:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0a0a0a;color:#fafafa}.shell{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:1.5rem;gap:1.25rem}h1{margin:0;font-size:1.75rem;font-weight:700;letter-spacing:-.03em}.difficulty-bar{display:flex;gap:.5rem}.score-bar{display:flex;gap:2rem;font-size:.9rem;color:#ffffff8c}.score-bar span{font-weight:700;color:#fafafa}.boards{display:flex;gap:2.5rem;flex-wrap:wrap;justify-content:center}.board-label{text-align:center;font-size:.75rem;text-transform:uppercase;letter-spacing:.18em;color:#ffffff59;margin-bottom:.5rem}.board{display:grid;gap:3px}.cell{display:grid;place-items:center;border-radius:.5rem;background:#ffffff0a;border:2px solid transparent;cursor:default;-webkit-user-select:none;user-select:none;transition:background .15s,border-color .15s,transform .15s}.board-right .cell{cursor:pointer}.board-right .cell:hover{background:#ffffff14}.cell.found{border-color:#22c55e;background:#22c55e26;animation:pop .3s ease}.cell.wrong{border-color:#ef4444;background:#ef44441f;animation:shake .35s ease}@keyframes pop{0%{transform:scale(1)}50%{transform:scale(1.15)}to{transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}.win-banner{padding:1rem 2rem;border-radius:.75rem;background:#22c55e26;border:1px solid rgba(34,197,94,.3);font-size:1.05rem;font-weight:600;color:#22c55e;text-align:center;animation:fadeIn .4s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.btn{padding:.5rem 1.25rem;border-radius:.5rem;border:1px solid rgba(255,255,255,.12);background:#ffffff0d;color:#ffffffbf;font-size:.85rem;cursor:pointer;transition:background .15s,border-color .15s,color .15s;text-transform:capitalize}.btn:hover{background:#ffffff1a;color:#fafafa}.btn-active{background:#6366f133;border-color:#6366f180;color:#a5b4fc}.hint{font-size:.78rem;color:#ffffff4d}