:root{--color-category-0: #2196F3;--color-category-1: #FFC107;--color-category-2: #4CAF50;--color-category-3: #9C27B0;--color-category-4: #FF5722;--color-category-5: #00BCD4;--color-category-6: #E91E63;--color-category-7: #8BC34A;--color-category-8: #FF9800;--color-category-9: #673AB7;--color-category-0-dark: #1976D2;--color-category-1-dark: #FFA000;--color-category-2-dark: #388E3C;--color-category-3-dark: #7B1FA2;--color-category-4-dark: #E64A19;--color-category-5-dark: #0097A7;--color-category-6-dark: #C2185B;--color-category-7-dark: #689F38;--color-category-8-dark: #F57C00;--color-category-9-dark: #512DA8}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:#fafafa;color:#333;line-height:1.6;min-height:100vh;display:flex;flex-direction:column;transition:background-color .8s 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3px #0003}}@media(max-width:768px){.stack-area{gap:12px}.stack-area:not(:empty){min-height:50px;padding:8px}.pair-stack{width:45px;height:30px}.stack-card{width:45px;height:30px;font-size:8px}.stack-card:nth-child(2){transform:translate(1px,-2px) rotate(2deg)}.stack-card:nth-child(3){transform:translate(-1px,-4px) rotate(-1deg)}.stack-card:nth-child(4){transform:translate(2px,-6px) rotate(3deg)}.stack-card:nth-child(5){transform:translate(-1px,-8px) rotate(-2deg)}.stack-card:nth-child(6){transform:translate(1px,-10px) rotate(1deg)}.stack-card:nth-child(7){transform:translate(-1px,-12px) rotate(-1deg)}.pair-stack.complete{width:75px}.pair-stack.complete .stack-card:last-child{padding:3px 6px;font-size:9px}}@media(max-width:375px){.pair-stack{width:40px;height:26px}.stack-card{width:40px;height:26px;font-size:7px}}footer{text-align:center;padding:30px 20px;margin-top:auto;font-size:.85rem}footer a{color:var(--text-secondary, #666);text-decoration:none}footer a:hover{text-decoration:underline}.calendar-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000}.calendar-modal{background:var(--bg-color, #fff);border-radius:12px;padding:20px;max-width:400px;width:90%;max-height:90vh;overflow-y:auto;position:relative}.calendar-modal h2{margin:0 0 16px;text-align:center}.calendar-close-btn{position:absolute;top:10px;right:10px;background:none;border:none;font-size:24px;cursor:pointer;color:var(--text-color, #333)}.calendar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.calendar-nav-btn{background:var(--button-bg, #e0e0e0);border:none;border-radius:8px;padding:8px 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#d0d0d0)}.calendar-day.completed{background:var(--success-bg, #d4edda);color:#1a5928}.calendar-day.in-progress{background:var(--in-progress-bg, #fff9c4);color:#6d5c00}.calendar-day.today{border:2px solid var(--accent-color, #007bff)}.calendar-check{font-size:10px;color:var(--success-color, #28a745);position:absolute;bottom:2px;right:4px}#calendar-btn{position:fixed;top:128px;right:20px;width:44px;height:44px;border-radius:50%;border:2px solid var(--border-default, #d0d0d0);background-color:var(--button-bg, #ffffff);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.3rem;transition:all .2s ease;z-index:1000;box-shadow:var(--shadow-sm, 0 2px 4px rgba(0,0,0,.1))}#calendar-btn:hover{border-color:var(--border-hover, #aaa);transform:scale(1.05)}#calendar-btn:focus{outline:2px solid var(--border-focus, #007bff);outline-offset:2px}.completion-time{font-size:18px;color:var(--text-muted, #666);margin:8px 0 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#e0e0e0;--selected-bg: #e3f2fd;--selected-border: #2196f3;--success-bg: #e8f5e9;--success-color: #4caf50;--shadow-sm: 0 4px 8px rgba(0, 0, 0, .1);--shadow-md: 0 4px 16px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 20px rgba(0, 0, 0, .3);--category-bg-0: #e3f2fd;--category-bg-1: #fff8e1;--category-bg-2: #e8f5e9;--category-bg-3: #f3e5f5;--category-bg-4: #fbe9e7;--category-bg-5: #e0f7fa;--category-bg-6: #fce4ec;--category-bg-7: #f1f8e9;--category-bg-8: #fff3e0;--category-bg-9: #ede7f6}[data-theme=dark]{--bg-primary: #1a1a1a;--bg-secondary: #2d2d2d;--bg-tertiary: #3a3a3a;--bg-modal: rgba(0, 0, 0, .8);--text-primary: #e0e0e0;--text-secondary: #b0b0b0;--text-header: #ffffff;--text-success: #66bb6a;--border-default: #404040;--border-hover: #666666;--border-focus: #42a5f5;--button-bg: #2d2d2d;--button-hover-bg: #353535;--button-selected-bg: #1e3a5f;--button-paired-bg: #3a3a3a;--button-error-bg: #4a2020;--primary-color: #42a5f5;--primary-hover: #1e88e5;--error-color: #ef5350;--card-bg: #2d2d2d;--card-border: #404040;--selected-bg: #1e3a5f;--selected-border: #42a5f5;--success-bg: #1b4d1b;--success-color: #66bb6a;--shadow-sm: 0 4px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 4px 20px rgba(0, 0, 0, .6);--category-bg-0: #1a2530;--category-bg-1: #2e2a1a;--category-bg-2: #1a2e1f;--category-bg-3: #2a1e2e;--category-bg-4: #2e221e;--category-bg-5: #1a2a2e;--category-bg-6: #2e1e25;--category-bg-7: #252e1e;--category-bg-8: #2e261a;--category-bg-9: #251e2e}body{background-color:var(--bg-primary);color:var(--text-primary)}body.category-bg-0{background-color:var(--category-bg-0)}body.category-bg-1{background-color:var(--category-bg-1)}body.category-bg-2{background-color:var(--category-bg-2)}body.category-bg-3{background-color:var(--category-bg-3)}body.category-bg-4{background-color:var(--category-bg-4)}body.category-bg-5{background-color:var(--category-bg-5)}body.category-bg-6{background-color:var(--category-bg-6)}body.category-bg-7{background-color:var(--category-bg-7)}body.category-bg-8{background-color:var(--category-bg-8)}body.category-bg-9{background-color:var(--category-bg-9)}header h1{color:var(--text-header)}header .date{color:var(--text-secondary)}.instructions p,.instructions h2{color:var(--text-header)}#hints-toggle{border-color:var(--border-default);color:var(--text-secondary)}#hints-toggle:hover{border-color:var(--border-hover);color:var(--text-primary)}#hints-names,#hints-full div{color:var(--text-secondary)}#hints-full strong{color:var(--text-primary)}.word-button{background-color:var(--button-bg);border-color:var(--border-default);color:var(--text-primary)}.word-button:hover{border-color:var(--border-hover);box-shadow:var(--shadow-sm)}.word-button.selected{background-color:var(--button-selected-bg);border-color:var(--border-focus)}.word-button.paired{background-color:var(--button-paired-bg)}.word-button.shake{background-color:var(--button-error-bg)!important;border-color:var(--error-color)!important}.notification{background-color:var(--bg-modal)}.notification-content{background-color:var(--bg-secondary);box-shadow:var(--shadow-lg)}.notification-content h2{color:var(--text-success)}.notification-content p{color:var(--text-header)}.notification-subtitle{color:var(--text-secondary)!important}#victory-screen{background-color:var(--bg-secondary);box-shadow:var(--shadow-md)}#victory-screen h2{color:var(--text-success)}#victory-screen #share-display{background-color:var(--bg-tertiary);border-color:var(--border-default);color:var(--text-primary)}#victory-screen button{background-color:var(--primary-color)}#victory-screen button:hover{background-color:var(--primary-hover)}#share-copy-feedback{color:var(--text-success)}#error-screen{background-color:var(--bg-secondary);box-shadow:var(--shadow-md)}#error-screen button{background-color:var(--primary-color)}#error-screen button:hover{background-color:var(--primary-hover)}.modal{background-color:var(--bg-modal)}.modal-content{background-color:var(--bg-secondary);box-shadow:var(--shadow-lg)}.modal-content textarea{background-color:var(--bg-tertiary);border-color:var(--border-default);color:var(--text-primary)}.modal-buttons button{background-color:var(--primary-color)}.modal-buttons button:hover{background-color:var(--primary-hover)}#copy-feedback{color:var(--text-success)}.theme-toggle{position:fixed;top:20px;right:20px;width:44px;height:44px;border-radius:50%;border:2px solid var(--border-default);background-color:var(--button-bg);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.5rem;transition:all .2s ease;z-index:1000;box-shadow:var(--shadow-sm)}.theme-toggle:hover{border-color:var(--border-hover);transform:scale(1.05)}.theme-toggle:focus{outline:2px solid var(--border-focus);outline-offset:2px}.theme-toggle:before{content:"☀️"}[data-theme=dark] .theme-toggle:before{content:"🌙"}.audio-toggle{position:fixed;top:74px;right:20px;width:44px;height:44px;border-radius:50%;border:2px solid var(--border-default);background-color:var(--button-bg);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.3rem;transition:all .2s ease;z-index:1000;box-shadow:var(--shadow-sm)}.audio-toggle:hover{border-color:var(--border-hover);transform:scale(1.05)}.audio-toggle:focus{outline:2px solid var(--border-focus);outline-offset:2px}.audio-toggle:before{content:"🔊"}.audio-toggle.muted:before{content:"🔇"}.audio-toggle.music-toggle:before{content:"🎵"}.audio-toggle.sfx-toggle:before{content:"🔊"}.audio-toggle.music-toggle.muted:before{content:"🎵";opacity:.35;filter:grayscale(100%)}.audio-toggle.sfx-toggle.muted:before{content:"🔇"}.audio-toggle.music-toggle{right:68px}.audio-toggle.sfx-toggle{right:20px}.secondary-button{background-color:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border-default)}.secondary-button:hover{background-color:var(--button-hover-bg);border-color:var(--border-hover)}body,.word-button,.theme-toggle,.audio-toggle,.notification-content,#victory-screen,#error-screen,.modal-content{transition:background-color .3s ease,color .3s ease,border-color .3s 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