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

header {
  background: #004080;
  color: white;
  padding: 10px;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
}

nav li {
  cursor: pointer;
  padding: 5px 10px;
  background: #0066cc;
  border-radius: 4px;
}

nav li:hover {
  background: #003366;
}

#content {
  padding: 20px;
  background: white;
  margin: 20px;
  border-radius: 8px;
}

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

th, td {
  border: 1px solid #ddd;
  padding: 8px;
}

th {
  background: #004080;
  color: white;
}