body{font-family:Arial,sans-serif;background-color:#f4f4f4;display:flex;justify-content:center;padding:50px}.app-container{background-color:#fff;padding:30px;border-radius:8px;width:300px;box-shadow:0 0 10px #0000001a}.form{display:flex;flex-direction:column;gap:10px}input{padding:8px;border-radius:4px;border:1px solid #ccc}button{padding:10px;background-color:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer}button:hover{background-color:#0056b3}.toggle-btn{background:none;border:none;color:#007bff;cursor:pointer;padding:0}