h1 { color: #0275d8; text-align: center;}
   
    .wallet-box {background:#fff; border:1px solid #ddd; border-radius:8px; max-width:420px; margin:auto; padding:28px;}
    
    .wallet-balance {font-size: 24px; color: #222; text-align: center; margin-bottom:15px;}
    
    .label { font-weight: bold; display:block; margin-top:24px;}
    
    input[type="number"] { width:100%; margin-top:8px; padding:7px 10px; border:1px solid #ccc; border-radius:4px;}
    
    button {  background:#0275d8; color:#fff; border:none; border-radius:25px; font-size:17px; padding:10px 0; width:100%; cursor:pointer;}
    
    .message { text-align:center; margin: 15px 0;}
    
    .success { color: #3c763d; background: #dff0d8; border-radius: 4px; padding: 8px; }
    
    .error { color: #d9534f; background: #f2dede; border-radius: 4px; padding: 8px; }