body {
  margin: 0;
  font-family: Arial, sans-serif;
}

nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: transparent;
  padding: 15px;
  transition: 0.3s;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
}

nav ul li {
  margin: 0 15px;
  cursor: pointer;
  color: black;
}

nav ul li:hover {
  color: blue;
}

.hero {
  height: 100vh;
  padding-top: 100px;
  text-align: center;
}