body {
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  margin: 0;
}

.header {
  background: #0a3d62;
  color: white;
  padding: 15px;
  text-align: center;
}

.header nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
  font-weight: bold;
}

.container {
  max-width: 420px;
  background: white;
  margin: 40px auto;
  padding: 20px;
  border-radius: 6px;
}

input, button {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
}

button {
  background: #0a3d62;
  color: white;
  border: none;
  cursor: pointer;
}

.footer {
  background: #222;
  color: #ccc;
  text-align: center;
  padding: 15px;
  margin-top: 40px;
}