body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f5f5;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  padding: 20px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.btn {
  padding: 12px 25px;
  background: #111;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-size: 18px;
  display: inline-block;
  transition: 0.3s;
}

.btn:hover {
  background: #333;
}