:root{--bg-canvas:#fafafa;--bg-toolbar:hsla(0,0%,100%,.92);--bg-panel:#fff;--bg-dialog:#fff;--bg-input:#fff;--text-primary:#222;--text-secondary:#666;--text-muted:#888;--border-color:#e0e0e0;--border-light:#eee;--accent:#31a1df;--accent-hover:#2789c0;--danger:#e74c3c;--danger-hover-bg:#fde8e8;--shadow-selected:0 0 0 3px var(--accent);--canvas-dots:#e0e0e0;--overlay-bg:rgba(0,0,0,.3);--scrollbar-thumb:silver;--scrollbar-track:transparent}[data-theme=dark]{--bg-canvas:#1e1e1e;--bg-toolbar:rgba(45,45,45,.92);--bg-panel:#2a2a2a;--bg-dialog:#2a2a2a;--bg-input:#333;--text-primary:#e0e0e0;--text-secondary:#a0a0a0;--text-muted:#888;--border-color:#444;--border-light:#3a3a3a;--accent:#4db8e8;--accent-hover:#3a9fd4;--danger:#f07070;--danger-hover-bg:#3a2020;--shadow-selected:0 0 0 3px var(--accent);--canvas-dots:#3a3a3a;--overlay-bg:rgba(0,0,0,.6);--scrollbar-thumb:#555;--scrollbar-track:transparent}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;background:var(--bg-canvas);color:var(--text-primary);transition:background .2s,color .2s;overscroll-behavior:none;touch-action:manipulation}@media (display-mode:standalone){html{padding-top:env(safe-area-inset-top,0);padding-bottom:env(safe-area-inset-bottom,0)}}.home-view{max-width:640px;margin:60px auto;padding:0 20px}.home-view h1{font-size:28px;margin-bottom:8px}.home-view .subtitle{color:var(--text-secondary);margin-bottom:28px}.home-view .actions{display:flex;gap:12px;margin-bottom:32px;flex-wrap:wrap}.home-view .actions button{padding:10px 20px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-panel);cursor:pointer;font-size:14px;color:var(--text-primary);transition:background .15s}.home-view .actions button:hover{background:var(--border-light)}.home-view .actions button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}.home-view .actions button.primary:hover{background:var(--accent-hover)}.home-view .doc-list{list-style:none}.home-view .doc-list li{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border:1px solid var(--border-color);border-radius:6px;margin-bottom:8px;cursor:pointer;transition:background .15s}.home-view .doc-list li:hover{background:var(--border-light)}.home-view .doc-list .doc-title{font-weight:600}.home-view .doc-list .doc-meta{font-size:12px;color:var(--text-muted)}.home-view .empty-state{color:var(--text-muted);font-style:italic;text-align:center;padding:40px 0}.map-container{position:fixed;inset:0;overflow:hidden;cursor:-webkit-grab;cursor:grab;background:var(--bg-canvas);background-image:radial-gradient(circle,var(--canvas-dots) 1px,transparent 1px);background-size:24px 24px;touch-action:none}.map-container.panning,.map-container:active{cursor:-webkit-grabbing;cursor:grabbing}.map-inner{position:absolute;transform-origin:0 0}.branch-svg{position:absolute;top:0;left:0;pointer-events:none;overflow:visible}.mindmap-node{position:absolute;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none;touch-action:none}.mindmap-node .node-caption{white-space:nowrap;padding:6px 10px;border-radius:6px;text-align:center;transition:box-shadow .1s}.mindmap-node.root-node .node-caption{background:#31a1df;color:#fff;font-weight:700;font-size:18px;border-radius:10px;padding:8px 16px}.mindmap-node .node-caption.selected{box-shadow:var(--shadow-selected)}.mindmap-node .node-caption:hover{box-shadow:0 0 0 2px rgba(49,161,223,.5)}.mindmap-node.root-node .node-caption:hover{box-shadow:0 0 0 2px rgba(231,76,60,.5)}.map-back-btn{position:fixed;top:12px;left:12px;z-index:1000;padding:8px 16px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-panel);color:var(--text-primary);cursor:pointer;font-size:13px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.map-back-btn:hover{background:var(--border-light)}.map-toolbar{position:fixed;top:0;left:0;right:0;z-index:1000;display:flex;align-items:center;gap:6px;padding:calc(8px + env(safe-area-inset-top, 0px)) calc(12px + env(safe-area-inset-right, 0px)) 8px calc(12px + env(safe-area-inset-left, 0px));background:var(--bg-toolbar);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--border-color);flex-wrap:wrap}.map-toolbar .toolbar-group{display:flex;gap:4px}.toolbar-btn{padding:6px 12px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-panel);cursor:pointer;font-size:13px;white-space:nowrap;transition:background .15s,border-color .15s;color:var(--text-primary);min-height:36px;min-width:36px;touch-action:manipulation}.toolbar-btn:hover:not(:disabled){background:var(--border-light)}.toolbar-btn:disabled{opacity:.4;cursor:default}.toolbar-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.toolbar-btn.active:hover:not(:disabled){background:var(--accent-hover)}.toolbar-btn-danger:hover:not(:disabled){background:var(--danger-hover-bg);border-color:var(--danger);color:var(--danger)}.toolbar-btn-icon{padding:6px 8px;font-size:16px;line-height:1}.theme-toggle-group .theme-toggle-btn,.toolbar-btn-icon{display:inline-flex;align-items:center;justify-content:center}.toolbar-divider{width:1px;height:24px;background:var(--border-color);margin:0 4px;align-self:center}.theme-toggle-group{display:flex;gap:0;border:1px solid var(--border-color);border-radius:6px;overflow:hidden}.theme-toggle-group .theme-toggle-btn{padding:6px 10px;border:none;background:transparent;cursor:pointer;font-size:14px;color:var(--text-secondary);transition:background .15s,color .15s;min-height:36px;min-width:36px;touch-action:manipulation}.theme-toggle-group .theme-toggle-btn:hover{background:var(--border-light)}.theme-toggle-group .theme-toggle-btn.active{background:var(--accent);color:#fff}.map-toolbar .map-back-btn{position:static;top:auto;left:auto;z-index:auto;margin-right:8px}.inspector-panel{position:fixed;top:60px;right:12px;z-index:1000;width:280px;background:var(--bg-panel);border:1px solid var(--border-color);border-radius:8px;padding:16px;box-shadow:0 4px 16px rgba(0,0,0,.12);font-size:13px;color:var(--text-primary);transition:background .2s}.inspector-panel.collapsed{width:auto;padding:8px}.inspector-panel .inspector-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-weight:600}.inspector-panel .inspector-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;gap:8px}.inspector-panel .inspector-row label{font-size:12px;color:var(--text-secondary);white-space:nowrap}.inspector-panel input[type=color]{width:32px;height:28px;background:var(--bg-input);padding:2px}.inspector-panel .inspector-btn,.inspector-panel input[type=color]{border:1px solid var(--border-color);border-radius:4px;cursor:pointer}.inspector-panel .inspector-btn{padding:4px 10px;background:var(--bg-panel);font-size:12px;color:var(--text-primary);transition:background .15s;min-height:30px;min-width:30px;touch-action:manipulation}.inspector-panel .inspector-btn:hover{background:var(--border-light)}.inspector-panel .inspector-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.inspector-panel .font-style-group{display:flex;gap:2px}.inspector-panel .font-style-group .inspector-btn{font-weight:700;font-size:13px;padding:4px 8px;min-width:32px;text-align:center}.inspector-panel .font-style-group .inspector-btn.italic-btn{font-style:italic}.inspector-panel .font-style-group .inspector-btn.underline-btn{text-decoration:underline}.inspector-panel .font-style-group .inspector-btn.strikethrough-btn{text-decoration:line-through}.inspector-toggle-btn{position:fixed;top:60px;right:12px;z-index:1001;padding:6px 10px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-panel);cursor:pointer;font-size:14px;color:var(--text-primary)}.dialog-overlay{position:fixed;inset:0;z-index:2000;background:var(--overlay-bg);display:flex;align-items:center;justify-content:center}.dialog-box{background:var(--bg-dialog);border-radius:8px;padding:24px;min-width:300px;max-width:90vw;max-height:80vh;overflow-y:auto;box-shadow:0 8px 32px rgba(0,0,0,.2);color:var(--text-primary)}.dialog-box h2{font-size:18px;margin-bottom:16px}.dialog-box h3{font-size:14px;margin-bottom:8px;color:var(--text-secondary)}.dialog-box .dialog-section{margin-bottom:20px}.dialog-box .doc-list-mini{list-style:none;max-height:200px;overflow-y:auto}.dialog-box .doc-list-mini li{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;margin-bottom:4px;cursor:pointer;transition:background .15s}.dialog-box .doc-list-mini li:hover{background:var(--border-light)}.dialog-box .dialog-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}.dialog-box button{padding:8px 16px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-panel);cursor:pointer;font-size:13px;color:var(--text-primary)}.dialog-box button:hover{background:var(--border-light)}.dialog-box button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}.dialog-box button.primary:hover{background:var(--accent-hover)}.dialog-box button.danger{color:var(--danger);border-color:var(--danger)}.dialog-box button.danger:hover{background:var(--danger-hover-bg)}.dialog-box .shortcuts-table{width:100%;border-collapse:collapse;font-size:13px}.dialog-box .shortcuts-table td{padding:6px 8px;border-bottom:1px solid var(--border-light)}.dialog-box .shortcuts-table td:first-child{font-weight:600;white-space:nowrap;color:var(--text-secondary);width:180px}.export-preview{text-align:center;padding:16px 0}.export-preview img{max-width:100%;max-height:50vh;border:1px solid var(--border-color);border-radius:4px}.export-preview p{color:var(--text-secondary);font-size:13px;margin-bottom:12px}.creator-nub{position:absolute;top:50%;transform:translateY(-50%);width:28px;height:28px;border-radius:50%;border:2px solid var(--accent);background:var(--bg-panel);color:var(--accent);font-size:18px;font-weight:700;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;z-index:10;transition:background .15s,color .15s,opacity .15s,transform .15s}.creator-nub:hover{background:var(--accent);color:#fff;transform:translateY(-50%) scale(1.15)}.creator-nub:active{transform:translateY(-50%) scale(.95)}.creator-nub.right{right:-36px}.creator-nub.left{left:-36px}@media (hover:hover) and (pointer:fine){.mindmap-node .creator-nub{opacity:0;pointer-events:none}.mindmap-node .creator-nub.always-visible,.mindmap-node:hover .creator-nub{opacity:1;pointer-events:auto}}@media (hover:none) or (pointer:coarse){.creator-nub{width:44px;height:44px;font-size:24px;opacity:0;pointer-events:none}.mindmap-node.selected .creator-nub{opacity:1;pointer-events:auto}.creator-nub.right{right:-50px}.creator-nub.left{left:-50px}}.breadcrumb-bar{position:fixed;top:var(--toolbar-h,56px);left:0;right:0;z-index:999;display:flex;align-items:center;gap:4px;padding:6px 12px;background:var(--bg-toolbar);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--border-color);flex-wrap:wrap;font-size:13px}.breadcrumb-bar .breadcrumb-sep{color:var(--text-muted);font-size:12px;-webkit-user-select:none;-moz-user-select:none;user-select:none}.breadcrumb-bar .breadcrumb-crumb{padding:3px 8px;border:1px solid transparent;border-radius:4px;background:transparent;cursor:pointer;color:var(--text-secondary);font-size:13px;white-space:nowrap;max-width:180px;overflow:hidden;text-overflow:ellipsis;transition:background .15s,color .15s;min-height:30px;display:flex;align-items:center}.breadcrumb-bar .breadcrumb-crumb:hover{background:var(--border-light);color:var(--text-primary)}.breadcrumb-bar .breadcrumb-crumb.current{color:var(--text-primary);font-weight:600;cursor:default}.breadcrumb-bar .breadcrumb-crumb.current:hover{background:transparent}.breadcrumb-bar .breadcrumb-exit-btn{margin-left:auto;padding:3px 10px;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-panel);cursor:pointer;font-size:12px;color:var(--text-secondary);white-space:nowrap;transition:background .15s;min-height:28px}.breadcrumb-bar .breadcrumb-exit-btn:hover{background:var(--border-light);color:var(--text-primary)}@media (max-width:600px){.breadcrumb-bar{padding:4px 6px;gap:2px}.breadcrumb-bar .breadcrumb-crumb{font-size:11px;padding:2px 6px;max-width:120px;min-height:28px}}.node-editor{border:none;outline:none;background:transparent;font:inherit;color:inherit;font-weight:inherit;font-style:inherit;text-decoration:inherit;width:100%;min-width:80px;resize:none;overflow:hidden;text-align:center;padding:0;margin:0;line-height:inherit}.node-caption.editing{background:var(--bg-input);box-shadow:0 0 0 2px var(--accent);min-width:80px}.mindmap-node.caption-editor-overlay{cursor:text}.node-editor-box{white-space:nowrap;padding:6px 10px;border-radius:6px;text-align:center;display:flex;color:var(--text-primary);background:var(--bg-input);box-shadow:0 0 0 2px var(--accent);min-width:80px}.mindmap-node.caption-editor-overlay.root-node .node-editor-box{color:#fff;background:#1a8bc0;box-shadow:0 0 0 2px #fff;font-weight:700}.node-editor{caret-color:var(--text-primary)}.mindmap-node.root-node .node-caption.editing{background:#1a8bc0;box-shadow:0 0 0 2px #fff}.mindmap-node.drop-target .node-caption{box-shadow:0 0 0 2px #27ae60;border-radius:4px}.mindmap-node.drop-target.drop-invalid .node-caption{box-shadow:0 0 0 2px #e74c3c}.mindmap-node:not(.root-node) .node-caption{cursor:-webkit-grab;cursor:grab}.mindmap-node:not(.root-node) .node-caption:active{cursor:-webkit-grabbing;cursor:grabbing}.mindmap-node.root-node .node-caption{cursor:pointer}@media (max-width:600px){.map-toolbar{padding:6px 8px;gap:6px;flex-wrap:nowrap;overflow:hidden}.map-toolbar .toolbar-group{gap:2px}.toolbar-btn{padding:6px 10px;font-size:13px;min-height:40px;min-width:40px}.toolbar-divider{height:20px;margin:0 2px}.map-toolbar .map-back-btn{padding:6px 10px;font-size:13px;margin-right:2px;min-height:40px}.inspector-panel{top:50px;right:4px;width:260px;padding:12px;font-size:12px}.inspector-panel .inspector-row{margin-bottom:6px}.dialog-box{min-width:280px;padding:16px}.dialog-box .shortcuts-table td:first-child{width:120px;font-size:11px}}.inspector-sheet-backdrop{position:fixed;inset:0;z-index:1500;background:var(--overlay-bg);animation:sheet-backdrop-in .2s ease-out}@keyframes sheet-backdrop-in{0%{opacity:0}to{opacity:1}}.inspector-sheet{position:fixed;bottom:0;left:0;right:0;z-index:1501;max-height:60vh;background:var(--bg-panel);border-radius:16px 16px 0 0;box-shadow:0 -4px 24px rgba(0,0,0,.18);display:flex;flex-direction:column;animation:sheet-slide-up .25s ease-out;padding-bottom:env(safe-area-inset-bottom,0)}@keyframes sheet-slide-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}.inspector-sheet-handle-area{display:flex;justify-content:center;padding:8px 0 4px;touch-action:none;cursor:-webkit-grab;cursor:grab}.inspector-sheet-handle{width:36px;height:4px;border-radius:2px;background:var(--border-color)}.inspector-caption-input{flex:1 1;min-width:0;margin-left:12px;padding:8px 10px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-panel);color:var(--text-primary);font-size:16px}.inspector-sheet-header{display:flex;justify-content:space-between;align-items:center;padding:4px 16px 12px;font-weight:600;font-size:14px;border-bottom:1px solid var(--border-light)}.inspector-sheet-body{padding:12px 16px;overflow-y:auto;flex:1 1}.quick-format-bar{position:fixed;left:0;right:0;z-index:3000;display:flex;align-items:center;justify-content:space-between;background:var(--bg-panel);border-top:1px solid var(--border-color);box-shadow:0 -2px 8px rgba(0,0,0,.08);bottom:0;padding:8px 12px calc(8px + env(safe-area-inset-bottom, 0px))}.quick-format-actions{display:flex;align-items:center;gap:6px}.quick-format-btn{width:36px;height:36px;border:1px solid var(--border-color);border-radius:8px;background:var(--bg-input);cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;color:var(--text-primary);transition:background .15s;touch-action:manipulation}.quick-format-btn:active{background:var(--border-light)}.quick-format-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.quick-format-color{position:relative;width:36px;height:36px;border:1px solid var(--border-color);border-radius:8px;background:var(--bg-input);overflow:hidden;cursor:pointer}.quick-format-color input[type=color]{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.quick-format-color-label{display:flex;align-items:center;justify-content:center;width:100%;height:100%;font-size:14px;font-weight:600;color:var(--text-primary);pointer-events:none}.quick-format-done-btn{padding:8px 18px;border:none;border-radius:8px;background:var(--accent);color:#fff;font-size:14px;font-weight:600;cursor:pointer;touch-action:manipulation;transition:background .15s}.quick-format-done-btn:active{background:var(--accent-hover)}.context-menu{min-width:220px;display:flex;flex-direction:column;padding:6px;background:var(--bg-panel);border:1px solid var(--border-color);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.18)}.context-menu-item{display:flex;justify-content:space-between;align-items:center;gap:16px;width:100%;min-height:44px;padding:8px 12px;border:none;border-radius:6px;background:transparent;color:var(--text-primary);font-size:14px;text-align:left;cursor:pointer;transition:background .1s;touch-action:manipulation}.context-menu-item:active:not(:disabled),.context-menu-item:hover:not(:disabled){background:var(--border-light)}.context-menu-item:disabled{opacity:.4;cursor:default}.context-menu-label{flex:1 1;white-space:nowrap}.context-menu-shortcut{font-size:12px;color:var(--text-muted);white-space:nowrap}.collapse-chip{position:absolute;top:50%;transform:translateY(-50%);width:24px;height:24px;border-radius:50%;border:1.5px solid var(--border-color);background:var(--bg-panel);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;font-size:13px;line-height:1;padding:0;cursor:pointer;z-index:10;transition:background .15s,color .15s;touch-action:manipulation}.collapse-chip:hover{background:var(--border-light);color:var(--text-primary)}.collapse-chip.left{left:-30px}.collapse-chip.right{right:-30px}.collapse-chip.collapsed{border-color:var(--accent);color:var(--accent)}.collapse-chip .collapse-badge{position:absolute;top:-8px;right:-8px;min-width:16px;height:16px;padding:0 4px;border-radius:8px;background:var(--accent);color:#fff;font-size:10px;font-weight:600;display:flex;align-items:center;justify-content:center}@media (hover:none) or (pointer:coarse){.collapse-chip{width:32px;height:32px;font-size:16px}.collapse-chip.left{left:-38px}.collapse-chip.right{right:-38px}}.save-toast{position:fixed;top:calc(var(--toolbar-h, 56px) + 12px);left:50%;transform:translateX(-50%);z-index:3000;padding:8px 16px;border-radius:8px;background:var(--bg-panel);border:1px solid var(--border-color);color:var(--text-primary);font-size:13px;box-shadow:0 4px 16px rgba(0,0,0,.15);animation:save-toast-in .15s ease-out;pointer-events:none}@keyframes save-toast-in{0%{opacity:0;transform:translateX(-50%) translateY(-6px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}.map-toolbar-compact{flex-wrap:nowrap;overflow:hidden}.toolbar-sheet-overlay{align-items:flex-end;justify-content:stretch}.toolbar-sheet{width:100%;background:var(--bg-panel);border-radius:16px 16px 0 0;box-shadow:0 -4px 24px rgba(0,0,0,.18);padding:4px 12px calc(12px + env(safe-area-inset-bottom, 0px));display:flex;flex-direction:column;animation:sheet-slide-up .25s ease-out;max-height:75vh;overflow-y:auto}.toolbar-sheet-handle{width:36px;height:4px;border-radius:2px;background:var(--border-color);margin:6px auto 10px}.toolbar-sheet-item{display:flex;align-items:center;width:100%;min-height:48px;padding:10px 12px;border:none;border-radius:8px;background:transparent;color:var(--text-primary);font-size:15px;text-align:left;cursor:pointer;touch-action:manipulation}.toolbar-sheet-item:active{background:var(--border-light)}.toolbar-sheet-item.danger{color:var(--danger)}.toolbar-sheet-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:48px;padding:6px 12px}.toolbar-sheet-label{font-size:14px;color:var(--text-secondary)}.toolbar-sheet-segment{display:flex;gap:4px}.toolbar-btn-with-icon{display:inline-flex;align-items:center;gap:6px}.theme-toggle-btn svg,.toolbar-btn-icon svg{margin:0 auto}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}