*{box-sizing:border-box}:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#fff;background-color:#0a0a0a;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-height:100vh}#root{min-height:100vh}.chat-container{display:flex;flex-direction:column;height:100vh;max-width:800px;margin:0 auto;background:#1a1a1a}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid #333}.chat-header h1{font-size:1.25rem;margin:0}.new-chat-btn{padding:.5rem 1rem;font-size:.875rem;background:#333;border:none;border-radius:6px;color:#fff;cursor:pointer}.new-chat-btn:hover{background:#444}.messages{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:1rem}.empty-state{display:flex;align-items:center;justify-content:center;height:100%;color:#666}.message{max-width:80%;padding:.75rem 1rem;border-radius:12px;line-height:1.5;white-space:pre-wrap}.message.user{align-self:flex-end;background:#2563eb;color:#fff}.message.assistant{align-self:flex-start;background:#333;color:#fff}.message-content.loading{color:#888;font-style:italic}.input-form{display:flex;gap:.75rem;padding:1rem 1.5rem;border-top:1px solid #333;background:#1a1a1a}.input-form input{flex:1;padding:.75rem 1rem;font-size:1rem;background:#333;border:1px solid #444;border-radius:8px;color:#fff;outline:none}.input-form input:focus{border-color:#2563eb}.input-form input::placeholder{color:#666}.input-form button{padding:.75rem 1.5rem;font-size:1rem;background:#2563eb;border:none;border-radius:8px;color:#fff;cursor:pointer}.input-form button:hover:not(:disabled){background:#1d4ed8}.input-form button:disabled{opacity:.5;cursor:not-allowed}