body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f4f4f9;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
}

button {
    margin-left: 10px;
    padding: 5px 15px;
    border: none;
    background-color: #5cb85c;
    color: #fff;
    cursor: pointer;
    border-radius: 5px;
}

button:hover {
    background-color: #4cae4c;
}

table {
    margin-top: 20px;
    width: 100%;
    border-collapse: collapse;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}

table th {
    background-color: #5cb85c;
    color: white;
}