body{
font-family: Arial;
background:#f4f4f4;
text-align:center;
}

input{
padding:10px;
width:200px;
}

button{
padding:10px;
margin-left:5px;
cursor:pointer;
}

li{
background:white;
margin:10px auto;
padding:10px;
width:250px;
display:flex;
justify-content:space-between;
border-radius:5px;
}