/* Reset some default browser styles */
body, h1, h2, form, button {
  margin: 0;
  padding: 0;
}

/* Global styles */
body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  color: #333333;
  line-height: 1.5;
}

header {
  background-color: #333333;
  padding: 20px;
  color: white;
}

h1 {
  font-size: 24px;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
}

#upload-section,
#wallpaper-gallery {
  margin-bottom: 30px;
}

h2 {
  font-size: 20px;
  margin-bottom: 15px;
}

#thumbnails {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.thumbnail {
  display: block;
  width: 100%;
  border-radius: 5px;
}

/* Responsive styles */
@media (max-width: 600px) {
  h1 {
    font-size: 20px;
  }

  h2 {
    font-size: 18px;
  }
}