:root{--primary: #3B82F6;--primary-hover: #2563EB;--primary-active: #1D4ED8;--primary-light: #EFF6FF;--accent-orange: #F59E0B;--accent-green: #22C55E;--accent-red: #EF4444;--bg-primary: #FFFFFF;--bg-secondary: #F9FAFB;--bg-tertiary: #F3F4F6;--bg-hover: #E5E7EB;--bg-active: #D1D5DB;--sidebar-bg: #F9FAFB;--sidebar-text: #1F2937;--sidebar-text-secondary: #6B7280;--text-primary: #1F2937;--text-secondary: #6B7280;--text-tertiary: #9CA3AF;--text-placeholder: #9CA3AF;--text-disabled: #D1D5DB;--border-light: #E5E7EB;--border-default: #D1D5DB;--border-dark: #9CA3AF;--card-bg: #FFFFFF;--success: #22C55E;--success-bg: #F0FDF4;--warning: #F59E0B;--warning-bg: #FFFBEB;--error: #EF4444;--error-bg: #FEF2F2;--info: #3B82F6;--info-bg: #EFF6FF;--priority-high: #EF4444;--priority-medium: #F59E0B;--priority-low: #3B82F6;--priority-none: #9CA3AF;--quadrant-q1-bg: rgba(239, 68, 68, .1);--quadrant-q2-bg: rgba(59, 130, 246, .1);--quadrant-q3-bg: rgba(245, 158, 11, .1);--quadrant-q4-bg: rgba(107, 114, 128, .1);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-hover: 0 4px 6px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--shadow-focus: 0 0 0 3px rgba(59, 130, 246, .3);--radius-none: 0px;--radius-sm: 4px;--radius: 6px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-2xl: 16px;--radius-full: 9999px;--transition: all .2s ease;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace}[data-theme=dark]{--bg-primary: #1F2937;--bg-secondary: #111827;--bg-tertiary: #1E293B;--bg-hover: #374151;--bg-active: #4B5563;--sidebar-bg: #111827;--sidebar-text: #F9FAFB;--sidebar-text-secondary: #9CA3AF;--text-primary: #F9FAFB;--text-secondary: #D1D5DB;--text-tertiary: #9CA3AF;--text-placeholder: #6B7280;--text-disabled: #4B5563;--border-light: #374151;--border-default: #4B5563;--border-dark: #6B7280;--card-bg: #1F2937;--primary: #3B82F6;--primary-hover: #60A5FA;--primary-active: #2563EB;--primary-light: #1E3A5F;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow: 0 1px 3px rgba(0, 0, 0, .4);--shadow-hover: 0 4px 6px rgba(0, 0, 0, .4);--shadow-md: 0 4px 6px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .4);--shadow-focus: 0 0 0 3px rgba(59, 130, 246, .3);--quadrant-q1-bg: rgba(127, 29, 29, .3);--quadrant-q2-bg: rgba(30, 58, 95, .3);--quadrant-q3-bg: rgba(120, 53, 15, .3);--quadrant-q4-bg: rgba(31, 41, 55, .3)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-sans);font-size:14px;line-height:1.5;color:var(--text-primary);background:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#app{height:100%}.app-container{display:flex;height:100vh;width:100vw}.main-area{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg-secondary)}.main-content{flex:1;overflow-y:auto}.sidebar{width:220px;min-width:220px;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;padding:16px 0;border-right:1px solid var(--border-light);overflow-y:auto;height:100vh}.sidebar-header{padding:0 16px 16px;border-bottom:1px solid var(--border-light);margin-bottom:16px}.app-title{font-size:18px;font-weight:600;color:var(--sidebar-text)}.sidebar-section{padding:0 12px;margin-bottom:20px}.sidebar-section-title{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--sidebar-text-secondary);margin-bottom:8px;padding:0 4px}.view-item{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:var(--radius);color:var(--sidebar-text);text-decoration:none;transition:var(--transition);margin-bottom:2px}.view-item:hover{background:var(--bg-hover)}.view-item.active{background:var(--primary-light);color:var(--primary)}.view-icon{font-size:16px}.folder-list,.tag-list,.filter-list{list-style:none}.folder-item,.tag-item,.filter-item{display:flex;align-items:center;padding:8px 12px;border-radius:var(--radius);cursor:pointer;transition:var(--transition);gap:8px}.folder-item:hover,.tag-item:hover,.filter-item:hover{background:var(--bg-hover)}.folder-item.active,.tag-item.active,.filter-item.active{background:var(--primary-light);color:var(--primary)}.folder-icon,.filter-icon{font-size:14px}.folder-name,.filter-text,.tag-name{flex:1;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.folder-count,.filter-count{font-size:12px;background:var(--bg-tertiary);padding:2px 8px;border-radius:10px;color:var(--text-secondary)}.tag-color{width:10px;height:10px;border-radius:50%;flex-shrink:0}.sidebar-footer{margin-top:auto;padding:12px;border-top:1px solid var(--border-light)}.settings-link{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:var(--radius);color:var(--sidebar-text-secondary);text-decoration:none;transition:all .15s ease}.settings-link:hover{background:var(--bg-hover);color:var(--sidebar-text)}.settings-link.active{background:var(--primary-light);color:var(--primary)}.settings-icon{font-size:16px}.settings-label{font-size:14px}.toolbar{display:flex;align-items:center;gap:16px;padding:12px 16px;background:var(--card-bg);border-bottom:1px solid var(--border-light)}.search-container{position:relative;flex:1;max-width:300px}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);font-size:14px}.search-input{width:100%;padding:8px 12px 8px 36px;border:1px solid var(--border-light);border-radius:var(--radius);font-size:14px;background:var(--bg-primary);color:var(--text-primary);transition:var(--transition)}.search-input:focus{outline:none;border-color:var(--primary);box-shadow:var(--shadow-focus)}.search-input::placeholder{color:var(--text-placeholder)}.toolbar-center{display:flex;gap:8px}.sort-filter,.priority-filter{padding:8px 12px;border:1px solid var(--border-light);border-radius:var(--radius);font-size:14px;background:var(--bg-primary);color:var(--text-primary);cursor:pointer}.sort-filter:focus,.priority-filter:focus{outline:none;border-color:var(--primary)}.toolbar-actions{display:flex;align-items:center;gap:8px}.theme-switcher{display:flex;gap:4px}.theme-btn{padding:6px 8px;background:transparent;border:1px solid var(--border-light);border-radius:var(--radius);cursor:pointer;font-size:14px;transition:var(--transition)}.theme-btn:hover{background:var(--bg-hover)}.theme-btn.active{background:var(--primary-light);border-color:var(--primary)}.btn-icon{padding:8px 12px;background:transparent;border:1px solid var(--border-light);border-radius:var(--radius);cursor:pointer;font-size:14px;transition:var(--transition)}.btn-icon:hover{background:var(--bg-hover)}.btn-primary{padding:8px 16px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;transition:var(--transition)}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{padding:8px 16px;background:transparent;color:var(--text-primary);border:1px solid var(--border-default);border-radius:var(--radius);font-size:14px;cursor:pointer;transition:var(--transition)}.btn-secondary:hover{background:var(--bg-hover)}.stats-bar{display:flex;gap:24px;padding:12px 16px;background:var(--card-bg);border-bottom:1px solid var(--border-light)}.stat-item{display:flex;flex-direction:column;gap:2px}.stat-label{font-size:12px;color:var(--text-secondary)}.stat-value{font-size:18px;font-weight:600;color:var(--text-primary)}.stat-item.completed .stat-value{color:var(--success)}.stat-item.active .stat-value{color:var(--primary)}.stat-item.overdue .stat-value{color:var(--error)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--card-bg);border-radius:var(--radius-xl);width:90%;max-width:500px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-light)}.modal-header h2{font-size:18px;font-weight:600}.modal-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:var(--radius);cursor:pointer;font-size:20px;color:var(--text-secondary);transition:var(--transition)}.modal-close:hover{background:var(--bg-hover);color:var(--text-primary)}.form-group{padding:12px 20px}.form-group label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:6px}.form-group input[type=text],.form-group input[type=datetime-local],.form-group textarea,.form-group select{width:100%;padding:10px 12px;border:1px solid var(--border-light);border-radius:var(--radius);font-size:14px;background:var(--bg-primary);color:var(--text-primary);transition:var(--transition)}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary);box-shadow:var(--shadow-focus)}.form-row{display:flex;gap:12px;flex-wrap:wrap}.form-row .form-group{flex:1;min-width:140px}.form-actions{display:flex;justify-content:flex-end;gap:8px;padding:16px 20px;border-top:1px solid var(--border-light)}.tag-selector{display:flex;flex-wrap:wrap;gap:6px}.tag-btn{display:flex;align-items:center;gap:4px;padding:6px 10px;background:var(--bg-tertiary);border:1px solid var(--border-light);border-radius:var(--radius);cursor:pointer;font-size:13px;transition:var(--transition)}.tag-btn:hover{background:var(--bg-hover)}.tag-btn.selected{background:var(--primary-light);border-color:var(--primary)}.checkbox-label{display:flex;align-items:center;gap:8px;cursor:pointer}.checkbox-label input[type=checkbox]{width:18px;height:18px;cursor:pointer}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-default);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-dark)}*{scrollbar-width:thin;scrollbar-color:var(--border-default) transparent}