body {
  margin: 0;
  padding: 0;
  background-color: #000;
  color: #ccc;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  text-align: center;
}

header {
  background-color: #000;
  border-bottom: 2px solid #39FF14;
  padding: 20px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

nav a {
  color: #39FF14;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  text-shadow: 0 0 10px #39FF14;
}

.main-content {
  padding: 60px 40px;
  text-align: center;
}

footer {
  text-align: center;
  padding: 20px;
  border-top: 2px solid #39FF14;
  color: #666;
  margin-top: 60px;
}