*{box-sizing:border-box}
:root{
  --bg:#090b12;
  --card:rgba(17,21,33,.92);
  --card2:rgba(255,255,255,.055);
  --text:#f7f8fb;
  --muted:#aeb6c7;
  --line:rgba(255,255,255,.10);
  --accent:#7c5cff;
  --accent2:#20d7ae;
  --danger:#ff7182;
}
html,body{min-height:100%}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 15% 15%,rgba(124,92,255,.23),transparent 28%),
    radial-gradient(circle at 85% 85%,rgba(32,215,174,.13),transparent 27%),
    var(--bg);
}
button,a{font:inherit}
.page-shell{min-height:100vh;display:grid;place-items:center;padding:24px}
.challenge-card{
  width:min(730px,100%);
  padding:28px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:24px;
  box-shadow:0 28px 90px rgba(0,0,0,.5);
  backdrop-filter:blur(14px);
}
.top-row{display:flex;gap:20px;justify-content:space-between;align-items:flex-start}
.eyebrow{margin-bottom:8px;font-size:12px;letter-spacing:.14em;font-weight:900;color:#bdb3ff}
h1{margin:0;font-size:clamp(27px,5vw,40px);line-height:1.08}
.counter{
  flex:0 0 auto;padding:9px 12px;border:1px solid var(--line);border-radius:999px;
  color:var(--muted);background:rgba(255,255,255,.04);font-weight:800
}
.progress{height:9px;margin:24px 0 28px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden}
.progress-bar{
  height:100%;width:20%;border-radius:inherit;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  transition:width .2s ease
}
.question-number{color:var(--muted);font-size:14px;font-weight:800;margin-bottom:8px}
.question-title{margin:0 0 20px;font-size:23px;line-height:1.35}
.options{display:grid;gap:12px}
.option{
  display:flex;gap:12px;align-items:center;width:100%;padding:16px;border:1px solid var(--line);
  border-radius:16px;background:var(--card2);color:var(--text);cursor:pointer;
  transition:transform .15s ease,border-color .15s ease,background .15s ease
}
.option:hover{transform:translateY(-1px);border-color:rgba(124,92,255,.55)}
.option.selected{border-color:var(--accent);background:rgba(124,92,255,.15)}
.option-badge{
  display:grid;place-items:center;width:34px;height:34px;flex:0 0 34px;
  border-radius:10px;background:rgba(255,255,255,.08);font-weight:900
}
.option-text{text-align:left;line-height:1.35}
.primary-btn{
  display:block;width:100%;margin-top:22px;padding:15px 18px;border:0;border-radius:15px;
  background:linear-gradient(90deg,var(--accent),#5e76ff);color:#fff;font-weight:900;
  cursor:pointer;text-align:center;text-decoration:none;box-shadow:0 14px 32px rgba(92,93,255,.25)
}
.primary-btn:disabled{cursor:not-allowed;opacity:.45;box-shadow:none}
.primary-btn:not(:disabled):hover{filter:brightness(1.06)}
.message{min-height:22px;margin-top:14px;color:var(--danger);font-size:14px;font-weight:800}
.center-state{text-align:center}
.center-state .muted{max-width:500px;margin:16px auto 0}
.big-icon{font-size:58px;margin-bottom:18px}
.muted{color:var(--muted);line-height:1.65}
.result-card{max-width:630px}
.link-btn{margin-top:24px}
.tiny-note{margin:13px 0 0;color:#7f899c;font-size:12px;line-height:1.5}
@media(max-width:560px){
  .page-shell{padding:14px}
  .challenge-card{padding:20px;border-radius:20px}
  .top-row{gap:12px}
  .counter{font-size:13px}
  .question-title{font-size:20px}
}