.App{font-family:Arial,sans-serif;max-width:1200px;margin:0 auto;padding:20px}header{background-color:#4a90e2;color:#fff;padding:10px 20px;border-radius:5px;margin-bottom:20px}main{display:flex;flex-direction:column;gap:20px}section{background-color:#f5f5f5;padding:20px;border-radius:5px;box-shadow:0 2px 4px #0000001a}h1{color:#333}h2{color:#4a90e2;margin-top:0}button{background-color:#4a90e2;color:#fff;border:none;padding:10px 15px;border-radius:5px;margin-right:10px;margin-bottom:10px;cursor:pointer}button:hover{background-color:#357abf}