.tab-bar[data-astro-cid-4srb4oaq]{display:flex;gap:4px;margin-bottom:12px}.tab-bar[data-astro-cid-4srb4oaq] button[data-astro-cid-4srb4oaq]{padding:10px 28px;border:2px solid #444;background:transparent;color:#888;border-radius:10px 10px 0 0;font-size:1rem;cursor:pointer;transition:all .2s}.tab-bar[data-astro-cid-4srb4oaq] button[data-astro-cid-4srb4oaq].active{background:#16213e;color:#fff;border-color:#e94560}.section[data-astro-cid-4srb4oaq]{display:none;width:100%}.section[data-astro-cid-4srb4oaq].active{display:flex;flex-direction:column;align-items:center;gap:16px}.learn-step[data-astro-cid-4srb4oaq]{display:none}.learn-step[data-astro-cid-4srb4oaq].active{display:block}.step-nav[data-astro-cid-4srb4oaq]{display:flex;gap:12px;align-items:center}.step-nav[data-astro-cid-4srb4oaq] button[data-astro-cid-4srb4oaq],.check-btn[data-astro-cid-4srb4oaq]{padding:10px 22px;border-radius:10px;font-size:1rem;cursor:pointer;border:2px solid #e94560;background:transparent;color:#e94560}.step-nav[data-astro-cid-4srb4oaq] button[data-astro-cid-4srb4oaq]:hover,.check-btn[data-astro-cid-4srb4oaq]:hover{background:#e94560;color:#fff}.feedback[data-astro-cid-4srb4oaq]{min-height:1.5em;font-size:1.15rem;font-weight:700;text-align:center}.feedback[data-astro-cid-4srb4oaq].correct{color:#4ecdc4}.feedback[data-astro-cid-4srb4oaq].wrong{color:#ffd166}.insight[data-astro-cid-4srb4oaq]{margin-top:12px;padding:16px 28px;background:linear-gradient(135deg,#0f3460,#16213e);border-left:4px solid #4ecdc4;border-radius:8px;color:#4ecdc4;font-size:1.1rem;text-align:center;max-width:520px}.question-card[data-astro-cid-4srb4oaq]{background:#16213e;border:1px solid #2d4371;border-radius:14px;padding:16px 24px;color:#eef2ff;font-size:1.1rem;text-align:center;width:100%;max-width:620px}.option-grid[data-astro-cid-4srb4oaq]{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;width:100%;max-width:620px}.option-grid .option-btn{flex:1 1 220px;min-height:56px;padding:12px 20px;border:2px solid #2d4371;background:#16213e;color:#eef2ff;border-radius:12px;font-size:1.05rem;font-weight:700;cursor:pointer;transition:all .15s;text-align:center}.option-grid .option-btn:hover:not(:disabled){border-color:#e94560;color:#e94560}.option-grid .option-btn.active{border-color:#4ecdc4;background:#0f3460;color:#4ecdc4;font-weight:700}.option-grid .option-btn.wrong{border-color:#e94560;background:#341b2e;color:#ffd7df}.option-grid .option-btn:disabled{cursor:default;opacity:.75}.option-grid .option-btn:disabled.active,.option-grid .option-btn:disabled.wrong{opacity:1}.score-bar[data-astro-cid-4srb4oaq]{display:flex;justify-content:space-between;width:100%;max-width:620px;color:#8d99b8;font-size:.95rem}.score-bar[data-astro-cid-4srb4oaq] .correct[data-astro-cid-4srb4oaq]{color:#4ecdc4;font-weight:700}@media(max-width:600px){.controls[data-astro-cid-4srb4oaq]{flex-direction:column;gap:8px;align-items:stretch}.controls[data-astro-cid-4srb4oaq] label[data-astro-cid-4srb4oaq]{text-align:center;font-size:.9rem}.controls[data-astro-cid-4srb4oaq] input[data-astro-cid-4srb4oaq][type=range]{width:100%}.controls[data-astro-cid-4srb4oaq] .value[data-astro-cid-4srb4oaq]{text-align:center;font-size:1.2rem}.tab-bar[data-astro-cid-4srb4oaq]{gap:2px}.tab-bar[data-astro-cid-4srb4oaq] button[data-astro-cid-4srb4oaq]{padding:8px 12px;font-size:.85rem}.mode-toggle[data-astro-cid-4srb4oaq] button[data-astro-cid-4srb4oaq]{padding:6px 14px;font-size:.9rem}.challenge-prompt[data-astro-cid-4srb4oaq]{font-size:1.05rem;padding:12px 14px}.challenge-prompt[data-astro-cid-4srb4oaq] strong[data-astro-cid-4srb4oaq]{font-size:1.15rem}.step-nav[data-astro-cid-4srb4oaq]{gap:8px}.step-nav[data-astro-cid-4srb4oaq] button[data-astro-cid-4srb4oaq]{padding:8px 14px;font-size:.85rem}.fraction-label[data-astro-cid-4srb4oaq]{font-size:1.8rem}.score-bar[data-astro-cid-4srb4oaq]{flex-wrap:wrap;gap:8px;font-size:.85rem;justify-content:center}.check-btn[data-astro-cid-4srb4oaq]{padding:10px 28px;font-size:1rem}.explanation[data-astro-cid-4srb4oaq]{font-size:.95rem}.feedback[data-astro-cid-4srb4oaq]{font-size:1rem}.insight[data-astro-cid-4srb4oaq]{font-size:.95rem;padding:12px 16px}.learn-text[data-astro-cid-4srb4oaq]{font-size:1rem}.canvas-wrapper[data-astro-cid-4srb4oaq]{border-radius:12px}}