body {
  font-family: Arial, sans-serif;
  margin: 0; padding: 0;
  background: #f6f6f6;
  color: #333;
}
header {
  background: #0b2447;
  color: white;
  padding: 1em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  height: 40px;
}
nav select {
  font-size: 1em;
  padding: 0.3em;
}
main {
  padding: 2em;
}
.hero, .mission, .contact {
  margin-bottom: 2em;
}
footer {
  text-align: center;
  background: #0b2447;
  color: white;
  padding: 1em 0;
  position: relative;
  bottom: 0;
  width: 100%;
}
@media (max-width: 600px) {
  main { padding: 1em; }
  .logo { height: 30px; }
}