body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #ffffff;
  color: #222;
}

header {
  background-color: #001f3f;
  color: #ffffff;
  position: sticky;
  top: 0;
}

.container {
  width: 90%;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

nav a {
  color: #ffffff;
  margin-left: 20px;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

.section {
  padding: 70px 10%;
}

.section.light {
  background-color: #f4f6fa;
}

.hero {
  background-color: #001f3f;
  color: #ffffff;
  text-align: center;
}

footer {
  background-color: #001f3f;
  color: #ffffff;
  text-align: center;
  padding: 20px;
}