@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap";:root{--bg-color:#fff;--bg-secondary:#f9f9f9;--text-primary:#111;--text-secondary:#666;--border-color:#e5e5e5;--accent-color:#000;--node-bg-user:#f2f2f2;--node-bg-ai:#fff;--shadow-sm:0 1px 2px #0000000a;--shadow-md:0 4px 12px #0000000f;--shadow-lg:0 12px 24px #00000014;--border-radius:12px;--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--stream-active:#2563eb;--stream-active-soft:#93c5fd;--search-match:#f59e0b;--warning:#b45309;--downstream-active:#0f766e;--selection-active:#111;--panel-bg:#ffffffeb;--chip-bg:#ffffffb8;--canvas-bg:#fafafa;--composer-radius:16px}.dark{--bg-color:#1a1a1a;--bg-secondary:#2a2a2a;--text-primary:#f5f5f5;--text-secondary:#a0a0a0;--border-color:#404040;--accent-color:#fff;--node-bg-user:#333;--node-bg-ai:#242424;--shadow-sm:0 1px 2px #0003;--shadow-md:0 4px 12px #0000004d;--shadow-lg:0 12px 24px #0006;--stream-active:#3b82f6;--stream-active-soft:#1e3a8a;--search-match:#d97706;--warning:#fbbf24;--downstream-active:#14b8a6;--selection-active:#fff;--panel-bg:#1e1e1eeb;--chip-bg:#2d2d2db8;--canvas-bg:#111}@media (prefers-color-scheme:dark){:root:not(.light){--bg-color:#1a1a1a;--bg-secondary:#2a2a2a;--text-primary:#f5f5f5;--text-secondary:#a0a0a0;--border-color:#404040;--accent-color:#fff;--node-bg-user:#333;--node-bg-ai:#242424;--shadow-sm:0 1px 2px #0003;--shadow-md:0 4px 12px #0000004d;--shadow-lg:0 12px 24px #0006;--stream-active:#3b82f6;--stream-active-soft:#1e3a8a;--search-match:#d97706;--warning:#fbbf24;--downstream-active:#14b8a6;--selection-active:#fff;--panel-bg:#1e1e1eeb;--chip-bg:#2d2d2db8;--canvas-bg:#111}}.react-flow__controls-button{background-color:var(--panel-bg)!important;fill:var(--text-primary)!important;border-bottom-color:var(--border-color)!important}.react-flow__controls-button:hover{background-color:var(--bg-secondary)!important}*{box-sizing:border-box;margin:0;padding:0}html,body{overscroll-behavior-x:none;width:100%;height:100%;overflow:hidden}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6;transition:background-color .3s,color .3s}#root{overscroll-behavior:none;width:100vw;height:100vh;overflow:hidden}.app-main-content{flex:1;min-width:0;height:100%;position:relative;overflow:hidden}.workspace-launcher{top:calc(24px + env(safe-area-inset-top));left:calc(24px + env(safe-area-inset-left));z-index:105;border:1px solid var(--border-color);min-height:40px;color:var(--text-primary);background-color:var(--panel-bg);box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:10px;align-items:center;gap:8px;padding:9px 12px;font-size:13px;font-weight:600;display:inline-flex;position:absolute}.workspace-save-status{top:calc(76px + env(safe-area-inset-top));right:calc(24px + env(safe-area-inset-right));z-index:105;border:1px solid var(--border-color);min-height:28px;color:var(--text-secondary);background-color:var(--panel-bg);box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:8px;align-items:center;gap:6px;padding:5px 10px;font-size:12px;font-weight:500;transition:color .18s,border-color .18s;display:inline-flex;position:absolute}.workspace-save-status__spinner{animation:1s linear infinite 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var(--border-color);height:38px;color:var(--text-primary);background-color:var(--bg-color);border-radius:8px;padding:0 10px}.workspace-overview__error{color:var(--warning);background-color:#f59e0b14;border:1px solid #b4530947;border-radius:8px;margin:12px 18px 0;padding:8px 10px;font-size:13px}.workspace-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;min-height:0;padding:18px;display:grid;overflow:auto}.workspace-card{border:1px solid var(--border-color);background-color:var(--bg-color);min-width:0;box-shadow:var(--shadow-sm);border-radius:8px;overflow:hidden}.workspace-card--active{border-color:var(--accent-color)}.workspace-card__preview{border-bottom:1px solid var(--border-color);background-color:var(--canvas-bg);justify-content:center;align-items:center;width:100%;height:118px;display:flex}.workspace-card__nodes{width:150px;height:70px;display:block;position:relative}.workspace-card__nodes span{border:1px solid 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var(--border-color)}.workspace-card__meta,.workspace-card__excerpt{color:var(--text-secondary);font-size:12px;line-height:18px}.workspace-card__excerpt{height:36px;margin-top:6px;overflow:hidden}.workspace-card__footer{align-items:center;gap:6px;margin-top:12px;display:flex}.workspace-card__active{color:var(--bg-color);background-color:var(--accent-color);border-radius:7px;padding:3px 7px;font-size:11px;font-weight:600}.workspace-card__spacer{flex:1}.workspace-empty{color:var(--text-secondary);text-align:center;grid-column:1/-1;padding:36px;font-size:14px}button{font-family:var(--font-family);cursor:pointer;background:0 0;border:none}input,textarea{font-family:var(--font-family)}.react-flow__node{border-radius:var(--border-radius)}.react-flow__attribution{display:none}.react-flow__node-messageNode{width:400px;height:auto!important}.canvas-mode{container-type:size}.canvas-toolbar{z-index:12;border:1px solid var(--border-color);background-color:var(--panel-bg);box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);-webkit-user-select:none;user-select:none;touch-action:none;border-radius:10px;align-items:center;gap:2px;padding:4px;display:inline-flex;position:absolute}.canvas-toolbar-grip{width:28px;height:32px;color:var(--text-secondary);cursor:grab;touch-action:none;background-color:#0000;border:none;border-radius:6px;justify-content:center;align-items:center;display:inline-flex}.canvas-toolbar-grip:active{cursor:grabbing}.canvas-toolbar-button{min-width:32px;height:32px;color:var(--text-primary);cursor:pointer;background-color:#0000;border:none;border-radius:6px;justify-content:center;align-items:center;gap:5px;padding:0 8px;font-size:12px;font-weight:500;transition:background-color .12s;display:inline-flex}.canvas-toolbar-button:hover{background-color:var(--bg-secondary)}.canvas-toolbar-button-wide{padding:0 10px}.canvas-toolbar-button[data-active=true]{color:var(--bg-color);background-color:var(--accent-color)}.canvas-toolbar-button[data-active=true]:hover{background-color:var(--accent-color)}.canvas-toolbar-divider{background-color:var(--border-color);align-self:stretch;width:1px;margin:4px 3px}.canvas-selected-actions{z-index:20;border:1px solid var(--border-color);background-color:var(--panel-bg);box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:10px;align-items:center;gap:6px;padding:4px;display:inline-flex;position:absolute;bottom:136px;left:24px}.canvas-selected-action-button{width:30px;height:30px;color:var(--text-primary);cursor:pointer;background-color:#0000;border:none;border-radius:7px;justify-content:center;align-items:center;display:inline-flex}.canvas-selected-action-button:hover{background-color:var(--bg-secondary)}.canvas-selected-action-button-danger{color:#b91c1c}.canvas-metadata-editor{z-index:20;border:1px solid var(--border-color);border-radius:var(--border-radius);background-color:var(--panel-bg);width:248px;box-shadow:var(--shadow-sm);color:var(--text-primary);gap:9px;padding:12px;display:grid;position:absolute;bottom:180px;left:24px}.canvas-metadata-editor-heading{color:var(--text-secondary);text-transform:uppercase;font-size:11px;font-weight:700}.canvas-metadata-editor label{color:var(--text-secondary);gap:4px;font-size:11px;display:grid}.canvas-metadata-editor input:not([type=color]):not([type=range]),.canvas-metadata-editor textarea{box-sizing:border-box;border:1px solid var(--border-color);background:var(--bg-color);width:100%;color:var(--text-primary);font:inherit;resize:vertical;border-radius:5px;padding:6px 7px;font-size:12px;line-height:1.35}.canvas-metadata-editor-region-style{grid-template-columns:64px minmax(0,1fr);gap:10px;display:grid}.canvas-metadata-editor input[type=color]{border:1px solid var(--border-color);background:var(--bg-color);border-radius:5px;width:100%;height:27px;padding:2px}.canvas-metadata-editor input[type=range]{width:100%;margin:5px 0 0}.canvas-metadata-editor button{border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-primary);cursor:pointer;font:inherit;border-radius:5px;justify-self:end;padding:6px 8px;font-size:12px}.canvas-metadata-editor button:hover{background:var(--bg-color)}.canvas-note-node{border:1px solid var(--border-color);border-radius:var(--border-radius);background-color:var(--panel-bg);width:100%;min-width:0;box-shadow:var(--shadow-md);color:var(--text-primary);cursor:pointer;padding:12px 14px;transition:border-color .16s,box-shadow .16s,transform .16s}.canvas-note-node.selected{border-color:var(--selection-active);box-shadow:0 0 0 3px #1111111a, var(--shadow-md)}.canvas-note-node-header{color:var(--text-secondary);text-transform:uppercase;justify-content:space-between;align-items:center;gap:7px;margin-bottom:8px;font-size:12px;font-weight:650;display:flex}.canvas-note-node-title{align-items:center;gap:7px;min-width:0;display:flex}.canvas-note-node-title span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.canvas-note-node-action{width:24px;height:24px;color:var(--text-secondary);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:6px;flex:none;justify-content:center;align-items:center;display:inline-flex}.canvas-note-node-action:hover{border-color:var(--border-color);color:var(--text-primary);background:var(--bg-color)}.canvas-note-node-content{resize:none;width:100%;min-height:88px;color:var(--text-primary);font:inherit;white-space:pre-wrap;overflow-wrap:anywhere;background:0 0;border:0;outline:0;margin:0;padding:0;font-size:13px;line-height:1.45;display:block}.canvas-note-node-content::placeholder{color:var(--text-tertiary)}.canvas-media-node{border:1px solid var(--border-color);border-radius:var(--border-radius);background:var(--panel-bg);width:100%;height:100%;box-shadow:var(--shadow-md);cursor:pointer;grid-template-rows:auto minmax(0,1fr);display:grid;overflow:hidden}.canvas-media-node.selected{border-color:var(--selection-active);box-shadow:0 0 0 3px #1111111a, var(--shadow-md)}.canvas-media-node-header{min-width:0;color:var(--text-secondary);align-items:center;gap:6px;padding:8px 10px;font-size:12px;font-weight:650;display:flex}.canvas-media-node-header span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.canvas-media-node-content{background:var(--bg-secondary);object-fit:contain;border:0;width:100%;min-height:0;display:block}.canvas-region-node{border:1px solid var(--selection-active);border-radius:var(--border-radius);pointer-events:none;min-width:100%;min-height:100%;position:relative}.canvas-region-node-label{max-width:calc(100% - 24px);color:var(--text-primary);flex-direction:column;gap:2px;font-size:12px;line-height:1.25;display:flex;position:absolute;top:8px;left:12px}.canvas-region-node-label strong,.canvas-region-node-label span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.message-node-drag-handle{display:none}.message-text-selectable{-webkit-user-select:text;user-select:text;cursor:text}@media (width<=768px){.desktop-only{display:none!important}.canvas-toolbar{top:calc(72px + env(safe-area-inset-top));left:16px}.canvas-selected-actions{left:16px;bottom:calc(132px + env(safe-area-inset-bottom))}.canvas-metadata-editor{left:16px;bottom:calc(190px + env(safe-area-inset-bottom))}.canvas-selected-action-button{width:42px;height:42px}.floating-controls{gap:8px!important}.floating-control-button,.auth-sign-in-button,.auth-account-button{justify-content:center!important;width:42px!important;min-width:42px!important;height:42px!important;padding:0!important}.auth-sign-in-label{display:none!important}.react-flow__node-messageNode{width:min(400px,100vw - 32px)!important}.react-flow__resize-control{display:none!important}.canvas-node-mobile .message-node{padding-top:44px!important}.mobile-node-move-enabled .message-node-drag-handle{border:1px solid var(--border-color);width:52px;height:28px;color:var(--text-secondary);background:var(--bg-color);box-shadow:var(--shadow-sm);touch-action:none;cursor:grab;border-radius:999px;justify-content:center;align-items:center;display:inline-flex;position:absolute;top:8px;left:50%;transform:translate(-50%)}.mobile-node-move-enabled .message-node-drag-handle:active{cursor:grabbing}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}@keyframes reasoningPulse{0%,to{opacity:.35}50%{opacity:1}}@keyframes streamCursorBlink{0%,45%{opacity:1}55%,to{opacity:0}}.reasoning-pulse-dot{animation:1.2s ease-in-out infinite reasoningPulse}.stream-caret{width:7px;color:var(--stream-active);-webkit-user-select:none;user-select:none;margin-left:1px;animation:1s step-end infinite streamCursorBlink;display:inline-block}.chat-scroll-container{width:100%;height:100%;overflow-y:auto}.chat-empty-greeting{height:100%;color:var(--text-primary);flex-direction:column;justify-content:center;align-items:center;max-width:768px;margin:0 auto;padding:20px 20px 100px;display:flex}.chat-empty-greeting-icon{background-color:var(--accent-color);width:56px;height:56px;color:var(--bg-color);box-shadow:var(--shadow-md);border-radius:16px;justify-content:center;align-items:center;margin-bottom:24px;display:flex}.chat-empty-greeting h1{text-align:center;margin-bottom:16px;font-size:32px;font-weight:600}.chat-empty-greeting p{color:var(--text-secondary);text-align:center;font-size:16px}.chat-thread{flex-direction:column;gap:24px;max-width:768px;margin:0 auto;padding:40px 20px 140px;display:flex}.chat-thread-spacer{height:1px}.chat-message-card{border:1px solid var(--border-color);border-radius:var(--border-radius);width:min(680px,100%);box-shadow:var(--shadow-sm);color:var(--text-primary);padding:14px 16px}.chat-message-card.user{background-color:var(--node-bg-user);align-self:flex-end}.chat-message-card.ai{background-color:var(--node-bg-ai);align-self:flex-start}.chat-message-card.preview{cursor:pointer}.chat-message-card-header{color:var(--text-secondary);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;font-size:14px;display:flex}.chat-message-card-role{align-items:center;gap:8px;font-weight:600;display:flex}.chat-message-card-icon{background-color:var(--bg-secondary);width:28px;height:28px;color:var(--text-primary);border-radius:8px;justify-content:center;align-items:center;display:inline-flex}.chat-message-card.ai .chat-message-card-icon{background-color:var(--accent-color);color:var(--bg-color)}.chat-message-card-meta{align-items:center;gap:6px;display:flex}.chat-message-card-timestamp{white-space:nowrap;font-size:11px;font-weight:400}.chat-message-card-collapse-btn{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:4px;display:flex}.chat-message-edit{flex-direction:column;gap:8px;width:100%;margin-top:4px;display:flex}.chat-message-edit-textarea{border:1px solid var(--border-color);background-color:var(--bg-color);width:100%;min-height:80px;color:var(--text-primary);resize:vertical;font-size:14px;line-height:1.5;font-family:var(--font-family);border-radius:8px;outline:none;padding:10px 12px}.chat-message-edit-actions{justify-content:flex-end;gap:8px;display:flex}.chat-message-edit-cancel{border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;background-color:#0000;border-radius:6px;padding:6px 12px;font-size:12px;font-weight:500}.chat-message-edit-save{background-color:var(--accent-color);color:var(--bg-color);cursor:pointer;border:none;border-radius:6px;padding:6px 12px;font-size:12px;font-weight:500}.chat-branch-group{flex-direction:column;gap:10px;display:flex}.chat-branch-group-controls{justify-content:center;align-items:center;gap:10px;display:flex}.chat-branch-nav-btn{width:28px;height:28px;color:var(--text-primary);border:1px solid var(--border-color);background-color:var(--panel-bg);box-shadow:var(--shadow-sm);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;display:inline-flex}.chat-branch-dots{align-items:center;gap:6px;display:inline-flex}.chat-branch-dot{background-color:var(--border-color);cursor:pointer;border:none;border-radius:50%;width:8px;height:8px;padding:0}.chat-branch-dot.active{background-color:var(--accent-color)}.chat-branch-strip{overflow:hidden}.chat-branch-track{will-change:transform;gap:12px;transition:transform .22s;display:flex}.chat-branch-card{flex:none}.chat-branch-card.active{width:min(680px,100%)}.chat-branch-card.inactive{opacity:.52;width:min(240px,42vw)}.chat-branch-preview-text{color:var(--text-secondary);-webkit-line-clamp:4;white-space:pre-wrap;word-break:break-word;-webkit-box-orient:vertical;margin:0;font-size:13px;line-height:1.45;display:-webkit-box;overflow:hidden}.chat-message-container{border-radius:8px;gap:16px;width:100%;min-width:0;padding:8px;transition:background-color .2s;display:flex}.chat-message-container:hover{background-color:var(--bg-secondary)}.chat-message-actions{opacity:0;align-items:center;gap:8px;margin-top:8px;transition:opacity .2s;display:flex}.chat-message-container:hover .chat-message-actions,.chat-message-card:hover .chat-message-actions,.chat-message-card:focus-within .chat-message-actions{opacity:1}@media (width<=768px){.chat-message-actions{opacity:.8}}.chat-action-btn{color:var(--text-secondary);border:1px solid 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