body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f7f7f7;
}

header {
    background: #333;
    color: white;
    padding: 15px;
}

nav a {
    color: #fff;
    margin-right: 15px;
    text-decoration: none;
}

main {
    padding: 20px;
}

.table {
    width: 100%;
    background: white;
    border-collapse: collapse;
}

.table th, .table td {
    border: 1px solid #ddd;
    padding: 10px;
}

.btn {
    display: inline-block;
    padding: 10px;
    background: #3498db;
    color: white;
    text-decoration: none;
    margin-bottom: 15px;
}
