:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}body{background:linear-gradient(135deg,#667eea,#764ba2);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;margin:0;padding:0;color:#fff;min-height:100vh;display:flex;justify-content:center;align-items:center}.app-container{background:#1e1e2f;border-radius:16px;padding:2rem;max-width:600px;width:100%;box-shadow:0 8px 25px #0000004d}.title{text-align:center;font-size:2rem;margin-bottom:1.5rem;color:#f5f5f5}.chat-box{display:flex;flex-direction:column;gap:1rem}.messages{background:#2c2c3e;padding:1rem;border-radius:12px;min-height:120px;max-height:250px;overflow-y:auto;font-size:1rem}.bot-message{background:#3b3b5c;padding:.8rem;border-radius:8px;margin-bottom:.5rem;animation:fadeIn .4s ease-in-out}.input-area{display:flex;gap:.5rem}.input-field{flex:1;padding:.8rem;border:none;border-radius:8px;font-size:1rem;outline:none}.send-btn{padding:.8rem 1.2rem;border:none;border-radius:8px;background:#667eea;color:#fff;font-size:1rem;cursor:pointer;transition:background .3s ease}.send-btn:hover{background:#5a6fd6}.send-btn:disabled{background:#444;cursor:not-allowed}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}