body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f4f6f9;
  color: #333;
  line-height: 1.7;
  margin: 0;
  padding: 0;
}

header {
  background: linear-gradient(90deg, #0066cc, #0099ff);
  color: #fff;
  padding: 30px;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

header h1 {
  margin: 0;
  font-size: 28px;
}

nav {
  background: #eee;
  text-align: center;
  padding: 10px 0;
}

nav a {
  margin: 0 15px;
  color: #0066cc;
  font-weight: bold;
  text-decoration: none;
  transition: 0.3s;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 900px;
  background: #fff;
  margin: 30px auto;
  padding: 25px 30px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

h2 {
  color: #0066cc;
  margin-top: 25px;
}

a.btn-home {
  display: inline-block;
  margin-top: 20px;
  background: #0066cc;
  color: #fff;
  padding: 10px 20px;
  border-radius: 6px;
  text-decoration: none;
  transition: 0.3s;
}

a.btn-home:hover {
  background: #004999;
}

footer {
  text-align: center;
  background: #eee;
  padding: 15px;
  font-size: 14px;
  margin-top: 40px;
  color: #555;
}