body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}

header {
  background-color: #008080;
  color: white;
  padding: 1em 0;
  text-align: center;
}

nav {
  margin-top: 10px;
}

nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 20px;
}

h2 {
  color: #006666;
}

ul {
  list-style-type: square;
  padding-left: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

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

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

footer {
  background-color: #008080;
  color: white;
  text-align: center;
  padding: 10px 0;
  margin-top: 20px;
}