:root{font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;--bg-primary: #0b0d0f;--bg-secondary: #12161a;--bg-tertiary: #191f24;--border-color: #232a31;--accent-color: #8b5cf6;--accent-hover: #7c3aed;--accent-glow: rgba(139, 92, 246, .15);--text-main: #f3f4f6;--text-muted: #9ca3af;--text-dark: #6b7280;--transition-smooth: all .2s cubic-bezier(.4, 0, .2, 1);--modal-bg: rgba(18, 22, 26, .85);--modal-border: rgba(255, 255, 255, .08);--modal-title-color: #ffffff;--popover-bg: rgba(30, 30, 37, .95);--popover-border: rgba(255, 255, 255, .08);--empty-bg: radial-gradient(circle at 50% 50%, #111823 0%, var(--bg-primary) 70%);--empty-title-color: #ffffff;--title-gradient: linear-gradient(135deg, #fff 0%, #a78bfa 100%);--tab-bg-inactive: #0b0d10}.app-container.theme-light{color-scheme:light;--bg-primary: #ffffff;--bg-secondary: #f4f5f7;--bg-tertiary: #e2e8f0;--border-color: #e2e8f0;--accent-color: #7c3aed;--accent-hover: #6d28d9;--accent-glow: rgba(124, 58, 237, .1);--text-main: #1e293b;--text-muted: #64748b;--text-dark: #94a3b8;--modal-bg: rgba(255, 255, 255, .95);--modal-border: rgba(0, 0, 0, .1);--modal-title-color: #0f172a;--popover-bg: rgba(255, 255, 255, .98);--popover-border: rgba(0, 0, 0, .1);--empty-bg: radial-gradient(circle at 50% 50%, #f1f5f9 0%, #ffffff 70%);--empty-title-color: #0f172a;--title-gradient: linear-gradient(135deg, #1e293b 0%, #7c3aed 100%);--tab-bg-inactive: #e2e8f0}*{box-sizing:border-box;margin:0;padding:0}body,html,#root{width:100vw;height:100vh;overflow:hidden;background-color:var(--bg-primary);color:var(--text-main)}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:#0b0d0f;color:#f8f9fa}.login-panel{width:min(420px,100%);background:#11161c;border:1px solid #252c36;border-radius:10px;padding:28px;box-shadow:0 24px 80px #0000005c}.login-brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.login-brand-mark{width:38px;height:38px;display:grid;place-items:center;color:#c4a7ff;background:#7c5dfa29;border:1px solid rgba(196,167,255,.28);border-radius:8px}.login-brand h1{margin:0;font-size:1.55rem;line-height:1;letter-spacing:0}.login-brand p{margin:6px 0 0;color:#9aa4b2;font-size:.82rem}.login-form{display:flex;flex-direction:column;gap:14px}.login-form label{display:flex;flex-direction:column;gap:7px;color:#d7dce5;font-size:.78rem;font-weight:700}.login-form input{height:38px;padding:0 12px;background:#0b0d0f;color:#f8f9fa;border:1px solid #28313d;border-radius:7px;outline:none;font:inherit}.login-form input:focus{border-color:#a78bfa;box-shadow:0 0 0 3px #a78bfa29}.login-submit-btn{height:40px;margin-top:4px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:7px;background:#8b5cf6;color:#fff;font-size:.82rem;font-weight:800;cursor:pointer}.login-submit-btn:hover{background:#9f7aea}.login-submit-btn:disabled{cursor:wait;opacity:.72}.login-error{padding:9px 10px;color:#fecaca;background:#f871711f;border:1px solid rgba(248,113,113,.24);border-radius:7px;font-size:.75rem}.login-note{margin-top:18px;display:flex;align-items:center;gap:8px;color:#9aa4b2;font-size:.75rem;line-height:1.35}.app-container{display:flex;width:100%;height:100%;position:relative}.sidebar{width:280px;height:100%;background-color:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0;transition:width .3s cubic-bezier(.4,0,.2,1),transform .3s cubic-bezier(.4,0,.2,1),margin-left .3s cubic-bezier(.4,0,.2,1);z-index:10}.sidebar-header{padding:16px;border-bottom:1px solid var(--border-color);display:flex;flex-direction:column;gap:12px}.sidebar-title-row{display:flex;align-items:center;justify-content:space-between}.sidebar-title{font-family:Outfit,sans-serif;font-size:1.25rem;font-weight:700;color:var(--text-main);letter-spacing:-.5px;background:var(--title-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:flex;align-items:center;gap:8px}.sidebar-title svg{width:15px!important;height:15px!important}.vault-badge{background-color:var(--border-color);color:var(--text-muted);font-size:.7rem;font-weight:600;padding:2px 6px;border-radius:4px;border:1px solid rgba(255,255,255,.05)}.search-container{position:relative;width:100%}.search-input{width:100%;background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:6px;padding:8px 12px 8px 34px;color:var(--text-main);font-size:.75rem;outline:none;transition:var(--transition-smooth)}.search-input:focus{border-color:var(--accent-color);box-shadow:0 0 0 3px var(--accent-glow)}.search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-dark);pointer-events:none}.action-buttons-row{display:flex;gap:6px}.sidebar-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;background-color:var(--bg-primary);border:1px solid var(--border-color);color:var(--text-main);font-size:.75rem;font-weight:500;padding:6px 10px;border-radius:6px;cursor:pointer;transition:var(--transition-smooth)}.sidebar-btn:hover{background-color:var(--bg-tertiary);border-color:var(--text-dark)}.sidebar-btn.primary{background-color:var(--accent-color);border-color:var(--accent-color);color:#fff}.sidebar-btn.primary:hover{background-color:var(--accent-hover)}.tree-scroll-container{flex:1;overflow-y:auto;padding:12px 8px}.tree-scroll-container::-webkit-scrollbar{width:6px}.tree-scroll-container::-webkit-scrollbar-track{background:transparent}.tree-scroll-container::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.tree-scroll-container::-webkit-scrollbar-thumb:hover{background:var(--text-dark)}.tree-node{margin-bottom:2px;border-radius:4px}.tree-node.folder-expanded>.node-children{position:relative}.tree-node.folder-expanded>.node-children:before{content:"";position:absolute;top:0;bottom:8px;left:calc((var(--tree-depth, 0) * 22px) + 23px);width:1px;background:var(--text-dark);opacity:.52;pointer-events:none}.theme-light .tree-node.folder-expanded>.node-children:before{opacity:.38}.node-row{display:flex;align-items:center;padding:5px 6px;cursor:pointer;border-radius:4px;position:relative;-webkit-user-select:none;user-select:none}.node-row:hover{background-color:var(--bg-tertiary)}.node-row.active{background-color:var(--node-active-bg, var(--accent-glow));color:var(--node-accent-color, var(--accent-color))}.node-row.active .node-icon{color:var(--node-accent-color, var(--accent-color))}.node-row.drag-before:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background-color:var(--node-accent-color, var(--accent-color));z-index:5;pointer-events:none}.node-row.drag-after:after{content:"";position:absolute;bottom:0;left:0;right:0;height:2px;background-color:var(--node-accent-color, var(--accent-color));z-index:5;pointer-events:none}.node-row.drag-inside{background-color:var(--node-active-bg, var(--accent-glow))!important;outline:1px dashed var(--node-accent-color, var(--accent-color))!important;outline-offset:-1px}.indent-guide{width:12px;height:100%;border-left:1px dashed var(--border-color);margin-left:6px;display:inline-block;transition:var(--transition-smooth)}.tree-no-icons .indent-guide{align-self:stretch;height:auto;border-left:1.5px solid var(--border-color);border-left-style:solid;margin-left:8px;margin-right:2px;opacity:.5}.tree-no-icons .node-row{min-height:24px}.arrow-icon{width:14px;height:14px;color:var(--text-dark);display:flex;align-items:center;justify-content:center;margin-right:2px}.arrow-icon.expanded{transform:rotate(90deg)}.node-icon{color:var(--text-muted);margin-right:5px;display:flex;align-items:center}.arrow-icon svg,.node-icon svg{width:13px!important;height:13px!important}.node-icon.folder{color:#60a5fa}.node-icon.file{color:#a78bfa}.node-label{font-size:.75rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.node-input-rename{background-color:var(--bg-primary);border:1px solid var(--accent-color);color:var(--text-main);font-size:.75rem;padding:2px 4px;border-radius:3px;width:100%;outline:none}.node-actions{display:none;gap:4px;margin-left:auto;padding-left:6px}.node-row:hover 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.excalidraw-plus-icon{color:var(--text-main)}.action-icon-btn:hover{color:var(--text-main);background-color:#ffffff14}.theme-light .action-icon-btn:hover{color:var(--text-main);background-color:#0000000d}.action-icon-btn.active{color:var(--accent-color)!important;background-color:var(--accent-glow)!important}.action-icon-btn.active:hover{background-color:var(--accent-glow-hover, rgba(99, 102, 241, .2))!important}.action-icon-btn.delete-btn:hover{color:#f87171;background-color:#f871711a}.sidebar-footer{padding:12px;border-top:1px solid var(--border-color);display:flex;flex-direction:column;gap:8px}.sidebar-account-row{display:flex;align-items:center;gap:8px;min-width:0;padding:7px;background:var(--bg-primary);border:1px solid 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var(--border-color);display:flex;align-items:center;justify-content:space-between;z-index:5;flex-shrink:0}.file-info-container{display:flex;align-items:center;gap:8px;max-width:60%}.file-path{font-size:.8rem;color:var(--text-dark);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-name-title{font-family:Outfit,sans-serif;font-size:.95rem;font-weight:600;color:var(--text-main)}.save-status{display:flex;align-items:center;gap:5px;font-size:.75rem;color:var(--text-muted)}.save-indicator-dot{width:6px;height:6px;border-radius:50%;background-color:#10b981}.save-indicator-dot.saving{background-color:#fbbf24}@keyframes pulse-save{0%{opacity:.4;transform:scale(.9)}to{opacity:1;transform:scale(1.1)}}.editor-actions{display:flex;align-items:center;gap:8px}.header-icon-btn{background:var(--bg-primary);border:1px solid 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float-illustration{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.empty-title{font-family:Outfit,sans-serif;font-size:1.75rem;font-weight:700;margin-bottom:8px;color:var(--empty-title-color)}.empty-subtitle{font-size:.95rem;color:var(--text-muted);max-width:450px;margin:0 auto 28px}.quick-actions-grid{display:flex;flex-direction:column;gap:10px;width:100%;max-width:320px;margin:0 auto}.quick-action-card{display:flex;align-items:center;gap:12px;padding:12px 16px;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-main);text-align:left;cursor:pointer;transition:var(--transition-smooth)}.quick-action-card:hover{border-color:var(--tab-theme-color, var(--accent-color));background-color:var(--bg-tertiary);transform:translateY(-1px);box-shadow:0 4px 12px var(--tab-theme-shadow, rgba(0, 0, 0, .2))}.quick-action-card svg{color:var(--tab-theme-color, var(--accent-color))}.quick-action-text h4{font-size:.85rem;font-weight:600}.quick-action-text p{font-size:.75rem;color:var(--text-muted)}.sidebar-trigger-floating{position:absolute;left:12px;top:10px;z-index:100;width:36px;height:36px;border-radius:6px;background-color:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-main);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 12px #0000004d;transition:var(--transition-smooth)}.sidebar-trigger-floating:hover{background-color:var(--bg-tertiary);border-color:var(--accent-color)}.canvas-container .excalidraw{border:none!important;font-family:Inter,sans-serif!important}.canvas-container .excalidraw .layer-ui-trigger{border-radius:8px!important}.tab-bar-container{display:flex;align-items:center;justify-content:space-between;background-color:var(--bg-secondary);border-bottom:1px solid var(--border-color);height:32px;flex-shrink:0;z-index:6;position:relative;width:100%}.tab-bar{flex:1;display:flex;background-color:var(--bg-secondary);overflow:hidden;scrollbar-width:none;height:100%;transition:padding-left .3s cubic-bezier(.4,0,.2,1);min-width:0}.save-status-tab{display:flex;align-items:center;gap:6px;font-size:.75rem;color:var(--text-muted);padding:0 16px;background-color:var(--bg-secondary);height:100%;flex-shrink:0;border-left:1px solid var(--border-color);-webkit-user-select:none;user-select:none}.save-status-text{font-size:.75rem;color:var(--text-muted);white-space:nowrap}.tab-bar::-webkit-scrollbar{display:none}.tab-item{display:flex;align-items:center;gap:6px;padding:0 10px 0 12px;height:100%;border-right:1px solid var(--border-color);background-color:var(--tab-bg-inactive);color:var(--text-muted);font-size:.75rem;font-weight:500;cursor:pointer;-webkit-user-select:none;user-select:none;transition:var(--transition-smooth);position:relative;border-bottom:2px solid transparent;flex:1 1 154px;min-width:46px;max-width:190px;overflow:hidden}.tab-item:hover{background-color:var(--bg-tertiary);color:var(--text-main)}.tab-item.active{background-color:var(--bg-primary);color:var(--tab-active-color, #a78bfa);font-weight:600;border-bottom:2px solid var(--tab-active-color, var(--accent-color))}.tab-item.active .tab-title{color:var(--tab-active-color, currentColor)}.tab-title{white-space:nowrap;min-width:0;max-width:none;flex:1 1 auto;overflow:hidden;text-overflow:ellipsis}.tab-close-btn{background:transparent;border:none;color:var(--text-dark);border-radius:50%;display:flex;align-items:center;justify-content:center;width:15px;height:15px;cursor:pointer;transition:var(--transition-smooth);margin-left:2px}.tab-close-btn:hover{color:var(--text-main);background-color:#ffffff1f}.tab-item.pinned{width:34px!important;min-width:34px!important;max-width:34px!important;padding:0!important;justify-content:center!important}.tab-group-badge{display:flex;align-items:center;height:100%;padding:0 12px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;background-color:#ffffff05;border-right:1px solid var(--border-color);-webkit-user-select:none;user-select:none;cursor:default}.tab-group-badge span{opacity:.85}.tab-rename-input{background:var(--tab-bg-inactive, #1e2226);border:1px solid var(--accent-color, #8b5cf6);color:var(--text-main, #ffffff);font-size:.8rem;font-family:inherit;font-weight:500;outline:none;border-radius:4px;padding:1px 6px;width:110px;height:22px;text-align:left}.tab-item.active .tab-rename-input{background:var(--bg-primary, #0b0d0f)}.theme-light .tab-rename-input{background:#f4f4f5;border:1px solid var(--accent-color, #8b5cf6);color:#333}.theme-light .tab-item.active .tab-rename-input{background:#fff}.tab-add-btn{flex:0 0 34px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-muted, #9ca3af);width:34px;height:100%;cursor:pointer;transition:background-color .15s,color .15s;border-right:1px solid var(--border-color, #2d3139);flex-shrink:0}.theme-light .tab-add-btn{border-right:1px solid #e0e0e0}.tab-add-btn:hover{background-color:var(--bg-tertiary, #2a2e33);color:var(--text-main, #ffffff)}.theme-light .tab-add-btn:hover{background-color:#0000000d;color:#000}.tab-item.drag-over{border-bottom:2px dashed var(--accent-color, 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