body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b0b0b;
  color: #fff;
}
header {
  display: flex;
  justify-content: space-between;
  padding: 20px;
  background: #000;
}
nav a {
  color: #00ff88;
  margin-left: 15px;
  text-decoration: none;
}
.hero {
  text-align: center;
  padding: 80px 20px;
}
.btn {
  background: #00ff88;
  color: #000;
  padding: 12px 24px;
  text-decoration: none;
}
.products {
  display: flex;
  justify-content: center;
  gap: 20px;
  padding: 40px;
}
.card {
  background: #111;
  padding: 20px;
  text-align: center;
}
footer {
  text-align: center;
  padding: 20px;
  background: #000;
}