body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f8fafc;
  color: #1e293b;
}

header {
  background: #0f172a;
  padding: 15px;
  text-align: center;
}

header a {
  color: #f1f5f9;
  margin: 0 12px;
  text-decoration: none;
  font-weight: bold;
}

header a:hover {
  color: #38bdf8;
}

main {
  max-width: 800px;
  margin: 40px auto;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

h1 {
  color: #0f172a;
}

footer {
  background: #0f172a;
  color: #f1f5f9;
  text-align: center;
  padding: 12px;
  margin-top: 40px;
}