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

.header {
    background: #003366;
    color: white;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header .logo {
    font-size: 22px;
    font-weight: bold;
}

.header .nav a {
    color: white;
    margin-left: 20px;
    text-decoration: none;
}

.header .nav a:hover {
    text-decoration: underline;
}

.content {
    padding: 20px;
}

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

table th {
    background: #003366;
    color: white;
}

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

button {
    background: #003366;
    color: white;
    padding: 8px 15px;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #0055aa;
}

input, select {
    padding: 6px;
    width: 250px;
}