body {
    font-family: Arial;
    background: #ffe6f0;
    text-align: center;
}

form {
    background: white;
    padding: 20px;
    width: 400px;
    margin: auto;
    border-radius: 10px;
    text-align: center;
}

<style>

body{
font-family: Arial;
background:#f4f6f8;
text-align:center;
}

.container{
width:700px;
margin:auto;
background:white;
padding:30px;
margin-top:40px;
box-shadow:0px 0px 10px #ccc;
border-radius:8px;
}

h1{
color:#333;
}

textarea{
width:100%;
height:300px;
margin-top:20px;
font-family:monospace;
font-size:14px;
padding:10px;
}

button{
padding:10px 20px;
background:#007BFF;
color:white;
border:none;
border-radius:5px;
cursor:pointer;
}

button:hover{
background:#0056b3;
}

.copybtn{
background:green;
}

</style>