@import"https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap";*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}button{border:none;background:none;cursor:pointer;font-family:inherit}input,textarea{font-family:inherit}ul,ol{list-style:none}a{text-decoration:none;color:inherit}:root{--font-family: "Share Tech Mono", monospace;--font-size-base: 16px;--gutter-base: 8px;--gutter-sm: calc(var(--gutter-base) * .5);--gutter-md: var(--gutter-base);--gutter-lg: calc(var(--gutter-base) * 2);--gutter-xl: calc(var(--gutter-base) * 3);--gutter-2xl: calc(var(--gutter-base) * 4);--color-timberwolf: #DAD7CD;--color-sage: #A3B18A;--color-fern-green: #588157;--color-hunter-green: #3A5A40;--color-brunswick-green: #344E41;--color-primary: var(--color-hunter-green);--color-primary-light: var(--color-sage);--color-primary-dark: var(--color-brunswick-green);--color-background: var(--color-timberwolf);--color-surface: #ffffff;--color-text: #333333;--color-text-light: #666666;--color-border: #e0e0e0;--color-error: #d32f2f;--color-error-bg: #ffebee;--color-warning: #f57c00;--color-warning-bg: #fff3e0;--color-success: var(--color-fern-green);--color-success-bg: #e8f5e8;--primary: var(--color-primary);--primary-hover: var(--color-primary-dark);--secondary: var(--color-background);--accent: var(--color-fern-green);--surface: var(--color-surface);--surface-hover: #f5f5f5;--background: var(--color-background);--text-primary: var(--color-text);--text-secondary: var(--color-text-light);--border: var(--color-border);--warning-bg: var(--color-warning-bg);--warning-text: var(--color-warning);--success-bg: var(--color-success-bg);--success-text: var(--color-success);--shadow-sm: 0 4px 15px rgba(58, 90, 64, .2);--shadow-md: 0 4px 15px rgba(58, 90, 64, .3);--shadow-lg: 0 6px 20px rgba(58, 90, 64, .4);--shadow-card: 0 20px 40px rgba(0, 0, 0, .1);--shadow-modal: 0 20px 40px rgba(0, 0, 0, .3);--transition-fast: .2s ease;--transition-normal: .3s ease;--transition-slow: .5s ease}body{font-family:var(--font-family);font-weight:400;font-style:normal;font-size:var(--font-size-base);line-height:1.5;background:linear-gradient(135deg,var(--color-sage) 0%,var(--color-hunter-green) 100%);min-height:100vh;display:flex;align-items:center;justify-content:center;color:var(--color-text)}.hidden{display:none!important}.btn{font-family:inherit;font-size:.95rem;font-weight:600;border:none;border-radius:var(--gutter-md);cursor:pointer;transition:all var(--transition-normal);outline:none}.btn:focus{outline:2px solid var(--color-primary);outline-offset:2px}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.btn--primary{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;box-shadow:var(--shadow-md)}.btn--primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-lg)}.btn--primary:active:not(:disabled){transform:translateY(0)}.btn--secondary{background:#f8f9fa;color:var(--color-text-light);border:2px solid var(--color-border)}.btn--secondary:hover:not(:disabled){background:#e9ecef;border-color:#ccc}.btn--success{background:var(--color-success);color:#fff}.btn--success:hover:not(:disabled){background:var(--color-fern-green);transform:translateY(-1px)}.modal-overlay{position:fixed;inset:0;background:#0009;backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;transition:opacity var(--transition-normal);padding:var(--gutter-lg)}.modal-overlay-visible{opacity:1}.modal-container{background:var(--color-surface);border-radius:var(--gutter-lg);box-shadow:var(--shadow-modal);max-width:500px;width:100%;max-height:85vh;overflow:hidden;transform:scale(.9) translateY(20px);transition:transform var(--transition-normal)}.modal-container-visible{transform:scale(1) translateY(0)}.modal-content{display:flex;flex-direction:column}.modal-header{padding:var(--gutter-xl) var(--gutter-xl) 0;border-bottom:1px solid var(--color-border);margin-bottom:var(--gutter-lg)}.modal-title{font-size:1.3rem;font-weight:600;color:var(--color-text);margin:0;padding-bottom:var(--gutter-lg)}.modal-body{padding:0 var(--gutter-xl);flex:1;overflow-y:auto}.modal-message{font-size:1rem;line-height:1.5;color:var(--color-text-light);margin:0}.modal-footer{padding:var(--gutter-xl);display:flex;gap:var(--gutter-md);justify-content:flex-end;border-top:1px solid var(--color-border);margin-top:var(--gutter-lg)}.modal-btn{font-family:inherit;font-size:.95rem;font-weight:600;border:none;border-radius:var(--gutter-md);cursor:pointer;transition:all var(--transition-normal);outline:none;padding:var(--gutter-md) var(--gutter-xl);min-width:80px}.modal-btn:focus{outline:2px solid var(--color-primary);outline-offset:2px}.modal-btn-confirm{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;box-shadow:var(--shadow-md)}.modal-btn-confirm:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg)}.modal-btn-cancel{background:#f8f9fa;color:var(--color-text-light);border:2px solid var(--color-border)}.modal-btn-cancel:hover{background:#e9ecef;border-color:#ccc}.modal-success .modal-header{background:linear-gradient(135deg,var(--color-success) 0%,var(--color-fern-green) 100%);color:#fff;border-radius:var(--gutter-lg) var(--gutter-lg) 0 0;margin-bottom:0;border-bottom:none;.modal-title{color:#fff}}.modal-success .modal-body{padding-top:var(--gutter-xl)}.modal-warning .modal-header{background:linear-gradient(135deg,var(--color-warning) 0%,#e65100 100%);color:#fff;border-radius:var(--gutter-lg) var(--gutter-lg) 0 0;margin-bottom:0;border-bottom:none;.modal-title{color:#fff}}.modal-warning .modal-body{padding-top:var(--gutter-xl)}.modal-confirmation .modal-header{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;border-radius:var(--gutter-lg) var(--gutter-lg) 0 0;margin-bottom:0;border-bottom:none;.modal-title{color:#fff}}.modal-confirmation .modal-body{padding-top:var(--gutter-xl)}.difficulty-selection{display:flex;flex-direction:column;gap:var(--gutter-md);margin-top:var(--gutter-lg);margin-bottom:var(--gutter-sm)}.difficulty-option{display:flex;align-items:center;gap:var(--gutter-lg);padding:var(--gutter-md) var(--gutter-lg);border:2px solid var(--color-border);border-radius:var(--gutter-md);cursor:pointer;transition:all var(--transition-normal);background:var(--color-surface)}.difficulty-option:hover{border-color:var(--color-primary);background:var(--color-background);transform:translateY(-1px);box-shadow:0 4px 12px #3a5a4026}.difficulty-option.selected{border-color:var(--color-primary);background:linear-gradient(135deg,var(--color-background) 0%,#f0f4f0 100%);box-shadow:0 4px 15px #3a5a4033}.difficulty-stars{display:flex;gap:calc(var(--gutter-base) * .25);min-width:100px;flex-shrink:0}.difficulty-stars .star{font-size:1.3rem;transition:all var(--transition-fast)}.difficulty-info{flex:1;min-width:0}.difficulty-name{font-size:1.05rem;font-weight:600;color:var(--color-text);margin-bottom:calc(var(--gutter-base) * .125);line-height:1.2}.difficulty-description{font-size:.85rem;color:var(--color-text-light);line-height:1.3}#start-screen{text-align:center;max-width:400px;width:90%}#start-screen h1{font-size:40px;margin-bottom:0;color:var(--color-surface);font-weight:700;text-transform:uppercase;line-height:24px;text-align:left;margin-left:var(--gutter-2xl);text-shadow:var(--shadow-card)}#start-screen .button-container{background:var(--color-surface);padding:var(--gutter-2xl);border-radius:var(--gutter-lg);box-shadow:var(--shadow-card);display:flex;flex-direction:column;gap:var(--gutter-lg)}#start-screen .game-btn{padding:var(--gutter-lg) var(--gutter-2xl);font-size:1.1rem;font-weight:600;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;border:none;border-radius:var(--gutter-md);cursor:pointer;transition:all var(--transition-normal);box-shadow:var(--shadow-md)}#start-screen .game-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}#start-screen .game-btn:active{transform:translateY(0)}#start-screen .game-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}#start-screen .game-btn:disabled:hover{transform:none;box-shadow:var(--shadow-sm)}#start-screen .game-btn:focus{outline:2px solid var(--color-primary-light);outline-offset:2px}footer{padding:var(--gutter-lg);text-align:center;font-size:.9rem;color:var(--color-text-secondary);.developer{text-decoration:underline}}#sudoku-container{background:var(--color-surface);padding:var(--gutter-lg) var(--gutter-2xl);border-radius:var(--gutter-lg);box-shadow:var(--shadow-card);max-width:600px;width:95%}.game-header{display:flex;justify-content:flex-start;align-items:center;margin-bottom:var(--gutter-md);padding-bottom:var(--gutter-md);border-bottom:2px solid #f0f0f0;h2{font-size:1.5rem;color:var(--color-primary);font-weight:600}}#sudoku-container .header-controls{display:flex;gap:var(--gutter-sm);justify-content:space-between;align-items:center;flex-flow:row nowrap}#sudoku-container .header-controls .control-btn{padding:var(--gutter-sm) var(--gutter-lg);font-size:.9rem;background:#f8f9fa;color:var(--color-primary);border:2px solid var(--color-primary);border-radius:6px;cursor:pointer;transition:all var(--transition-normal)}#sudoku-container .header-controls .control-btn:hover{background:var(--color-primary);color:#fff}#sudoku-container .header-controls .control-btn:focus{outline:2px solid var(--color-primary-light);outline-offset:2px}.board-grid{display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);gap:1px;background:var(--color-text);border:3px solid var(--color-text);border-radius:var(--gutter-md);padding:3px;aspect-ratio:1;max-width:500px;margin:0 auto}.cell{background:var(--color-surface);display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:1.2rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);min-height:40px;outline:none;user-select:none;position:relative;padding:2px;touch-action:manipulation;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.cell:hover{background:var(--color-background)}.cell:focus{background:#e8f5e8;outline:2px solid var(--color-primary);outline-offset:-2px}.cell.given{background:#f4f4f4;color:#6c757d;font-weight:700;cursor:pointer;position:relative;&:focus{outline:none}}.cell.user-input{color:var(--color-primary);background:var(--color-surface);font-weight:600;position:relative}.cell.hint-cell{background:#e3f2fd;color:#1976d2;border:2px solid #64b5f6;font-weight:700}.cell.invalid{background:var(--color-error-bg);color:var(--color-error);animation:shake .3s ease-in-out}.cell.selected{background:var(--color-primary-light);color:var(--color-surface);outline:3px solid var(--color-primary);outline-offset:-3px;font-weight:700}.cell.selected:before,.cell.selected:after{display:none}.cell:nth-child(3n):not(:nth-child(9n)){border-right:2px solid var(--color-text)}.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--color-text)}.cell-value{font-size:1.2rem;font-weight:600;z-index:2;background:#ffffffe6;border-radius:2px;padding:2px 4px;margin:2px}.cell.has-value-and-notes .cell-value{font-size:1rem;font-weight:700;background:#fffffff2;box-shadow:0 1px 2px #0000001a}.cell-notes,.cell-notes-only{display:flex;flex-wrap:wrap;justify-content:flex-start;align-items:flex-start;gap:1px;position:absolute;top:1px;left:1px;right:1px;line-height:1}.cell-notes-only{position:static;width:100%;height:100%;align-content:flex-start}.note-number{font-size:.6rem;font-weight:400;color:var(--color-text-light);background:#0000000d;border-radius:2px;padding:1px 2px;line-height:1;min-width:8px;text-align:center}.cell-notes .note-number{margin:0}.cell-notes-only .note-number{margin:1px}@media (max-width: 768px){.note-number{font-size:.5rem;padding:.5px 1px;min-width:6px}.cell-value{font-size:1rem}.cell-notes+.cell-value,.cell-value+.cell-notes{font-size:.9rem}}.timer-container{padding:var(--gutter-md) var(--gutter-lg);border-radius:var(--gutter-md)}.timer-container .timer-label{font-size:.9rem;font-weight:500;margin-right:var(--gutter-sm);opacity:.9}.timer-container .timer-display{font-family:Courier New,Monaco,monospace;font-size:1.2rem;font-weight:700;letter-spacing:.1em}.share-container{margin-top:var(--gutter-xl);padding:var(--gutter-lg);background:#f8f9fa;border-radius:var(--gutter-md);border:2px solid var(--color-border)}.share-container .share-header{margin-bottom:var(--gutter-sm)}.share-container .share-header .share-label{font-size:.9rem;color:var(--color-text-light);font-weight:500}.share-container .share-link-container{display:flex;gap:var(--gutter-sm);align-items:center}.share-container .share-link-container .share-link{flex:1;padding:var(--gutter-sm);border:1px solid #ddd;border-radius:calc(var(--gutter-base) * .5);background:var(--color-surface);font-size:.9rem;color:var(--color-text);min-width:0;transition:border-color var(--transition-fast)}.share-container .share-link-container .share-link:focus{outline:2px solid var(--color-primary);outline-offset:-2px;border-color:var(--color-primary)}.share-container .share-link-container .copy-btn{padding:var(--gutter-sm) var(--gutter-lg);font-size:.9rem;background:var(--color-primary);color:#fff;border:none;border-radius:calc(var(--gutter-base) * .5);cursor:pointer;transition:all var(--transition-normal);white-space:nowrap;flex-shrink:0}.share-container .share-link-container .copy-btn:hover{background:var(--color-primary-dark)}.share-container .share-link-container .copy-btn:active{transform:translateY(1px)}.share-container .share-link-container .copy-btn:focus{outline:2px solid var(--color-primary-light);outline-offset:2px}.share-container .share-link-container .copy-btn.copied{background:var(--color-success)}.number-picker{position:fixed;bottom:0;left:0;right:0;background:var(--color-surface);border-top:2px solid var(--color-border);border-radius:var(--gutter-lg) var(--gutter-lg) 0 0;box-shadow:var(--shadow-modal);z-index:1000;transform:translateY(100%);transition:transform .3s ease-in-out;user-select:none;max-height:50vh;overflow-y:auto;padding-bottom:env(safe-area-inset-bottom,0)}.number-picker.show{transform:translateY(0)}.numpad-title{font-size:1.1rem;font-weight:600;color:var(--color-text)}.numpad-close-btn{background:none;border:none;font-size:1.5rem;color:var(--color-text-light);cursor:pointer;padding:var(--gutter-sm);border-radius:50%;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center;width:32px;height:32px}.numpad-close-btn:hover{background:var(--color-border);color:var(--color-text)}.numpad-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;padding:var(--gutter-lg);background:var(--color-border)}.numpad-btn{background:var(--color-surface);border:none;padding:var(--gutter-xl);font-size:1.5rem;font-weight:600;color:var(--color-text);cursor:pointer;border-radius:var(--gutter-sm);transition:all var(--transition-fast);min-height:60px;display:flex;align-items:center;justify-content:center;font-family:var(--font-family);position:relative;overflow:hidden;touch-action:manipulation;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.numpad-btn:hover{background:var(--color-background);transform:scale(.98)}.numpad-btn:active{background:var(--color-primary-light);color:var(--color-surface);transform:scale(.95)}.numpad-clear{grid-column:1 / -1;background:var(--color-warning-bg);color:var(--color-warning);font-size:1rem;font-weight:600;margin-top:var(--gutter-md);margin-bottom:var(--gutter-md);flex-shrink:0}.numpad-clear:hover{background:var(--color-warning);color:var(--color-surface)}.numpad-btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#0000001a;transform:translate(-50%,-50%);transition:width .3s,height .3s}.numpad-btn:active:before{width:100%;height:100%}.numpad-btn.has-note{background:var(--color-primary-light);color:var(--color-primary);border:2px solid var(--color-primary);font-weight:700}.numpad-btn.has-note:hover{background:var(--color-primary);color:var(--color-surface)}.numpad-btn:not(.has-note):not(.numpad-clear){color:var(--color-text-light);opacity:.7}.numpad-btn:not(.has-note):not(.numpad-clear):hover{opacity:1;color:var(--color-text)}body.numpad-visible{align-items:flex-start;padding-top:var(--gutter-lg)}@media (min-width: 769px){.numpad-grid{grid-template-columns:repeat(10,1fr);max-width:1200px;margin:0 auto;padding:var(--gutter-xl) var(--gutter-2xl);gap:var(--gutter-md);background:transparent}.numpad-btn{min-height:70px;font-size:1.6rem;padding:var(--gutter-lg);border:2px solid var(--color-border)}.numpad-clear{grid-column:auto;margin-top:0;font-size:1.2rem}.number-picker{border-radius:var(--gutter-xl) var(--gutter-xl) 0 0}.numpad-title{font-size:1.2rem}body.numpad-visible #sudoku-container{transform:translateY(-20px);transition:transform .3s ease-in-out}}@media (min-width: 1200px){.numpad-grid{max-width:1400px;padding:var(--gutter-xl) var(--gutter-2xl);gap:var(--gutter-lg)}.numpad-btn{min-height:80px;font-size:1.8rem}.numpad-clear{font-size:1.4rem}}@media (max-width: 768px){body.numpad-visible #sudoku-container{transform:scale(.85);transform-origin:top center;transition:transform .3s ease-in-out;margin-bottom:var(--gutter-lg)}body.numpad-visible .game-header,body.numpad-visible .share-container{display:none}body.numpad-visible .board-grid{margin-top:var(--gutter-lg)}.number-picker{max-height:55vh;overflow-y:auto}.numpad-grid{padding:var(--gutter-md);padding-bottom:var(--gutter-xl)}.numpad-btn{min-height:50px;font-size:1.3rem}}@media (max-width: 480px){body.numpad-visible #sudoku-container{transform:scale(.85);padding:var(--gutter-sm)}.number-picker{max-height:50vh;overflow-y:auto}.numpad-grid{padding-bottom:var(--gutter-2xl)}.numpad-btn{min-height:45px;font-size:1.2rem;padding:var(--gutter-lg)}.numpad-title{font-size:1rem}}@media (max-width: 900px) and (orientation: landscape){body.numpad-visible #sudoku-container{transform:scale(.55);margin-top:var(--gutter-sm)}.number-picker{max-height:70vh;overflow-y:auto}.numpad-grid{padding-bottom:var(--gutter-xl)}.numpad-btn{min-height:35px;font-size:1rem;padding:var(--gutter-sm)}}#scoreboard-container{height:100vh;display:flex;flex-direction:column;max-width:1000px;margin:0 auto;padding:1rem;overflow:hidden}.scoreboard-header{display:flex;justify-content:space-between;align-items:center;margin:2rem 0 1.5rem;flex-wrap:wrap;gap:1rem;flex-shrink:0}.scoreboard-header h2{color:var(--text-primary);font-size:2rem;font-weight:600;margin:0}#btn-back-scoreboard{padding:.75rem 1.5rem;font-size:1rem;font-weight:600;background:var(--secondary);color:var(--text-primary);border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:all .2s ease}#btn-back-scoreboard:hover{background:var(--surface-hover);transform:translateY(-1px)}#scoreboard-content{flex:1;overflow-y:auto;min-height:0}.scoreboard-table{background:var(--surface);border-radius:12px;overflow:hidden;box-shadow:0 2px 8px #0000001a;border:1px solid var(--border)}.scoreboard-table table{width:100%;border-collapse:collapse}.scoreboard-table th{background:var(--primary);color:#fff;padding:1rem;text-align:left;font-weight:600;font-size:.9rem;text-transform:uppercase;letter-spacing:.5px}.scoreboard-table td{padding:1rem;border-bottom:1px solid var(--border);vertical-align:middle}.scoreboard-table tr:last-child td{border-bottom:none}.scoreboard-table tr:hover{background:#f8f9fa}.difficulty-cell{display:flex;align-items:center;justify-content:center}.difficulty-stars{display:flex;gap:calc(var(--gutter-base) * .25)}.difficulty-stars .star{font-size:1.1rem;transition:all var(--transition-fast)}.difficulty-stars .star.filled{color:gold;text-shadow:0 0 4px rgba(255,215,0,.4)}.difficulty-stars .star.empty{color:#ddd}.status-badge{padding:.25rem .75rem;border-radius:20px;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;display:inline-block}.status-badge.ongoing{background:var(--warning-bg);color:var(--warning-text)}.status-badge.completed{background:var(--success-bg);color:var(--success-text)}.action-cell{text-align:center}.game-action-btn{padding:.5rem 1rem;border:none;border-radius:6px;font-weight:600;font-size:.875rem;cursor:pointer;transition:all .2s ease;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-width:80px}.game-action-btn.continue{background:var(--primary);color:#fff}.game-action-btn.continue:hover{background:var(--primary-hover);transform:translateY(-1px)}.game-action-btn.try-again{background:var(--secondary);color:var(--text-primary);border:1px solid var(--border)}.game-action-btn.try-again:hover{background:var(--surface-hover);transform:translateY(-1px)}.scoreboard-empty{text-align:center;padding:3rem 1rem;color:var(--text-secondary);background:var(--surface);border-radius:12px;border:1px solid var(--border)}.scoreboard-empty h3{margin:0 0 1rem;color:var(--text-primary);font-size:1.5rem}.scoreboard-empty p{margin:0;font-size:1.1rem}@media (max-width: 768px){#scoreboard-container{padding:.5rem;height:100vh}.scoreboard-header{flex-direction:column;align-items:flex-start;margin:1rem 0}.scoreboard-header h2{font-size:1.5rem}.scoreboard-table{overflow-x:auto}.scoreboard-table th,.scoreboard-table td{padding:.75rem .5rem;font-size:.875rem}.game-action-btn{padding:.4rem .8rem;font-size:.8rem;min-width:70px}}@media (max-width: 600px){.scoreboard-table th:nth-child(4),.scoreboard-table td:nth-child(4){display:none}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInFromTop{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.animate-fade-in{animation:fadeIn .3s ease-out}.animate-slide-in{animation:slideInFromTop .4s ease-out}.animate-pulse{animation:pulse 2s infinite}@media (max-width: 600px){#sudoku-container{padding:var(--gutter-lg);.game-header{flex-direction:column;gap:var(--gutter-lg);text-align:center}}.cell{font-size:1rem;min-height:35px}#start-screen{padding:0 var(--gutter-2xl)}.share-container{.share-link-container{flex-direction:column;gap:var(--gutter-sm);.copy-btn{width:100%}}}.modal-container{margin:var(--gutter-md);max-width:calc(100vw - var(--gutter-xl));max-height:90vh}.modal-footer{flex-direction:column;gap:var(--gutter-md)}.modal-footer .modal-btn{width:100%}.difficulty-selection{gap:var(--gutter-sm);margin-top:var(--gutter-md);margin-bottom:0}.difficulty-option{gap:var(--gutter-md);padding:var(--gutter-md)}.difficulty-stars{min-width:80px;gap:calc(var(--gutter-base) * .125)}.difficulty-stars .star{font-size:1.1rem}.difficulty-name{font-size:.95rem;margin-bottom:calc(var(--gutter-base) * .0625)}.difficulty-description{font-size:.8rem}}@media (min-width: 1200px){#sudoku-container{max-width:700px;.cell{font-size:1.4rem;min-height:50px}}.modal-container{max-width:600px}}@media (-webkit-min-device-pixel-ratio: 2),(min-resolution: 192dpi){.cell{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}}