.file-selector{width:100%;height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1a0a0a 0%,#2d1810 50%,#4a2820 100%);position:relative;overflow:hidden}.file-selector:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 70% 30%,rgba(255,193,7,.1) 0%,transparent 50%);pointer-events:none}.file-selector-content{text-align:center;padding:60px 50px;background:rgba(248,241,227,.98);border-radius:24px;box-shadow:0 25px 70px #00000080;max-width:550px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:relative;z-index:1}.file-selector .icon{font-size:72px;margin-bottom:24px}.file-selector h1{margin:0 0 12px;font-size:36px;color:#2d1810;font-weight:700;letter-spacing:-.5px}.file-selector p{margin:0 0 32px;font-size:15px;color:#6d5a4a;line-height:1.6}.action-buttons{display:flex;gap:16px;justify-content:center;margin-bottom:8px}.create-ai-btn,.select-file-btn{flex:1;padding:16px 32px;border:none;border-radius:12px;font-size:16px;font-weight:700;cursor:pointer;transition:all .3s;max-width:220px}.create-ai-btn{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;box-shadow:0 6px 16px #667eea66}.create-ai-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px #667eea80}.select-file-btn{background:#ffc107;color:#2d1810;box-shadow:0 6px 16px #ffc10766}.select-file-btn:hover{background:#ffcd38;transform:translateY(-2px);box-shadow:0 8px 24px #ffc10780}.info{margin-top:36px;padding-top:28px;border-top:1px solid rgba(93,74,58,.2)}.info-text{margin:8px 0;font-size:13px;color:#8d7a6a}.react-flow{direction:ltr}.react-flow__container{position:absolute;width:100%;height:100%;top:0;left:0}.react-flow__pane{z-index:1;cursor:-webkit-grab;cursor:grab}.react-flow__pane.selection{cursor:pointer}.react-flow__pane.dragging{cursor:-webkit-grabbing;cursor:grabbing}.react-flow__viewport{transform-origin:0 0;z-index:2;pointer-events:none}.react-flow__renderer{z-index:4}.react-flow__selection{z-index:6}.react-flow__nodesselection-rect:focus,.react-flow__nodesselection-rect:focus-visible{outline:none}.react-flow .react-flow__edges{pointer-events:none;overflow:visible}.react-flow__edge-path,.react-flow__connection-path{stroke:#b1b1b7;stroke-width:1;fill:none}.react-flow__edge{pointer-events:visibleStroke;cursor:pointer}.react-flow__edge.animated path{stroke-dasharray:5;-webkit-animation:dashdraw .5s linear infinite;animation:dashdraw .5s linear infinite}.react-flow__edge.animated path.react-flow__edge-interaction{stroke-dasharray:none;-webkit-animation:none;animation:none}.react-flow__edge.inactive{pointer-events:none}.react-flow__edge.selected,.react-flow__edge:focus,.react-flow__edge:focus-visible{outline:none}.react-flow__edge.selected .react-flow__edge-path,.react-flow__edge:focus .react-flow__edge-path,.react-flow__edge:focus-visible .react-flow__edge-path{stroke:#555}.react-flow__edge-textwrapper{pointer-events:all}.react-flow__edge-textbg{fill:#fff}.react-flow__edge .react-flow__edge-text{pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.react-flow__connection{pointer-events:none}.react-flow__connection .animated{stroke-dasharray:5;-webkit-animation:dashdraw .5s linear infinite;animation:dashdraw .5s linear infinite}.react-flow__connectionline{z-index:1001}.react-flow__nodes{pointer-events:none;transform-origin:0 0}.react-flow__node{position:absolute;-webkit-user-select:none;-moz-user-select:none;user-select:none;pointer-events:all;transform-origin:0 0;box-sizing:border-box;cursor:-webkit-grab;cursor:grab}.react-flow__node.dragging{cursor:-webkit-grabbing;cursor:grabbing}.react-flow__nodesselection{z-index:3;transform-origin:left top;pointer-events:none}.react-flow__nodesselection-rect{position:absolute;pointer-events:all;cursor:-webkit-grab;cursor:grab}.react-flow__handle{position:absolute;pointer-events:none;min-width:5px;min-height:5px;width:6px;height:6px;background:#1a192b;border:1px solid white;border-radius:100%}.react-flow__handle.connectionindicator{pointer-events:all;cursor:crosshair}.react-flow__handle-bottom{top:auto;left:50%;bottom:-4px;transform:translate(-50%)}.react-flow__handle-top{left:50%;top:-4px;transform:translate(-50%)}.react-flow__handle-left{top:50%;left:-4px;transform:translateY(-50%)}.react-flow__handle-right{right:-4px;top:50%;transform:translateY(-50%)}.react-flow__edgeupdater{cursor:move;pointer-events:all}.react-flow__panel{position:absolute;z-index:5;margin:15px}.react-flow__panel.top{top:0}.react-flow__panel.bottom{bottom:0}.react-flow__panel.left{left:0}.react-flow__panel.right{right:0}.react-flow__panel.center{left:50%;transform:translate(-50%)}.react-flow__attribution{font-size:10px;background:rgba(255,255,255,.5);padding:2px 3px;margin:0}.react-flow__attribution a{text-decoration:none;color:#999}@-webkit-keyframes dashdraw{0%{stroke-dashoffset:10}}@keyframes dashdraw{0%{stroke-dashoffset:10}}.react-flow__edgelabel-renderer{position:absolute;width:100%;height:100%;pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.react-flow__edge.updating .react-flow__edge-path{stroke:#777}.react-flow__edge-text{font-size:10px}.react-flow__node.selectable:focus,.react-flow__node.selectable:focus-visible{outline:none}.react-flow__node-default,.react-flow__node-input,.react-flow__node-output,.react-flow__node-group{padding:10px;border-radius:3px;width:150px;font-size:12px;color:#222;text-align:center;border-width:1px;border-style:solid;border-color:#1a192b;background-color:#fff}.react-flow__node-default.selectable:hover,.react-flow__node-input.selectable:hover,.react-flow__node-output.selectable:hover,.react-flow__node-group.selectable:hover{box-shadow:0 1px 4px 1px #00000014}.react-flow__node-default.selectable.selected,.react-flow__node-default.selectable:focus,.react-flow__node-default.selectable:focus-visible,.react-flow__node-input.selectable.selected,.react-flow__node-input.selectable:focus,.react-flow__node-input.selectable:focus-visible,.react-flow__node-output.selectable.selected,.react-flow__node-output.selectable:focus,.react-flow__node-output.selectable:focus-visible,.react-flow__node-group.selectable.selected,.react-flow__node-group.selectable:focus,.react-flow__node-group.selectable:focus-visible{box-shadow:0 0 0 .5px #1a192b}.react-flow__node-group{background-color:#f0f0f040}.react-flow__nodesselection-rect,.react-flow__selection{background:rgba(0,89,220,.08);border:1px dotted rgba(0,89,220,.8)}.react-flow__nodesselection-rect:focus,.react-flow__nodesselection-rect:focus-visible,.react-flow__selection:focus,.react-flow__selection:focus-visible{outline:none}.react-flow__controls{box-shadow:0 0 2px 1px #00000014}.react-flow__controls-button{border:none;background:#fefefe;border-bottom:1px solid #eee;box-sizing:content-box;display:flex;justify-content:center;align-items:center;width:16px;height:16px;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none;padding:5px}.react-flow__controls-button:hover{background:#f4f4f4}.react-flow__controls-button svg{width:100%;max-width:12px;max-height:12px}.react-flow__controls-button:disabled{pointer-events:none}.react-flow__controls-button:disabled svg{fill-opacity:.4}.react-flow__minimap{background-color:#fff}.react-flow__minimap svg{display:block}.react-flow__resize-control{position:absolute}.react-flow__resize-control.left,.react-flow__resize-control.right{cursor:ew-resize}.react-flow__resize-control.top,.react-flow__resize-control.bottom{cursor:ns-resize}.react-flow__resize-control.top.left,.react-flow__resize-control.bottom.right{cursor:nwse-resize}.react-flow__resize-control.bottom.left,.react-flow__resize-control.top.right{cursor:nesw-resize}.react-flow__resize-control.handle{width:4px;height:4px;border:1px solid #fff;border-radius:1px;background-color:#3367d9;transform:translate(-50%,-50%)}.react-flow__resize-control.handle.left{left:0;top:50%}.react-flow__resize-control.handle.right{left:100%;top:50%}.react-flow__resize-control.handle.top{left:50%;top:0}.react-flow__resize-control.handle.bottom{left:50%;top:100%}.react-flow__resize-control.handle.top.left,.react-flow__resize-control.handle.bottom.left{left:0}.react-flow__resize-control.handle.top.right,.react-flow__resize-control.handle.bottom.right{left:100%}.react-flow__resize-control.line{border-color:#3367d9;border-width:0;border-style:solid}.react-flow__resize-control.line.left,.react-flow__resize-control.line.right{width:1px;transform:translate(-50%);top:0;height:100%}.react-flow__resize-control.line.left{left:0;border-left-width:1px}.react-flow__resize-control.line.right{left:100%;border-right-width:1px}.react-flow__resize-control.line.top,.react-flow__resize-control.line.bottom{height:1px;transform:translateY(-50%);left:0;width:100%}.react-flow__resize-control.line.top{top:0;border-top-width:1px}.react-flow__resize-control.line.bottom{border-bottom-width:1px;top:100%}.diagram-viewer{width:100%;height:100%;display:flex;flex-direction:column;background:#f5ede0}.diagram-header{display:flex;justify-content:space-between;align-items:center;padding:80px 24px 14px;background:#2d1810;border-bottom:none;box-shadow:0 4px 12px #2d18104d;gap:24px}.diagram-header>div:first-child{flex:1;min-width:0;margin:0 auto;max-width:900px}.diagram-header h2{margin:0 0 6px;font-size:20px;color:#fff;font-weight:700;letter-spacing:-.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.diagram-type{display:inline-flex;padding:3px 10px;background:rgba(255,193,7,.2);color:#ffc107;border-radius:10px;font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;border:1px solid rgba(255,193,7,.3);align-items:center;margin-bottom:4px}.diagram-description-box{padding:0;background:transparent;border:none;border-radius:0}.diagram-description-box p{margin:0;font-size:11px;line-height:1.4;color:#ffffffb3;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}.export-buttons{display:flex;gap:10px;flex-shrink:0;margin-left:auto}.export-btn{padding:10px 20px;background:rgba(255,193,7,.15);color:#ffc107;border:1px solid rgba(255,193,7,.3);border-radius:20px;font-size:13px;font-weight:700;cursor:pointer;transition:all .2s;box-shadow:0 3px 10px #2d181033;white-space:nowrap}.export-btn:hover:not(:disabled){background:rgba(255,193,7,.25);transform:translateY(-2px);box-shadow:0 6px 16px #ffc10733;border-color:#ffc10780}.export-btn:disabled{background:rgba(109,90,74,.3);color:#ffc10766;cursor:not-allowed;opacity:.6;box-shadow:none;border-color:#6d5a4a4d}.diagram-container{flex:1;background:#f5ede0}.react-flow__node{cursor:pointer;transition:all .2s}.react-flow__node:hover{transform:scale(1.02);box-shadow:0 4px 12px #00000026}.react-flow__edge-path{transition:stroke .2s}.react-flow__edge:hover .react-flow__edge-path{stroke:#4a90e2;stroke-width:3}.custom-node-wrapper{width:100%;display:flex;flex-direction:column;height:100%}.custom-node-label{white-space:pre-line;text-align:center;font-size:14px;font-weight:700;line-height:1.3;color:inherit;word-wrap:break-word}.custom-node-description{margin-top:8px;padding-top:8px;border-top:1px solid rgba(0,0,0,.15);font-size:11px;line-height:1.5;text-align:left;white-space:normal;font-weight:400;color:inherit;opacity:.9;word-wrap:break-word;overflow-wrap:break-word}.react-flow__node{box-shadow:0 2px 8px #0000001a;transition:box-shadow .2s,transform .2s;height:auto!important}.react-flow__node.selected{box-shadow:0 4px 16px #0003}.diagram-chat{display:flex;flex-direction:column;height:100%;background:white;border-radius:12px;box-shadow:0 2px 8px #0000001a;overflow:hidden}.chat-header{padding:20px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border-bottom:1px solid rgba(255,255,255,.1)}.chat-header h2{margin:0 0 5px;font-size:1.5rem;font-weight:600}.chat-subtitle{margin:0;opacity:.9;font-size:.9rem}.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.chat-welcome{text-align:center;padding:40px 20px;color:#666}.welcome-icon{font-size:4rem;margin-bottom:20px}.chat-welcome h3{margin:0 0 10px;color:#333;font-size:1.5rem}.chat-welcome>p{margin:0 0 30px;color:#666}.example-prompts{display:flex;flex-direction:column;gap:10px;max-width:500px;margin:0 auto}.example-title{font-weight:600;color:#333;margin-bottom:5px;font-size:.9rem}.example-prompt{background:#f5f5ff;border:1px solid #e0e0ff;border-radius:8px;padding:12px 16px;text-align:left;cursor:pointer;transition:all .2s;font-size:.9rem;color:#667eea}.example-prompt:hover{background:#ebebff;border-color:#667eea;transform:translateY(-1px)}.chat-message{display:flex;gap:12px;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.chat-message.user{flex-direction:row-reverse}.message-avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0;background:#f0f0f0}.chat-message.user .message-avatar{background:#667eea}.chat-message.assistant .message-avatar{background:#764ba2}.message-content{flex:1;max-width:70%}.chat-message.user .message-content{display:flex;flex-direction:column;align-items:flex-end}.message-text{padding:12px 16px;border-radius:12px;word-wrap:break-word;line-height:1.5}.chat-message.user .message-text{background:#667eea;color:#fff;border-bottom-right-radius:4px}.chat-message.assistant .message-text{background:#f5f5f5;color:#333;border-bottom-left-radius:4px}.message-badge{display:inline-block;padding:4px 12px;background:#4caf50;color:#fff;border-radius:12px;font-size:.75rem;margin-top:6px;font-weight:500}.message-time{font-size:.7rem;color:#999;margin-top:4px;padding:0 4px}.typing-indicator{display:flex;gap:4px;padding:12px 16px;background:#f5f5f5;border-radius:12px 12px 12px 4px}.typing-indicator span{width:8px;height:8px;border-radius:50%;background:#999;animation:typing 1.4s infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.5}30%{transform:translateY(-10px);opacity:1}}.chat-input-form{display:flex;gap:10px;padding:16px;background:white;border-top:1px solid #e0e0e0}.chat-input{flex:1;padding:12px 16px;border:2px solid #e0e0e0;border-radius:24px;font-size:.95rem;font-family:inherit;resize:none;outline:none;transition:border-color .2s;min-height:44px;max-height:120px}.chat-input:focus{border-color:#667eea}.chat-input:disabled{background:#f5f5f5;cursor:not-allowed}.chat-send-button{width:44px;height:44px;border:none;border-radius:50%;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;font-size:1.2rem;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center;flex-shrink:0}.chat-send-button:hover:not(:disabled){transform:scale(1.05);box-shadow:0 4px 12px #667eea66}.chat-send-button:disabled{opacity:.5;cursor:not-allowed;transform:none}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:#f1f1f1}.chat-messages::-webkit-scrollbar-thumb{background:#888;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#555}.diagram-creator{display:flex;flex-direction:column;height:100vh;background:#f8f9fa}.error-banner{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:#ff4444;color:#fff;font-size:.9rem}.error-banner button{background:none;border:none;color:#fff;font-size:1.2rem;cursor:pointer;padding:0 8px}.creator-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:white;border-bottom:1px solid #e0e0e0;box-shadow:0 2px 4px #0000000d}.creator-header h1{margin:0;font-size:1.5rem;font-weight:600;color:#333}.header-actions{display:flex;gap:10px}.header-button{padding:8px 16px;border:1px solid #e0e0e0;border-radius:8px;background:white;color:#333;font-size:.9rem;cursor:pointer;transition:all .2s;font-weight:500}.header-button:hover{background:#f5f5f5;border-color:#667eea;transform:translateY(-1px)}.header-button.reset{background:#ff6b6b;color:#fff;border-color:#ff6b6b}.header-button.reset:hover{background:#ff5252;border-color:#ff5252}.header-button.back{background:#6c757d;color:#fff;border-color:#6c757d}.header-button.back:hover{background:#5a6268;border-color:#5a6268}.creator-content{flex:1;display:grid;grid-template-columns:400px 1fr;gap:0;overflow:hidden}.chat-panel{height:100%;border-right:1px solid #e0e0e0;background:white}.diagram-panel{height:100%;overflow:auto;background:#f8f9fa}.diagram-container{height:100%;display:flex;flex-direction:column}.diagram-info{padding:20px 24px;background:white;border-bottom:1px solid #e0e0e0}.diagram-info h2{margin:0 0 8px;font-size:1.3rem;color:#333}.diagram-description{margin:0 0 12px;color:#666;font-size:.9rem;line-height:1.5}.diagram-stats{display:flex;gap:16px;align-items:center}.stat{font-size:.85rem;color:#666}.stat strong{color:#667eea;font-weight:600}.stat.badge{background:#667eea;color:#fff;padding:4px 12px;border-radius:12px;font-weight:500;text-transform:capitalize}.diagram-viewer-wrapper{flex:1;min-height:0;background:white}.diagram-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:40px;text-align:center;color:#666}.placeholder-icon{font-size:5rem;margin-bottom:20px;opacity:.6}.diagram-placeholder h3{margin:0 0 10px;font-size:1.5rem;color:#333}.diagram-placeholder>p{margin:0 0 30px;color:#666;max-width:400px}.placeholder-tips{background:#f5f5ff;border:1px solid #e0e0ff;border-radius:12px;padding:20px;text-align:left;max-width:500px}.placeholder-tips h4{margin:0 0 12px;color:#667eea;font-size:1rem}.placeholder-tips ul{margin:0;padding-left:20px;color:#666;line-height:1.8}.placeholder-tips li{font-size:.9rem}.versions-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.versions-content{background:white;border-radius:12px;width:90%;max-width:600px;max-height:80vh;display:flex;flex-direction:column;animation:slideUp .3s}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.versions-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid #e0e0e0}.versions-header h3{margin:0;font-size:1.2rem;color:#333}.versions-header button{background:none;border:none;font-size:1.5rem;color:#999;cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s}.versions-header button:hover{background:#f5f5f5;color:#333}.versions-list{overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:12px}.version-item{display:flex;justify-content:space-between;align-items:center;padding:16px;background:#f8f9fa;border:1px solid #e0e0e0;border-radius:8px;transition:all .2s}.version-item:hover{border-color:#667eea;background:#f5f5ff}.version-info{flex:1}.version-number{font-weight:600;color:#667eea;font-size:.9rem;margin-bottom:4px}.version-time{font-size:.75rem;color:#999;margin-bottom:6px}.version-message{font-size:.85rem;color:#666;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:400px}.version-load-button{padding:6px 16px;background:#667eea;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:.85rem;font-weight:500;transition:all .2s}.version-load-button:hover{background:#5568d3;transform:translateY(-1px)}@media (max-width: 1024px){.creator-content{grid-template-columns:350px 1fr}}@media (max-width: 768px){.creator-content{grid-template-columns:1fr;grid-template-rows:50vh 1fr}.chat-panel{border-right:none;border-bottom:1px solid #e0e0e0}}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#1a0a0a 0%,#2d1810 50%,#4a2820 100%);padding:20px;position:relative;overflow:hidden}.login-container:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 30% 50%,rgba(255,193,7,.1) 0%,transparent 50%);pointer-events:none}.login-card{background:rgba(248,241,227,.98);border-radius:24px;box-shadow:0 25px 70px #00000080;max-width:450px;width:100%;overflow:hidden;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.login-header{background:transparent;color:#2d1810;padding:40px 30px 20px;text-align:center}.login-header h1{margin:0 0 8px;font-size:36px;font-weight:700;color:#2d1810;letter-spacing:-.5px}.login-header p{margin:0;font-size:15px;color:#5d4a3a;font-weight:400}.login-content{padding:30px 30px 40px;text-align:center}.login-content h2{margin:0 0 12px;font-size:22px;color:#2d1810;font-weight:600}.login-content p{margin:0 0 32px;font-size:14px;color:#6d5a4a;line-height:1.6}.login-button-container{display:flex;justify-content:center;margin:30px 0}.login-footer{background:rgba(245,237,220,.5);padding:20px 30px;text-align:center;border-top:1px solid rgba(93,74,58,.1)}.login-footer p{margin:0;font-size:12px;color:#8d7a6a}@media (max-width: 600px){.login-card{max-width:100%}.login-header{padding:30px 20px}.login-header h1{font-size:26px}.login-content{padding:30px 20px}.login-content h2{font-size:24px}}*{box-sizing:border-box}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f5ede0}.app{width:100%;height:100vh;overflow:hidden;background:#f5ede0;display:flex;flex-direction:column}.error-banner{position:fixed;top:0;left:0;right:0;padding:16px 24px;background:#e74c3c;color:#fff;display:flex;justify-content:space-between;align-items:center;z-index:1000;box-shadow:0 2px 8px #0003}.error-banner span{font-size:14px;font-weight:500}.error-banner button{background:transparent;border:none;color:#fff;font-size:20px;cursor:pointer;padding:0 8px;transition:opacity .2s}.error-banner button:hover{opacity:.8}.back-button{position:fixed;top:16px;left:16px;padding:12px 24px;background:rgba(45,24,16,.95);border:1px solid rgba(255,193,7,.3);border-radius:24px;font-size:14px;font-weight:600;color:#ffc107;cursor:pointer;z-index:100;box-shadow:0 4px 12px #2d18104d;transition:all .2s}.back-button:hover{background:rgba(45,24,16,1);transform:translate(-2px);box-shadow:0 6px 16px #2d181066;border-color:#ffc10780}.user-menu{position:fixed;top:16px;right:16px;display:flex;align-items:center;gap:12px;padding:8px 20px;background:rgba(45,24,16,.95);border:1px solid rgba(255,193,7,.3);border-radius:28px;z-index:100;box-shadow:0 4px 12px #2d18104d}.user-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;border:2px solid #ffc107}.user-name{font-size:14px;font-weight:600;color:#ffc107}.logout-button{padding:8px 18px;background:rgba(255,193,7,.15);color:#ffc107;border:1px solid rgba(255,193,7,.3);border-radius:20px;font-size:13px;font-weight:600;cursor:pointer;transition:all .2s}.logout-button:hover{background:rgba(255,193,7,.25);transform:translateY(-1px);box-shadow:0 4px 8px #ffc10733;border-color:#ffc10780}.mode-selector{display:flex;justify-content:center;gap:20px;padding:40px 20px 20px;max-width:800px;margin:0 auto}.select-mode-wrapper{flex:1;display:flex;flex-direction:column;overflow:hidden}.mode-button{flex:1;padding:20px 32px;background:rgba(45,24,16,.95);border:2px solid rgba(255,193,7,.3);border-radius:16px;font-size:16px;font-weight:600;color:#ffc107;cursor:pointer;transition:all .3s;box-shadow:0 4px 12px #2d18104d}.mode-button:hover{background:rgba(45,24,16,1);transform:translateY(-2px);box-shadow:0 8px 20px #2d181066;border-color:#ffc10799}.mode-button.primary{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-color:transparent;color:#fff;box-shadow:0 4px 16px #667eea4d}.mode-button.primary:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 8px 24px #667eea66}.creator-wrapper{position:relative;width:100%;height:100vh}.back-button-absolute{position:absolute;top:16px;left:16px;padding:8px 16px;background:rgba(255,255,255,.95);border:1px solid #e0e0e0;border-radius:8px;font-size:14px;font-weight:600;color:#333;cursor:pointer;z-index:1001;box-shadow:0 2px 8px #0000001a;transition:all .2s}.back-button-absolute:hover{background:white;transform:translate(-2px);box-shadow:0 4px 12px #00000026}