* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  background-color: #121212;
  color: #fff;
}

header nav ul {
  display: flex;
  justify-content: space-around;
  list-style: none;
}

header nav ul li a {
  color: #fff;
  text-decoration: none;
  padding: 15px;
}

.hero {
  background-image: url('hero-image.jpg');
  background-size: cover;
  text-align: center;
  padding: 100px 20px;
}

button {
  padding: 15px 30px;
  background-color: #FFD700;
  border: none;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background-color: #f1c40f;
}

section {
  padding: 50px 20px;
}

footer {
  text-align: center;
  padding: 20px;
  background-color: #333;
}

@media (max-width: 768px) {
  header nav ul {
    flex-direction: column;
  }
}