body {
  background-color: #ffffff;
  font-family: Arial, sans-serif;
  margin: 20px;
  color: #000000;
}

h1 {
  color: #003366;
}

nav {
  margin-bottom: 20px;
}

nav a {
  margin-right: 10px;
}

img {
  width: 400px;
  max-width: 100%;
  height: auto;
  border: 1px solid #000000;
}

table {
  border-collapse: collapse;
}

th, td {
  border: 1px solid #000000;
  padding: 6px;
  text-align: left;
  vertical-align: top;
}

th {
  background-color: #dddddd;
  text-align: center;
}

footer {
  margin-top: 30px;
  font-size: 12px;
  color: #555555;
}