: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}}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;width:100%}body{background:linear-gradient(135deg,#667eea,#764ba2);background-attachment:fixed}.app{width:100%;max-width:900px;margin:0 auto;padding:30px 40px;min-height:100vh;display:flex;flex-direction:column}h1{text-align:center;color:#fff;margin:0 0 8px;font-size:2.5rem;font-weight:700;text-shadow:0 2px 10px rgba(0,0,0,.2)}.subtitle{text-align:center;color:#ffffffd9;font-size:14px;margin:0 0 24px}.chat-container{flex:1;background:#fff;border-radius:16px;padding:24px;min-height:0;overflow-y:auto;box-shadow:0 10px 40px #0003;margin-bottom:20px}.chat-container::-webkit-scrollbar{width:6px}.chat-container::-webkit-scrollbar-track{background:#f1f1f1;border-radius:3px}.chat-container::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.chat-container::-webkit-scrollbar-thumb:hover{background:#a1a1a1}.chat-container:empty:before{content:"Start a conversation with AI...";display:flex;justify-content:center;align-items:center;height:200px;color:#999;font-size:16px}.message{margin-bottom:16px;padding:14px 18px;border-radius:16px;line-height:1.6;animation:fadeIn .3s ease;max-width:85%}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;margin-left:auto;border-bottom-right-radius:4px;box-shadow:0 4px 15px #667eea66}.message.ai{background:#f0f2f5;color:#1a1a2e;margin-right:auto;border-bottom-left-radius:4px}.message.error{background:#fee2e2;color:#dc2626;margin-right:auto;border-bottom-left-radius:4px}.message.loading{background:#f0f2f5;color:#666;font-style:italic;margin-right:auto;border-bottom-left-radius:4px}.message .role{font-weight:600;margin-right:8px;font-size:12px;text-transform:uppercase;letter-spacing:.5px;opacity:.8}.message.user .role{color:#ffffffe6}.message .content{white-space:pre-wrap;word-break:break-word;display:block;margin-top:4px}.input-form{display:flex;gap:12px;background:#fff;padding:16px;border-radius:16px;box-shadow:0 10px 40px #0003;flex-shrink:0}.input-form input{flex:1;padding:16px 20px;font-size:16px;border:2px solid #e0e0e0;border-radius:12px;outline:none;transition:all .3s ease}.input-form input:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.input-form input:disabled{background:#f5f5f5}.input-form button{padding:16px 32px;font-size:16px;font-weight:600;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:12px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.input-form button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea80}.input-form button:active:not(:disabled){transform:translateY(0)}.input-form button:disabled{background:#ccc;box-shadow:none;cursor:not-allowed}@media(max-width:768px){.app{padding:20px 16px}h1{font-size:1.8rem}.message{max-width:90%}.input-form{padding:12px}.input-form input{padding:14px 16px}.input-form button{padding:14px 20px}}