html,body,#root{height:100%;margin:0}*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f0f0f;--surface:#1a1a1a;--border:#2a2a2a;--text:#e0e0e0;--text-dim:#888;--accent:#6366f1;--accent-hover:#818cf8;--user-msg:#6366f1;--assistant-msg:#252525;--system-msg:#1e3a1e}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.app{flex-direction:column;max-width:100%;height:100vh;display:flex}.header{background:var(--surface);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.header h1{font-size:18px;font-weight:600}.status-bar{align-items:center;gap:12px;font-size:12px;display:flex}.online{color:#22c55e}.offline{color:#ef4444}.uptime{color:var(--text-dim)}.chat-container{flex-direction:column;flex:1;display:flex;overflow:hidden}.messages{flex-direction:column;flex:1;gap:16px;padding:20px;display:flex;overflow-y:auto}.welcome{text-align:center;color:var(--text-dim);margin-top:40%}.welcome p:first-child{margin-bottom:8px;font-size:16px}.hint{font-size:13px}.hint code{background:var(--surface);color:var(--accent);border-radius:4px;padding:2px 6px}.message{max-width:85%;animation:.2s fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.user{align-self:flex-end}.user .message-content{background:var(--user-msg);color:#fff;border-radius:18px 18px 4px;padding:12px 16px}.assistant{align-self:flex-start}.assistant .message-content{background:var(--assistant-msg);white-space:pre-wrap;border-radius:18px 18px 18px 4px;padding:12px 16px}.system{align-self:flex-start}.system .message-content{background:var(--system-msg);color:#86efac;border-radius:8px;padding:8px 12px;font-family:monospace;font-size:13px}.message-time{color:var(--text-dim);margin-top:4px;padding:0 4px;font-size:10px}.loading{color:var(--text-dim);font-style:italic}.input-form{background:var(--surface);border-top:1px solid var(--border);gap:12px;padding:16px 20px;display:flex}.input-form input{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:24px;outline:none;flex:1;padding:12px 20px;font-size:16px}.input-form input:focus{border-color:var(--accent)}.input-form input::placeholder{color:var(--text-dim)}.input-form button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;width:48px;height:48px;font-size:20px;transition:background .2s}.input-form button:hover:not(:disabled){background:var(--accent-hover)}.input-form button:disabled{opacity:.5;cursor:not-allowed}@media (width<=480px){.header{padding:12px 16px}.header h1{font-size:16px}.messages{padding:16px}.message{max-width:90%}.input-form{padding:12px 16px}}