ibody {
  font-family: Arial, sans-serif;
  background-color: #66ffff;
  margin: 0;
}

header {
  background-color: #008080;
  padding: 10px;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
}

nav ul li {
  margin-left: 10px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
}

.logo {
  color: #fff;
  font-weight: bold;
  font-size: 18px;
  text-decoration: none;
}

.header {
  text-align: center;
  color: #fff;
}

.center {
  text-align: center;
}

footer {
  background-color: #008080;
  padding: 10px;
  color: #fff;
  text-align: center;
}