.cell-notes{position:absolute;top:0;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);padding:2px;pointer-events:none;z-index:1}.note{display:flex;align-items:center;justify-content:center;font-size:.6rem;font-weight:500;color:var(--color-notes-text, #666);line-height:1}.cell{background-color:var(--color-cell-background, white);background-image:var(--cell-sheen, linear-gradient(180deg, rgba(255, 255, 255, .1), rgba(0, 0, 0, .025)));box-shadow:var(--cell-bevel, inset 0 1px 0 rgba(255, 255, 255, .45), inset 0 -2px 3px rgba(0, 0, 0, .035));display:flex;align-items:center;justify-content:center;font-size:clamp(16px,4vw,24px);font-weight:600;color:var(--color-text-primary, #333);cursor:pointer;transition:all var(--animation-duration, .2s) var(--animation-easing, ease);-webkit-user-select:none;user-select:none;outline:none;min-height:0;aspect-ratio:1;position:relative}.cell-value{z-index:2;position:relative;animation:cell-pop .18s ease-out}.cell-value{color:var(--num-given, var(--color-text-primary, #333));text-shadow:var(--num-glow, none)}.cell:not(.prefilled) .cell-value{color:var(--num-user, var(--color-primary, #4a90e2));font-weight:700}@keyframes cell-pop{0%{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}@media (max-width: 600px){.cell{font-size:clamp(14px,5vw,20px)}}.cell:hover{background-color:var(--color-cell-background-hover, #f0f8ff);transform:scale(var(--animation-scale-hover, 1.05))}.cell.selected{background-color:var(--color-cell-background-selected, #4a90e2);background-image:linear-gradient(180deg,#ffffff38,#0000001f);color:#fff;box-shadow:var(--cell-selected-shadow, inset 0 0 0 2px rgba(255, 255, 255, .5), 0 2px 10px rgba(0, 0, 0, .18));z-index:3}.cell.selected .cell-value{color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.25)}.cell.border-right{border-right:3px solid var(--color-border-box, #333)}.cell.border-bottom{border-bottom:3px solid var(--color-border-box, #333)}.cell:focus{outline:2px solid var(--color-primary, #4a90e2);outline-offset:-2px}.cell.error{background-color:var(--color-cell-background-error, #ffebee);color:var(--color-text-error, #d32f2f);animation:shake .5s ease-in-out}.cell.error .cell-value{color:var(--color-text-error, #d32f2f)}.cell.error.selected{background-color:var(--color-error, #f44336);color:#fff}.cell.prefilled{background-color:var(--color-cell-background-prefilled, #f5f5f5);color:var(--color-text-primary, #333);font-weight:700;cursor:default}.cell.prefilled:hover{background-color:var(--color-cell-background-prefilled, #f5f5f5);transform:none}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-3px)}75%{transform:translate(3px)}}.cell.hint{background-color:var(--color-cell-background-hint, #fff3cd);animation:pulse-hint 1.5s ease-in-out infinite;border:2px solid var(--color-secondary, #ffc107)!important}@keyframes pulse-hint{0%,to{background-color:var(--color-cell-background-hint, #fff3cd);box-shadow:0 0 0 0 var(--color-secondary, rgba(255, 193, 7, .7))}50%{background-color:var(--color-secondary, #ffeaa7);box-shadow:0 0 0 10px transparent}}.cell.highlighted{background-color:var(--color-primary, rgba(74, 144, 226, .2));border:2px solid var(--color-primary, #4a90e2);animation:pulse-highlight 2s ease-in-out infinite}@keyframes pulse-highlight{0%,to{background-color:var(--color-primary, rgba(74, 144, 226, .15))}50%{background-color:var(--color-primary, rgba(74, 144, 226, .3))}}.game-board{display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);gap:1px;background-color:var(--color-board-background, #333);border:3px solid var(--color-border-box, #333);border-radius:var(--effect-border-radius, 12px);overflow:hidden;width:min(450px,90vw);height:min(450px,90vw);margin:0 auto;box-shadow:var(--effect-shadow, 0 10px 30px rgba(0, 0, 0, .2));transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out)}@media (max-width: 600px){.game-board{width:min(350px,95vw);height:min(350px,95vw);border-radius:8px}}.timer{display:flex;align-items:center;gap:.5rem;background:var(--color-background-secondary, rgba(255, 255, 255, .9));padding:.75rem 1rem;border-radius:20px;box-shadow:0 4px 15px #0000001f;border:1px solid var(--color-border-secondary, transparent);font-weight:600;color:var(--color-text-secondary, #333);-webkit-backdrop-filter:blur(var(--effect-blur, 0px));backdrop-filter:blur(var(--effect-blur, 0px))}.timer-icon{color:var(--color-primary, #4a90e2)}.timer-display{font-family:Courier New,monospace;font-size:1.1rem;color:var(--color-primary, #4a90e2)}.number-picker-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease-out}.number-picker{background:#fff;border-radius:20px;padding:2rem;box-shadow:0 20px 40px #0003;max-width:320px;width:90vw;animation:slideUp .3s ease-out}.number-picker-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.number-picker-header h3{margin:0;color:#333;font-size:1.2rem}.close-btn{background:none;border:none;font-size:2rem;color:#666;cursor:pointer;padding:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s ease}.close-btn:hover{background:#f5f5f5;color:#333}.number-wheel{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;margin-bottom:1.5rem}.number-btn{aspect-ratio:1;border:2px solid #e0e0e0;background:#fff;border-radius:50%;font-size:1.5rem;font-weight:600;color:#333;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;min-height:60px}.number-btn:hover{border-color:#4a90e2;background:#f0f8ff;transform:scale(1.05)}.number-btn.selected{background:#4a90e2;border-color:#4a90e2;color:#fff;transform:scale(.95)}.picker-actions{display:flex;justify-content:center}.clear-btn{background:linear-gradient(135deg,#ff6b6b,#ee5a52);color:#fff;border:none;padding:.75rem 2rem;border-radius:25px;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #ff6b6b4d}.clear-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ff6b6b66}@media (max-width: 600px){.number-btn{min-height:70px;font-size:1.8rem}.number-wheel{gap:1rem}}.hint-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:1001;animation:fadeIn .2s ease-out;padding:1rem}.hint-modal{background:var(--color-background-secondary, #ffffff);border-radius:var(--effect-border-radius, 20px);padding:0;box-shadow:var(--effect-shadow-hover, 0 20px 60px rgba(0, 0, 0, .3));-webkit-backdrop-filter:blur(var(--effect-blur, 20px));backdrop-filter:blur(var(--effect-blur, 20px));max-width:500px;width:100%;max-height:80vh;overflow:hidden;animation:slideUp .3s ease-out;border:1px solid var(--color-border-secondary, rgba(255, 255, 255, .2))}.hint-modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;background:var(--color-background-tertiary, rgba(0, 0, 0, .05));border-bottom:1px solid var(--color-border-secondary, #e0e0e0)}.hint-technique{display:flex;align-items:center;gap:1rem}.hint-icon{display:flex;align-items:center;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1))}.hint-technique-info h3{margin:0;color:var(--color-text-primary, #333);font-size:1.3rem;font-weight:700}.hint-difficulty{font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.hint-close-btn{background:none;border:none;font-size:2rem;color:var(--color-text-secondary, #666);cursor:pointer;padding:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out)}.hint-close-btn:hover{background:var(--color-background-tertiary, rgba(0, 0, 0, .1));color:var(--color-text-primary, #333);transform:scale(1.1)}.hint-modal-content{padding:1.5rem;max-height:60vh;overflow-y:auto}.hint-modal-content h4{margin:1.5rem 0 .5rem;color:var(--color-text-primary, #333);font-size:1rem;font-weight:600}.hint-modal-content h4:first-child{margin-top:0}.hint-description p,.hint-explanation p,.hint-reasoning p{margin:0;color:var(--color-text-secondary, #666);line-height:1.6;font-size:.95rem}.hint-suggestion{background:var(--color-background-tertiary, rgba(74, 144, 226, .1));border-radius:var(--effect-border-radius, 12px);padding:1rem;margin:1rem 0;border-left:4px solid var(--color-primary, #4a90e2)}.hint-move{display:flex;align-items:center;gap:1rem;margin-top:.5rem}.hint-position{background:var(--color-cell-background, white);color:var(--color-text-primary, #333);padding:.5rem 1rem;border-radius:8px;font-weight:600;border:2px solid var(--color-border-secondary, #e0e0e0);font-size:.9rem}.hint-arrow{color:var(--color-primary, #4a90e2);font-size:1.5rem;font-weight:700}.hint-value{background:var(--color-primary, #4a90e2);color:#fff;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;box-shadow:0 4px 12px var(--color-primary, rgba(74, 144, 226, .3))}.hint-cells,.hint-values{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}.hint-cell{background:var(--color-background-tertiary, rgba(0, 0, 0, .05));color:var(--color-text-secondary, #666);padding:.25rem .75rem;border-radius:20px;font-size:.85rem;font-weight:500}.hint-eliminated-value{background:var(--color-error, #f44336);color:#fff;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.9rem}.hint-modal-actions{display:flex;gap:1rem;padding:1.5rem;background:var(--color-background-tertiary, rgba(0, 0, 0, .02));border-top:1px solid var(--color-border-secondary, #e0e0e0)}.hint-learn-btn,.hint-apply-btn{flex:1;padding:.75rem 1.5rem;border:none;border-radius:25px;font-weight:600;cursor:pointer;transition:all var(--animation-duration, .3s) var(--animation-easing, ease);font-size:.95rem}.hint-learn-btn{background:var(--color-background-secondary, white);color:var(--color-text-primary, #333);border:2px solid var(--color-border-secondary, #e0e0e0)}.hint-learn-btn:hover{background:var(--color-background-tertiary, #f5f5f5);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.hint-apply-btn{background:linear-gradient(135deg,var(--color-secondary, #ffc107),var(--color-secondary-hover, #e0a800));color:#fff;box-shadow:0 4px 15px var(--color-secondary, rgba(255, 193, 7, .3))}.hint-apply-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px var(--color-secondary, rgba(255, 193, 7, .4))}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.hint-modal-content::-webkit-scrollbar{width:6px}.hint-modal-content::-webkit-scrollbar-track{background:transparent}.hint-modal-content::-webkit-scrollbar-thumb{background:var(--color-primary, #4a90e2);border-radius:3px}.hint-modal-content::-webkit-scrollbar-thumb:hover{background:var(--color-primary-hover, #357abd)}@media (max-width: 600px){.hint-modal{margin:1rem;max-height:85vh}.hint-modal-header,.hint-modal-content{padding:1rem}.hint-modal-actions{padding:1rem;flex-direction:column}.hint-move{flex-direction:column;align-items:stretch;text-align:center;gap:.5rem}.hint-cells,.hint-values{justify-content:center}}.victory-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#0000008c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;padding:1rem;animation:victory-fade .25s ease-out}.victory-modal{background:var(--color-background-secondary, #fff);color:var(--color-text-primary, #222);border-radius:var(--effect-border-radius, 20px);padding:2rem 2.25rem 2.25rem;width:min(420px,100%);text-align:center;box-shadow:0 24px 60px #00000059;animation:victory-pop .35s cubic-bezier(.2,.9,.3,1.3)}.victory-trophy{display:flex;justify-content:center;line-height:1;color:#f5b301;filter:drop-shadow(0 4px 10px rgba(245,179,1,.45));animation:victory-bounce 1.2s ease-in-out infinite}.victory-title{margin:.5rem 0 .25rem;font-size:1.9rem;font-weight:800;color:var(--color-text-primary, #222)}.victory-badge{display:inline-flex;align-items:center;gap:.35rem;margin:.25rem auto .5rem;padding:.3rem .9rem;border-radius:999px;font-weight:700;font-size:.85rem;color:#fff;background:linear-gradient(135deg,#ffb300,#ff7a00);box-shadow:0 4px 14px #ff960066}.victory-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;margin:1.25rem 0 1.5rem}.victory-stat{display:flex;flex-direction:column;gap:.15rem;padding:.75rem .5rem;border-radius:14px;background:var(--color-background, rgba(0, 0, 0, .04));border:1px solid var(--color-border-secondary, rgba(0, 0, 0, .08))}.victory-stat-value{font-size:1.3rem;font-weight:700;color:var(--color-primary, #4a90e2);text-transform:capitalize}.victory-stat-label{font-size:.75rem;letter-spacing:.05em;text-transform:uppercase;opacity:.65}.victory-newgame-btn{width:100%;padding:.9rem 1.5rem;border:none;border-radius:999px;font-size:1.05rem;font-weight:700;cursor:pointer;color:#fff;background:linear-gradient(135deg,var(--color-primary, #4a90e2),var(--color-primary-hover, #357abd));box-shadow:0 6px 18px #4a90e266;transition:transform .15s ease,box-shadow .15s ease}.victory-newgame-btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px #4a90e280}.victory-newgame-btn:focus-visible{outline:3px solid var(--color-secondary, #ffc107);outline-offset:2px}@keyframes victory-pop{0%{opacity:0;transform:scale(.85) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes victory-bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@media (prefers-reduced-motion: reduce){.victory-overlay,.victory-modal,.victory-trophy{animation:none}}.theme-selector{position:relative;display:inline-block}.theme-selector-full-width{width:100%}.theme-selector-button{display:flex;align-items:center;gap:.5rem;background:var(--color-background-secondary, rgba(255, 255, 255, .9));border:2px solid var(--color-primary, #4a90e2);border-radius:var(--effect-border-radius, 12px);padding:.75rem;cursor:pointer;transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out);font-size:1rem;-webkit-backdrop-filter:blur(var(--effect-blur, 10px));backdrop-filter:blur(var(--effect-blur, 10px));box-shadow:var(--effect-shadow, 0 4px 15px rgba(0, 0, 0, .1))}.theme-selector-button:hover{transform:scale(var(--animation-scale-hover, 1.05));box-shadow:var(--effect-shadow-hover, 0 6px 20px rgba(0, 0, 0, .15))}.theme-selector-button-full-width{width:100%;justify-content:flex-start;gap:1rem;background:linear-gradient(135deg,var(--color-primary, #4a90e2),var(--color-primary-hover, #357abd));color:#fff;border:none;padding:1rem 1.5rem;border-radius:var(--effect-border-radius, 12px);font-weight:600;cursor:pointer;transition:all var(--animation-duration, .3s) var(--animation-easing, ease);box-shadow:var(--effect-shadow, 0 4px 15px rgba(74, 144, 226, .3));font-size:1rem}.theme-selector-button-full-width:hover{transform:translateY(-2px);box-shadow:0 6px 20px #4a90e266}.theme-name{flex:1;text-align:left;display:flex;align-items:center;gap:.45rem}.theme-preview{width:20px;height:20px;border-radius:50%;transition:all var(--animation-duration, .2s)}.theme-selector-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;z-index:1099}.theme-selector-dropdown{position:absolute;top:100%;right:0;margin-top:.5rem;background:var(--color-background-secondary, #ffffff);border-radius:var(--effect-border-radius, 12px);padding:1.5rem;box-shadow:var(--effect-shadow-hover, 0 20px 40px rgba(0, 0, 0, .15));-webkit-backdrop-filter:blur(var(--effect-blur, 10px));backdrop-filter:blur(var(--effect-blur, 10px));z-index:1000;width:350px;max-height:500px;overflow-y:auto;animation:slideDown .2s ease-out}.theme-selector-dropdown-centered{position:fixed;top:50%;left:50%;right:auto;transform:translate(-50%,-50%);margin-top:0;z-index:1100;animation:fadeInCenter .2s ease-out}.theme-selector-header{margin-bottom:1rem;text-align:center}.theme-selector-header h3{margin:0;color:var(--color-text-primary, #333);font-size:1.2rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:.45rem}.theme-grid{display:grid;gap:1rem;max-height:400px;overflow-y:auto}.theme-card{display:flex;align-items:center;gap:1rem;padding:1rem;border:2px solid transparent;border-radius:var(--effect-border-radius, 12px);background:var(--color-background-tertiary, rgba(0, 0, 0, .05));cursor:pointer;transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out);position:relative;text-align:left;width:100%}.theme-card:hover{transform:translateY(-2px);box-shadow:0 8px 25px #00000026;border-color:var(--color-primary, #4a90e2)}.theme-card.active{border-color:var(--color-primary, #4a90e2);background:var(--color-primary, #4a90e2)20}.theme-card-preview{width:50px;height:40px;border-radius:8px;position:relative;overflow:hidden;flex-shrink:0}.theme-card-accent{position:absolute;top:0;left:0;right:50%;bottom:0}.theme-card-secondary{position:absolute;top:0;left:50%;right:0;bottom:0}.theme-card-info{flex:1;min-width:0}.theme-card-info h4{margin:0 0 .25rem;color:var(--color-text-primary, #333);font-size:.95rem;font-weight:600}.theme-card-info p{margin:0;color:var(--color-text-secondary, #666);font-size:.8rem;line-height:1.3}.theme-card-check{position:absolute;top:.5rem;right:.5rem;width:22px;height:22px;border-radius:50%;background:var(--color-primary, #4a90e2);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px #00000040}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInCenter{0%{opacity:0;transform:translate(-50%,-50%) scale(.95)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}.theme-selector-dropdown::-webkit-scrollbar{width:6px}.theme-selector-dropdown::-webkit-scrollbar-track{background:transparent}.theme-selector-dropdown::-webkit-scrollbar-thumb{background:var(--color-primary, #4a90e2);border-radius:3px}.theme-selector-dropdown::-webkit-scrollbar-thumb:hover{background:var(--color-primary-hover, #357abd)}@media (max-width: 600px){.theme-selector-dropdown{width:300px;right:-50px}.theme-card{padding:.75rem}.theme-card-preview{width:40px;height:32px}}.hamburger-button{position:absolute;top:1rem;left:1rem;z-index:1000;background:var(--color-background-secondary, rgba(255, 255, 255, .95));border:2px solid var(--color-primary, #4a90e2);border-radius:50%;width:48px;height:48px;cursor:pointer;transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out);box-shadow:var(--effect-shadow, 0 4px 15px rgba(0, 0, 0, .1));display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(var(--effect-blur, 10px));backdrop-filter:blur(var(--effect-blur, 10px));color:var(--color-primary, #4a90e2)}.hamburger-button:hover{transform:scale(1.05);box-shadow:var(--effect-shadow, 0 6px 20px rgba(74, 144, 226, .2));background:var(--color-primary, #4a90e2);color:#fff}@media (max-width: 480px){.hamburger-button{width:44px;height:44px}}.hamburger-overlay{position:fixed;left:0;top:0;width:100%;height:100vh;height:100svh;z-index:1001;background:#0f121e8c;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:14px;animation:menuFade .2s ease-out}.hamburger-menu{position:relative;z-index:1002;width:min(420px,100%);max-height:100%;display:flex;flex-direction:column;overflow:hidden;border-radius:26px;background:var(--color-background-secondary, #ffffff);box-shadow:0 30px 80px #00000073,0 0 0 1px #ffffff1f inset;animation:menuPopIn .32s cubic-bezier(.2,.9,.3,1.25)}@keyframes menuFade{0%{opacity:0}to{opacity:1}}@keyframes menuPopIn{0%{opacity:0;transform:scale(.92) translateY(14px)}to{opacity:1;transform:scale(1) translateY(0)}}.hamburger-menu-header{flex:0 0 auto;display:flex;justify-content:space-between;align-items:center;padding:1.1rem 1.25rem;color:#fff;background:linear-gradient(135deg,var(--color-primary, #4a90e2),var(--color-primary-hover, #357abd))}.hamburger-menu-title{display:flex;align-items:center;gap:.6rem}.hamburger-menu-title h3{margin:0;font-size:1.2rem;font-weight:700;letter-spacing:.2px}.close-button{background:#ffffff2e;border:none;color:#fff;width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:50%;cursor:pointer;transition:all var(--animation-duration, .2s) ease}.close-button:hover{background:#ffffff52;transform:scale(1.08)}.hamburger-menu-content{flex:1 1 auto;min-height:0;padding:1.25rem;overflow-y:auto;-webkit-overflow-scrolling:touch;display:flex;flex-direction:column;gap:1.3rem}.menu-section{display:flex;flex-direction:column;gap:.55rem}.menu-label{font-weight:700;color:var(--color-text-muted, #8a94a6);font-size:.72rem;text-transform:uppercase;letter-spacing:.09em;padding-left:.15rem}.seg-control{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;border-radius:14px;background:var(--color-background-tertiary, rgba(0, 0, 0, .05));border:1px solid var(--color-border-secondary, rgba(0, 0, 0, .06))}.seg-btn{border:none;background:transparent;color:var(--color-text-secondary, #555);font-weight:600;font-size:.92rem;padding:.6rem .5rem;border-radius:10px;cursor:pointer;transition:all .18s ease}.seg-btn:hover{color:var(--color-text-primary, #222)}.seg-btn.active{color:#fff;background:linear-gradient(135deg,var(--color-primary, #4a90e2),var(--color-primary-hover, #357abd));box-shadow:0 4px 12px #4a90e259}.menu-card{border-radius:16px;background:var(--color-background-tertiary, rgba(0, 0, 0, .035));border:1px solid var(--color-border-secondary, rgba(0, 0, 0, .06));padding:.25rem .85rem}.menu-toggle{display:flex;align-items:center;justify-content:space-between;padding:.6rem 0;font-size:.95rem;color:var(--color-text-primary, #333)}.menu-toggle+.menu-toggle{border-top:1px solid var(--color-border-secondary, rgba(0, 0, 0, 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#ffc107);outline-offset:2px}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}.stat-chip{display:flex;flex-direction:column;align-items:center;gap:.1rem;padding:.7rem .25rem;border-radius:14px;background:var(--color-background-tertiary, rgba(0, 0, 0, .04));border:1px solid var(--color-border-secondary, rgba(0, 0, 0, .06))}.stat-value{font-size:1.15rem;font-weight:800;color:var(--color-primary, #4a90e2);line-height:1.1}.stat-label{font-size:.66rem;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted, #8a94a6);font-weight:600}.hamburger-menu-footer{flex:0 0 auto;padding:1rem 1.25rem;padding-bottom:calc(1rem + env(safe-area-inset-bottom,0px));border-top:1px solid var(--color-border-secondary, rgba(0, 0, 0, .08));background:var(--color-background-secondary, #fff)}.menu-new-game-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:.5rem;background:linear-gradient(135deg,var(--color-primary, #4a90e2),var(--color-primary-hover, #357abd));color:#fff;border:none;padding:.95rem 1.5rem;border-radius:14px;font-weight:700;font-size:1.02rem;cursor:pointer;box-shadow:0 8px 22px #4a90e266;transition:transform .15s ease,box-shadow .15s ease}.menu-new-game-btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px #4a90e280}.app{text-align:center;width:100%}.app-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;flex-wrap:wrap;gap:1rem}.app h1{font-size:clamp(2rem,6vw,3rem);margin:0;color:var(--title-color, white);text-shadow:var(--title-shadow, 2px 2px 4px rgba(0, 0, 0, .3));font-weight:700;flex:1;transition:color var(--animation-duration, .2s) var(--animation-easing, ease)}.app-controls{display:flex;gap:1rem;align-items:center}.game-container{background:var(--color-background-secondary, rgba(255, 255, 255, .95));border-radius:var(--effect-border-radius, 20px);padding:2rem;box-shadow:var(--effect-shadow, 0 20px 40px rgba(0, 0, 0, .1));-webkit-backdrop-filter:blur(var(--effect-blur, 10px));backdrop-filter:blur(var(--effect-blur, 10px));max-width:600px;margin:0 auto;transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out);position:relative}.above-board{display:flex;justify-content:center;align-items:center;gap:.75rem;margin-bottom:1.5rem}.notes-btn{background:var(--color-background-secondary, white);border:2px solid var(--color-border-secondary, #e0e0e0);color:var(--color-text-primary, #333);padding:.75rem 1.25rem;border-radius:25px;font-weight:600;cursor:pointer;transition:all var(--animation-duration, .2s) var(--animation-easing, ease);display:inline-flex;align-items:center;gap:.4rem}.notes-btn:hover{transform:translateY(-1px)}.notes-btn.active{background:linear-gradient(135deg,var(--color-primary, #4a90e2),var(--color-primary-hover, #357abd));color:#fff;border-color:transparent;box-shadow:0 4px 14px #4a90e259}.below-board{display:flex;justify-content:center;margin-top:1.5rem}.timer-undo-row{display:flex;align-items:center;gap:1rem;justify-content:center}@media (max-width: 600px){.timer-undo-row{flex-direction:row;gap:1rem;justify-content:space-between}.hint-btn{padding:1rem 2rem;font-size:1.1rem}.game-container{padding:1.5rem}}.undo-redo-buttons{display:flex;gap:.25rem;background:var(--color-background-secondary, white);border-radius:20px;padding:.25rem;border:2px solid var(--color-border-secondary, #e0e0e0)}.undo-btn,.redo-btn{background:transparent;border:none;padding:.5rem;border-radius:15px;font-size:1.2rem;cursor:pointer;transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out);color:var(--color-text-primary, #333);width:36px;height:36px;display:flex;align-items:center;justify-content:center}.undo-btn:hover:not(:disabled),.redo-btn:hover:not(:disabled){background:var(--color-primary, #4a90e2);color:#fff;transform:scale(1.1)}.undo-btn:disabled,.redo-btn:disabled{opacity:.3;cursor:not-allowed}.hint-btn{background:linear-gradient(135deg,var(--color-secondary, #ffc107),var(--color-secondary-hover, #e0a800));color:#fff;border:none;padding:.75rem 1.5rem;border-radius:25px;font-weight:600;cursor:pointer;transition:all var(--animation-duration, .3s) var(--animation-easing, ease);box-shadow:0 4px 15px var(--color-secondary, rgba(255, 193, 7, .3));display:inline-flex;align-items:center;gap:.4rem}.hint-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #ffc10766}.hint-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.hint-info-btn{background:var(--color-primary, #4a90e2);color:#fff;border:none;padding:.5rem .6rem;border-radius:20px;display:inline-flex;align-items:center;justify-content:center;font-size:1rem;cursor:pointer;margin-left:.5rem;transition:all var(--animation-duration, .3s) var(--animation-easing, ease);box-shadow:0 2px 10px #4a90e24d;animation:slideIn .3s ease-out}.hint-info-btn:hover{transform:translateY(-1px) scale(1.05);box-shadow:0 4px 15px #4a90e266}@keyframes slideIn{0%{opacity:0;transform:translate(-10px)}to{opacity:1;transform:translate(0)}}.board-wrap{position:relative}.control-buttons{display:flex;align-items:center;gap:.5rem}.pause-btn{background:var(--color-background-secondary, white);border:2px solid var(--color-border-secondary, #e0e0e0);color:var(--color-text-primary, #333);width:40px;height:40px;border-radius:50%;font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--animation-duration, .2s) var(--animation-easing, ease-in-out)}.pause-btn:hover:not(:disabled){background:var(--color-primary, #4a90e2);color:#fff;transform:scale(1.08)}.pause-btn:disabled{opacity:.3;cursor:not-allowed}.pause-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:var(--color-background-secondary, rgba(255, 255, 255, .9));-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:var(--effect-border-radius, 12px);z-index:5;animation:victory-fade .2s ease-out}.pause-content{text-align:center;color:var(--color-text-primary, #333)}.pause-icon{font-size:2.5rem}.pause-content h2{margin:.25rem 0 1rem}.resume-btn{padding:.75rem 2rem;border:none;border-radius:999px;font-weight:700;font-size:1rem;cursor:pointer;color:#fff;background:linear-gradient(135deg,var(--color-primary, #4a90e2),var(--color-primary-hover, #357abd));box-shadow:0 6px 18px #4a90e266;transition:transform .15s ease}.resume-btn:hover{transform:translateY(-2px)}@keyframes victory-fade{0%{opacity:0}to{opacity:1}}.completion-message{margin-top:2rem;padding:2rem;background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;border-radius:15px;text-align:center;animation:slideIn .5s ease-out,pulse 2s infinite;box-shadow:0 10px 30px #4caf504d}.completion-message h2{margin:0 0 .5rem;font-size:2rem}.completion-message p{margin:0;font-size:1.2rem;opacity:.9}@keyframes slideIn{0%{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%;--color-background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--color-text-primary: #333333;--animation-duration: .2s;--animation-easing: ease-in-out;--effect-border-radius: 12px}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;display:flex;place-items:center;background:var(--color-background);color:var(--color-text-primary);transition:all var(--animation-duration) var(--animation-easing);overscroll-behavior:none;touch-action:manipulation}#root{width:100%;max-width:1280px;margin:0 auto;padding:clamp(1rem,4vw,2rem)}.no-anim *,.no-anim *:before,.no-anim *:after{animation:none!important;transition:none!important}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}:root{--num-given: var(--color-text-primary, #2a3550);--num-user: var(--color-primary, #4a90e2);--num-glow: none;--title-color: #ffffff;--title-shadow: 2px 2px 6px rgba(0, 0, 0, .3)}body.theme-default,body.theme-sunset{--cell-sheen: linear-gradient(180deg, rgba(255, 255, 255, .14), rgba(0, 0, 0, .02));--cell-bevel: inset 0 1px 0 rgba(255, 255, 255, .7), inset 0 -2px 4px rgba(0, 0, 0, .04);--cell-selected-shadow: inset 0 0 0 2px rgba(255, 255, 255, .55), 0 3px 12px rgba(0, 0, 0, .2)}body.theme-dark{--cell-sheen: linear-gradient(180deg, rgba(255, 255, 255, .07), rgba(0, 0, 0, .12));--cell-bevel: inset 0 1px 0 rgba(255, 255, 255, .12), inset 0 0 0 1px rgba(255, 255, 255, .04);--num-given: #eef0ff;--num-user: #b3a7ff;--num-glow: 0 0 10px rgba(124, 108, 255, .5);--cell-selected-shadow: inset 0 0 0 1px rgba(255, 255, 255, .5), 0 0 18px rgba(124, 108, 255, .75)}body.theme-dark .app h1,body.theme-neon .app h1{text-shadow:0 0 22px var(--color-primary, #7c6cff),0 2px 6px rgba(0,0,0,.4)}body.theme-dark .game-board,body.theme-neon .game-board{box-shadow:var(--effect-shadow),0 0 45px color-mix(in srgb,var(--color-primary) 30%,transparent)}body.theme-neon{--cell-sheen: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(0, 0, 0, .14));--cell-bevel: inset 0 1px 0 rgba(255, 255, 255, .1), inset 0 0 0 1px rgba(45, 212, 191, .1);--num-given: #e7fbff;--num-user: #5eead4;--num-glow: 0 0 10px rgba(45, 212, 191, .6);--cell-selected-shadow: inset 0 0 0 1px rgba(255, 255, 255, .6), 0 0 20px rgba(45, 212, 191, .85)}body.theme-nature{--cell-sheen: none;--cell-bevel: inset 2px 2px 5px rgba(176, 154, 122, .5), inset -2px -2px 5px rgba(255, 252, 244, .85);--num-given: #5b4632;--num-user: #b35a32;--num-glow: none;--cell-selected-shadow: inset 3px 3px 7px rgba(150, 90, 55, .55), inset -2px -2px 6px rgba(255, 230, 210, .5);--title-color: #5b4632;--title-shadow: 0 2px 3px rgba(255, 255, 255, .6)}body.theme-nature .cell.selected{background-image:none}body.theme-nature .cell.selected .cell-value{color:#fff8f0}body.theme-minimal{--cell-sheen: none;--cell-bevel: none;--num-given: #111111;--num-user: #2b6fd6;--title-color: #1a1f29;--title-shadow: none;--cell-selected-shadow: inset 0 0 0 2px #ffffff}