:root{--bg: #f7f8f8;--surface: #ffffff;--surface-panel: #f3f4f5;--surface-warm: #fafafa;--fg: #111318;--fg-2: #3d4350;--muted: #6b7280;--meta: #9ca3af;--border: #e5e7eb;--border-soft: #f0f1f3;--accent: #5e6ad2;--accent-on: #ffffff;--accent-hover: #4752c4;--accent-soft: #eeeffc;--success: #16a34a;--success-soft: #e8f7ee;--warn: #d97706;--warn-soft: #fdf3e7;--danger: #dc2626;--danger-soft: #fdefef;--overdue: #9333ea;--overdue-soft: #f5ebfd;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--r-sm: 6px;--r-md: 8px;--r-lg: 12px;--r-pill: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 10px 25px rgba(0, 0, 0, .12);--sidebar-w: 260px}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-body);background-color:var(--bg);color:var(--fg);font-size:14px;line-height:1.5;-webkit-user-select:none;user-select:none;overflow-x:hidden}input,textarea,select,button{font-family:inherit;font-size:inherit;color:inherit}.app-container{display:flex;height:100vh;width:100vw;overflow:hidden;position:relative}.sidebar-backdrop{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:90;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.sidebar{width:var(--sidebar-w);height:100%;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;z-index:100;transition:transform .25s cubic-bezier(.16,1,.3,1)}.sidebar-header{padding:16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-soft)}.sidebar-title{font-size:15px;font-weight:700;letter-spacing:-.01em;display:flex;align-items:center;gap:8px;color:var(--fg)}.sidebar-nav{padding:12px 8px 6px;display:flex;flex-direction:column;gap:2px}.sidebar-tree-container{flex:1;overflow-y:auto;padding:6px 8px}.sidebar-filters{padding:10px 8px;border-top:1px solid var(--border-soft);display:flex;flex-direction:column;gap:3px;background:var(--surface-warm)}.sidebar-footer{padding:10px 12px;border-top:1px solid var(--border-soft);display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}.nav-item,.tree-row{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:var(--r-sm);cursor:pointer;color:var(--fg-2);transition:background-color .12s ease;outline:none}.nav-item:hover,.tree-row:hover{background-color:var(--surface-panel)}.nav-item.active,.tree-row.active{background-color:var(--accent-soft);color:var(--accent);font-weight:600}.tree-row{position:relative;font-size:13.5px}.tree-row.drag-over-inside{background-color:var(--accent-soft);outline:2px dashed var(--accent)}.tree-row.drag-over-before:before{content:"";position:absolute;top:-2px;left:4px;right:4px;height:2px;background:var(--accent);border-radius:1px}.tree-row.drag-over-after:after{content:"";position:absolute;bottom:-2px;left:4px;right:4px;height:2px;background:var(--accent);border-radius:1px}.tree-expander{width:18px;height:18px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--meta);border-radius:4px;flex-shrink:0}.tree-expander:hover{background-color:var(--border);color:var(--fg)}.tree-label{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badge-count{font-size:11px;padding:1px 6px;border-radius:var(--r-pill);background:var(--surface-panel);color:var(--muted);font-weight:500}.filter-item{display:flex;align-items:center;justify-content:space-between;padding:6px 10px;border-radius:var(--r-sm);cursor:pointer;font-size:13px;color:var(--fg-2)}.filter-item:hover{background:var(--surface-panel)}.filter-item.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.filter-badge-urgent{background:var(--danger-soft);color:var(--danger);font-weight:600}.filter-badge-priority{background:var(--warn-soft);color:var(--warn);font-weight:600}.filter-badge-overdue{background:var(--overdue-soft);color:var(--overdue);font-weight:600}.main-content{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden;background:var(--bg);position:relative}.top-bar{padding:12px 20px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:16px;z-index:10}.top-bar-left{display:flex;align-items:center;gap:12px;flex:1;min-width:0}.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;padding:6px;border-radius:var(--r-sm);color:var(--fg-2)}.mobile-menu-btn:hover{background:var(--surface-panel)}.nav-history-btns{display:flex;align-items:center;gap:4px}.icon-btn{background:transparent;border:1px solid transparent;border-radius:var(--r-sm);padding:6px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--fg-2);transition:all .12s ease}.icon-btn:hover:not(:disabled){background:var(--surface-panel);border-color:var(--border-soft)}.icon-btn:disabled{opacity:.35;cursor:not-allowed}.breadcrumbs{display:flex;align-items:center;gap:6px;font-size:14px;font-weight:500;overflow-x:auto;white-space:nowrap;scrollbar-width:none}.breadcrumb-item{color:var(--muted);cursor:pointer;transition:color .12s ease}.breadcrumb-item:hover{color:var(--fg);text-decoration:underline}.breadcrumb-current{color:var(--fg);font-weight:700}.search-wrapper{position:relative;width:240px}.search-input{width:100%;padding:6px 10px 6px 32px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--surface-panel);font-size:13px;transition:all .15s ease}.search-input:focus{outline:none;background:var(--surface);border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);width:280px}.search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--meta);pointer-events:none}.top-bar-right{display:flex;align-items:center;gap:10px}.btn-primary{background:var(--accent);color:var(--accent-on);border:none;padding:7px 14px;border-radius:var(--r-md);font-size:13px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px;transition:background-color .12s ease}.btn-primary:hover{background:var(--accent-hover)}.content-body{flex:1;overflow-y:auto;padding:24px;position:relative}.item-grid{display:flex;flex-direction:column;gap:8px;max-width:860px;margin:0 auto}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:12px 16px;display:flex;align-items:flex-start;gap:12px;box-shadow:var(--shadow-sm);transition:transform .1s ease,box-shadow .12s ease,border-color .12s ease;position:relative;cursor:pointer}.card:hover{box-shadow:var(--shadow-md);border-color:#d1d5db}.card.focused{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.card.drag-over-before:before{content:"";position:absolute;top:-4px;left:0;right:0;height:3px;background:var(--accent);border-radius:2px}.card.drag-over-after:after{content:"";position:absolute;bottom:-4px;left:0;right:0;height:3px;background:var(--accent);border-radius:2px}.card-handle{cursor:grab;color:var(--meta);display:flex;align-items:center;padding:4px 2px;flex-shrink:0;-webkit-user-select:none;user-select:none}.card-handle:hover{color:var(--fg-2)}.card-checkbox{margin-top:4px;cursor:pointer;width:16px;height:16px;accent-color:var(--accent)}.card-main{flex:1;min-width:0;-webkit-user-select:text;user-select:text}.card-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:4px}.card-title-wrap{display:flex;align-items:center;gap:8px;min-width:0}.card-title{font-size:15px;font-weight:600;color:var(--fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.card.done .card-title{text-decoration:line-through;color:var(--muted)}.card-edit-btn{opacity:0;padding:2px 6px;border-radius:var(--r-sm);background:transparent;border:none;cursor:pointer;color:var(--muted);transition:all .12s ease}.card:hover .card-edit-btn,.mobile-view .card-edit-btn{opacity:1}.card-edit-btn:hover{background:var(--surface-panel);color:var(--fg)}.card-badges{display:flex;align-items:center;gap:6px;flex-shrink:0}.badge{font-size:11.5px;font-weight:600;padding:2px 8px;border-radius:var(--r-pill);display:inline-flex;align-items:center;gap:4px}.badge-urgent{background:var(--danger-soft);color:var(--danger)}.badge-priority{background:var(--warn-soft);color:var(--warn)}.badge-overdue{background:var(--overdue-soft);color:var(--overdue)}.badge-due{background:var(--surface-panel);color:var(--fg-2);border:1px solid var(--border)}.badge-children{background:var(--surface-panel);color:var(--muted)}.card-latest{font-size:13.5px;color:var(--fg-2);margin-bottom:6px;line-height:1.4;white-space:pre-wrap;word-break:break-word}.card-meta{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:12px}.tag{background:var(--surface-panel);color:var(--muted);padding:1px 7px;border-radius:var(--r-sm);cursor:pointer;transition:all .12s ease;font-size:11.5px}.tag:hover{background:var(--border);color:var(--fg)}.card-images-preview{display:flex;gap:6px;margin-top:8px}.card-thumb{width:48px;height:48px;border-radius:var(--r-sm);object-fit:cover;border:1px solid var(--border);cursor:zoom-in}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--muted);text-align:center;max-width:400px;margin:0 auto}.empty-icon{font-size:40px;margin-bottom:12px;color:var(--meta)}.empty-title{font-size:16px;font-weight:600;color:var(--fg-2);margin-bottom:6px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.modal-card{background:var(--surface);border-radius:var(--r-lg);width:100%;max-width:620px;max-height:90vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);border:1px solid var(--border);overflow:hidden;animation:modalPop .18s cubic-bezier(.16,1,.3,1)}@keyframes modalPop{0%{transform:scale(.96);opacity:0}to{transform:scale(1);opacity:1}}.modal-header{padding:16px 20px;border-bottom:1px solid var(--border-soft);display:flex;align-items:center;justify-content:space-between}.modal-title{font-size:16px;font-weight:700}.modal-tabs{display:flex;border-bottom:1px solid var(--border-soft);background:var(--surface-warm);padding:0 16px}.modal-tab{padding:10px 14px;cursor:pointer;font-size:13px;font-weight:600;color:var(--muted);border-bottom:2px solid transparent}.modal-tab.active{color:var(--accent);border-bottom-color:var(--accent)}.modal-body{padding:20px;overflow-y:auto;flex:1;display:flex;flex-direction:column;gap:16px}.form-group{display:flex;flex-direction:column;gap:6px}.form-label{font-size:12.5px;font-weight:600;color:var(--fg-2)}.form-input,.form-textarea{padding:8px 12px;border:1px solid var(--border);border-radius:var(--r-md);font-size:13.5px;background:var(--surface);transition:border-color .12s ease}.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.form-textarea{resize:vertical;min-height:70px}.form-row-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.urgency-selector{display:flex;gap:6px}.urgency-btn{flex:1;padding:6px;border:1px solid var(--border);background:var(--surface);border-radius:var(--r-sm);font-size:12.5px;font-weight:500;cursor:pointer}.urgency-btn.active-0{background:var(--surface-panel);font-weight:600}.urgency-btn.active-1{background:var(--warn-soft);border-color:var(--warn);color:var(--warn);font-weight:600}.urgency-btn.active-2{background:var(--danger-soft);border-color:var(--danger);color:var(--danger);font-weight:600}.modal-footer{padding:14px 20px;border-top:1px solid var(--border-soft);display:flex;align-items:center;justify-content:space-between;background:var(--surface-warm)}.btn-secondary{background:var(--surface);border:1px solid var(--border);padding:7px 14px;border-radius:var(--r-md);font-size:13px;font-weight:500;cursor:pointer}.btn-secondary:hover{background:var(--surface-panel)}.btn-danger{background:var(--danger-soft);color:var(--danger);border:1px solid transparent;padding:7px 14px;border-radius:var(--r-md);font-size:13px;font-weight:600;cursor:pointer}.btn-danger:hover{background:#fce8e8}.records-timeline{display:flex;flex-direction:column;gap:12px}.record-item{padding:10px 12px;background:var(--surface-warm);border-radius:var(--r-md);border-left:3px solid var(--accent)}.record-header{display:flex;justify-content:space-between;font-size:11.5px;color:var(--meta);margin-bottom:4px}.record-content{font-size:13px;color:var(--fg);white-space:pre-wrap}.mobile-fab{display:none;position:fixed;right:20px;bottom:24px;width:52px;height:52px;border-radius:50%;background:var(--accent);color:#fff;border:none;box-shadow:0 6px 16px #5e6ad266;align-items:center;justify-content:center;cursor:pointer;z-index:80}.bulk-bar{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--fg);color:#fff;padding:8px 18px;border-radius:var(--r-pill);display:flex;align-items:center;gap:16px;box-shadow:var(--shadow-lg);z-index:500;animation:slideUp .2s cubic-bezier(.16,1,.3,1)}@keyframes slideUp{0%{transform:translate(-50%,20px);opacity:0}to{transform:translate(-50%);opacity:1}}.bulk-btn{background:transparent;border:1px solid rgba(255,255,255,.25);color:#fff;padding:4px 10px;border-radius:var(--r-pill);font-size:12px;cursor:pointer}.bulk-btn:hover{background:#ffffff26}.bulk-btn.danger{color:#fca5a5;border-color:#ef444466}.toast-container{position:fixed;bottom:24px;right:24px;z-index:1100;display:flex;flex-direction:column;gap:8px}.toast{background:var(--fg);color:#fff;padding:10px 16px;border-radius:var(--r-md);font-size:13px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-lg);animation:toastIn .2s ease}@keyframes toastIn{0%{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}.toast-undo-btn{background:var(--accent);color:#fff;border:none;padding:3px 8px;border-radius:4px;font-size:12px;font-weight:600;cursor:pointer}@media (max-width: 768px){.sidebar-backdrop.open{display:block}.sidebar{position:fixed;top:0;bottom:0;left:0;transform:translate(-100%);box-shadow:var(--shadow-lg)}.sidebar.open{transform:translate(0)}.mobile-menu-btn,.mobile-fab{display:flex}.search-wrapper{width:140px}.search-input:focus{width:180px}.content-body{padding:16px 12px}.card-edit-btn{opacity:1}.form-row-grid{grid-template-columns:1fr}}