stroke:var(--iqg-coral)}
.iqg-timer.is-low span{color:var(--iqg-coral);animation:iqg-beat 1s infinite}
@keyframes iqg-beat{50%{transform:scale(1.15)}}
.iqg-stem{margin-bottom:20px}
.iqg-opts{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.iqg .iqg-opt{position:relative;display:flex;align-items:center;gap:12px;min-height:60px;padding:14px 16px;border-radius:16px;background:var(--iqg-card);border:1.5px solid var(--iqg-line);font-size:17px;font-weight:500;color:var(--iqg-ink);transition:transform .12s,border-color .15s,background .15s}
.iqg .iqg-opt:hover{border-color:var(--iqg-teal);background:rgba(46,196,182,.1);transform:translateY(-2px)}
.iqg .iqg-opt.is-picked{border-color:var(--iqg-amber);background:rgba(255,179,71,.2);animation:iqg-pop .35s}
.iqg .iqg-opt[disabled]{cursor:default}
@keyframes iqg-pop{40%{transform:scale(1.04)}}
.iqg-key{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;flex:none;background:rgba(255,255,255,.1);font-size:13px;font-weight:700;color:var(--iqg-mute)}
.iqg-opt-body{flex:1;min-width:0}
.iqg-opts--vis{grid-template-columns:repeat(4,1fr)}
.iqg .iqg-opt--vis{flex-direction:column;padding:10px;gap:6px;color:var(--iqg-ink)}
.iqg .iqg-opt--vis .iqg-key{align-self:flex-start;width:24px;height:24px;font-size:12px}
.iqg .iqg-opt--vis .iqg-opt-body{width:100%;max-width:120px}
.iqg-foot{display:flex;justify-content:space-between;align-items:center;margin-top:18px;font-size:13px;color:var(--iqg-mute)}
.iqg-dots{color:var(--iqg-amber);letter-spacing:2px}
.iqg-dots i{font-style:normal;color:rgba(255,255,255,.18);margin-right:6px}

/* matrix */
.iqg-matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-width:330px;margin:0 auto;padding:10px;border-radius:18px;background:rgba(0,0,0,.22)}
.iqg-mcell{aspect-ratio:1;border-radius:12px;background:rgba(255,255,255,.05);padding:6px;display:grid;place-items:center}
.iqg-mcell--q{border:2px dashed var(--iqg-amber);color:var(--iqg-amber);font-size:34px;font-weight:700;animation:iqg-pulse2 1.8s infinite}
@keyframes iqg-pulse2{50%{background:rgba(255,179,71,.12)}}

/* sequences */
.iqg-seq{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
.iqg-seq span{min-width:56px;padding:12px 10px;border-radius:12px;background:rgba(0,0,0,.25);border:1px solid var(--iqg-line);text-align:center;font-size:22px;font-weight:700}
.iqg-seq .iqg-seq-q{border:2px dashed var(--iqg-amber);color:var(--iqg-amber)}

/* poly */
.iqg-poly-src{display:flex;align-items:center;justify-content:center;gap:12px;color:var(--iqg-amber);font-weight:700}
.iqg-poly-src svg{width:120px;padding:8px;border-radius:14px;background:rgba(0,0,0,.25)}

/* memory */
.iqg-mem{display:flex;justify-content:center;margin:26px 0 22px}
.iqg-mem-digits{font-size:clamp(42px,10vw,64px);font-weight:700;letter-spacing:.12em;color:var(--iqg-amber);text-shadow:0 0 30px rgba(255,179,71,.4)}
.iqg-mem-grid{width:220px}
.iqg-mem-words{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;width:100%}
.iqg-mem-words span{padding:10px 6px;border-radius:10px;background:rgba(0,0,0,.25);text-align:center;font-weight:700}
.iqg-membar{height:8px;border-radius:8px;background:rgba(255,255,255,.1);overflow:hidden;margin-bottom:18px}
.iqg-membar i{display:block;height:100%;background:var(--iqg-amber);animation:iqg-drain linear forwards}
@keyframes iqg-drain{from{width:100%}to{width:0}}
.iqg-center{text-align:center}

/* results */
.iqg-res{text-align:center}
.iqg-gauge{position:relative;max-width:320px;margin:6px auto 4px}
.iqg-gbg{fill:none;stroke:rgba(255,255,255,.1);stroke-width:14;stroke-linecap:round}
.iqg-gfg{fill:none;stroke:url(#iqg-g);stroke-width:14;stroke-linecap:round;transition:stroke-dashoffset 1.6s cubic-bezier(.2,.8,.2,1)}
.iqg-gtick{fill:#7f90a6;font-size:10px;font-family:inherit}
.iqg-iq{position:absolute;left:0;right:0;bottom:6px}
.iqg-iq b{font-size:clamp(54px,12vw,74px);font-weight:700;line-height:1}
.iqg-tier{font-size:clamp(22px,4vw,28px);font-weight:700;color:var(--iqg-amber);margin:8px 0 6px}
.iqg-newbest{display:inline-block;padding:4px 12px;border-radius:999px;background:rgba(46,196,182,.18);color:var(--iqg-teal);font-weight:700;font-size:14px;margin-bottom:8px}
.iqg-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:6px 0 20px}
.iqg-stats div{padding:12px 8px;border-radius:14px;background:var(--iqg-card);border:1px solid var(--iqg-line)}
.iqg-stats b{display:block;font-size:20px}
.iqg-stats span{font-size:12.5px;color:var(--iqg-mute)}
.iqg-bars{display:grid;gap:10px;max-width:520px;margin:0 auto 22px;text-align:left}
.iqg-bar{display:grid;grid-template-columns:110px 1fr 38px;align-items:center;gap:10px;font-size:14px}
.iqg-bar-t{height:10px;border-radius:10px;background:rgba(255,255,255,.1);overflow:hidden}
.iqg-bar-t i{display:block;height:100%;width:0;border-radius:10px;background:linear-gradient(90deg,var(--iqg-teal),var(--iqg-amber));transition:width 1.2s cubic-bezier(.2,.8,.2,1) .3s}
.iqg-bar-t i.is-on{width:var(--w)}
.iqg-bar-v{text-align:right;color:var(--iqg-mute)}
.iqg-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
.iqg-toast{min-height:20px;margin-top:12px;color:var(--iqg-teal);font-size:14px;opacity:0;transition:opacity .3s;word-break:break-word}
.iqg-toast.is-on{opacity:1}
.iqg-confetti{position:absolute;inset:0;pointer-events:none;z-index:5}

/* review */
.iqg-review-top{display:flex;align-items:center;gap:16px;margin-bottom:16px}
.iqg-review-top h3{font-size:22px;font-weight:700}
.iqg .iqg-rv-list{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:12px}
.iqg .iqg-rv{margin:0;padding:16px;border-radius:16px;background:var(--iqg-card);border:1px solid var(--iqg-line);border-left:4px solid var(--iqg-teal)}
.iqg .iqg-rv.is-bad{border-left-color:var(--iqg-coral)}
.iqg-rv-h{display:flex;align-items:center;gap:10px;margin-bottom:6px;font-size:13px}
.iqg-rv-n{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:rgba(255,255,255,.1);font-weight:700}
.iqg-rv-c{color:var(--iqg-mute)}
.iqg-rv-mark{margin-left:auto;font-weight:700;color:var(--iqg-teal)}
.is-bad .iqg-rv-mark{color:var(--iqg-coral)}
.iqg-rv-p{font-weight:700;margin-bottom:8px}
.iqg-rv-stem{margin-bottom:10px;transform-origin:left top}
.iqg-rv-stem .iqg-matrix{max-width:200px;margin:0;padding:6px;gap:5px}
.iqg-rv-stem .iqg-seq{justify-content:flex-start}
.iqg-rv-stem .iqg-seq span{min-width:40px;padding:6px;font-size:16px}
.iqg-rv-stem .iqg-mem-digits{font-size:28px}
.iqg-rv-stem .iqg-mem-grid{width:110px}
.iqg-rv-stem .iqg-mem-words span{padding:5px;font-size:13px;font-weight:500}
.iqg-rv-stem .iqg-poly-src{justify-content:flex-start}
.iqg-rv-stem .iqg-poly-src svg{width:80px}
.iqg-rv-ans{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:8px}
.iqg-rv-ans small{display:block;font-size:12px;color:var(--iqg-mute);margin-bottom:2px}
.iqg-rv-opt{font-weight:700}
.iqg-rv-opt.is-vis{display:block;width:72px;padding:4px;border-radius:10px;background:rgba(0,0,0,.25)}
.iqg-rv-ex{font-size:14px;color:var(--iqg-mute)}

/* mobile */
@media (max-width:560px){
  .iqg{border-radius:18px;margin:12px auto;padding-top:22px}
  .iqg-opts{grid-template-columns:1fr}
  .iqg-opts--vis{grid-template-columns:1fr 1fr}
  .iqg .iqg-opt--vis .iqg-opt-body{max-width:110px}
  .iqg-skills{grid-template-columns:1fr 1fr}
  .iqg-mem-words{grid-template-columns:repeat(2,1fr)}
  .iqg-bar{grid-template-columns:92px 1fr 34px;font-size:13px}
  .iqg-stats b{font-size:17px}
  .iqg-actions .iqg-btn{flex:1 1 100%}
}
@media (prefers-reduced-motion:reduce){
  .iqg *{animation:none!important;transition:none!important}
}