.chat-message{display:flex;margin-bottom:12px}.chat-message.user{justify-content:flex-end}.chat-message.assistant{justify-content:flex-start}.bubble{max-width:80%;padding:10px 14px;border-radius:16px;font-size:14px;position:relative;animation:fadeIn .3s ease}.chat-message.user .bubble{background:#3b82f6;color:#fff;border-bottom-right-radius:0}.chat-message.assistant .bubble{background:#fff;color:#111827;border:1px solid #e5e7eb;border-bottom-left-radius:0}.timestamp{font-size:11px;display:block;margin-top:4px;opacity:.7}.chat-message.user .timestamp{color:#dbeafe}.chat-message.assistant .timestamp{color:#9ca3af}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}body{font-family:Inter,sans-serif}.app{min-height:100vh;background:linear-gradient(to bottom right,#eff6ff,#eef2ff);display:flex;justify-content:center;align-items:center;padding:16px}.chat-container{width:100%;max-width:800px;background:#fff;border:1px solid #e5e7eb;border-radius:16px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 8px 20px #00000014}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid #e5e7eb;background:#fff}.chat-header-left{display:flex;align-items:center;gap:12px}.chat-logo{background:#3b82f6;color:#fff;padding:8px;border-radius:8px}.chat-header h1{font-size:18px;font-weight:600;margin:0}.chat-header p{font-size:13px;color:#6b7280;margin:0}.chat-loading{color:#3b82f6;font-size:14px;display:flex;align-items:center;gap:6px}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.chat-messages{height:500px;overflow-y:auto;padding:20px;background:#f9fafb}.chat-error{display:flex;align-items:center;justify-content:space-between;background:#fee2e2;border:1px solid #fecaca;color:#b91c1c;padding:8px 12px;border-radius:8px;margin-bottom:12px}.chat-error button{border:none;background:none}.chat-typing{display:flex;gap:4px;color:#9ca3af;font-size:20px;margin:8px 0}.chat-typing span{animation:bounce 1s infinite}.chat-typing span:nth-child(2){animation-delay:.2s}.chat-typing span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:scale(.7)}40%{transform:scale(1)}}.chat-input-container{display:flex;gap:8px;border-top:1px solid #e5e7eb;padding:12px 20px;background:#fff}.chat-input-container p{color:#757575;font-size:14px}.chat-input{flex:1;padding:7px 14px;border-radius:8px;border:1px solid #d1d5db;font-size:14px}.chat-input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 2px #3b82f64d}.chat-send{background:#3b82f6;color:#fff;border:none;border-radius:8px;padding:12px 10px 8px;cursor:pointer;transition:background .2s}.chat-send:disabled{opacity:.5;cursor:not-allowed}.chat-send:hover:not(:disabled){background:#2563eb}