body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f8fc;
  color: #333;
}

header {
  background: #0b63ce;
  color: white;
  padding: 50px 20px;
  text-align: center;
}

nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  background: #ffffff;
  padding: 15px;
}

nav a {
  color: #0b63ce;
  text-decoration: none;
  font-weight: bold;
}

.card {
  max-width: 800px;
  margin: 40px auto;
  background: #ffffff;
  padding: 30px;
  border-radius: 10px;
}

button {
  margin-top: 20px;
  padding: 12px;
  width: 100%;
  background: #0b63ce;
  color: white;
  border: none;
  border-radius: 6px;
}