body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background: #0b2545;
  color: #fff;
  padding: 20px 0;
}
header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1000px;
  margin: auto;
  padding: 0 20px;
}
nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 20px;
}
.hero {
  background: #e0ecf8;
  padding: 60px 20px;
  text-align: center;
}
section {
  padding: 60px 20px;
}
section.light {
  background: #f8f9fa;
}
section.dark {
  background: #dee9f7;
}
.container {
  max-width: 1000px;
  margin: auto;
}
footer {
  background: #0b2545;
  color: #fff;
  text-align: center;
  padding: 20px 0;
}