.arcade-gifs .sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 220px;
  background: #191919;
  border-right: 1px solid #333;
  padding: 30px 15px 15px 15px;
  z-index: 999;
  overflow-y: auto;
}

.arcade-gifs .sidebar ul { list-style: none; padding: 0; margin: 0; }
.arcade-gifs .sidebar li { margin-bottom: 10px; }
.arcade-gifs .sidebar a {
  text-decoration: none;
  font-size: 16px;
  transition: color 0.2s;
  padding: 3px 5px;
  border-radius: 5px;
  display: block;
}
.arcade-gifs .sidebar a.active,
.arcade-gifs .sidebar a:focus {
  background: #2a3a46;
  color: #fff;
  font-weight: bold;
}
.arcade-gifs .sidebar a:hover {
  background: #222;
  color: #fff;
}
.arcade-gifs .content {
  margin-left: 240px; /* espace pour le menu */
  padding: 35px 30px;
}
.arcade-gifs .group {
  margin-bottom: 45px;
}
.arcade-gifs .gif-list {
  margin: 10px 0 30px 0;
}
.arcade-gifs img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 20px;
  background: #000;
  max-width: 90%;
  /* Pour forcer nearest neighbor lors d'un zoom ou redimensionnement */
  image-rendering: pixelated;
  /* fallback pour d'anciens navigateurs */
  image-rendering: crisp-edges;
}
.arcade-gifs h2 {
  margin-top: 40px;
  padding-bottom: 7px;
  font-size: 28px;
  border-bottom: 1px solid #ccc;
}
.arcade-gifs h3 {
  margin-top: 30px;
  font-size: 22px;
  padding-bottom: 5px;
}

@media (max-width: 800px) {
  .arcade-gifs .sidebar {
    position: static;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #333;
    padding: 20px 10px;
    margin-bottom: 20px;
  }
  .arcade-gifs .content {
    margin-left: 0;
    padding: 20px 8px;
  }
}