:root{--bg: #f4f6f8;--surface: #ffffff;--surface-panel: #f8fafc;--surface-warm: #fcfcfd;--surface-hover: #f1f5f9;--sidebar-bg: #0a1128;--sidebar-fg: #f8fafc;--sidebar-muted: #94a3b8;--sidebar-border: rgba(255, 255, 255, .08);--sidebar-hover: rgba(255, 255, 255, .08);--sidebar-active: #2563eb;--fg: #090d16;--fg-2: #334155;--muted: #64748b;--meta: #94a3b8;--border: #e2e8f0;--border-soft: #f1f5f9;--border-dark: #cbd5e1;--accent: #1d4ed8;--accent-hover: #1e40af;--accent-active: #1e3a8a;--accent-on: #ffffff;--accent-soft: #eff6ff;--accent-ring: rgba(29, 78, 216, .2);--danger: #e11d48;--danger-soft: #fff1f2;--danger-border: #fecdd3;--warn: #d97706;--warn-soft: #fffbeb;--warn-border: #fde68a;--success: #059669;--success-soft: #ecfdf5;--overdue: #7c3aed;--overdue-soft: #f5f3ff;--font-body: "Plus Jakarta Sans", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--r-xs: 4px;--r-sm: 6px;--r-md: 8px;--r-lg: 12px;--r-pill: 9999px;--shadow-xs: 0 1px 2px rgba(15, 23, 42, .04);--shadow-sm: 0 2px 4px rgba(15, 23, 42, .04), 0 1px 2px rgba(15, 23, 42, .02);--shadow-md: 0 4px 12px rgba(15, 23, 42, .06);--shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, .1);--sidebar-w: 270px}*,*:before,*:after{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:13.5px;line-height:1.5;letter-spacing:-.012em;-webkit-user-select:none;user-select:none;overflow-x:hidden;-webkit-font-smoothing:antialiased}input,textarea,select,button{font-family:inherit;font-size:inherit;color:inherit;letter-spacing:inherit}::selection{background-color:var(--accent-soft);color:var(--accent)}.app-container{display:flex;height:100vh;width:100vw;overflow:hidden;position:relative;background-color:var(--bg)}.sidebar-backdrop{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0a112880;z-index:90;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.sidebar{width:var(--sidebar-w);height:100%;background:var(--sidebar-bg);color:var(--sidebar-fg);border-right:1px solid var(--sidebar-border);display:flex;flex-direction:column;flex-shrink:0;z-index:100}.sidebar-header{height:60px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--sidebar-border)}.sidebar-title{font-size:15px;font-weight:800;letter-spacing:-.025em;display:flex;align-items:center;gap:8px;color:#fff}.sidebar-close-btn{display:none;background:transparent;border:none;color:var(--sidebar-muted);cursor:pointer;padding:6px;border-radius:var(--r-xs)}.sidebar-close-btn:hover{background:var(--sidebar-hover);color:#fff}.sidebar-nav{padding:14px 12px 6px;display:flex;flex-direction:column;gap:3px}.sidebar-tree-container{flex:1;overflow-y:auto;padding:6px 12px}.sidebar-filters{padding:10px 12px;border-top:1px solid var(--sidebar-border);display:flex;flex-direction:column;gap:3px;background:#0003}.sidebar-footer{height:44px;padding:0 16px;border-top:1px solid var(--sidebar-border);display:flex;align-items:center;justify-content:space-between;font-size:11.5px;color:var(--sidebar-muted)}.nav-item,.tree-row{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--r-sm);cursor:pointer;color:#cbd5e1;font-size:13px;font-weight:600;outline:none;transition:all .12s ease}.nav-item:hover,.tree-row:hover{background-color:var(--sidebar-hover);color:#fff}.nav-item.active,.tree-row.active{background-color:var(--sidebar-active);color:#fff;font-weight:700}.tree-row{position:relative;font-size:12.5px;color:var(--sidebar-muted)}.tree-row.drag-over-inside{background-color:#2563eb4d;outline:2px dashed var(--accent)}.tree-row.drag-over-before:before{content:"";position:absolute;top:-2px;left:4px;right:4px;height:2px;background:#3b82f6;border-radius:1px}.tree-row.drag-over-after:after{content:"";position:absolute;bottom:-2px;left:4px;right:4px;height:2px;background:#3b82f6;border-radius:1px}.tree-expander{width:16px;height:16px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--sidebar-muted);border-radius:3px;flex-shrink:0}.tree-expander:hover{background-color:#ffffff26;color:#fff}.tree-label{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badge-count{font-family:var(--font-mono);font-size:11px;padding:1px 6px;border-radius:var(--r-pill);background:#ffffff1f;color:#e2e8f0;font-weight:600}.filter-item{display:flex;align-items:center;justify-content:space-between;padding:6px 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