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

.container{
display:flex;
flex-wrap:wrap;
justify-content:center;
gap:20px;
margin-top:30px;
}

.box{
background:white;
border:1px solid #ccc;
padding:20px;
flex-grow:1;
flex-shrink:1;
flex-basis:200px;
max-width:250px;
}

button{
background:blue;
color:white;
border:none;
padding:10px;
cursor:pointer;
}