body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
    background-color: #fff;
    padding: 20px;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}

header {
    background: #333;
    color: #fff;
    padding: 20px 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
}

nav ul li {
    display: inline;
    margin-right: 20px;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}

main {
    padding: 20px 0;
    text-align: center;
}

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

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

.rewards-table th {
    background-color: #f4f4f4;
    color: #333;
}

.rewards-table tr:nth-child(even) {
    background-color: #f2f2f2;
}

.rewards-table tr:hover {
    background-color: #ddd;
}

.rewards-table a {
    color: #007bff;
    text-decoration: none;
}

.rewards-table a:hover {
    text-decoration: underline;
}