body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background: #f4f4f4;
}
header {
  background: #1e90ff;
  color: white;
  padding: 20px;
  text-align: center;
}
nav {
  display: flex;
  justify-content: center;
  background: #333;
}
nav a {
  color: white;
  padding: 14px 20px;
  text-decoration: none;
  display: block;
}
nav a:hover {
  background: #575757;
}
section {
  padding: 20px;
  max-width: 1000px;
  margin: auto;
  background: white;
  margin-bottom: 20px;
}
footer {
  background: #1e90ff;
  color: white;
  text-align: center;
  padding: 10px;
}
iframe {
  width: 100%;
  height: 300px;
  border: 0;
}
.gallery img {
  max-width: 100%;
  height: auto;
  margin: 10px 0;
}
form input, form textarea {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
}
form button {
  background: #1e90ff;
  color: white;
  border: none;
  padding: 10px 20px;
  cursor: pointer;
}