body {
  font-family: Arial, sans-serif;
  background: #f5f8fb;
  color: #333;
  margin: 0;
  padding: 0;
}

header.banner {
  background-color: #0c3c78;
  color: white;
  padding: 20px;
  text-align: center;
}

main {
  max-width: 900px;
  margin: 30px auto;
  padding: 20px;
  background: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1, h2 {
  color: #0c3c78;
}

.call-btn {
  background-color: #0c3c78;
  color: white;
  padding: 12px 24px;
  border: none;
  border-radius: 5px;
  font-weight: bold;
  text-decoration: none;
  cursor: pointer;
  display: inline-block;
}

.call-btn:hover {
  background-color: #062a57;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 20px auto;
  border-radius: 8px;
}

footer {
  background-color: #0c3c78;
  color: white;
  text-align: center;
  padding: 20px;
  margin-top: 60px;
}

footer a {
  color: #fff;
  text-decoration: underline;
}