*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f0f0f;--surface:#1a1a1a;--surface-2:#242424;--border:#2a2a2a;--text:#e8e8e8;--text-muted:#888;--accent:#f97316;--accent-hover:#fb923c;--user-bubble:#1e3a5f;--assistant-bubble:#1e1e1e}body{background:var(--bg);color:var(--text);height:100vh;font-family:Inter,Segoe UI,system-ui,-apple-system,sans-serif;overflow:hidden}#root{height:100vh}.app{flex-direction:column;max-width:800px;height:100vh;margin:0 auto;display:flex}.header{border-bottom:1px solid var(--border);background:var(--surface);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.header-left{align-items:center;gap:12px;display:flex}.avatar{background:linear-gradient(135deg, var(--accent), #ef4444);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:16px;font-weight:700;display:flex}.header h1{font-size:18px;font-weight:600}.subtitle{color:var(--text-muted);margin-top:2px;font-size:12px}.clear-btn{border:1px solid var(--border);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:8px;padding:6px 14px;font-size:13px;transition:all .2s}.clear-btn:hover{border-color:var(--accent);color:var(--accent)}.chat-area{flex-direction:column;flex:1;gap:16px;padding:20px;display:flex;overflow-y:auto}.chat-area::-webkit-scrollbar{width:6px}.chat-area::-webkit-scrollbar-track{background:0 0}.chat-area::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.empty-state{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;display:flex}.empty-avatar{background:linear-gradient(135deg, var(--accent), #ef4444);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;margin-bottom:8px;font-size:26px;font-weight:700;display:flex}.empty-state 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#ef4444);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;margin-top:4px;font-size:11px;font-weight:700;display:flex}.msg-bubble{word-wrap:break-word;border-radius:18px;padding:12px 16px;font-size:14px;line-height:1.5}.message.user .msg-bubble{white-space:pre-wrap;background:var(--user-bubble);border-bottom-right-radius:4px}.message.assistant .msg-bubble{background:var(--assistant-bubble);border:1px solid var(--border);border-bottom-left-radius:4px}.typing{align-items:center;gap:4px;padding:14px 20px;display:flex}.typing span{background:var(--text-muted);border-radius:50%;width:8px;height:8px;animation:1.4s infinite bounce}.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-8px)}}.input-area{border-top:1px solid var(--border);background:var(--surface);gap:10px;padding:16px 20px;display:flex}.input-area input{background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:12px;outline:none;flex:1;padding:12px 16px;font-size:14px;transition:border-color .2s}.input-area input:focus{border-color:var(--accent)}.input-area input::placeholder{color:var(--text-muted)}.input-area button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:12px;padding:12px 24px;font-size:14px;font-weight:600;transition:background .2s}.input-area button:hover:not(:disabled){background:var(--accent-hover)}.input-area button:disabled{opacity:.4;cursor:not-allowed}@media (width<=600px){.header{padding:12px 16px}.chat-area{padding:16px}.message{max-width:92%}.input-area{padding:12px 16px}.suggestions{flex-direction:column;align-items:stretch}}.message.assistant .msg-bubble>:first-child{margin-top:0}.message.assistant .msg-bubble>:last-child{margin-bottom:0}.message.assistant .msg-bubble h1,.message.assistant .msg-bubble h2,.message.assistant .msg-bubble h3,.message.assistant .msg-bubble h4{margin:14px 0 8px;font-weight:600;line-height:1.3}.message.assistant .msg-bubble h1{font-size:1.3em}.message.assistant .msg-bubble h2{font-size:1.15em}.message.assistant .msg-bubble h3{font-size:1.05em}.message.assistant .msg-bubble p{margin:8px 0}.message.assistant .msg-bubble ul,.message.assistant .msg-bubble ol{margin:8px 0;padding-left:22px}.message.assistant .msg-bubble li{margin:4px 0}.message.assistant .msg-bubble li::marker{color:var(--accent)}.message.assistant .msg-bubble code{color:var(--accent);background:#ffffff14;border-radius:4px;padding:2px 6px;font-family:Fira Code,Cascadia Code,Consolas,monospace;font-size:.88em}.message.assistant .msg-bubble pre{border:1px solid var(--border);background:#111;border-radius:10px;margin:10px 0;padding:14px 16px;overflow-x:auto}.message.assistant .msg-bubble pre code{color:var(--text);background:0 0;border-radius:0;padding:0;font-size:.85em;line-height:1.6}.message.assistant .msg-bubble blockquote{border-left:3px solid var(--accent);color:var(--text-muted);background:#ffffff08;border-radius:0 8px 8px 0;margin:10px 0;padding:4px 12px}.message.assistant .msg-bubble table{border-collapse:collapse;width:100%;margin:10px 0;font-size:.9em}.message.assistant .msg-bubble th,.message.assistant .msg-bubble td{border:1px solid var(--border);text-align:left;padding:8px 12px}.message.assistant .msg-bubble th{color:var(--accent);background:#ffffff0f;font-weight:600}.message.assistant .msg-bubble tr:hover{background:#ffffff08}.message.assistant .msg-bubble hr{border:none;border-top:1px solid var(--border);margin:12px 0}.message.assistant .msg-bubble strong{color:#fff;font-weight:600}.message.assistant .msg-bubble em{color:#ccc;font-style:italic}.message.assistant .msg-bubble a{color:var(--accent);text-decoration:none}.message.assistant .msg-bubble a:hover{text-decoration:underline}