body{margin:0;min-width:320px;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{width:100%}:root{--background-color: #f8fafc;--text-color: #1a1a1a;--card-background: #ffffff;--border-color: #e2e8f0;--primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--shadow-light: 0 4px 20px rgba(0, 0, 0, .08);--shadow-medium: 0 8px 32px rgba(0, 0, 0, .12);--shadow-heavy: 0 12px 48px rgba(0, 0, 0, .15);--blue-accent: #3b82f6;--green-accent: #22c55e;--red-accent: #ef4444;--yellow-accent: #eab308;--orange-accent: #f97316;--purple-accent: #8b5cf6;--gray-accent: #6b7280;--blue-bg: rgba(59, 130, 246, .1);--green-bg: rgba(34, 197, 94, .1);--red-bg: rgba(239, 68, 68, .1);--yellow-bg: rgba(234, 179, 8, .1);--orange-bg: rgba(249, 115, 22, .1);--purple-bg: rgba(139, 92, 246, .1);--gray-bg: rgba(107, 114, 128, 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#2d3748;--border-color: #4a5568;--shadow-light: 0 4px 20px rgba(0, 0, 0, .3);--shadow-medium: 0 8px 32px rgba(0, 0, 0, .4);--text-muted: #9ca3af;--text-secondary: #6b7280;--bg-subtle: #2d3748;--hover-bg: #374151;--primary-bg: rgba(59, 130, 246, .1);--secondary-bg: #374151;--blue-bg: rgba(59, 130, 246, .15);--green-bg: rgba(34, 197, 94, .15);--red-bg: rgba(239, 68, 68, .15);--yellow-bg: rgba(234, 179, 8, .15);--orange-bg: rgba(249, 115, 22, .15);--purple-bg: rgba(139, 92, 246, .15);--gray-bg: rgba(107, 114, 128, .15);--blue-shadow: 0 4px 12px rgba(59, 130, 246, .4);--green-shadow: 0 4px 12px rgba(34, 197, 94, .4);--red-shadow: 0 4px 12px rgba(239, 68, 68, .4);--yellow-shadow: 0 4px 12px rgba(234, 179, 8, .4);--orange-shadow: 0 4px 12px rgba(249, 115, 22, .4);--purple-shadow: 0 4px 12px rgba(139, 92, 246, .4);--gray-shadow: 0 4px 12px rgba(107, 114, 128, .4);--blue-border: rgba(59, 130, 246, .4);--green-border: rgba(34, 197, 94, .4);--red-border: rgba(239, 68, 68, .4);--yellow-border: rgba(234, 179, 8, .4);--orange-border: rgba(249, 115, 22, .4);--purple-border: rgba(139, 92, 246, .4);--gray-border: rgba(107, 114, 128, .4)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;font-size:var(--font-size-base);font-weight:var(--font-weight-normal);line-height:1.6;color:var(--text-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,.h1{font-size:var(--font-size-4xl);font-weight:var(--font-weight-bold);line-height:1.2;margin:0 0 var(--space-4) 0;color:var(--text-primary)}h2,.h2{font-size:var(--font-size-3xl);font-weight:var(--font-weight-bold);line-height:1.3;margin:0 0 var(--space-4) 0;color:var(--text-primary)}h3,.h3{font-size:var(--font-size-2xl);font-weight:var(--font-weight-semibold);line-height:1.4;margin:0 0 var(--space-3) 0;color:var(--text-primary)}h4,.h4{font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);line-height:1.4;margin:0 0 var(--space-3) 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var(--transition-base);position:relative;overflow:hidden;-webkit-user-select:none;user-select:none;white-space:nowrap;gap:var(--space-2)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn:not(:disabled):hover{transform:translateY(-1px)}.btn:not(:disabled):active{transform:translateY(0)}.btn-small{padding:var(--space-2) var(--space-3);font-size:var(--font-size-sm);min-height:32px}.btn-medium{padding:var(--space-3) var(--space-4);font-size:var(--font-size-base);min-height:40px}.btn-large{padding:var(--space-4) 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UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:var(--text-color);background:var(--background-color);width:100%;min-height:100vh;transition:background-color .3s ease,color .3s ease}.app{width:100%;min-height:100vh;display:flex;flex-direction:column}.app-header{background:var(--primary-gradient);color:#fff;padding:var(--space-4) var(--space-8);display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow-light);position:sticky;top:0;z-index:100;width:100%}.app-header h1{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);margin:0}.header-controls{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.theme-toggle{background:var(--bg-subtle);color:#fff;border:2px solid var(--border-color);border-radius:var(--radius-md);padding:var(--space-3);font-size:var(--font-size-xl);cursor:pointer;transition:all var(--transition-base);display:flex;align-items:center;justify-content:center;min-width:44px;min-height:44px}.theme-toggle:hover{background:var(--hover-bg);border-color:var(--border-color);transform:scale(1.05)}.app-container{flex:1;padding:2rem;width:100%;display:flex;flex-direction:column}@media (min-width: 1200px){.app-container{max-width:1400px;margin:0 auto}}@media (min-width: 1600px){.app-container{max-width:none;margin:0}}.page-container{background:var(--card-background);border-radius:16px;padding:2rem;box-shadow:var(--shadow-light);border:1px solid var(--border-color);margin-bottom:2rem;width:100%;transition:background-color .3s ease,border-color .3s ease}.page-container h2{font-size:1.75rem;font-weight:700;color:var(--text-color);margin-bottom:.5rem}.page-container p{color:var(--text-color);margin-bottom:1.5rem;opacity:.8}.undo-notification{position:fixed;top:20px;right:20px;background:var(--card-background);color:var(--text-color);padding:1rem 1.5rem;border-radius:12px;box-shadow:var(--shadow-medium);display:flex;align-items:center;gap:1rem;z-index:1000;animation:slideIn .3s ease;border:1px solid var(--border-color)}.undo-button{background:var(--blue-accent);color:#fff;border:none;padding:.5rem 1rem;border-radius:8px;cursor:pointer;font-weight:600;transition:all .2s ease}.undo-button:hover{background:var(--blue-accent);transform:translateY(-1px)}@media (min-width: 1440px){.app-container{max-width:1400px;margin:0 auto}.page-container{max-width:1200px;margin:0 auto}}@media (max-width: 1440px){.app-container{padding:2rem}}@media (max-width: 1024px){.app-container{padding:1.5rem}.theme-toggle{padding:.4rem .6rem;font-size:1.1rem;min-width:40px;min-height:40px}}@media (max-width: 768px){.app-header{padding:1rem}.app-header h1{font-size:1.25rem}.app-container{padding:1rem}.page-container{padding:1.5rem}.theme-toggle{padding:.375rem .5rem;font-size:1rem;min-width:36px;min-height:36px}.undo-notification{top:10px;right:10px;left:10px;padding:.75rem 1rem}}@media (max-width: 480px){.app-header{flex-direction:column;gap:.5rem;padding:.75rem}.app-container{padding:.75rem}.page-container{padding:1rem}.theme-toggle{padding:.3rem .4rem;font-size:.9rem;min-width:32px;min-height:32px}}@media (max-width: 360px){.app-container{padding:.5rem}.page-container{padding:.75rem}.theme-toggle{padding:.25rem .3rem;font-size:.8rem;min-width:28px;min-height:28px}}.modal-overlay{position:fixed;inset:0;background:var(--bg-subtle);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.clear-data-modal{background:var(--card-background);border-radius:20px;width:100%;max-width:500px;box-shadow:var(--shadow-medium);border:1px solid var(--border-color);overflow:hidden;animation:modalSlideIn .3s ease-out}@keyframes 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1rem;margin:.5rem 0;background:var(--red-bg);border:1px solid var(--red-border);border-radius:12px;color:var(--text-color);font-weight:500;display:flex;align-items:center;gap:.75rem}.final-warning{text-align:center;color:var(--red-accent);font-size:1.1rem;margin:1.5rem 0 0;padding:1rem;background:var(--red-bg);border-radius:12px;border:1px solid var(--red-border)}.modal-actions{display:flex;gap:1rem;padding:1.5rem 2rem 2rem;border-top:1px solid var(--border-color);background:var(--bg-subtle)}.modal-actions .cancel-btn,.modal-actions .demo-btn,.modal-actions .danger-btn,.modal-actions .confirm-btn{flex:1;min-width:0;display:flex;align-items:center;justify-content:center;text-align:center}.cancel-btn{flex:1;padding:1rem 1.5rem;border:2px solid var(--border-color);border-radius:12px;background:var(--card-background);color:var(--text-color);font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s 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h4{color:var(--text-primary);margin-bottom:15px;font-size:1.2rem}.feature-category ul{list-style:none;padding:0;margin:0}.feature-category li{color:var(--text-secondary);line-height:1.5;position:relative;padding:5px 0 5px 20px}.feature-category li:before{content:"✓";position:absolute;left:0;top:5px;color:var(--accent-color);font-weight:700}.about-tech{background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:12px;padding:20px;margin-bottom:20px}.about-tech h4{color:var(--text-primary);margin-bottom:10px;font-size:1.2rem}.about-tech p{margin:0;color:var(--text-secondary)}.about-privacy{background:var(--bg-tertiary);border:2px solid #10b981;border-radius:12px;padding:20px}.about-privacy h4{color:var(--text-primary);margin-bottom:10px;font-size:1.2rem}.about-privacy p{margin:0;color:var(--text-secondary);line-height:1.6}@media (min-width: 1440px){.help-support-page{max-width:1200px;margin:0 auto}}@media (max-width: 1440px){.help-support-page{padding:2rem}}@media (max-width: 1024px){.help-support-page{padding:1.5rem}.features-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}}@media (max-width: 768px){.help-support-page{padding:15px}.help-header h1{font-size:2rem}.help-navigation{flex-direction:column;align-items:center}.help-nav-btn{width:100%;max-width:300px;justify-content:center}.help-content{padding:20px}.features-grid{grid-template-columns:1fr}.step-card{flex-direction:column;text-align:center}.step-header{justify-content:center}.faq-question,.troubleshooting-item{padding:15px}}[data-theme=dark] .help-support-page{--bg-secondary: #1f2937;--bg-tertiary: #111827;--border-color: #374151;--text-primary: #f9fafb;--text-secondary: #d1d5db;--accent-color: #8b5cf6}[data-theme=light] .help-support-page{--bg-secondary: #ffffff;--bg-tertiary: #f3f4f6;--border-color: #e5e7eb;--text-primary: #111827;--text-secondary: #6b7280;--accent-color: 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scale(1)}}.floating-add-button{animation:floatIn .3s ease-out}.floating-add-task-btn{position:fixed;bottom:var(--space-8);right:var(--space-8);background:var(--primary-gradient);color:#fff;border:none;border-radius:var(--radius-full);width:60px;height:60px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-medium);transition:all var(--transition-slow);z-index:1000;padding:0;margin:0;text-align:center}.floating-add-task-btn:hover{transform:translateY(-5px) scale(1.02);box-shadow:0 10px 25px #0003}.floating-add-task-btn .btn-icon{font-size:var(--font-size-3xl);font-weight:var(--font-weight-normal);line-height:1;display:flex;align-items:center;justify-content:center;width:100%;height:100%;margin:0;padding:0}.task-modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0009;display:flex;justify-content:center;align-items:center;z-index:2000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);animation:fadeIn .3s 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