html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: Arial, sans-serif;
  background-color: #ffffff;
  display: flex;
  flex-direction: column;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background-color: #132a4c;
  color: white;
}
header .logo {
  max-height: 400px;
  width: auto;
  margin-left: -60px;
}
header {
  max-height: 90px;
  overflow: hidden;
}
nav a {
  color: white;
  text-decoration: none;
  margin-left: 15px;
  font-weight: bold;
}
nav a:hover {
  text-decoration: underline;
}
main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px 20px;
}
footer {
  text-align: center;
  padding: 15px;
  background-color: #f5f5f5;
  font-size: 14px;
  color: #333;
}