:root{--bg: #111827;--surface: #1f2937;--surface-hover: #263040;--border: #374151;--text: #f9fafb;--text-muted: #9ca3af;--accent: #3b82f6;--accent-hover: #2563eb;--danger: #ef4444;--danger-hover: #dc2626;--warning: #f59e0b;--success: #10b981;--sidebar-width: 220px;--header-height: 52px;--radius: 8px;--radius-sm: 4px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit;font-size:inherit}input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}.app-layout{display:flex;height:100%;overflow:hidden}.sidebar{width:var(--sidebar-width);flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;height:100%;overflow-y:auto;overflow-x:hidden;z-index:100;transition:transform .25s ease}.sidebar-title{font-size:16px;font-weight:700;color:var(--text);padding:20px 16px 16px;letter-spacing:.02em;border-bottom:1px solid var(--border)}.sidebar-section{padding:12px 0;border-bottom:1px solid var(--border)}.sidebar-section-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);padding:4px 16px 8px}.sidebar-nav{display:flex;flex-direction:column;gap:2px;padding:8px}.sidebar-nav a,.sidebar-nav-link{display:block;padding:8px 10px;border-radius:var(--radius-sm);color:var(--text-muted);font-size:14px;transition:background .15s,color .15s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-nav a:hover,.sidebar-nav-link:hover{background:var(--surface-hover);color:var(--text)}.sidebar-nav a.active{background:#3b82f626;color:var(--accent);font-weight:500}.sidebar-footer{margin-top:auto;padding:16px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:8px}.sidebar-footer-username{font-size:13px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.main-content{flex:1;overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column}.page-header{padding:24px 24px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.page-title{font-size:22px;font-weight:700;color:var(--text)}.page-body{padding:20px 24px 40px}.mobile-header{display:none;height:var(--header-height);background:var(--surface);border-bottom:1px solid var(--border);align-items:center;padding:0 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var(--border);color:var(--text);padding:5px 10px;border-radius:var(--radius-sm);cursor:pointer}.sort-select:focus{outline:2px solid var(--accent);outline-offset:1px}.task-count{color:var(--text-muted);font-size:13px;margin-left:auto}.task-list{display:flex;flex-direction:column;gap:8px}.task-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;display:flex;align-items:flex-start;gap:12px;transition:border-color .15s}.task-item:hover{border-color:#4b5563}.task-item:hover .task-actions{opacity:1}.status-circle{width:22px;height:22px;border-radius:50%;border:2px solid var(--border);flex-shrink:0;cursor:pointer;display:flex;align-items:center;justify-content:center;margin-top:1px;transition:border-color .15s,background .15s;font-size:12px;font-weight:700;color:transparent}.status-circle:hover{border-color:var(--accent)}.status-circle.todo{border-color:var(--border);background:transparent}.status-circle.in_progress{border-color:var(--warning);background:#f59e0b26}.status-circle.done{border-color:var(--success);background:var(--success);color:#fff}.task-body{flex:1;min-width:0}.task-title{font-size:14px;font-weight:500;color:var(--text);word-break:break-word}.task-title.done{text-decoration:line-through;color:var(--text-muted)}.task-meta{display:flex;align-items:center;gap:8px;margin-top:5px;flex-wrap:wrap}.task-description{font-size:13px;color:var(--text-muted);margin-top:5px;word-break:break-word;cursor:pointer}.task-description-toggle{font-size:12px;color:var(--accent);background:none;border:none;padding:0;margin-top:2px;cursor:pointer}.task-actions{display:flex;gap:4px;flex-shrink:0;opacity:0;transition:opacity .15s}.task-action-btn{background:none;border:none;color:var(--text-muted);padding:4px 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