*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial, Helvetica, sans-serif;
}

body{
    background:#f4f4f4;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
}

.container{
    width:400px;
    background:white;
    padding:30px;
    border-radius:15px;
    box-shadow:0 10px 30px rgba(0,0,0,.15);
}

h1{
    text-align:center;
    margin-bottom:20px;
    color:#333;
}

.balance-box{
    background:#4CAF50;
    color:white;
    text-align:center;
    padding:20px;
    border-radius:10px;
    margin-bottom:25px;
}

.balance-box h3{
    font-size:32px;
    margin-top:10px;
}

form{
    display:flex;
    flex-direction:column;
    gap:15px;
    margin-bottom:25px;
}

input,
select{
    padding:12px;
    border:1px solid #ddd;
    border-radius:8px;
    font-size:16px;
}

button{
    padding:12px;
    background:#4CAF50;
    color:white;
    border:none;
    border-radius:8px;
    cursor:pointer;
    font-size:16px;
    transition:.3s;
}

button:hover{
    background:#388E3C;
}

ul{
    list-style:none;
}

li{
    display:flex;
    justify-content:space-between;
    align-items:center;
    background:#f8f8f8;
    padding:12px;
    margin-bottom:10px;
    border-left:5px solid #4CAF50;
    border-radius:8px;
}

.delete-btn{
    background:red;
    padding:6px 10px;
    border-radius:5px;
    color:white;
    cursor:pointer;
}

.delete-btn:hover{
    background:darkred;
}