.app{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.chat-container{width:100%;max-width:800px;height:600px;background:#fff;border-radius:12px;box-shadow:0 4px 6px #0000001a;display:flex;flex-direction:column;overflow:hidden}.chat-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px;text-align:center}.chat-header h1{font-size:24px;font-weight:600}.messages-container{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:12px}.welcome-message{text-align:center;color:#666;margin-top:100px}.welcome-message h2{font-size:28px;margin-bottom:10px}.message{display:flex;animation:fadeIn .3s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.message-content{max-width:70%;padding:12px 16px;border-radius:18px;word-wrap:break-word;line-height:1.5}.message.user .message-content{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.message.assistant .message-content{background:#f0f0f0;color:#333}.typing{display:flex;gap:4px;padding:16px!important}.typing span{width:8px;height:8px;background:#999;border-radius:50%;animation:bounce 1.4s infinite ease-in-out}.typing span:nth-child(1){animation-delay:-.32s}.typing span:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.input-form{display:flex;gap:10px;padding:20px;border-top:1px solid #e0e0e0;background:#fff}.input-form input{flex:1;padding:12px 16px;border:2px solid #e0e0e0;border-radius:24px;font-size:14px;outline:none;transition:border-color .3s}.input-form input:focus{border-color:#667eea}.input-form button{padding:12px 24px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:24px;font-size:14px;font-weight:600;cursor:pointer;transition:transform .2s,opacity .3s}.input-form button:hover:not(:disabled){transform:translateY(-2px)}.input-form button:disabled{opacity:.5;cursor:not-allowed}.messages-container::-webkit-scrollbar{width:6px}.messages-container::-webkit-scrollbar-track{background:#f1f1f1}.messages-container::-webkit-scrollbar-thumb{background:#888;border-radius:3px}.messages-container::-webkit-scrollbar-thumb:hover{background:#555}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f5f5f5}