body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

header {
  background: linear-gradient(135deg, #1e3a8a, #4f46e5);
  padding: 20px;
  text-align: center;
}

nav {
  background: #020617;
  padding: 10px;
  text-align: center;
}

nav a {
  color: #93c5fd;
  margin: 0 10px;
  text-decoration: none;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 40px 20px;
}

h1, h2 {
  color: #60a5fa;
}

.card {
  background: #020617;
  padding: 20px;
  margin: 20px 0;
  border-radius: 10px;
}