:root{--color-primary:#2196f3;--color-primary-light:#2196f31f;--color-primary-dark:#1976d2;--color-secondary:#6c757d;--color-accent-secondary:#f4ec10;--color-success:#28a745;--color-danger:#e53e3e;--color-warning:#ffc107;--color-info:#3182ce;--bg-primary:#fff;--bg-secondary:#f8f9fa;--bg-tertiary:#fbfdff;--bg-overlay:#0000000d;--bg-gradient:linear-gradient(135deg,#667eea,#764ba2);--bg-radial-gradient:radial-gradient(circle at 10% 0%,#00000008 0%,#0000 90%),radial-gradient(circle at 85% 15%,#2196f333 0%,#0000 30%),radial-gradient(circle at 65% 70%,#f4ec1033 0%,#0000 40%);--text-primary:#333;--text-secondary:#666;--text-muted:#6c757d;--text-light:#999;--text-white:#fff;--border-color:#e0e6ed;--border-light:#f0f4f8;--border-dark:#dee2e6;--shadow-sm:0 2px 4px #0000000d;--shadow-md:0 2px 10px #0000001a;--shadow-lg:0 4px 20px #0000001a;--shadow-xl:0 8px 30px #00000026;--radius-sm:6px;--radius-md:12px;--radius-lg:15px;--radius-xl:20px;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:48px;--text-xs:12px;--text-sm:14px;--text-base:16px;--text-lg:18px;--text-xl:20px;--text-2xl:24px;--text-3xl:28px;--font-normal:400;--font-medium:500;--font-semibold:600;--font-bold:700;--transition-fast:0.15s ease;--transition-normal:0.2s ease;--transition-slow:0.3s ease;--bp-sm:480px;--bp-md:768px;--bp-lg:1024px;--bp-xl:1200px}*,:after,:before{box-sizing:border-box}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#fbfdff;background-color:var(--bg-tertiary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;font-size:16px;font-size:var(--text-base);line-height:1.5;padding:0}body,h1,h2,h3,h4,h5,h6{color:#333;color:var(--text-primary);margin:0}h1,h2,h3,h4,h5,h6{font-weight:600;font-weight:var(--font-semibold);line-height:1.2}h1{font-size:28px;font-size:var(--text-3xl)}h2{font-size:24px;font-size:var(--text-2xl)}h3{font-size:20px;font-size:var(--text-xl)}h4{font-size:18px;font-size:var(--text-lg)}h5{font-size:16px;font-size:var(--text-base)}h6{font-size:14px;font-size:var(--text-sm)}p{color:#666;color:var(--text-secondary);margin:0}code{background-color:#f8f9fa;background-color:var(--bg-secondary);border-radius:6px;border-radius:var(--radius-sm);font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace;font-size:.9em;padding:2px 4px}.flex{display:flex}.flex-col{flex-direction:column}.flex-row{flex-direction:row}.items-center{align-items:center}.items-start{align-items:flex-start}.items-end{align-items:flex-end}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.justify-start{justify-content:flex-start}.justify-end{justify-content:flex-end}.flex-1{flex:1 1}.flex-wrap{flex-wrap:wrap}.grid{display:grid}.grid-cols-1{grid-template-columns:repeat(1,minmax(0,1fr))}.grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.block{display:block}.inline-block{display:inline-block}.hidden{display:none}.gap-xs{gap:4px;gap:var(--space-xs)}.gap-sm{gap:8px;gap:var(--space-sm)}.gap-md{gap:16px;gap:var(--space-md)}.gap-lg{gap:24px;gap:var(--space-lg)}.gap-xl{gap:32px;gap:var(--space-xl)}.p-xs{padding:4px;padding:var(--space-xs)}.p-sm{padding:8px;padding:var(--space-sm)}.p-md{padding:16px;padding:var(--space-md)}.p-lg{padding:24px;padding:var(--space-lg)}.p-xl{padding:32px;padding:var(--space-xl)}.p-2xl{padding:48px;padding:var(--space-2xl)}.m-0{margin:0}.m-xs{margin:4px;margin:var(--space-xs)}.m-sm{margin:8px;margin:var(--space-sm)}.m-md{margin:16px;margin:var(--space-md)}.m-lg{margin:24px;margin:var(--space-lg)}.m-xl{margin:32px;margin:var(--space-xl)}.mb-xs{margin-bottom:4px;margin-bottom:var(--space-xs)}.mb-sm{margin-bottom:8px;margin-bottom:var(--space-sm)}.mb-md{margin-bottom:16px;margin-bottom:var(--space-md)}.mb-lg{margin-bottom:24px;margin-bottom:var(--space-lg)}.mb-xl{margin-bottom:32px;margin-bottom:var(--space-xl)}.mt-xs{margin-top:4px;margin-top:var(--space-xs)}.mt-sm{margin-top:8px;margin-top:var(--space-sm)}.mt-md{margin-top:16px;margin-top:var(--space-md)}.mt-lg{margin-top:24px;margin-top:var(--space-lg)}.mt-xl{margin-top:32px;margin-top:var(--space-xl)}.text-xs{font-size:12px;font-size:var(--text-xs)}.text-sm{font-size:14px;font-size:var(--text-sm)}.text-base{font-size:16px;font-size:var(--text-base)}.text-lg{font-size:18px;font-size:var(--text-lg)}.text-xl{font-size:20px;font-size:var(--text-xl)}.text-2xl{font-size:24px;font-size:var(--text-2xl)}.text-3xl{font-size:28px;font-size:var(--text-3xl)}.font-normal{font-weight:400;font-weight:var(--font-normal)}.font-medium{font-weight:500;font-weight:var(--font-medium)}.font-semibold{font-weight:600;font-weight:var(--font-semibold)}.font-bold{font-weight:700;font-weight:var(--font-bold)}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.text-primary{color:#333;color:var(--text-primary)}.text-secondary{color:#666;color:var(--text-secondary)}.text-muted{color:#6c757d;color:var(--text-muted)}.text-white{color:#fff;color:var(--text-white)}.text-blue{color:#2196f3;color:var(--color-primary)}.text-red{color:#e53e3e;color:var(--color-danger)}.text-green{color:#28a745;color:var(--color-success)}.text-accent{color:#f4ec10;color:var(--color-accent-secondary)}.bg-white{background-color:#fff;background-color:var(--bg-primary)}.bg-gray{background-color:#f8f9fa;background-color:var(--bg-secondary)}.bg-light{background-color:#fbfdff;background-color:var(--bg-tertiary)}.bg-primary{background-color:#2196f3;background-color:var(--color-primary)}.bg-gradient{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--bg-gradient)}.bg-radial{background:radial-gradient(circle at 10% 0,#00000008 0,#0000 90%),radial-gradient(circle at 85% 15%,#2196f333 0,#0000 30%),radial-gradient(circle at 65% 70%,#f4ec1033 0,#0000 40%);background:var(--bg-radial-gradient)}.bg-accent{background-color:#f4ec10;background-color:var(--color-accent-secondary)}.border{border:1px solid #e0e6ed;border:1px solid var(--border-color)}.border-light{border:1px solid #f0f4f8;border:1px solid var(--border-light)}.border-b{border-bottom:1px solid #e0e6ed;border-bottom:1px solid var(--border-color)}.border-t{border-top:1px solid #e0e6ed;border-top:1px solid var(--border-color)}.rounded-sm{border-radius:6px;border-radius:var(--radius-sm)}.rounded-md{border-radius:12px;border-radius:var(--radius-md)}.rounded-lg{border-radius:15px;border-radius:var(--radius-lg)}.rounded-xl{border-radius:20px;border-radius:var(--radius-xl)}.rounded-full{border-radius:50%}.shadow-sm{box-shadow:0 2px 4px #0000000d;box-shadow:var(--shadow-sm)}.shadow-md{box-shadow:0 2px 10px #0000001a;box-shadow:var(--shadow-md)}.shadow-lg{box-shadow:0 4px 20px #0000001a;box-shadow:var(--shadow-lg)}.shadow-xl{box-shadow:0 8px 30px #00000026;box-shadow:var(--shadow-xl)}.transition{transition:all .2s ease;transition:all var(--transition-normal)}.transition-fast{transition:all .15s ease;transition:all var(--transition-fast)}.transition-slow{transition:all .3s ease;transition:all var(--transition-slow)}.w-full{width:100%}.h-full{height:100%}.min-h-screen{min-height:100vh}.max-w-sm{max-width:24rem}.max-w-md{max-width:28rem}.max-w-lg{max-width:32rem}.max-w-xl{max-width:36rem}.max-w-2xl{max-width:42rem}.relative{position:relative}.absolute{position:absolute}.fixed{position:fixed}.sticky{position:sticky}.overflow-hidden{overflow:hidden}.overflow-auto{overflow:auto}.overflow-y-auto{overflow-y:auto}.card{background-color:#fff;background-color:var(--bg-primary);border:1px solid #e0e6ed;border:1px solid var(--border-color);border-radius:12px;border-radius:var(--radius-md);box-shadow:0 2px 10px #0000001a;box-shadow:var(--shadow-md);padding:24px;padding:var(--space-lg)}.card-header{border-bottom:2px solid #f0f4f8;border-bottom:2px solid var(--border-light);margin-bottom:24px;margin-bottom:var(--space-lg);padding-bottom:16px;padding-bottom:var(--space-md)}.card-body{padding:16px 0;padding:var(--space-md) 0}.card-footer{border-top:1px solid #f0f4f8;border-top:1px solid var(--border-light);margin-top:24px;margin-top:var(--space-lg);padding-top:16px;padding-top:var(--space-md)}.btn{align-items:center;border:none;border-radius:6px;border-radius:var(--radius-sm);cursor:pointer;display:inline-flex;font-size:16px;font-size:var(--text-base);font-weight:500;font-weight:var(--font-medium);gap:8px;gap:var(--space-sm);justify-content:center;outline:none;padding:8px 16px;padding:var(--space-sm) var(--space-md);text-decoration:none;transition:.2s ease;transition:var(--transition-normal)}.btn-primary{background-color:#2196f3;background-color:var(--color-primary);color:#fff;color:var(--text-white)}.btn-primary:hover{background-color:#1976d2;background-color:var(--color-primary-dark)}.btn-secondary{background-color:#f8f9fa;background-color:var(--bg-secondary);border:1px solid #e0e6ed;border:1px solid var(--border-color);color:#666;color:var(--text-secondary)}.btn-secondary:hover{background-color:#0000000d;background-color:var(--bg-overlay);color:#333;color:var(--text-primary)}.btn-sm{font-size:14px;font-size:var(--text-sm);padding:4px 8px;padding:var(--space-xs) var(--space-sm)}.btn-lg{font-size:18px;font-size:var(--text-lg);padding:16px 24px;padding:var(--space-md) var(--space-lg)}.form-group{margin:.35rem 0}.form-label{display:block;font-weight:500;font-weight:var(--font-medium);margin-bottom:4px;margin-bottom:var(--space-xs)}.form-input,.form-label{color:#333;color:var(--text-primary)}.form-input{background-color:#f8f9fa;background-color:var(--bg-secondary);border:1px solid #e0e6ed;border:1px solid var(--border-color);border-radius:6px;border-radius:var(--radius-sm);font-size:16px;font-size:var(--text-base);padding:10px 12px;transition:.2s ease;transition:var(--transition-normal);width:100%}.form-input:focus{border-color:#2196f3;border-color:var(--color-primary);box-shadow:0 0 0 3px #2196f31f;box-shadow:0 0 0 3px var(--color-primary-light);outline:none}.form-textarea{min-height:100px;resize:vertical}.nav-link{border:1px solid #e0e6ed;border:1px solid var(--border-color);border-radius:10px;color:#666;color:var(--text-secondary);font-size:16px;font-size:var(--text-base);font-weight:500;font-weight:var(--font-medium);padding:8px 16px;padding:var(--space-sm) var(--space-md);position:relative;text-decoration:none;transition:.2s ease;transition:var(--transition-normal)}.nav-link:hover{background-color:#0000000d;background-color:var(--bg-overlay);color:#333;color:var(--text-primary)}.nav-link.active{background-color:#2196f31f;background-color:var(--color-primary-light);color:#2196f3;color:var(--color-primary);font-weight:600;font-weight:var(--font-semibold)}.message-bubble{word-wrap:break-word;border-radius:15px;border-radius:var(--radius-lg);margin-bottom:16px;margin-bottom:var(--space-md);max-width:70%;padding:16px;padding:var(--space-md)}.message-user{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--bg-gradient);border-bottom-right-radius:6px;border-bottom-right-radius:var(--radius-sm);color:#fff;color:var(--text-white);margin-left:auto}.message-assistant{background-color:#fff;background-color:var(--bg-primary);border:1px solid #e0e6ed;border:1px solid var(--border-color);border-bottom-left-radius:6px;border-bottom-left-radius:var(--radius-sm);color:#333;color:var(--text-primary)}.alert{border:1px solid;border-radius:6px;border-radius:var(--radius-sm);margin-bottom:16px;margin-bottom:var(--space-md);padding:16px;padding:var(--space-md)}.alert-info{background-color:#3182ce1a;border-color:#3182ce;border-color:var(--color-info);color:#3182ce;color:var(--color-info)}.alert-success{background-color:#28a7451a;border-color:#28a745;border-color:var(--color-success);color:#28a745;color:var(--color-success)}.alert-danger{background-color:#e53e3e1a;border-color:#e53e3e;border-color:var(--color-danger);color:#e53e3e;color:var(--color-danger)}.loading-spinner{animation:spin 1s ease-in-out infinite;border:2px solid #f0f4f8;border-radius:50%;border-top-color:#2196f3;border:2px solid var(--border-light);border-top-color:var(--color-primary);display:inline-block;height:20px;width:20px}@keyframes spin{to{transform:rotate(1turn)}}.loading-dots:after{animation:dots 1.5s infinite;content:""}@keyframes dots{0%,20%{content:""}40%{content:"."}60%{content:".."}90%,to{content:"..."}}@media (max-width:768px){:root{--text-base:14px;--text-lg:16px;--text-xl:18px;--text-2xl:20px;--text-3xl:24px}.grid-cols-2,.grid-cols-3{grid-template-columns:1fr}.grid-cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}.message-bubble{max-width:85%}.nav-link{font-size:14px;font-size:var(--text-sm);padding:4px 8px;padding:var(--space-xs) var(--space-sm)}}@media (max-width:480px){.grid-cols-4{grid-template-columns:1fr}.message-bubble{max-width:95%}.nav-link{font-size:12px;font-size:var(--text-xs);padding:4px 8px;padding:var(--space-xs) var(--space-sm)}}:root{color-scheme:light}.App{background-color:var(--bg-tertiary);display:flex;flex-direction:column;min-height:100vh}.App-header{background:var(--bg-primary);border-bottom:1px solid #0003;box-shadow:var(--shadow-sm);color:var(--text-primary);justify-content:space-between;padding:var(--space-lg) var(--space-lg)}.App-header,.header-left{align-items:center;display:flex}.header-left{flex-direction:row;font-size:1.5rem;gap:20px}.App-header h1{font-size:var(--text-2xl);font-weight:var(--font-semibold);margin:0;margin-bottom:var(--space-xs)}.App-header p{font-size:var(--text-base);margin:0;opacity:.9}.App-main{align-items:flex-start;display:flex;flex:1 1;justify-content:center;padding:var(--space-xl) var(--space-lg)}.main-content{gap:var(--space-lg);max-width:1400px;width:100%}.right-sidebar{align-items:flex-start;display:flex;flex-direction:row;gap:var(--space-lg)}@media (max-width:1024px){.main-content{max-width:1000px}}@media (max-width:768px){.App-header{align-items:flex-start;flex-direction:column;gap:var(--space-md)}.App-header h1{font-size:var(--text-3xl)}.App-header p{font-size:var(--text-base)}.App-main{padding:var(--space-lg) var(--space-sm)}.main-content{align-items:center;flex-direction:column}.right-sidebar{align-items:center;width:100%}}@media (max-width:480px){.App-header{padding:var(--space-lg) var(--space-md)}.App-header h1{font-size:var(--text-2xl)}.App-header p{font-size:var(--text-sm)}}.notes-page{background-color:var(--bg-primary);border-radius:12px;box-shadow:0 4px 20px #00000014;display:flex;flex-direction:column;overflow:hidden;width:100%}.notes-page-header{align-items:center;box-shadow:0 2px 10px #0000001a;color:#fff;display:flex;justify-content:space-between;padding:20px 30px}.notes-page-header h1{font-size:28px;font-weight:600;margin:0}.new-note-btn{background:#fff;border:none;border-radius:6px;color:#667eea;cursor:pointer;font-size:16px;font-weight:500;padding:10px 20px;transition:all .2s ease}.new-note-btn:hover{box-shadow:0 4px 12px #ffffff4d;transform:translateY(-2px)}.notes-content{display:flex;flex:1 1;overflow:hidden}.notes-sidebar{background:#fff;border-right:1px solid #e0e0e0;overflow-y:auto;width:300px}.notes-list-full{padding:20px}.note-item{background:#f8f9fa;border:2px solid #0000;border-radius:8px;cursor:pointer;margin-bottom:12px;padding:15px;transition:all .2s ease}.note-item:hover{background:#f0f1f4;transform:translateX(4px)}.note-item.active{background:#fff;border-color:#667eea;box-shadow:0 2px 8px #667eea1a}.note-item h3{color:#333;font-size:16px;font-weight:600;margin:0 0 8px}.note-item p{color:#666;font-size:14px;line-height:1.4;margin:0 0 8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.note-item .note-date{color:#999;font-size:12px}.note-detail{background:#fff;border-radius:12px;box-shadow:0 2px 10px #00000014;display:flex;flex:1 1;flex-direction:column;margin:20px;overflow:hidden}.note-detail-header{align-items:center;border-bottom:1px solid #e0e0e0;display:flex;justify-content:space-between;padding:25px 30px}.note-detail-header h2{color:#333;font-size:24px;font-weight:600;margin:0}.note-title-input{border:2px solid #667eea;border-radius:6px;flex:1 1;font-size:24px;font-weight:600;margin-right:20px;outline:none;padding:8px 12px}.note-actions{display:flex;gap:10px}.note-actions button{border:none;border-radius:6px;cursor:pointer;font-size:14px;padding:8px 16px;transition:all .2s ease}.edit-btn{background:#667eea;color:#fff}.edit-btn:hover{background:#5a67d8}.delete-btn{background:#e53e3e;color:#fff}.delete-btn:hover{background:#c53030}.save-btn{background:#48bb78;color:#fff}.save-btn:hover{background:#38a169}.cancel-btn{background:#718096;color:#fff}.cancel-btn:hover{background:#4a5568}.note-detail-body{flex:1 1;overflow-y:auto;padding:30px}.note-content{color:#333;font-size:16px;line-height:1.8}.note-content p{margin:0 0 16px}.note-content-input{border:2px solid #e0e0e0;border-radius:8px;font-family:inherit;font-size:16px;height:100%;line-height:1.8;outline:none;padding:20px;resize:none;width:100%}.note-content-input:focus{border-color:#667eea}.note-detail-footer{background:#f8f9fa;border-top:1px solid #e0e0e0;color:#666;font-size:14px;padding:15px 30px}.no-note-selected{align-items:center;color:#999;display:flex;flex:1 1;font-size:18px;justify-content:center}.note-detail-body::-webkit-scrollbar,.notes-sidebar::-webkit-scrollbar{width:8px}.note-detail-body::-webkit-scrollbar-track,.notes-sidebar::-webkit-scrollbar-track{background:#f1f1f1}.note-detail-body::-webkit-scrollbar-thumb,.notes-sidebar::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.note-detail-body::-webkit-scrollbar-thumb:hover,.notes-sidebar::-webkit-scrollbar-thumb:hover{background:#555}@media (max-width:768px){.notes-content{flex-direction:column}.notes-sidebar{border-bottom:1px solid #e0e0e0;border-right:none;height:200px;width:100%}.note-detail{margin:10px}.notes-page-header{flex-wrap:wrap;gap:10px;padding:15px 20px}.notes-page-header h1{font-size:24px;text-align:center;width:100%}}.error-message{margin:1rem}.empty-notes{color:#666;padding:3rem 1rem}.empty-notes p{margin:.5rem 0}.empty-notes p:first-child{color:#333;font-size:1.2rem;font-weight:500}.chat-window{-ms-overflow-style:none;align-self:stretch;background-color:#fff;border:1px solid #e0e6ed;border-radius:12px;box-shadow:0 2px 10px #00000014;box-sizing:border-box;display:flex;flex:1 1;flex-direction:column;height:480px;margin:0 auto;overflow-y:scroll;padding:0 20px;scrollbar-gutter:stable both-edges;scrollbar-width:none;width:800px}.chat-header{background-color:#fff;border-bottom:2px solid #f0f0f0;color:#fff;padding-bottom:15px;padding-top:20px;position:sticky;text-align:left;top:0;z-index:2}.chat-header-row{align-items:center;display:flex;gap:12px;justify-content:space-between}.new-chat-button{background:#eaf4ff;border:1px solid #d7eaff;border-radius:10px;color:#2196f3;cursor:pointer;font-size:.95rem;font-weight:500;padding:.5rem .9rem;transition:all .15s ease-in-out}.new-chat-button:hover{box-shadow:0 2px 8px #2196f32e;transform:translateY(-1px)}.chat-header 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