:root{--color-text: #1e2427;--color-text-secondary: #6b7280;--color-text-tertiary: #9ca3af;--color-bg: #ffffff;--color-bg-secondary: #f5f5f5;--color-bg-tertiary: #f9fafb;--color-border: #e5e7eb;--color-error: #dc2626;--color-error-bg: #fef2f2;--color-error-border: #fecaca;--color-success: #10b981;--color-btn-active-bg: #1e2427;--color-btn-active-text: #ffffff;--color-input-shadow: rgba(0, 0, 0, .04)}[data-theme=dark]{--color-text: #e4e4e7;--color-text-secondary: #a1a1aa;--color-text-tertiary: #71717a;--color-bg: #18181b;--color-bg-secondary: #27272a;--color-bg-tertiary: #1f1f23;--color-border: #3f3f46;--color-error: #f87171;--color-error-bg: #371717;--color-error-border: #7f1d1d;--color-success: #34d399;--color-btn-active-bg: #e4e4e7;--color-btn-active-text: #18181b;--color-input-shadow: rgba(0, 0, 0, .2)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,sans-serif;background:var(--color-bg);color:var(--color-text);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:2px}@keyframes thinking-fade{0%,to{opacity:.4}50%{opacity:1}}.thinking-indicator{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;color:var(--color-text-tertiary);animation:thinking-fade 2s ease-in-out infinite}.thinking-indicator svg{animation:thinking-fade 2s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}.spinner{display:inline-block;width:11px;height:11px;border:1.5px solid var(--color-border);border-top-color:var(--color-text-secondary);border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0}.assistant-content{color:var(--color-text)}.assistant-content p{margin-bottom:.75em}.assistant-content p:last-child{margin-bottom:0}.assistant-content strong{font-weight:600}.assistant-content em{font-style:italic}.assistant-content ul,.assistant-content ol{padding-left:1.25em;margin-bottom:.75em}.assistant-content li{margin-bottom:.2em}.assistant-content code{font-family:SF Mono,Fira Code,monospace;font-size:13px;background:var(--color-bg-secondary);padding:.1em .35em;border-radius:3px;color:var(--color-text)}.assistant-content pre{background:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:6px;padding:12px 14px;overflow-x:auto;margin-bottom:.75em}.assistant-content pre code{background:none;padding:0;font-size:13px}.assistant-content h1,.assistant-content h2,.assistant-content h3{font-weight:600;margin-bottom:.4em;margin-top:1em}.assistant-content h1:first-child,.assistant-content h2:first-child,.assistant-content h3:first-child{margin-top:0}.assistant-content table{border-collapse:collapse;width:100%;margin-bottom:.75em;font-size:14px}.assistant-content th,.assistant-content td{border:1px solid var(--color-border);padding:6px 10px;text-align:left}.assistant-content th{background:var(--color-bg-tertiary);font-weight:500}.assistant-content blockquote{border-left:3px solid var(--color-border);padding-left:12px;color:var(--color-text-secondary);margin-bottom:.75em}.copy-btn{background:none;border:none;cursor:pointer;padding:0;color:var(--color-text-tertiary);display:flex;align-items:center;gap:5px;font-size:12px;font-family:inherit;margin-top:8px}.copy-btn:hover{color:var(--color-text)}@media(max-width:768px){body{font-size:14px}}