body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
  color: #333;
}
header {
  background: #222;
  color: #fff;
  padding: 1.5rem 2rem;
  text-align: center;
}
nav a {
  color: #fff;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: bold;
}
nav a:hover {
  text-decoration: underline;
}
h1, h2 { margin: 0.5rem 0; }
.container { padding: 2rem; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 15px; }
.gallery img { width: 100%; height: auto; border-radius: 5px; object-fit: cover; }
footer { text-align: center; padding: 1.5rem; background: #222; color: #fff; margin-top: 2rem; }
button { padding: 0.5rem 1rem; background: #222; color: #fff; border: none; border-radius: 3px; cursor: pointer; }
button:hover { background: #555; }