body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: white;
  margin: 0;
  padding: 0;
  text-align: center;
}
header {
  background-color: rgba(0,0,0,0.7);
  padding: 10px;
}
nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 15px;
}
nav a {
  color: #00ffff;
  text-decoration: none;
}
section#hero {
  padding: 50px;
}
button {
  padding: 10px 20px;
  margin-top: 15px;
  background-color: #00ffff;
  color: #000;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
footer {
  background: rgba(0,0,0,0.6);
  padding: 20px;
  font-style: italic;
}