body{
margin:0;
font-family:Arial;
background:#f4f4f4;
}

.sidebar{
width:240px;
height:100vh;
background:#1e88e5;
position:fixed;
}

.sidebar h2{
color:white;
text-align:center;
padding:20px;
}

.sidebar a{
display:block;
padding:15px;
color:white;
text-decoration:none;
}

.sidebar a:hover{
background:#1565c0;
}

.content{
margin-left:250px;
padding:30px;
}

.wallet{
background:white;
padding:30px;
border-radius:10px;
box-shadow:0 0 10px gray;
width:350px;
}

button{
padding:12px 20px;
background:#28a745;
color:white;
border:none;
border-radius:5px;
cursor:pointer;
}