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#0000001a;padding:30px;margin-top:20px}.error-banner{background:#fee;color:#c33;padding:12px 16px;border-radius:8px;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center;border:1px solid #fcc}.error-banner button{background:none;border:none;color:#c33;font-size:20px;cursor:pointer;padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center}.error-banner button:hover{background:#cc33331a;border-radius:4px}*{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:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}#root{max-width:800px;margin:0 auto}