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14px;font-size:.85rem;font-weight:600;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;transition:var(--transition);font-family:inherit}.lang-switch__btn--active{background:var(--accent-gradient);color:#fff}.status-pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600}.status-pill--online{background:#22c55e26;color:#22c55e}.status-pill--offline{background:#ef444426;color:#ef4444}.status-pill__dot{width:8px;height:8px;border-radius:50%;background:currentColor;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.auth-view{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;padding:20px 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0;border-bottom:1px solid var(--border-color)}.settings-row:last-child{border-bottom:none}.settings-row__label{font-size:1rem;font-weight:500}.settings-row__desc{font-size:.8rem;color:var(--text-muted);margin-top:2px}.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}.theme-card{aspect-ratio:1;border-radius:var(--radius-md);border:2px solid var(--border-color);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;transition:var(--transition);font-size:.75rem;color:var(--text-secondary)}.theme-card--active{border-color:var(--accent-primary);box-shadow:0 0 0 3px #00d4ff26}.theme-card__swatch{width:36px;height:36px;border-radius:10px}.theme-card__swatch--neon{background:linear-gradient(135deg,#0a0e27,#1a1040);border:1px solid #00d4ff}.theme-card__swatch--zen{background:linear-gradient(135deg,#1a1a2e,#2d2d52);border:1px solid 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reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}:root,[data-theme=neon-aurora]{--bg-primary: #0a0e27;--bg-secondary: #131838;--bg-tertiary: #1c2348;--surface: rgba(255, 255, 255, .06);--surface-hover: rgba(255, 255, 255, .1);--border: rgba(255, 255, 255, .12);--border-strong: rgba(0, 212, 255, .4);--text-primary: #e0e7ff;--text-secondary: #94a3b8;--text-muted: #64748b;--accent: #00d4ff;--accent-2: #a855f7;--accent-grad: linear-gradient(135deg, #00d4ff, #a855f7);--accent-grad-hover: linear-gradient(135deg, #00b8e6, #9333ea);--error: #ef4444;--success: #22c55e;--warning: #f59e0b;--cell-given: #e0e7ff;--cell-input: #00d4ff;--cell-selected: rgba(0, 212, 255, .25);--cell-highlight: rgba(0, 212, 255, .08);--cell-same: rgba(168, 85, 247, .2);--cell-conflict: rgba(239, 68, 68, .3);--cell-border: rgba(255, 255, 255, .1);--cell-border-strong: rgba(255, 255, 255, .35);--glow: 0 0 20px rgba(0, 212, 255, .15);--glow-strong: 0 0 40px rgba(0, 212, 255, .25);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--bg-aurora-1: radial-gradient(ellipse at 20% 0%, rgba(0, 212, 255, .08), transparent 50%);--bg-aurora-2: radial-gradient(ellipse at 80% 100%, rgba(168, 85, 247, .08), transparent 50%);--bg-surface: var(--surface);--bg-surface-hover: var(--surface-hover);--bg-surface-solid: var(--bg-secondary);--bg-elevated: var(--bg-tertiary);--border-color: var(--border);--border-grid: var(--cell-border);--border-grid-thick: var(--cell-border-strong);--accent-primary: var(--accent);--accent-gradient: var(--accent-grad);--cell-highlighted: var(--cell-highlight);--cell-same-number: var(--cell-same);--cell-error: var(--error);--cell-note: var(--text-muted);--shadow-card: var(--shadow-md);--shadow-button: var(--glow);--shadow-glow: var(--glow-strong);--glass-blur: blur(18px);--bg-aurora: var(--bg-aurora-1), var(--bg-aurora-2)}[data-theme=zen-night]{--bg-primary: #1a1a2e;--bg-secondary: #232342;--bg-tertiary: #2d2d52;--surface: rgba(255, 255, 255, .04);--surface-hover: rgba(255, 255, 255, .08);--border: rgba(255, 255, 255, .08);--border-strong: rgba(230, 184, 100, .3);--text-primary: #f5f0e8;--text-secondary: #a8a0b0;--text-muted: #6b6580;--accent: #e6b864;--accent-2: #d4574e;--accent-grad: linear-gradient(135deg, #e6b864, #d4574e);--accent-grad-hover: linear-gradient(135deg, #cca057, #c04d44);--error: #d4574e;--success: #7ec384;--warning: #e6b864;--cell-given: #f5f0e8;--cell-input: #e6b864;--cell-selected: rgba(230, 184, 100, .2);--cell-highlight: rgba(230, 184, 100, .06);--cell-same: rgba(212, 87, 78, .15);--cell-conflict: rgba(212, 87, 78, .25);--cell-border: rgba(255, 255, 255, .06);--cell-border-strong: rgba(255, 255, 255, .22);--glow: 0 0 20px rgba(230, 184, 100, .1);--glow-strong: 0 0 40px rgba(230, 184, 100, .2);--bg-aurora-1: radial-gradient(ellipse at 30% 0%, rgba(230, 184, 100, .06), transparent 50%);--bg-aurora-2: radial-gradient(ellipse at 70% 100%, rgba(212, 87, 78, .05), transparent 50%)}[data-theme=prism-luxe]{--bg-primary: #1c1c1e;--bg-secondary: #2c2c2e;--bg-tertiary: #3a3a3c;--surface: rgba(255, 255, 255, .06);--surface-hover: rgba(255, 255, 255, .1);--border: rgba(255, 255, 255, .1);--border-strong: rgba(0, 217, 192, .4);--text-primary: #f5f5f7;--text-secondary: #98989f;--text-muted: #636366;--accent: #00d9c0;--accent-2: #ff6b6b;--accent-grad: linear-gradient(135deg, #00d9c0, #ff6b6b);--accent-grad-hover: linear-gradient(135deg, #00bca6, #e85555);--error: #ff6b6b;--success: #00d9c0;--warning: #ffcc00;--cell-given: #f5f5f7;--cell-input: #00d9c0;--cell-selected: rgba(0, 217, 192, .2);--cell-highlight: rgba(0, 217, 192, .06);--cell-same: rgba(255, 107, 107, .15);--cell-conflict: rgba(255, 107, 107, .25);--cell-border: rgba(255, 255, 255, .08);--cell-border-strong: rgba(255, 255, 255, .28);--glow: 0 0 20px rgba(0, 217, 192, .12);--glow-strong: 0 0 40px rgba(0, 217, 192, .2);--bg-aurora-1: radial-gradient(ellipse at 20% 0%, rgba(0, 217, 192, .07), transparent 50%);--bg-aurora-2: radial-gradient(ellipse at 80% 100%, rgba(255, 107, 107, .05), transparent 50%)}.game-view{flex:1;display:flex;flex-direction:column;gap:12px}.game-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px}.game-toolbar__left,.game-toolbar__right{display:flex;align-items:center;gap:8px}.game-timer{font-size:1.5rem;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:.05em;color:var(--text-primary);min-width:100px;text-align:center}.game-badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600}.game-badge--ranked{background:var(--accent-gradient);color:#fff}.game-badge--offline{background:var(--bg-surface);color:var(--text-muted);border:1px solid var(--border-color)}.sudoku-board{display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);aspect-ratio:1;width:100%;max-width:480px;margin:0 auto;background:var(--bg-surface-solid);border:2px solid var(--border-grid-thick);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-card);user-select:none;-webkit-user-select:none}.sudoku-cell{position:relative;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--border-grid);border-bottom:1px solid var(--border-grid);border-top:0;border-left:0;padding:0;appearance:none;-webkit-appearance:none;background:var(--bg-secondary);color:var(--text-primary);cursor:pointer;transition:background-color .15s ease;font-size:clamp(1.1rem,5vw,1.75rem);font-weight:600;font-variant-numeric:tabular-nums;-webkit-tap-highlight-color:transparent}.sudoku-cell:nth-child(9n){border-right:none}.sudoku-cell:nth-child(n+73){border-bottom:none}.sudoku-cell:nth-child(3n):not(:nth-child(9n)){border-right:2px solid var(--border-grid-thick)}.sudoku-cell:nth-child(n+19):nth-child(-n+27),.sudoku-cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--border-grid-thick)}.sudoku-cell--highlighted{background:var(--cell-highlighted)}.sudoku-cell--selected{background:var(--cell-selected)}.sudoku-cell--same-number{background:var(--cell-same-number)}.sudoku-cell--conflict{background:var(--cell-conflict);color:var(--cell-error)}.sudoku-cell--given{color:var(--cell-given)}.sudoku-cell--input{color:var(--cell-input)}.sudoku-cell--paused .sudoku-cell__value{opacity:0}.sudoku-cell__value{line-height:1;transition:opacity .2s ease}.sudoku-cell__notes{position:absolute;inset:2px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);font-size:clamp(.45rem,1.5vw,.65rem);font-weight:500;color:var(--cell-note);pointer-events:none}.sudoku-cell__note{display:flex;align-items:center;justify-content:center;line-height:1}.sudoku-cell__note--active{color:var(--text-secondary)}.game-controls{display:flex;flex-direction:column;gap:10px;max-width:480px;width:100%;margin:0 auto}.game-controls__numbers{display:grid;grid-template-columns:repeat(9,1fr);gap:4px}.game-controls__num{aspect-ratio:1;display:flex;align-items:center;justify-content:center;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-surface);color:var(--text-primary);font-size:clamp(1rem,4vw,1.4rem);font-weight:600;cursor:pointer;transition:var(--transition);font-family:inherit;-webkit-tap-highlight-color:transparent}.game-controls__num:hover{background:var(--bg-surface-hover);border-color:var(--border-strong)}.game-controls__num:active{transform:scale(.92);background:var(--accent-gradient);color:#fff}.game-controls__actions{display:flex;gap:8px}.game-controls__action{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;min-height:56px;border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-surface);color:var(--text-secondary);cursor:pointer;transition:var(--transition);font-family:inherit;font-size:.7rem;justify-content:center;-webkit-tap-highlight-color:transparent}.game-controls__action:hover{background:var(--bg-surface-hover);color:var(--text-primary);border-color:var(--border-strong)}.game-controls__action:active{transform:scale(.96)}.game-controls__action--active{background:var(--accent-gradient);color:#fff;border:none}.game-controls__action-icon{font-size:1.3rem}.game-pause-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0009;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:50;border-radius:var(--radius-md)}.game-pause-overlay__text{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.game-board-wrapper{position:relative;width:100%;max-width:480px;margin:0 auto}.completion-modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#000000b3;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:300;padding:20px}.completion-modal__card{width:100%;max-width:360px;background:var(--bg-elevated);border:1px solid var(--border-strong);border-radius:var(--radius-xl);padding:28px 24px;text-align:center;box-shadow:var(--shadow-glow),var(--shadow-card);animation:modal-in .3s cubic-bezier(.34,1.56,.64,1)}@keyframes modal-in{0%{opacity:0;transform:scale(.85) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}.completion-modal__icon{font-size:3rem;margin-bottom:12px}.completion-modal__title{font-size:1.5rem;font-weight:700;margin-bottom:4px;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.completion-modal__time{font-size:2.5rem;font-weight:800;font-variant-numeric:tabular-nums;margin:16px 0;color:var(--text-primary)}.completion-modal__stats{display:flex;gap:12px;margin-bottom:20px}.completion-modal__stat{flex:1;padding:12px;background:var(--bg-surface);border-radius:var(--radius-md);border:1px solid var(--border-color)}.completion-modal__stat-label{font-size:.75rem;color:var(--text-muted);margin-bottom:4px}.completion-modal__stat-value{font-size:1.2rem;font-weight:700;color:var(--text-primary)}.completion-modal__top5{text-align:left;margin-bottom:20px}.completion-modal__top5-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:8px}.completion-modal__top5-list{list-style:none;display:flex;flex-direction:column;gap:6px}.completion-modal__top5-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:var(--bg-surface);border-radius:var(--radius-sm);font-size:.9rem}.completion-modal__top5-item--you{border:1px solid var(--accent-primary)}.completion-modal__top5-rank{width:24px;font-weight:700;color:var(--text-muted)}.completion-modal__top5-name{flex:1;color:var(--text-primary)}.completion-modal__top5-time{font-variant-numeric:tabular-nums;color:var(--text-secondary)}.leaderboard-panel__title{font-size:1.1rem;font-weight:700;margin-bottom:12px}.leaderboard-panel__list{list-style:none;display:flex;flex-direction:column;gap:6px}.leaderboard-panel__item{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--bg-surface);border-radius:var(--radius-sm);border:1px solid var(--border-color)}.leaderboard-panel__rank{width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:.8rem;font-weight:700;background:var(--bg-surface-hover);color:var(--text-secondary)}.leaderboard-panel__rank--1{background:#ffd70033;color:gold}.leaderboard-panel__rank--2{background:#c0c0c033;color:silver}.leaderboard-panel__rank--3{background:#cd7f3233;color:#cd7f32}.leaderboard-panel__name{flex:1;font-weight:500}.leaderboard-panel__time{font-variant-numeric:tabular-nums;color:var(--text-secondary);font-size:.9rem}.leaderboard-panel__empty{text-align:center;color:var(--text-muted);padding:20px;font-size:.9rem}.leaderboard-panel__stale{font-size:.75rem;color:var(--warning);margin-top:8px;text-align:center}.history-list{display:flex;flex-direction:column;gap:6px}.history-item{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--bg-surface);border-radius:var(--radius-sm);border:1px solid var(--border-color)}.history-item__left{display:flex;align-items:center;gap:8px}.history-item__badge{font-size:.7rem;padding:2px 8px;border-radius:10px;font-weight:600}.history-item__badge--online{background:#22c55e26;color:#22c55e}.history-item__badge--offline{background:#94a3b826;color:#94a3b8}.history-item__time{font-variant-numeric:tabular-nums;font-weight:600}.confirm-dialog{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#000000b3;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:300;padding:20px}.confirm-dialog__card{width:100%;max-width:320px;background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;text-align:center}.confirm-dialog__message{margin:12px 0 20px;color:var(--text-secondary);font-size:.95rem;line-height:1.5}.confirm-dialog__actions{display:flex;gap:10px}.confirm-dialog__actions .btn{flex:1}