.brain-shell{max-width:760px;margin:auto;padding:0 24px 30px}.brain-shell .topbar{height:88px}.back-link{font-size:.875rem;text-decoration:underline}.brain-heading{padding-top:32px}.brain-heading h1{font-size:clamp(3.5rem,12vw,5.5rem);margin:15px 0}.brain-heading p,.brain-card p{line-height:1.65}.brain-heading .mini-label{font-size:.875rem;letter-spacing:1px}.brain-shell .mode-switch{margin-top:26px}.brain-shell .mode-switch button{min-height:48px}.brain-card{padding:28px;border:1px solid var(--border);border-radius:20px;background:var(--surface)}.brain-stats{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.875rem}.brain-stats strong{display:block;font-size:1.8rem;color:var(--lime)}.brain-card progress{width:100%;height:7px;margin:22px 0;accent-color:var(--lime)}.brain-card h2{font-size:clamp(1.5rem,5vw,2.3rem);line-height:1.35;white-space:pre-line;overflow-wrap:anywhere}.brain-card .mini-label{font-size:.875rem}.answers{display:grid;grid-template-columns:1fr 1fr;gap:12px}.answers button{min-height:74px;border:1px solid #666b59;border-radius:12px;background:#272b22;font-size:1.65rem}.answers button:hover:not(:disabled){border-color:var(--lime)}.answers button:disabled{opacity:.65}.answers button.correct{background:var(--lime);color:#151714;opacity:1}.answers button.wrong{border:2px solid var(--coral);opacity:1}.brain-card .play-button{width:100%;margin-top:16px;white-space:normal;line-height:1.5}.brain-card .share-button{width:100%;line-height:1.5}.brain-card textarea{width:100%;font:inherit;line-height:1.5;padding:12px;background:#151714;color:var(--ink)}#digits{font-size:clamp(2rem,8vw,3.5rem);font-variant-numeric:tabular-nums;text-align:center;color:var(--lime);padding:20px 0;overflow-wrap:anywhere}#memory{text-align:center}#feedback-text{min-height:1.5em}#mode-note,.brain-foot{font-size:.875rem;line-height:1.6;color:#b7bbaf}#pattern{font-size:1.4rem;letter-spacing:3px;overflow-wrap:anywhere;color:var(--lime)}@media(max-width:420px){.brain-shell{padding:0 16px 24px}.brain-card{padding:20px}.brain-shell .brand{font-size:1.2rem}.brain-heading{padding-top:24px}}