body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

 
nav a {
  padding: 4px 8px;
  display: inline-block;
  transition: background 100ms ease-in-out;
}

nav a:hover, nav a:active {
    background: #ddd;
}

/** prefers-color-scheme */
@media (prefers-color-scheme: dark) {

  :root {
      background: #121212;
  }

  body {
    background: #121212;
    color: #e0e0e0;
  }
   
  nav a:hover, nav a:active {
    background: #333;
  }
  a:visited {
    color: #e0e0e0;
  
  }
}

.gallery {
  width: 100%;
  max-width: 1000px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-top: 16px;

}

.gallery  img {
  width: 100%;
 
  display: block;
}
img {
  border: 2px solid #fff;
}