:root{--font-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;--font-secondary: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;--font-monospace: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--text-5xl: 3rem;--font-thin: 100;--font-extralight: 200;--font-light: 300;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--font-extrabold: 800;--leading-none: 1;--leading-tight: 1.25;--leading-snug: 1.375;--leading-normal: 1.5;--leading-relaxed: 1.625;--leading-loose: 2;--color-primary-50: #f0f9ff;--color-primary-100: #e0f2fe;--color-primary-200: #bae6fd;--color-primary-300: #7dd3fc;--color-primary-400: #38bdf8;--color-primary-500: #0ea5e9;--color-primary-600: #0284c7;--color-primary-700: #0369a1;--color-primary-800: #075985;--color-primary-900: #0c4a6e;--color-gray-50: #f9fafb;--color-gray-100: #f3f4f6;--color-gray-200: #e5e7eb;--color-gray-300: #d1d5db;--color-gray-400: #9ca3af;--color-gray-500: #6b7280;--color-gray-600: #4b5563;--color-gray-700: #374151;--color-gray-800: #1f2937;--color-gray-900: #111827;--color-error: #ef4444;--color-warning: #f59e0b;--color-success: #10b981;--color-info: #3b82f6;--text-color: var(--color-gray-900);--text-muted: var(--color-gray-500);--background-primary: #ffffff;--background-secondary: var(--color-gray-50);--background-tertiary: var(--color-gray-100);--border-color: var(--color-gray-200);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--spacing-0: 0rem;--spacing-px: 1px;--spacing-0-5: .125rem;--spacing-1: .25rem;--spacing-1-5: .375rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-5: 1.25rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--spacing-10: 2.5rem;--spacing-12: 3rem;--spacing-16: 4rem;--spacing-20: 5rem;--spacing-24: 6rem;--radius-none: 0;--radius-sm: .125rem;--radius-md: .25rem;--radius-lg: .5rem;--radius-xl: .75rem;--radius-2xl: 1rem;--radius-3xl: 1.5rem;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .3s cubic-bezier(.4, 0, .2, 1);--transition-slow: .5s cubic-bezier(.4, 0, .2, 1);--z-0: 0;--z-10: 10;--z-20: 20;--z-30: 30;--z-40: 40;--z-50: 50;--z-dropdown: 1000;--z-sticky: 1100;--z-fixed: 1200;--z-modal: 1300;--z-popover: 1400;--z-tooltip: 1500}@media (prefers-color-scheme: dark){:root{--text-color: var(--color-gray-100);--text-muted: var(--color-gray-400);--background-primary: var(--color-gray-900);--background-secondary: var(--color-gray-800);--background-tertiary: var(--color-gray-700);--border-color: var(--color-gray-700);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -1px rgba(0, 0, 0, .2);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -2px rgba(0, 0, 0, .2);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .4), 0 10px 10px -5px rgba(0, 0, 0, .2)}}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-primary);font-size:var(--text-base);line-height:var(--leading-normal);color:var(--text-color);background-color:var(--background-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden;min-height:100vh;margin:0}h1,h2,h3,h4,h5,h6{margin-top:0;font-weight:var(--font-semibold);line-height:var(--leading-tight);color:var(--text-color)}h1{font-size:var(--text-4xl);margin-bottom:var(--spacing-6)}h2{font-size:var(--text-3xl);margin-bottom:var(--spacing-4)}h3{font-size:var(--text-2xl);margin-bottom:var(--spacing-3)}h4{font-size:var(--text-xl);margin-bottom:var(--spacing-2)}h5{font-size:var(--text-lg);margin-bottom:var(--spacing-2)}h6{font-size:var(--text-base);margin-bottom:var(--spacing-2)}p{margin-bottom:var(--spacing-4)}a{color:var(--color-primary-600);text-decoration:none;font-weight:var(--font-medium);transition:color var(--transition-fast)}a:hover{color:var(--color-primary-700);text-decoration:underline}a:focus{outline:2px solid var(--color-primary-500);outline-offset:2px}input,select,textarea,button{font-family:inherit;font-size:var(--text-base)}input,select,textarea{width:100%;padding:var(--spacing-2) var(--spacing-3);color:var(--text-color);background-color:var(--background-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}input:focus,select:focus,textarea:focus{border-color:var(--color-primary-500);box-shadow:0 0 0 2px var(--color-primary-200);outline:none}button{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-2) var(--spacing-4);font-weight:var(--font-medium);color:var(--color-gray-700);background-color:var(--color-gray-100);border:1px solid var(--color-gray-300);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}button:hover{background-color:var(--color-gray-200);border-color:var(--color-gray-400)}button:focus{outline:2px solid var(--color-primary-500);outline-offset:2px}button.primary{color:#fff;background-color:var(--color-primary-600);border-color:var(--color-primary-700)}button.primary:hover{background-color:var(--color-primary-700);border-color:var(--color-primary-800)}button.success{color:#fff;background-color:var(--color-success);border-color:var(--color-success)}button.success:hover{background-color:#0d9b6c;border-color:#0d9b6c}button.warning{color:#fff;background-color:var(--color-warning);border-color:var(--color-warning)}button.warning:hover{background-color:#dc8f09;border-color:#dc8f09}button.error{color:#fff;background-color:var(--color-error);border-color:var(--color-error)}button.error:hover{background-color:#ed2c2c;border-color:#ed2c2c}button:disabled{opacity:.6;cursor:not-allowed}.container{width:100%;max-width:1280px;margin-left:auto;margin-right:auto;padding-left:var(--spacing-4);padding-right:var(--spacing-4)}.flex{display:flex}.flex-col{flex-direction:column}.justify-center{justify-content:center}.items-center{align-items:center}.gap-2{gap:var(--spacing-2)}.gap-4{gap:var(--spacing-4)}.w-full{width:100%}.max-w-md{max-width:28rem}.text-center{text-align:center}.rounded{border-radius:var(--radius-md)}.shadow{box-shadow:var(--shadow-md)}.bg-card{background-color:var(--background-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--spacing-6)}@media (max-width: 640px){h1{font-size:var(--text-3xl)}h2{font-size:var(--text-2xl)}h3{font-size:var(--text-xl)}.container{padding-left:var(--spacing-4);padding-right:var(--spacing-4)}}@media (min-width: 768px){.md\:flex-row{flex-direction:row}.md\:justify-between{justify-content:space-between}}@media (min-width: 1024px){.lg\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.animate-fadeIn{animation:fadeIn var(--transition-normal) ease-in-out}@keyframes slideInFromBottom{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.animate-slideIn{animation:slideInFromBottom var(--transition-normal) ease-out}.focus-visible:focus{outline:2px solid var(--color-primary-500);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@media print{body{color:#000;background:#fff}a{color:#000;text-decoration:underline}button,input[type=button],input[type=submit]{display:none}}:root{--primary-color: #3498db;--primary-hover: #2980b9;--success-color: #2ecc71;--warning-color: #f39c12;--danger-color: #e74c3c;--light-gray: #f5f5f5;--medium-gray: #e0e0e0;--dark-gray: #7f8c8d;--text-color: #2c3e50;--background-color: #f9f9f9;--card-background: #ffffff;--border-color: #ecf0f1;--sidebar-width: 250px;--header-height: 60px;--shadow: 0 2px 10px rgba(0, 0, 0, .1);--transition: all .3s ease;--priority-urgent: #e53935;--priority-high: #fb8c00;--priority-medium: #fdd835;--priority-low: #43a047}[data-theme=dark]{--primary-color: #3498db;--primary-hover: #2980b9;--success-color: #2ecc71;--warning-color: #f39c12;--danger-color: #e74c3c;--light-gray: #2c3e50;--medium-gray: #34495e;--dark-gray: #95a5a6;--text-color: #ecf0f1;--background-color: #1a1a1a;--card-background: #2c3e50;--border-color: #34495e;--shadow: 0 2px 10px rgba(0, 0, 0, .3)}*{margin:0;padding:0;box-sizing:border-box;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}body{background-color:var(--background-color);color:var(--text-color);line-height:1.6}button{cursor:pointer;transition:var(--transition)}input,select,textarea{font-size:16px;padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;background-color:var(--card-background);color:var(--text-color)}.app{display:flex;min-height:100vh}.content-area{flex:1;margin-left:var(--sidebar-width);min-width:0}.main-content{padding:20px;min-height:calc(100vh - var(--header-height))}.sidebar{width:var(--sidebar-width);background-color:var(--card-background);border-right:1px solid var(--border-color);height:100vh;position:fixed;display:flex;flex-direction:column;box-shadow:var(--shadow);z-index:100}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color);text-align:center}.sidebar-header h2{color:var(--primary-color);font-size:1.5rem;font-weight:600}.sidebar-nav{padding:20px 10px;flex:1}.sidebar-nav a{display:block;padding:12px 15px;color:var(--text-color);text-decoration:none;border-radius:6px;margin-bottom:8px;font-weight:500;transition:var(--transition)}.sidebar-nav a:hover{background-color:var(--light-gray)}.sidebar-nav a.active{background-color:var(--primary-color);color:#fff}.sidebar-stats{padding:15px;border-top:1px solid var(--border-color);display:flex;justify-content:space-around}.stat-item{text-align:center}.stat-label{font-size:12px;color:var(--dark-gray)}.stat-value{font-size:20px;font-weight:600}.stat-value.overdue{color:var(--danger-color)}.stat-value.today{color:var(--warning-color)}.app-header{height:var(--header-height);background-color:var(--card-background);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:99;box-shadow:var(--shadow)}.header-content{display:flex;justify-content:space-between;align-items:center;padding:0 20px;height:100%}.header-left{display:flex;align-items:center}.header-left h1{font-size:1.5rem;font-weight:500}.mobile-menu-button{display:none;background:none;border:none;font-size:1.5rem;margin-right:15px}.header-right{display:flex;align-items:center}.search-container{margin-right:15px}.search-input{width:250px;padding:8px 12px;border-radius:20px}.theme-toggle{background:none;border:none;font-size:1.2rem;padding:5px;border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center}.theme-toggle:hover{background-color:var(--light-gray)}.mobile-nav{display:none}.task-item{background-color:var(--card-background);border-radius:8px;margin-bottom:12px;box-shadow:var(--shadow);transition:var(--transition)}.task-header{padding:12px 15px;display:flex;align-items:center;cursor:pointer}.task-checkbox-container{margin-right:15px}.task-checkbox{width:20px;height:20px;cursor:pointer}.task-content{flex:1;min-width:0}.task-title-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:5px}.task-text{font-size:16px;font-weight:500;word-break:break-word}.task-item.completed .task-text{text-decoration:line-through;color:var(--dark-gray)}.task-priority{font-size:12px;padding:3px 8px;border-radius:12px;font-weight:600}.priority-urgent{background-color:var(--priority-urgent);color:#fff}.priority-high{background-color:var(--priority-high);color:#fff}.priority-medium{background-color:var(--priority-medium);color:#333}.priority-low{background-color:var(--priority-low);color:#fff}.task-meta{display:flex;font-size:12px;color:var(--dark-gray);gap:15px}.task-category{border-radius:10px;padding:2px 6px;background-color:var(--medium-gray)}.task-due-date{font-style:italic}.task-actions{display:flex;gap:8px}.edit-button,.delete-button{background:none;border:none;padding:5px 8px;border-radius:4px;font-size:14px}.edit-button{color:var(--primary-color)}.delete-button{color:var(--danger-color)}.edit-button:hover,.delete-button:hover{background-color:var(--light-gray)}.task-details{padding:0 15px 15px 50px;border-top:1px solid var(--border-color)}.task-notes{margin-top:10px}.task-notes h4{margin-bottom:5px;font-size:14px;color:var(--dark-gray)}.task-edit-form{padding:15px;width:100%}.form-row{margin-bottom:10px;display:flex;gap:10px}.edit-input-full{width:100%;padding:8px 12px}.edit-select,.edit-date{flex:1;padding:8px 12px}.edit-textarea{width:100%;min-height:60px;padding:8px 12px;resize:vertical}.form-actions{display:flex;justify-content:flex-end;gap:10px}.save-button,.cancel-button{padding:8px 15px;border-radius:4px;border:none;font-weight:500}.save-button{background-color:var(--success-color);color:#fff}.cancel-button{background-color:var(--medium-gray);color:var(--text-color)}.save-button:hover{background-color:#27ae60}.task-item.overdue{border-left:4px solid var(--danger-color)}.task-form-container{margin-bottom:20px;background-color:var(--card-background);border-radius:8px;padding:15px;box-shadow:var(--shadow)}.task-form{width:100%}.form-main-row{display:flex;gap:10px;margin-bottom:10px}.task-input{flex:1;padding:10px 15px;border:1px solid var(--border-color);border-radius:4px;font-size:16px}.add-button{background-color:var(--primary-color);color:#fff;border:none;padding:10px 20px;border-radius:4px;font-weight:500;font-size:16px}.add-button:hover{background-color:var(--primary-hover)}.form-expanded{border-top:1px solid var(--border-color);padding-top:15px}.form-group{display:flex;flex-direction:column;flex:1}.form-group label{margin-bottom:5px;font-size:14px;color:var(--dark-gray)}.form-select,.form-date{width:100%}.form-textarea{width:100%;min-height:80px;resize:vertical}.collapse-form-button{background:none;border:none;color:var(--dark-gray);padding:5px 10px}.collapse-form-button:hover{text-decoration:underline}.filter-controls{background-color:var(--card-background);border-radius:8px;padding:15px;margin-bottom:15px;display:flex;flex-wrap:wrap;gap:20px;box-shadow:var(--shadow)}.filter-section{display:flex;flex-direction:column;min-width:150px}.filter-section label{margin-bottom:5px;font-size:14px;color:var(--dark-gray)}.filter-buttons{display:flex;gap:5px}.filter-buttons button{background:none;border:1px solid var(--border-color);padding:5px 10px;border-radius:4px}.filter-buttons button.active{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color)}.filter-select{width:100%}.task-count{margin-bottom:15px;font-size:14px;color:var(--dark-gray)}.empty-state{padding:20px;text-align:center;color:var(--dark-gray);background-color:var(--card-background);border-radius:8px;box-shadow:var(--shadow)}.dashboard-page{display:flex;flex-direction:column;gap:20px}.dashboard-add-task{margin-bottom:20px}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}.dashboard-section{background-color:var(--card-background);border-radius:8px;padding:15px;box-shadow:var(--shadow)}.section-title{margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid var(--border-color);font-size:18px;font-weight:600}.analytics-page{display:flex;flex-direction:column;gap:20px}.time-filter{background-color:var(--card-background);border-radius:8px;padding:15px;margin-bottom:5px;box-shadow:var(--shadow)}.time-buttons{display:flex;gap:10px;margin-top:10px}.time-buttons button{background:none;border:1px solid var(--border-color);padding:8px 15px;border-radius:4px;flex:1}.time-buttons button.active{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color)}.analytics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}.analytics-card{background-color:var(--card-background);border-radius:8px;padding:15px;box-shadow:var(--shadow)}.analytics-card h3{margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid var(--border-color)}.summary-card{grid-column:1 / -1}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:15px}.stat-item{text-align:center;padding:15px;border-radius:8px;background-color:var(--light-gray)}.stat-value{font-size:24px;font-weight:700;margin-bottom:5px}.stat-label{font-size:14px;color:var(--dark-gray)}.chart-container{display:flex;flex-direction:column;gap:10px}.chart-bar-item{display:flex;align-items:center;gap:10px}.chart-label{width:80px;font-size:14px;text-align:right}.chart-bar-container{flex:1;height:20px;background-color:var(--light-gray);border-radius:10px;overflow:hidden}.chart-bar{height:100%;min-width:2px;border-radius:10px}.chart-value{width:40px;font-size:14px;font-weight:600}.completion-time{display:flex;justify-content:center;align-items:center;min-height:100px}.stat-highlight{text-align:center}.big-number{font-size:42px;font-weight:700;display:block;margin-bottom:5px;color:var(--primary-color)}.label{color:var(--dark-gray);font-size:14px}.settings-page{display:flex;flex-direction:column;gap:20px}.settings-section{background-color:var(--card-background);border-radius:8px;padding:20px;box-shadow:var(--shadow)}.settings-section h3{margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid var(--border-color)}.settings-option{display:flex;justify-content:space-between;align-items:center;padding:10px 0}.theme-toggle-container{display:flex;align-items:center;gap:10px}.switch{position:relative;display:inline-block;width:50px;height:24px}.switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:var(--medium-gray);transition:var(--transition)}.slider:before{position:absolute;content:"";height:16px;width:16px;left:4px;bottom:4px;background-color:#fff;transition:var(--transition)}input:checked+.slider{background-color:var(--primary-color)}input:checked+.slider:before{transform:translate(26px)}.slider.round{border-radius:24px}