.App{text-align:center;padding:20px}textarea{margin-top:10px;margin-bottom:10px;width:300px;height:150px}button{display:block;margin:20px auto;padding:10px 20px;font-size:16px}.app-description{max-width:600px;margin:0 20px;font-family:Arial,sans-serif}h1,h2{color:#333}p,ol,ul{text-align:left;line-height:1.6}ol{padding-left:20px}ul{padding-left:20px;list-style-type:disc}pre{background:#f4f4f4;padding:10px;border-radius:5px;white-space:pre-wrap}