:root{--primary: #2563eb;--primary-hover: #1d4ed8;--success: #10b981;--error: #ef4444;--bg-main: #f9fafb;--bg-card: #ffffff;--text-primary: #111827;--text-secondary: #6b7280;--border: #e5e7eb}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--bg-main);color:var(--text-primary);line-height:1.6}#app{max-width:1200px;margin:0 auto;padding:2rem}header{background:var(--bg-card);padding:2rem;border-radius:12px;box-shadow:0 1px 3px #0000001a;margin-bottom:2rem;display:flex;justify-content:space-between;align-items:center}h1{font-size:1.5rem;font-weight:600}.status{display:flex;align-items:center;gap:.5rem;font-size:.875rem}.status-indicator{width:10px;height:10px;border-radius:50%;background:var(--text-secondary);animation:pulse 2s infinite}.status.connected .status-indicator{background:var(--success)}.status.error .status-indicator{background:var(--error)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.chat-container{background:var(--bg-card);border-radius:12px;box-shadow:0 1px 3px #0000001a;overflow:hidden;display:flex;flex-direction:column;height:600px}.messages{flex:1;padding:1.5rem;overflow-y:auto;display:flex;flex-direction:column;gap:1rem}.message{padding:1rem;border-radius:8px;max-width:80%;word-wrap:break-word}.message.user{background:var(--primary);color:#fff;align-self:flex-end;margin-left:auto}.message.assistant{background:var(--bg-main);color:var(--text-primary);align-self:flex-start}.message.error{background:#fee2e2;color:#991b1b;align-self:center;max-width:100%}.message .role{font-size:.75rem;font-weight:600;text-transform:uppercase;margin-bottom:.25rem;opacity:.8}.message .content{white-space:pre-wrap}.chat-input{padding:1.5rem;border-top:1px solid var(--border);display:flex;gap:1rem}.chat-input textarea{flex:1;padding:.75rem;border:1px solid var(--border);border-radius:8px;font-family:inherit;font-size:.875rem;resize:none;outline:none;transition:border-color .2s}.chat-input textarea:focus{border-color:var(--primary)}.chat-input button{padding:.75rem 2rem;background:var(--primary);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:background .2s}.chat-input button:hover{background:var(--primary-hover)}.chat-input button:disabled{background:var(--text-secondary);cursor:not-allowed}.loading{text-align:center;color:var(--text-secondary);font-size:.875rem;padding:1rem}