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monospace}[data-theme=dark]{--bg:#0c0c0c;--bg-elevated:#141414;--text:#a3a3a3;--text-muted:#6b6b6b;--text-h:#f2f2f2;--surface:#141414e0;--surface-solid:#141414;--surface-2:#1c1c1c;--border:#ffffff14;--border-strong:#ffffff24;--line:#ffffff0d;--code-bg:#1a1a1a;--accent:#ff6a33;--accent-2:#3db8b8;--accent-hover:#ff8154;--accent-soft:#ff6a331f;--accent-glow:#ff6a3329;--accent-border:#ff6a3359;--cyan-soft:#3db8b81a;--mint:#3db87e;--success:#34d399;--success-soft:#34d3991a;--success-border:#34d39952;--error:#f07178;--error-soft:#f071781a;--error-border:#f0717852;--shadow-xs:0 1px 2px #00000040;--shadow-sm:0 2px 10px #00000047;--shadow:0 8px 28px #00000059;--shadow-lg:0 16px 48px #0000006b;--grid-color:transparent}*,:before,:after{box-sizing:border-box}@keyframes rise{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:200%}to{background-position:-200%}}html{scroll-behavior:smooth}body{min-height:100svh;font:16px/1.6 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var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}.question-card__total{color:var(--text-muted);font-size:.78rem}.question-card__title{font-family:var(--sans);color:var(--text-h);margin:0 0 28px;font-size:1.22rem;font-weight:600;line-height:1.5}.question-card__options{flex-direction:column;gap:10px;display:flex}.option{border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-elevated);width:100%;color:var(--text-h);font:inherit;text-align:left;align-items:center;gap:14px;padding:16px 18px;transition:border-color .2s,background .2s,transform .15s;display:flex}.option:hover:not(:disabled){border-color:var(--border-strong)}.option--selected{border-color:var(--accent);background:var(--accent-soft)}.option--correct{border-color:var(--success-border);background:var(--success-soft)}.option--wrong{border-color:var(--error-border);background:var(--error-soft)}.option__letter{background:var(--code-bg);width:34px;height:34px;font:700 .85rem var(--mono);border-radius:10px;flex-shrink:0;place-items:center;display:grid}.option--selected .option__letter{background:var(--accent);color:#fff}.option--correct .option__letter{background:var(--success);color:#fff}.option--wrong .option__letter{background:var(--error);color:#fff}.option__text{flex:1;line-height:1.45}.option__badge{font-weight:800}.option__badge--ok{color:var(--success)}.option__badge--bad{color:var(--error)}.question-card__feedback{border-radius:var(--radius-sm);margin-top:24px;padding:20px;animation:.4s both rise}.feedback--ok{background:var(--success-soft);border:1px solid var(--success-border)}.feedback--bad{background:var(--error-soft);border:1px solid 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.result-row__icon{color:var(--error)}.quiz-results__actions{flex-wrap:wrap;gap:10px;display:flex}.celebration{border-radius:var(--radius-lg);border:1px solid var(--success-border);background:linear-gradient(120deg, var(--success-soft), var(--accent-soft));margin-bottom:28px;position:relative;overflow:hidden}.celebration__confetti{pointer-events:none;position:absolute;inset:0;overflow:hidden}.confetti-piece{border-radius:2px;animation:linear forwards confetti-fall;position:absolute;top:-10px}@keyframes confetti-fall{to{opacity:0;transform:translateY(200px)rotate(720deg)}}.celebration__banner{text-align:center;padding:32px;position:relative}.celebration__emoji{margin-bottom:8px;font-size:2.8rem;display:block}.celebration__title{font-family:var(--display);color:var(--text-h);margin:0 0 4px;font-size:1.8rem;font-weight:800}.celebration__score{color:var(--text);margin:0;font-weight:600}.quiz-review__list{flex-direction:column;gap:20px;margin:0;padding:0;list-style:none;display:flex}.prep-page{text-align:left}.prep-page__hero{border-bottom:1px solid var(--border);margin-bottom:32px;padding-bottom:28px}.prep-page__stat{font-family:var(--mono);color:var(--text-muted);margin:8px 0 0;font-size:.82rem}.prep-page__intro{max-width:40rem;color:var(--text-muted);margin:12px 0 0;font-size:.95rem;line-height:1.55}.prep-layout{grid-template-columns:220px 1fr;align-items:start;gap:28px;display:grid}.prep-sidebar{position:sticky;top:88px}.prep-sidebar__nav{flex-direction:column;gap:4px;display:flex}.prep-sidebar__btn{border-radius:var(--radius-sm);width:100%;color:var(--text-muted);font:600 .84rem var(--sans);text-align:left;background:0 0;border:1px solid #0000;align-items:center;gap:10px;padding:11px 14px;transition:background .2s,color .2s,border-color 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