body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: white;
}

nav {
  display: flex;
  justify-content: space-between;
  padding: 20px 40px;
  background: #111827;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 20px;
}

.hero {
  text-align: center;
  padding: 120px 20px;
}

.hero h1 {
  font-size: 52px;
}

.hero p {
  font-size: 20px;
  max-width: 700px;
  margin: auto;
}

button {
  margin-top: 20px;
  padding: 14px 28px;
  border: none;
  background: #2563eb;
  color: white;
  border-radius: 10px;
  cursor: pointer;
}

.features {
  display: flex;
  gap: 20px;
  justify-content: center;
  padding: 60px 20px;
  flex-wrap: wrap;
}

.card {
  background: #1e293b;
  padding: 20px;
  width: 280px;
  border-radius: 12px;
}

.about {
  text-align: center;
  padding: 60px 20px;
}