:root{
  --bg:#0b0e18;--surface:#151926;--surface2:#1d2232;--surface3:#262c3e;
  --border:#343b51;--text:#f7f6f2;--muted:#a7abb9;--muted2:#7d8395;
  --coral:#ff493d;--coral2:#ff6a61;--violet:#aa9cff;--green:#39c997;--red:#ff666d;
  --shadow:0 24px 70px rgba(0,0,0,.35);--radius:16px;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color-scheme:dark
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{min-height:100vh;margin:0;color:var(--text);background:
  radial-gradient(circle at 12% -8%,rgba(101,81,209,.20),transparent 34%),
  radial-gradient(circle at 92% 8%,rgba(28,75,138,.18),transparent 30%),var(--bg)}
button,input{font:inherit}
button,a{touch-action:manipulation}
a{color:inherit}
.skip-link{position:fixed;left:12px;top:-60px;z-index:999;padding:10px 14px;border-radius:8px;background:#fff;color:#111}
.skip-link:focus{top:12px}
.shell{width:min(100%,980px);margin:0 auto;padding:18px 28px 52px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px}
.brand{display:inline-flex;align-items:center;gap:10px;border:0;background:transparent;color:var(--text);font-weight:850;letter-spacing:.07em;cursor:pointer}
.brand svg{width:27px;height:27px;fill:none;stroke:var(--coral);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.pilot{padding:3px 8px;border:1px solid rgba(170,156,255,.55);border-radius:999px;color:var(--violet);font-size:.63rem;letter-spacing:.11em}
.alert-link{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:8px 13px;border:1px solid var(--border);border-radius:9px;text-decoration:none;color:#d8dae2;font-size:.8rem;font-weight:780}
.alert-link:hover{background:rgba(255,255,255,.04);border-color:#505870}
.view{display:none}.view.active{display:block;animation:fade .22s ease both}
@keyframes fade{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.card{margin:7px auto 0;padding:30px;border:1px solid var(--border);border-radius:var(--radius);
  background:linear-gradient(145deg,rgba(29,34,50,.98),rgba(13,17,29,.98));box-shadow:var(--shadow)}
.home-card{padding:28px 30px 30px}
.eyebrow,.mode-number,.meta,.label,.benchmark-label{margin:0;color:var(--violet);font-size:.75rem;font-weight:850;letter-spacing:.11em;text-transform:uppercase}
.brand-descriptor{color:var(--coral)}
h1{max-width:800px;margin:9px 0 8px;font-size:clamp(2.5rem,7vw,4.7rem);line-height:.96;letter-spacing:-.052em}
.tagline{margin:14px 0 0;color:#d8d4ff;font-weight:740}
.hero-copy{max-width:650px;margin:16px 0 22px;color:var(--muted);font-size:1.03rem;line-height:1.58}
.mode-fieldset{margin:0 0 24px;padding:0;border:0}
.mode-fieldset legend{margin-bottom:10px;font-weight:790}
.mode-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}
.mode-card{display:grid;grid-template-columns:auto 1fr;grid-template-areas:"number number" "icon title" "icon copy";gap:4px 13px;min-height:132px;padding:16px;border:1px solid transparent;border-radius:11px;background:var(--surface2);color:var(--text);text-align:left;cursor:pointer;transition:.15s}
.mode-card.wide{grid-column:1/-1;min-height:108px}
.mode-card:hover{transform:translateY(-2px);background:var(--surface3)}
.mode-card.selected{border-color:var(--violet);box-shadow:inset 0 0 0 1px rgba(170,156,255,.18)}
.mode-number{grid-area:number;color:var(--coral)}
.mode-icon{grid-area:icon;display:grid;place-items:center;width:44px;height:44px;color:var(--coral)}
.mode-icon svg{width:37px;height:37px;fill:none;stroke:currentColor;stroke-width:1.55;stroke-linecap:round;stroke-linejoin:round}
.score-icon{width:43px;height:31px;margin-top:7px;border:2px solid var(--coral);border-radius:5px;font-weight:900;letter-spacing:-.06em}
.mode-title{grid-area:title;align-self:end;font-size:1.08rem;font-weight:820}
.mode-copy{grid-area:copy;color:var(--muted);font-size:.89rem;line-height:1.42}
.start-panel{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end;margin-top:8px}
.field-label{display:block;margin:0 0 7px;color:#d9dae1;font-size:.77rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}
input{width:100%;height:48px;padding:0 14px;border:1px solid #444c62;border-radius:9px;outline:none;background:rgba(13,17,29,.76);color:var(--text)}
input:focus{border-color:var(--violet);box-shadow:0 0 0 3px rgba(170,156,255,.13)}
input::placeholder{color:#737a8d}
.primary,.secondary,.text-button,.icon-button{border-radius:9px;cursor:pointer}
.primary{min-height:48px;padding:12px 20px;border:0;background:linear-gradient(135deg,var(--coral),var(--coral2));color:#fff;font-weight:850;box-shadow:0 10px 25px rgba(255,73,61,.17)}
.primary:hover:not(:disabled){filter:brightness(1.05);transform:translateY(-1px)}
.primary:disabled{cursor:not-allowed;opacity:.42;box-shadow:none}
.start-button{min-width:190px}
.privacy{margin:10px 0 0;color:var(--muted2);font-size:.75rem;line-height:1.45}
.form-error{min-height:20px;margin:4px 0 0;color:#ff8c91;font-size:.82rem}
.alert-panel{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:20px;padding:15px;border:1px solid var(--border);border-radius:11px;background:rgba(170,156,255,.06)}
.alert-panel p{margin:0;color:#d0d2dc;line-height:1.42}
.alert-panel a{flex:0 0 auto}
.intro-card{max-width:700px}.intro-card h2,.details-card h2{margin:9px 0 18px;font-size:clamp(1.85rem,5vw,2.7rem)}
.rule-list{display:grid;gap:10px;margin:23px 0 25px}
.rule{display:grid;grid-template-columns:62px 1fr;align-items:center;gap:14px;padding:14px;border:1px solid var(--border);border-radius:11px;background:var(--surface2)}
.rule-badge{display:grid;place-items:center;min-height:40px;border:1px solid rgba(255,73,61,.67);border-radius:8px;color:var(--coral);font-size:.75rem;font-weight:900}
.rule p{margin:0;color:#d7d8df;line-height:1.45}
.quiz-card{max-width:790px}
.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.counter{color:var(--coral);font-weight:850}.timer{min-width:55px;margin-left:12px;color:#d9dae1;font-variant-numeric:tabular-nums;font-weight:800}
.dots{display:flex;gap:7px}.dot{width:9px;height:9px;border-radius:50%;background:#4b5266}.dot.current{background:var(--coral)}.dot.done{background:var(--violet)}
.timer-track{height:4px;margin:14px 0 28px;overflow:hidden;border-radius:99px;background:#363d51}
.timer-fill{height:100%;width:100%;background:var(--coral);transition:width 1s linear,background .2s}
.question-text{max-width:730px;margin:9px 0 24px;font-size:clamp(1.65rem,5vw,2.4rem);line-height:1.18;letter-spacing:-.026em}
.label{display:inline-block;margin:0 0 2px;padding:5px 8px;border:1px solid rgba(170,156,255,.45);border-radius:6px}
.answers{display:grid;gap:11px}
.answer{display:grid;grid-template-columns:43px 1fr;align-items:center;min-height:70px;padding:10px 14px;border:1px solid transparent;border-radius:11px;background:var(--surface2);color:var(--text);text-align:left;cursor:pointer}
.answer:hover:not(:disabled){transform:translateY(-1px);border-color:#4a5269;background:var(--surface3)}
.answer:disabled{cursor:default}.answer.correct{border-color:rgba(57,201,151,.78);background:rgba(57,201,151,.11)}.answer.incorrect{border-color:rgba(255,102,109,.78);background:rgba(255,102,109,.11)}
.letter{display:grid;place-items:center;width:32px;height:38px;border:1px solid #50586e;border-radius:7px;font-weight:850}.answer-text{font-size:1.04rem;font-weight:730}
.feedback{margin-top:14px;padding:13px 15px;border-left:4px solid var(--violet);border-radius:8px;background:rgba(170,156,255,.075)}
.feedback.correct{border-left-color:var(--green)}.feedback.incorrect{border-left-color:var(--red)}.feedback p{margin:5px 0 0;color:#c9cbd4;line-height:1.48}
.next{width:100%;margin-top:17px}.quiz-note{margin:12px 0 0;color:var(--muted2);font-size:.75rem;text-align:center}
.result-card{max-width:650px;text-align:center}.score{margin:4px 0 0;font-size:clamp(4.8rem,15vw,7.2rem);line-height:1;letter-spacing:-.06em}
.player-result{margin:6px 0;color:#d9d9e2;font-weight:750}.completion{margin:8px 0 22px;color:var(--muted)}
.benchmark{margin:0 0 18px;padding:25px 22px;border:1px solid var(--border);border-radius:12px;background:var(--surface2)}
.benchmark h3{margin:10px 0 20px;font-size:1.25rem}.benchmark-track{height:12px;overflow:hidden;border-radius:99px;background:#3f4659}.benchmark-fill{height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,var(--coral),var(--coral2));transition:width .6s}
.benchmark-detail{margin:15px 0 0;color:var(--muted);font-size:.83rem}
.secondary{width:100%;min-height:48px;margin-bottom:11px;border:1px solid #434b61;background:transparent;color:var(--text);font-weight:800}.secondary:hover{background:rgba(255,255,255,.035)}
.result-card .primary{width:100%}.text-button{display:block;margin:13px auto 0;padding:8px 12px;border:0;background:transparent;color:var(--muted)}.text-button:hover{color:var(--text)}
.result-alert{margin-top:22px}
.details-card{max-width:870px}.details-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.icon-button{width:39px;height:39px;border:0;background:var(--surface2);color:var(--text);font-size:1.65rem}
.details-list{display:grid;gap:12px;margin:8px 0 22px}.detail{padding:15px;border:1px solid var(--border);border-radius:11px;background:var(--surface2)}.detail.correct{border-left:4px solid var(--green)}.detail.incorrect{border-left:4px solid var(--red)}
.detail-index{margin:0 0 6px;color:var(--violet);font-size:.71rem;font-weight:850;letter-spacing:.09em;text-transform:uppercase}.detail-question{margin:0 0 10px;font-weight:780;line-height:1.42}.detail-answer{margin:4px 0;color:#d2d4dc}.detail-explanation{margin:10px 0 0;color:var(--muted);line-height:1.46}
.details-card .primary{width:100%}
.footer{margin:29px auto 0;padding:20px 7px 0;border-top:1px solid rgba(255,255,255,.08);color:var(--muted2);font-size:.72rem;line-height:1.5;text-align:center}
.footer p{margin:4px 0}.footer a{color:#aaa4db}
.hidden{display:none!important}
@media(max-width:700px){
  .shell{padding:12px 14px 36px}.topbar{align-items:flex-start}.topbar .alert-link{font-size:.7rem;padding:7px 9px}
  .card,.home-card{padding:21px 17px}.mode-grid{grid-template-columns:1fr}.mode-card.wide{grid-column:auto}
  .start-panel{grid-template-columns:1fr}.start-button{width:100%}.alert-panel{align-items:flex-start;flex-direction:column}.alert-panel a{width:100%}
  .quiz-top{align-items:flex-start;flex-direction:column}.dots{flex-wrap:wrap}.answer{grid-template-columns:40px 1fr;min-height:64px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}