body {
  font-family: 'Cairo', sans-serif;
  margin: 0;
  background: #fdfdfd;
  color: #222;
}
header, footer {
  background: #f1f1f1;
  text-align: center;
  padding: 20px;
}
nav {
  background: #003d80;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
nav a {
  color: white;
  padding: 12px 20px;
  text-decoration: none;
}
nav a:hover {
  background: #002e61;
}
main {
  padding: 20px;
  max-width: 900px;
  margin: auto;
}
.section-box {
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
}
.section-box h3 {
  margin-top: 0;
  color: #0056b3;
}
img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}