body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background: #333;
  color: #fff;
  padding: 1rem;
  text-align: center;
}
nav a {
  margin: 0 1rem;
  color: #fff;
  text-decoration: none;
}
.hero {
  position: relative;
  text-align: center;
}
.hero img {
  width: 100%;
  height: auto;
}
.hero-text {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -30%);
  color: white;
  background-color: rgba(0,0,0,0.5);
  padding: 1rem;
}
main {
  padding: 2rem;
}
footer {
  background: #eee;
  text-align: center;
  padding: 1rem;
}