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

.header {
    background-color: #333;
    color: white;
}

header {
    padding: 20px;
}

header h1 {
    margin: 0;
    float: left;
}

header nav {
    float: right;
    margin-top: 10px;
}

header nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

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

header nav ul li a {
    color: white;
    text-decoration: none;
}

.container {
    width: 90%;
    margin: auto;
    padding: 20px;
    background: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

h3 {
    margin-bottom: 20px;
}

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

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

th, td {
    padding: 10px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}