.upload-btn{display:inline-block;padding:10px 20px;background-color:#007bff;color:#fff;border-radius:4px;cursor:pointer;font-size:14px;transition:background-color .2s}.upload-btn:hover{background-color:#0056b3}body{font-family:Arial,sans-serif;max-width:1200px;margin:20px auto;padding:20px}h1{color:#333}#spreadsheet,.buttons{margin:20px 0}button{padding:5px 10px;margin-right:10px;background-color:#af4c4f;color:#fff;border:none;border-radius:4px;cursor:pointer}button:hover{background-color:#45a049}#output{margin-top:20px;padding:10px;background-color:#f5f5f5;border-radius:4px;white-space:pre-wrap;font-family:monospace}td.jss_row{width:200px!important;min-width:200px!important;max-width:200px!important}colgroup col:first-child{width:200px!important}