body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
}

header {
  background-color: #003366;
  padding: 20px;
  color: #fff;
}

nav ul {
  list-style-type: none;
  padding: 0;
  text-align: center;
}

nav ul li {
  display: inline;
  margin: 0 15px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

.hero {
  background: #005f7f;
  color: white;
  text-align: center;
  padding: 100px 0;
}

.hero h1 {
  font-size: 3em;
}

button {
  background-color: #e14d2a;
  border: none;
  padding: 15px 30px;
  color: white;
  cursor: pointer;
  font-size: 1.2em;
  border-radius: 5px;
  transition: background 0.3s;
}

button:hover {
  background-color: #ff6600;
}

footer {
  background: #003366;
  color: #fff;
  text-align: center;
  padding: 20px 0;
  margin-top: 40px;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2em;
  }
  nav ul li {
    display: block;
    margin: 10px 0;
  }
}