.chat-panel{order:999;width:25%;min-width:320px;max-width:450px;height:100vh;background-color:#fff;border-right:1px solid #e5e7eb;display:flex;flex-direction:column;box-shadow:4px 0 15px #00000008;z-index:10}.chat-panel-header{padding:24px 20px 16px;border-bottom:1px solid #f3f4f6;background-color:#fff}.chat-panel-header h2{margin:0 0 8px;font-size:1.25rem;color:#111827;font-weight:600}.chat-panel-header p{margin:0;font-size:.85rem;color:#6b7280;line-height:1.4}.chat-panel-content{flex:1;background-color:#f9fafb;padding:16px;overflow-y:auto;display:flex;flex-direction:column;justify-content:flex-end}.chat-input-container{padding:16px 20px 24px;background-color:#fff;border-top:1px solid #f3f4f6;display:flex;flex-direction:column;gap:12px}.provider-field{display:flex;flex-direction:column;gap:6px}.provider-label{font-size:.82rem;color:#4b5563;font-weight:600}.provider-select{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:.92rem;background-color:#f9fafb;color:#111827;outline:none;box-sizing:border-box}.provider-select:focus{border-color:#3b82f6;background-color:#fff;box-shadow:0 0 0 3px #3b82f61a}.provider-select:disabled{opacity:.7;cursor:not-allowed}.provider-hint{font-size:.82rem;color:#92400e;background-color:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:8px 10px;line-height:1.4}.chat-textarea{width:100%;min-height:100px;padding:12px;border:1px solid #d1d5db;border-radius:8px;resize:vertical;font-family:inherit;font-size:.95rem;line-height:1.5;outline:none;transition:all .2s ease;box-sizing:border-box;background-color:#f9fafb}.chat-textarea:focus{border-color:#3b82f6;background-color:#fff;box-shadow:0 0 0 3px #3b82f61a}.chat-textarea:disabled{opacity:.7;cursor:not-allowed}.file-badge{display:flex;align-items:center;justify-content:space-between;background-color:#eff6ff;border:1px solid #bfdbfe;padding:8px 12px;border-radius:6px;font-size:.85rem;color:#1e40af}.file-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:85%}.remove-file-btn{background:none;border:none;color:#1e3a8a;cursor:pointer;font-weight:700;padding:0 4px}.remove-file-btn:hover{color:#dc2626}.action-row{display:flex;justify-content:space-between;align-items:center;margin-top:4px}.icon-btn{background:none;border:1px solid transparent;color:#4b5563;font-size:.9rem;cursor:pointer;padding:8px 12px;border-radius:6px;transition:all .2s;display:flex;align-items:center;gap:4px}.icon-btn:hover:not(:disabled){background-color:#f3f4f6;color:#111827}.submit-btn{background-color:#3b82f6;color:#fff;border:none;padding:10px 20px;border-radius:6px;cursor:pointer;font-weight:500;font-size:.95rem;transition:all .2s ease;box-shadow:0 2px 4px #3b82f633}.submit-btn:hover:not(:disabled){background-color:#2563eb;transform:translateY(-1px);box-shadow:0 4px 6px #3b82f64d}.submit-btn:disabled{background-color:#93c5fd;cursor:not-allowed;box-shadow:none;transform:none}.error-toast{background-color:#fef2f2;color:#b91c1c;border:1px solid #fecaca;padding:12px;border-radius:6px;font-size:.85rem;text-align:center;line-height:1.4}.chat-panel-content{flex:1;background-color:#f9fafb;padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:16px;scroll-behavior:smooth;position:relative;container-type:size}.empty-chat-tip{margin:auto;color:#9ca3af;font-size:.9rem;text-align:center}.message-row{display:flex;width:100%;align-items:flex-start}.user-row{justify-content:flex-end}.ai-row{justify-content:flex-start}.message-bubble{max-width:85%;padding:10px 14px;border-radius:12px;font-size:.9rem;line-height:1.5;cursor:pointer;transition:all .2s ease;box-shadow:0 1px 2px #0000000d;position:relative}.message-bubble:hover{filter:brightness(.95)}.user-bubble{background-color:#3b82f6;color:#fff;border-bottom-right-radius:2px}.ai-bubble{background-color:#fff;color:#374151;border:1px solid #e5e7eb;border-bottom-left-radius:2px;font-family:monospace}.collapsed .message-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.expanded .message-text{white-space:pre-wrap;word-break:break-all;max-width:100%;max-height:calc(80cqh - 28px);overflow-y:auto;padding-right:6px}.message-bubble.expanded{width:80cqw;max-width:80cqw;max-height:80cqh;box-shadow:0 16px 40px #0f172a2e}.user-row .message-bubble.expanded{margin-left:auto}.ai-row .message-bubble.expanded{margin-right:auto}.message-text::-webkit-scrollbar{width:8px}.message-text::-webkit-scrollbar-track{background:transparent}.message-text::-webkit-scrollbar-thumb{background:rgba(148,163,184,.8);border-radius:999px}.message-attachment{font-size:.8rem;font-weight:700;margin-bottom:4px;border-bottom:1px dashed rgba(255,255,255,.4);padding-bottom:4px}.loading-bubble{color:#9ca3af;font-weight:700;letter-spacing:2px}@keyframes blink{0%{opacity:.2}20%{opacity:1}to{opacity:.2}}.loading-bubble .dot{animation-name:blink;animation-duration:1.4s;animation-iteration-count:infinite;animation-fill-mode:both}.loading-bubble .dot:nth-child(2){animation-delay:.2s}.loading-bubble .dot:nth-child(3){animation-delay:.4s}body,#root{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;height:100vh;width:100vw;overflow:hidden}.app-container{display:flex;height:100vh;width:100%}.diagram-container{flex:7;border-right:2px solid #e0e0e0;display:flex;flex-direction:column}.diagram-container iframe{width:100%;height:100%;border:none}.chat-panel-container{flex:3;display:flex;flex-direction:column;padding:20px;background-color:#f7f7f7;overflow-y:auto}.chat-panel-container h3{margin-top:0;color:#333;text-align:center}.input-group{margin-bottom:15px}.input-group label{display:block;margin-bottom:5px;font-weight:700;color:#555}.input-group textarea{width:100%;min-height:150px;padding:10px;border-radius:4px;border:1px solid #ccc;box-sizing:border-box;resize:vertical}.file-input-wrapper{position:relative;overflow:hidden;display:inline-block;width:100%;border:1px solid #ccc;background-color:#fff;border-radius:4px;padding:8px 12px;cursor:pointer;text-align:center}.file-input-wrapper input[type=file]{position:absolute;left:0;top:0;opacity:0;width:100%;height:100%;cursor:pointer}.file-name{margin-top:10px;font-style:italic;color:#666}.action-button{width:100%;padding:12px 15px;background-color:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:16px;font-weight:700;transition:background-color .3s}.action-button:hover{background-color:#0056b3}.action-button:disabled{background-color:#ccc;cursor:not-allowed}.error-message{color:#d9534f;background-color:#f2dede;border:1px solid #ebccd1;padding:10px;border-radius:4px;margin-top:15px}