body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background: linear-gradient(to right, #8e44ad, #3498db);
  color: white;
  padding: 20px;
  text-align: center;
}
nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  background-color: #333;
}
nav ul li {
  margin: 0 10px;
}
nav ul li a {
  color: white;
  text-decoration: none;
  padding: 10px;
  display: block;
}
nav ul li a:hover {
  background-color: #555;
}
.logo {
  max-height: 100px;
}
main {
  padding: 20px;
}
img {
  max-width: 100%;
  height: auto;
  margin: 10px 0;
}
video {
  margin-top: 20px;
}