* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, sans-serif;
  line-height: 1.6;
  color: #222;
  background: #f7f7f7;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 3rem 1rem 2rem;
  background: white;
  border-bottom: 1px solid #ddd;
}

main {
  flex: 1;
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

h2 {
  margin-bottom: 1rem;
  color: #333;
}

p {
  margin-bottom: 1.5rem;
}

.download-btn {
  display: inline-block;
  background: #007bff;
  color: white;
  text-decoration: none;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.download-btn:hover {
  background: #005fcc;
}

.gallery {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.gallery img {
  width: calc(50% - 0.5rem);
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

footer {
  text-align: center;
  padding: 1rem;
  background: white;
  border-top: 1px solid #ddd;
  font-size: 0.9rem;
  color: #555;
}