body {
    margin: 20px;
    font-family: Arial, sans-serif;
}
table {
    width: 100%;
}
th, td {
    padding: 8px;
    text-align: left;
}
button {
    margin: 5px;
}
.card {
    border: 1px solid #ddd;
    padding: 15px;
    margin: 10px 0;
    border-radius: 4px;
    background: #f9f9f9;
}