body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background: #2d2d2d;
  color: white;
  padding: 10px;
  text-align: center;
}
.logo {
  width: 100px;
  height: auto;
}
nav {
  background: #f2f2f2;
  text-align: center;
  padding: 10px 0;
}
nav a {
  margin: 0 10px;
  text-decoration: none;
  color: #333;
}
main {
  padding: 20px;
}
footer {
  background: #2d2d2d;
  color: white;
  text-align: center;
  padding: 10px 0;
  position: fixed;
  bottom: 0;
  width: 100%;
}