:root{--bg: #fafafa;--bg-secondary: #f0f0f0;--text: #1a1a1a;--text-muted: #888;--text-dim: #bbb;--border: #e0e0e0;--accent: #2563eb;--accent-light: #dbeafe;--danger: #dc2626;--success: #16a34a;--node-indent: 24px;--bullet-size: 7px;--focus-bg: #f0f7ff;--focus-border: #2563eb;--drop-color: #2563eb;--completed-opacity: .45;--bullet-ring: #e5e5e5;--bullet-ring-collapsed: #ccc;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace}@media(prefers-color-scheme:dark){:root:not(.light){--bg: #1a1a1a;--bg-secondary: #252525;--text: #e5e5e5;--text-muted: #888;--text-dim: #555;--border: #333;--accent: #60a5fa;--accent-light: #1e3a5f;--focus-bg: #1e2a3a;--focus-border: #60a5fa;--drop-color: #60a5fa;--bullet-ring: #4a4a4a;--bullet-ring-collapsed: #5a5a5a}}:root.dark{--bg: #1a1a1a;--bg-secondary: #252525;--text: #e5e5e5;--text-muted: #888;--text-dim: #555;--border: #333;--accent: #60a5fa;--accent-light: #1e3a5f;--focus-bg: #1e2a3a;--focus-border: #60a5fa;--drop-color: #60a5fa;--bullet-ring: #3a3a3a;--bullet-ring-collapsed: #4a4a4a}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:var(--font-sans);font-size:15px;line-height:1.5;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}#app{max-width:800px;margin:0 auto;padding:12px 16px;min-height:100%}#toolbar{display:flex;align-items:center;gap:12px;padding-bottom:8px;border-bottom:1px solid var(--border);flex-wrap:wrap}.toolbar-left{flex:1;min-width:150px;position:relative}.toolbar-right{display:flex;align-items:center;gap:10px;flex-shrink:0}#search-input{width:100%;padding:6px 10px;border:1px solid var(--border);border-radius:6px;font-size:14px;background:var(--bg);color:var(--text);outline:none;transition:border-color .15s}#search-input:focus{border-color:var(--accent)}.toggle-completed{font-size:13px;color:var(--text-muted);cursor:pointer;white-space:nowrap;-webkit-user-select:none;user-select:none;display:flex;align-items:center;gap:4px}button{padding:5px 12px;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text);font-size:13px;cursor:pointer;white-space:nowrap}button:hover{background:var(--bg-secondary)}button.btn-danger{color:var(--danger);border-color:var(--danger)}#breadcrumbs{padding:8px 0;font-size:13px;color:var(--text-muted);min-height:30px}#breadcrumbs a{color:var(--accent);text-decoration:none;cursor:pointer}#breadcrumbs a:hover{text-decoration:underline}#breadcrumbs .separator{margin:0 4px;color:var(--text-dim)}#search-results{position:absolute;left:16px;right:16px;max-width:768px;margin:0 auto;background:var(--bg);border:1px solid var(--border);border-radius:8px;box-shadow:0 4px 16px #0000001f;z-index:200;max-height:360px;overflow-y:auto;padding:4px}#search-results.hidden{display:none}.action-bar-item{padding:8px 12px;border-radius:6px;cursor:pointer;margin-bottom:1px;display:flex;align-items:center;gap:12px}.action-bar-item:hover,.action-bar-item.active{background:var(--bg-secondary)}.action-bar-cmd-name{font-family:var(--font-mono);font-size:13px;color:var(--accent);flex-shrink:0}.action-bar-cmd-desc{font-size:13px;color:var(--text-muted)}.action-bar-result-text{font-size:14px}.action-bar-result-breadcrumb{font-size:12px;color:var(--text-muted);margin-top:2px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:24px 28px;max-width:480px;width:90%;box-shadow:0 8px 32px #0003}.modal h2{font-size:16px;font-weight:600;margin-bottom:16px}.shortcuts-table{width:100%;border-collapse:collapse}.shortcuts-table tr{border-bottom:1px solid var(--border)}.shortcuts-table tr:last-child{border-bottom:none}.shortcuts-table td{padding:7px 0;vertical-align:middle}.shortcut-key{width:45%}.shortcut-key kbd{display:inline-block;padding:2px 7px;font-family:var(--font-mono);font-size:12px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:4px;color:var(--text)}.shortcut-desc{font-size:13px;color:var(--text-muted)}.modal-close{margin-top:16px;width:100%;padding:8px;border-radius:8px;font-size:14px}#tree-container{padding:8px 0}.node{position:relative}.node.completed{opacity:var(--completed-opacity)}.node.completed .node-text{text-decoration:line-through}.node.hidden-completed{display:none}.node-self{display:flex;align-items:flex-start;gap:2px;padding:1px 0;border-radius:4px;position:relative}.node-self.focused{background:var(--focus-bg)}.node-dots{display:flex;align-items:center;justify-content:center;width:18px;height:24px;cursor:pointer;color:var(--text-dim);font-size:18px;flex-shrink:0;opacity:0;transition:opacity .15s;-webkit-user-select:none;user-select:none;letter-spacing:-1px}.node-self:hover .node-dots{opacity:1}.node-collapse{display:flex;align-items:center;justify-content:center;width:14px;height:24px;flex-shrink:0;cursor:default;opacity:0;transition:opacity .15s;-webkit-user-select:none;user-select:none}.node-collapse.visible{cursor:pointer}.node-self:hover .node-collapse.visible{opacity:1}.node-collapse.visible:after{content:"";display:block;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid var(--text-muted);transition:transform .15s}.node-collapse.visible.is-collapsed:after{transform:rotate(-90deg)}.node-drag-handle{display:none;align-items:center;justify-content:center;width:0;height:0;cursor:grab;color:var(--text-dim);font-size:10px;flex-shrink:0;opacity:0;-webkit-user-select:none;user-select:none;touch-action:none}.node-bullet{display:flex;align-items:center;justify-content:center;width:20px;height:24px;cursor:pointer;flex-shrink:0;-webkit-user-select:none;user-select:none}.node-bullet:after{content:"";width:var(--bullet-size);height:var(--bullet-size);border-radius:50%;background:var(--text);display:block}.node.has-children .node-bullet:after{box-shadow:0 0 0 4px var(--bullet-ring)}.node-text{flex:1;min-height:24px;line-height:24px;outline:none;word-break:break-word;font-family:var(--font-sans);font-size:15px;padding:0 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#00000026;font-size:14px;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.drop-indicator{position:absolute;height:2px;background:var(--drop-color);pointer-events:none;z-index:100;border-radius:1px}.drop-indicator:before{content:"";position:absolute;left:-3px;top:-3px;width:8px;height:8px;border-radius:50%;background:var(--drop-color)}.context-menu{position:fixed;background:var(--bg);border:1px solid var(--border);border-radius:8px;box-shadow:0 4px 16px #00000026;z-index:500;min-width:150px;padding:4px}.context-menu-item{padding:7px 12px;font-size:13px;border-radius:5px;cursor:pointer;color:var(--text)}.context-menu-item:hover{background:var(--bg-secondary)}.context-menu-item.danger{color:var(--danger)}#save-indicator{position:fixed;bottom:16px;right:16px;padding:4px 12px;border-radius:6px;font-size:12px;background:var(--success);color:#fff;transition:opacity .3s;z-index:500}#save-indicator.hidden{opacity:0;pointer-events:none}#save-indicator.error{background:var(--danger)}@media(max-width:600px){#app{padding:8px 10px}.node-drag-handle{opacity:.5}:root{--node-indent: 18px}}.auth-container{display:flex;align-items:center;justify-content:center;min-height:80vh}.auth-card{width:100%;max-width:360px;padding:32px}.auth-card h1{font-size:24px;font-weight:600;margin-bottom:4px;text-align:center}.auth-subtitle{font-size:14px;color:var(--text-muted);text-align:center;margin-bottom:24px}.auth-error{font-size:13px;color:var(--danger);margin-bottom:12px;text-align:center}.auth-error.hidden{display:none}.auth-input{display:block;width:100%;padding:10px 12px;margin-bottom:12px;border:1px solid var(--border);border-radius:8px;font-size:15px;background:var(--bg);color:var(--text);outline:none;font-family:var(--font-sans)}.auth-input:focus{border-color:var(--accent)}.auth-btn{display:block;width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;font-size:15px;cursor:pointer;font-family:var(--font-sans)}.auth-btn:disabled{opacity:.5;cursor:default}.auth-btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.auth-btn-primary:hover:not(:disabled){opacity:.9}.auth-btn-secondary{background:var(--bg);color:var(--text)}.auth-btn-secondary:hover{background:var(--bg-secondary)}.auth-divider{text-align:center;font-size:13px;color:var(--text-dim);margin:16px 0}