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.new-chat-btn:hover{background:var(--bg-hover);border-color:var(--border-light)}.sidebar-conversations{flex:1;overflow-y:auto;padding:4px 8px;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.sidebar-conversations::-webkit-scrollbar{width:4px}.sidebar-conversations::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.sidebar-section-label{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);padding:8px 8px 4px}.conv-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);font-size:.85rem;transition:background .12s;position:relative;min-height:36px}.conv-item:hover{background:var(--bg-hover);color:var(--text-primary)}.conv-item:hover .conv-delete-btn{opacity:1}.conv-item--active{background:var(--accent-light);color:var(--text-primary)}.conv-icon{flex-shrink:0;opacity:.5}.conv-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-delete-btn{flex-shrink:0;background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:3px;border-radius:4px;display:flex;align-items:center;opacity:0;transition:opacity .15s,background .15s}.conv-delete-btn:hover{background:var(--error-bg);color:var(--error)}.sidebar-footer{border-top:1px solid var(--border);padding:12px;flex-shrink:0;display:flex;flex-direction:column;gap:10px}.model-selector-label{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:5px}.model-option{display:flex;align-items:center;gap:8px;width:100%;padding:7px 10px;border-radius:var(--radius-sm);background:transparent;border:1px solid transparent;color:var(--text-secondary);font-size:.82rem;font-family:var(--font-sans);cursor:pointer;transition:background .12s,color .12s,border-color .12s;text-align:left}.model-option:hover{background:var(--bg-hover);color:var(--text-primary)}.model-option--active{background:var(--accent-light);border-color:#14b8a64d;color:var(--text-primary)}.model-dot{width:7px;height:7px;border-radius:50%;background:var(--success);flex-shrink:0}.model-dot--r1{background:var(--accent)}.model-tag{margin-left:auto;font-size:.65rem;font-weight:600;padding:1px 5px;border-radius:3px;background:var(--success-bg);color:var(--success);text-transform:uppercase;letter-spacing:.05em}.model-tag--r1{background:var(--accent-light);color:#2dd4bf}.user-section{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:var(--radius);background:var(--bg-tertiary);border:1px solid var(--border)}.user-avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:#fff;flex-shrink:0}.user-name{flex:1;font-size:.82rem;font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-logout-btn{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:3px;border-radius:4px;display:flex;align-items:center;transition:color .15s;flex-shrink:0}.user-logout-btn:hover{color:var(--error)}.theme-toggle-btn{display:flex;align-items:center;gap:8px;width:100%;padding:7px 10px;border-radius:var(--radius-sm);background:transparent;border:1px solid transparent;color:var(--text-secondary);font-size:.82rem;font-family:var(--font-sans);cursor:pointer;transition:background .12s,color .12s,border-color .12s;text-align:left}.theme-toggle-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border)}.theme-toggle-btn svg{flex-shrink:0;opacity:.8}.main{flex:1;display:flex;flex-direction:column;height:100vh;min-width:0;background:var(--bg-primary);overflow:hidden}.topbar{height:var(--topbar-height);display:flex;align-items:center;gap:10px;padding:0 16px;border-bottom:1px solid var(--border);flex-shrink:0;background:var(--bg-primary);z-index:10}.topbar-menu-btn{width:32px;height:32px;background:transparent;border:none;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:background .15s,color .15s}.topbar-menu-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.topbar-logo{font-size:1.1rem;font-weight:800;letter-spacing:-.03em;color:var(--text-primary)}.topbar-spacer{flex:1}.topbar-new-btn{display:flex;align-items:center;gap:6px;padding:6px 14px;background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-secondary);font-size:.82rem;font-weight:500;font-family:var(--font-sans);border-radius:var(--radius);cursor:pointer;transition:background .15s,color .15s}.topbar-new-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.messages{flex:1;overflow-y:auto;padding:24px 0;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.messages::-webkit-scrollbar{width:5px}.messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - var(--topbar-height) - 130px);padding:2rem;text-align:center}.welcome-logo{font-size:3.5rem;font-weight:800;letter-spacing:-.04em;color:var(--text-primary);margin-bottom:16px;opacity:.9}.welcome-heading{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:8px}.welcome-sub{font-size:.9rem;color:var(--text-muted);letter-spacing:.05em;margin-bottom:36px}.examples{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-width:560px;width:100%}@media (max-width: 500px){.examples{grid-template-columns:1fr}}.example-btn{display:flex;align-items:flex-start;gap:10px;padding:14px 16px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;text-align:left;color:var(--text-secondary);font-size:.85rem;font-family:var(--font-sans);line-height:1.4;transition:background .15s,border-color .15s,color .15s}.example-btn:hover{background:var(--bg-tertiary);border-color:var(--border-light);color:var(--text-primary)}.example-icon{font-size:1.1rem;flex-shrink:0;margin-top:1px;opacity:.8}.message{display:flex;gap:14px;padding:16px max(16px,calc((100% - 760px)/2));align-items:flex-start;animation:msgFadeIn .2s ease}@keyframes msgFadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.message-user{flex-direction:row-reverse}.message-user .message-body{align-items:flex-end}.message-user .message-meta{flex-direction:row-reverse}.message-user .message-body .message-content{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-lg) var(--radius-sm) var(--radius-lg) var(--radius-lg)}.message-assistant .message-body 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.12s}.action-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.action-btn.copied{color:var(--success)}.message-content{font-size:.925rem;line-height:1.75;color:var(--text-primary);padding:10px 14px;border-radius:var(--radius);min-width:0;word-break:break-word}.message-assistant .message-content{padding:0}.message-content .streaming-content{white-space:pre-wrap;word-break:break-word}.message-content p{margin:.5em 0}.message-content p:first-child{margin-top:0}.message-content p:last-child{margin-bottom:0}.message-content h1,.message-content h2,.message-content h3,.message-content h4{color:var(--text-primary);font-weight:600;margin:1.1em 0 .4em;line-height:1.3}.message-content h1{font-size:1.4rem}.message-content h2{font-size:1.2rem}.message-content h3{font-size:1.05rem}.message-content strong,.message-content b{color:var(--text-primary);font-weight:600}.message-content ul,.message-content ol{padding-left:1.5em;margin:.5em 0}.message-content li{margin:.25em 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0;font-size:.875rem}.message-content th,.message-content td{border:1px solid var(--border);padding:7px 12px;text-align:left}.message-content th{background:var(--bg-tertiary);font-weight:600}.message-content tr:nth-child(2n) td{background:#ffffff05}.message-content .katex{color:var(--text-primary);font-size:1.05em}.message-content .katex-display{margin:1rem 0;padding:1rem;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);overflow-x:auto}.typing-indicator{display:flex;align-items:center;gap:14px;padding:10px max(16px,calc((100% - 760px)/2))}.typing-dots{display:flex;align-items:center;gap:6px}.typing-dots span{width:7px;height:7px;border-radius:50%;background:var(--text-muted);animation:dotBounce 1.3s infinite ease-in-out}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}@keyframes 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summary::-webkit-details-marker{display:none}.reasoning-header{display:flex;align-items:center;gap:8px;font-size:.82rem;font-weight:500;color:var(--warn)}.reasoning-icon{font-size:1rem}.reasoning-live-indicator{display:flex;gap:3px;margin-left:4px}.reasoning-live-dot{width:5px;height:5px;border-radius:50%;background:var(--warn);animation:dotBounce 1.2s infinite ease-in-out}.reasoning-live-dot:nth-child(2){animation-delay:.15s}.reasoning-live-dot:nth-child(3){animation-delay:.3s}.reasoning-content{padding:12px 14px;background:#00000040;color:var(--text-secondary);font-size:.82rem;line-height:1.7;font-family:var(--font-mono);white-space:pre-wrap;word-break:break-word;max-height:360px;overflow-y:auto;border-top:1px solid var(--border)}.tool-calls{margin-top:10px;display:flex;flex-direction:column;gap:6px}details.tool-call{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-secondary);overflow:hidden}details.tool-call[open]{border-color:var(--border-light)}details.tool-call>summary{list-style:none;cursor:pointer;-webkit-user-select:none;user-select:none}details.tool-call>summary::-webkit-details-marker{display:none}.tool-call-header{display:flex;align-items:center;gap:10px;padding:9px 14px;transition:background .12s}.tool-call-header:hover{background:var(--bg-hover)}.tool-name{font-size:.82rem;font-weight:600;font-family:var(--font-mono);color:#2dd4bf}.tool-status{display:inline-flex;align-items:center;gap:5px;font-size:.75rem;padding:2px 9px;border-radius:99px;margin-left:auto}.tool-status.generating{background:#3b82f61a;color:#60a5fa;border:1px solid rgba(59,130,246,.2)}.tool-status.executing{background:#a855f71a;color:#c084fc;border:1px solid rgba(168,85,247,.2)}.tool-status .dot{width:5px;height:5px;border-radius:50%;background:currentColor;animation:dotBounce 1.3s infinite ease-in-out}.tool-status .dot:nth-child(2){animation-delay:.15s}.tool-status .dot:nth-child(3){animation-delay:.3s}.tool-status .status-text{font-weight:500;white-space:nowrap}.checkmark{color:var(--success);font-size:1em;margin-left:auto}.crossmark{color:var(--error);font-size:1em;margin-left:auto}.tool-call-content{padding:0 14px 12px;border-top:1px solid var(--border)}.tool-section{margin-top:10px}details.tool-section{background:transparent;border:none}details.tool-section summary{list-style:none;cursor:pointer;-webkit-user-select:none;user-select:none;display:inline-flex;align-items:center;gap:4px;margin-bottom:5px;transition:color .12s}details.tool-section summary::-webkit-details-marker{display:none}details.tool-section summary:before{content:"▶";font-size:.6em;transition:transform .15s;display:inline-block;color:var(--text-muted)}details.tool-section[open] summary:before{transform:rotate(90deg)}.tool-section-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted)}.tool-code{background:var(--bg-primary);border:1px solid var(--border);padding:10px 12px;border-radius:var(--radius-sm);font-size:.8rem;font-family:var(--font-mono);color:var(--text-secondary);white-space:pre;overflow-x:auto}.tool-output{background:var(--bg-primary);border:1px solid var(--border);padding:10px 12px;border-radius:var(--radius-sm);font-size:.82rem;color:var(--text-secondary);overflow-x:auto;line-height:1.6}.tool-output>div{font-family:var(--font-sans)}.tool-output pre,.tool-output code{font-family:var(--font-mono)}.tool-output img{max-width:100%;border-radius:var(--radius-sm);margin:8px 0;display:block;border:1px solid var(--border)}.tool-input-scroll{white-space:pre;overflow-x:auto;max-width:100%;word-break:normal}.input-wrapper{flex-shrink:0;padding:0 max(16px,calc((100% - 760px)/2)) 16px;background:var(--bg-primary);position:relative}.math-symbols-popup{position:absolute;bottom:calc(100% + 8px);left:max(16px,calc((100% - 760px)/2));right:max(16px,calc((100% - 760px)/2));z-index:200;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:0 -8px 32px #0006;display:flex;flex-direction:column;max-height:380px;overflow:hidden}.math-symbols-popup-header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--border);font-size:.875rem;font-weight:600;color:var(--text-primary);flex-shrink:0}.math-symbols-close-btn{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:3px;border-radius:4px;display:flex;transition:color .12s}.math-symbols-close-btn:hover{color:var(--text-primary)}.math-symbols{overflow-y:auto;padding:12px 14px;scrollbar-width:thin;flex:1}.symbol-tabs{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:12px}.symbol-tab{background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-secondary);padding:4px 10px;font-size:.78rem;font-family:var(--font-sans);border-radius:var(--radius-sm);cursor:pointer;transition:background .12s,color .12s}.symbol-tab:hover{background:var(--bg-hover);color:var(--text-primary)}.symbol-tab.active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:500}.symbol-content{padding:4px 0}.symbol-row{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:4px}.symbol-btn{background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-secondary);padding:5px 8px;min-width:36px;font-size:1rem;cursor:pointer;border-radius:var(--radius-sm);transition:background .1s,transform .1s;display:inline-flex;align-items:center;justify-content:center}.symbol-btn:hover{background:var(--bg-hover);color:var(--text-primary);transform:translateY(-1px)}.symbol-btn:active{transform:scale(.96)}.template-btn{font-size:.7rem;font-family:var(--font-mono);min-width:52px;color:#e2c78a;border-color:var(--border-light)}.input-box{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-xl);display:flex;align-items:flex-end;padding:10px 12px 10px 16px;gap:8px;transition:border-color .15s,box-shadow .15s}.input-box:focus-within{border-color:#14b8a680;box-shadow:0 0 0 3px var(--accent-glow)}.input-box textarea{flex:1;background:transparent;border:none;outline:none;color:var(--text-primary);font-family:var(--font-sans);font-size:.925rem;line-height:1.6;resize:none;min-height:24px;max-height:180px;overflow-y:auto;scrollbar-width:thin}.input-box textarea::placeholder{color:var(--text-muted)}.input-box textarea:disabled{opacity:.6}.input-actions{display:flex;align-items:center;gap:4px;flex-shrink:0}.action-icon-btn{width:32px;height:32px;background:transparent;border:1px solid transparent;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700;transition:background .12s,color .12s,border-color .12s}.action-icon-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border)}.action-icon-btn--active{background:var(--accent-light);color:#2dd4bf;border-color:#14b8a64d}.model-toggle-btn{height:32px;padding:0 10px;background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);font-size:.72rem;font-weight:700;font-family:var(--font-mono);letter-spacing:.04em;transition:background .12s,color .12s,border-color .12s;white-space:nowrap}.model-toggle-btn:hover:not(:disabled){background:var(--bg-hover);color:var(--text-primary)}.model-toggle-btn--r1{background:linear-gradient(135deg,#0a1f1e,#0d2624);color:#2dd4bf;border-color:#14b8a666}.model-toggle-btn--r1:hover:not(:disabled){background:linear-gradient(135deg,#0d2624,#0f2e2b);border-color:#14b8a699}.model-toggle-btn:disabled{opacity:.4;cursor:not-allowed}.send-btn{width:34px;height:34px;background:var(--accent);border:none;color:#fff;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s,transform .1s,box-shadow .15s;flex-shrink:0;box-shadow:0 2px 8px var(--accent-glow)}.send-btn:hover:not(:disabled){background:var(--accent-hover);box-shadow:0 4px 12px var(--accent-glow)}.send-btn:active:not(:disabled){transform:scale(.95)}.send-btn:disabled{background:var(--bg-hover);color:var(--text-muted);cursor:not-allowed;box-shadow:none}.stop-btn{width:34px;height:34px;background:#e53e3e;border:none;color:#fff;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s,transform .1s,box-shadow .15s;flex-shrink:0;box-shadow:0 2px 8px #e53e3e66}.stop-btn:hover{background:#c53030;box-shadow:0 4px 12px #e53e3e80}.stop-btn:active{transform:scale(.95)}.input-footer{text-align:center;font-size:.7rem;color:var(--text-muted);margin-top:6px;opacity:.7}.login-page{display:flex;height:100vh;background:var(--bg-primary);align-items:center;justify-content:center;padding:1.5rem}.login-card{width:100%;max-width:400px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-xl);padding:2.5rem 2rem;box-shadow:0 8px 40px #00000080}.login-brand{text-align:center;margin-bottom:2rem}.login-logo{font-size:3rem;font-weight:800;letter-spacing:-.04em;color:var(--text-primary);display:block;margin-bottom:6px}.login-tagline{font-size:.8rem;color:var(--text-muted);letter-spacing:.04em}.login-form{display:flex;flex-direction:column;gap:14px}.form-field{display:flex;flex-direction:column;gap:5px}.form-field label{font-size:.82rem;font-weight:500;color:var(--text-secondary)}.form-field input{padding:10px 14px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:.925rem;font-family:var(--font-sans);outline:none;transition:border-color .15s,box-shadow .15s}.form-field input:focus{border-color:#14b8a680;box-shadow:0 0 0 3px var(--accent-glow)}.form-field input::placeholder{color:var(--text-muted)}.login-mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.login-mode-btn{padding:9px 10px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-tertiary);color:var(--text-secondary);font-size:.82rem;font-family:var(--font-sans);cursor:pointer;transition:background .12s,color .12s,border-color .12s}.login-mode-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.login-mode-btn--active{background:var(--accent-light);color:var(--text-primary);border-color:#14b8a659}.login-error{background:var(--error-bg);border:1px solid rgba(239,68,68,.3);color:#fca5a5;padding:10px 14px;border-radius:var(--radius);font-size:.87rem;text-align:center}.login-submit-btn{padding:11px;background:var(--accent);border:none;border-radius:var(--radius);color:#fff;font-size:.9rem;font-weight:600;font-family:var(--font-sans);cursor:pointer;transition:background .15s,box-shadow .15s,transform .1s;margin-top:4px;box-shadow:0 2px 10px var(--accent-glow)}.login-submit-btn:hover:not(:disabled){background:var(--accent-hover);box-shadow:0 4px 16px var(--accent-glow)}.login-submit-btn:active:not(:disabled){transform:scale(.98)}.login-submit-btn:disabled{background:var(--bg-hover);color:var(--text-muted);cursor:not-allowed;box-shadow:none}.login-saying{margin-top:1.75rem;text-align:center;font-size:.75rem;color:var(--text-muted);font-style:italic;opacity:.7}*{scrollbar-width:thin;scrollbar-color:var(--border) transparent}*::-webkit-scrollbar{width:5px;height:5px}*::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}*::-webkit-scrollbar-thumb:hover{background:var(--border-light)}:root{font-family:Courier New,Consolas,Monaco,monospace;line-height:1.6;font-weight:400;color-scheme:light;color:#1a1a1a;background-color:#f5f5f5;font-synthesis:none;text-rendering:geometricPrecision;-webkit-font-smoothing:auto;-moz-osx-font-smoothing:auto}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background:var(--bg-primary, #f5f5f5)}#root{width:100%;height:100vh;background:var(--bg-primary, #f5f5f5)}