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

header {
  background: #111;
  color: white;
  padding: 20px;
  text-align: center;
}

main {
  max-width: 1000px;
  margin: 40px auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
}

button {
  padding: 12px 20px;
  background: black;
  color: white;
  border: none;
  cursor: pointer;
  margin-top: 10px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.grid img {
  width: 100%;
  border-radius: 10px;
}