body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0a0a0a;
  color: white;
}

header {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(90deg, #111, #1b0033);
}

header h1 {
  font-size: 3rem;
  color: #00e5ff;
}

nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  background: #111;
  padding: 12px;
}

nav a {
  color: #00e5ff;
  text-decoration: none;
  margin: 8px 14px;
  font-weight: bold;
}

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

.card {
  background: #181818;
  border: 1px solid #00e5ff;
  border-radius: 10px;
  padding: 20px;
  margin: 10px 0;
}

.button {
  display: inline-block;
  margin: 10px 10px 0 0;
  padding: 12px 20px;
  background: #00e5ff;
  color: #000;
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
}

footer {
  text-align: center;
  padding: 20px;
  background: #111;
  margin-top: 40px;
}