body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b0b0f;
  color: #fff;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #111;
}

.logo {
  height: 40px;
}

nav a {
  color: #aaa;
  margin-left: 1rem;
  text-decoration: none;
}

nav a:hover {
  color: #fff;
}

.hero {
  text-align: center;
  padding: 4rem 2rem;
}

.hero h1 {
  font-size: 3rem;
  color: #7df9ff;
}

.hero button {
  padding: 1rem 2rem;
  background: #7df9ff;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  padding: 2rem;
}

.card {
  background: #1a1a22;
  padding: 2rem;
  text-align: center;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #111;
  color: #666;
}