:root{--bg: #0f1117;--bg-card: #1a1d27;--bg-sidebar: #13151f;--bg-input: #1e2130;--bg-user: #1e3a5f;--bg-tool: #1e2a1e;--border: #2a2d3e;--text: #e2e4ed;--text-muted: #6b7280;--text-label: #9ca3af;--accent: #4f7ef7;--accent-hover: #6690ff;--danger: #ef4444;--success: #22c55e;--radius: 10px;--radius-sm: 6px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace}@media (prefers-color-scheme: light){:root:not([data-theme=dark]){--bg: #f4f5f7;--bg-card: #ffffff;--bg-sidebar: #eff0f3;--bg-input: #ffffff;--bg-user: #dbeafe;--bg-tool: #f0fdf4;--border: #d1d5db;--text: #111827;--text-muted: #6b7280;--text-label: #374151;--accent: #2563eb;--accent-hover: #1d4ed8}}:root[data-theme=dark]{--bg: #0f1117;--bg-card: #1a1d27;--bg-sidebar: #13151f;--bg-input: #1e2130;--bg-user: #1e3a5f;--bg-tool: #1e2a1e;--border: #2a2d3e;--text: #e2e4ed;--text-muted: #6b7280;--text-label: #9ca3af;--accent: #4f7ef7;--accent-hover: #6690ff}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:var(--font);background:var(--bg);color:var(--text);font-size:15px}.auth-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px}.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:40px 36px;width:100%;max-width:380px;display:flex;flex-direction:column;gap:8px}.auth-icon{font-size:36px;text-align:center}.auth-card h1{text-align:center;font-size:22px;font-weight:700}.auth-sub{text-align:center;color:var(--text-muted);font-size:14px;margin-bottom:12px}.auth-card form{display:flex;flex-direction:column;gap:8px;margin-top:4px}.auth-card label{font-size:13px;color:var(--text-label)}.auth-card input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 12px;color:var(--text);font-size:14px;width:100%;outline:none;transition:border-color .15s}.auth-card input:focus{border-color:var(--accent)}.auth-error{color:var(--danger);font-size:13px}.auth-card button{background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);padding:10px;font-size:15px;font-weight:600;cursor:pointer;margin-top:6px;transition:background .15s}.auth-card button:hover:not(:disabled){background:var(--accent-hover)}.auth-card button:disabled{opacity:.5;cursor:default}.chat-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:240px;min-width:240px;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 12px;gap:0;overflow-y:auto}.sidebar-top{flex:1;display:flex;flex-direction:column;gap:8px}.sidebar-bottom{display:flex;flex-direction:column;gap:6px;padding-top:12px}.sidebar-logo{font-weight:700;font-size:15px;padding:4px 0 10px;color:var(--text)}.sidebar-label{font-size:12px;color:var(--text-label);display:flex;align-items:center}.sidebar-divider{border-top:1px solid var(--border);margin:6px 0}.model-selector{display:flex;flex-direction:column;gap:4px}.model-selector select,.model-selector input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:7px 8px;color:var(--text);font-size:13px;width:100%;outline:none}.model-selector select:focus,.model-selector input:focus{border-color:var(--accent)}.system-input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px;color:var(--text);font-size:12px;width:100%;resize:vertical;outline:none;font-family:var(--font);line-height:1.4}.session-id{font-size:11px;color:var(--text-muted);word-break:break-all;margin-top:4px}.btn-secondary{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;color:var(--text);font-size:13px;cursor:pointer;text-align:left;transition:background .15s}.btn-secondary:hover:not(:disabled){background:var(--border)}.btn-secondary:disabled{opacity:.5;cursor:default}.btn-ghost{background:transparent;border:none;padding:6px 10px;color:var(--text-muted);font-size:13px;cursor:pointer;text-align:left;border-radius:var(--radius-sm);transition:color .15s}.btn-ghost:hover{color:var(--text)}.chat-main{flex:1;display:flex;flex-direction:column;overflow:hidden}.messages{flex:1;overflow-y:auto;padding:24px 0;display:flex;flex-direction:column;gap:16px}.messages-empty{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:14px;text-align:center;padding:0 24px}.message{display:flex;flex-direction:column;max-width:780px;width:100%;padding:0 24px}.message--user{align-self:flex-end;align-items:flex-end}.message--assistant{align-self:flex-start;align-items:flex-start}.message-role{font-size:11px;color:var(--text-muted);margin-bottom:4px;font-weight:600;letter-spacing:.04em;text-transform:uppercase}.message-body{display:flex;flex-direction:column;gap:8px;width:100%}.message-text{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;line-height:1.6;font-size:14px;white-space:pre-wrap;word-break:break-word}.message--user .message-text{background:var(--bg-user)}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.cursor{display:inline-block;width:2px;height:1em;background:var(--accent);margin-left:2px;vertical-align:text-bottom;animation:blink 1s step-start infinite}.tool-calls{display:flex;flex-direction:column;gap:6px}.tool-block{background:var(--bg-tool);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;overflow:hidden}.tool-header{display:flex;align-items:center;gap:8px;padding:8px 12px;background:transparent;border:none;color:var(--text);cursor:pointer;width:100%;text-align:left;font-size:13px}.tool-header:hover{background:#ffffff0a}.tool-icon{font-size:12px}.tool-toggle{margin-left:auto;color:var(--text-muted);font-size:10px}.tool-body{border-top:1px solid var(--border);padding:10px 12px;display:flex;flex-direction:column;gap:6px}.tool-section-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.tool-body pre{font-family:var(--font-mono);font-size:12px;white-space:pre-wrap;word-break:break-all;color:var(--text);background:var(--bg);border-radius:var(--radius-sm);padding:8px;max-height:240px;overflow-y:auto}.chat-input-bar{display:flex;align-items:flex-end;gap:8px;padding:12px 16px 16px;border-top:1px solid var(--border);background:var(--bg)}.chat-input{flex:1;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;color:var(--text);font-size:14px;font-family:var(--font);line-height:1.5;resize:none;outline:none;max-height:180px;overflow-y:auto;transition:border-color .15s}.chat-input:focus{border-color:var(--accent)}.btn-send,.btn-stop{border:none;border-radius:var(--radius-sm);width:40px;height:40px;font-size:18px;cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-weight:700;transition:background .15s}.btn-send{background:var(--accent);color:#fff}.btn-send:hover:not(:disabled){background:var(--accent-hover)}.btn-send:disabled{opacity:.4;cursor:default}.btn-stop{background:var(--danger);color:#fff;font-size:13px;width:auto;padding:0 14px}.btn-stop:hover{background:#dc2626}@media (max-width: 640px){.sidebar{display:none}.message{padding:0 12px;max-width:100%}.chat-input-bar{padding:8px}}