body {
  margin: 0;
  font-family: Arial;
  background: #f9fafb;
  color: #111827;
}

header {
  padding: 30px;
  text-align: center;
}

.hero {
  text-align: center;
  padding: 80px 20px;
}

button {
  background: #2563eb;
  color: white;
  border: none;
  padding: 14px 22px;
  border-radius: 10px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  padding: 40px;
}

.card {
  background: white;
  padding: 20px;
  border-radius: 12px;
}