body{margin:0;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}.App{text-align:center}.App-header{background-color:#282c34;padding:20px;color:#fff}.App-header h1{margin:0}body{margin:0;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-color:#f5f5f5}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}input,textarea,button,select{margin:5px;padding:8px;border:1px solid #ddd;border-radius:4px}button{background-color:#007bff;color:#fff;cursor:pointer}button:hover{background-color:#0056b3}button:disabled{background-color:#6c757d;cursor:not-allowed}h2{color:#333;border-bottom:2px solid #007bff;padding-bottom:10px}