* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 20px;
  font-family: Arial, sans-serif;
}

/* ===== GRID ===== */

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr); /* PC */
  gap: 14px;
  align-items: start;
}

/* Smartphone */
@media (max-width: 640px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* images complètes */
.gallery img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
}

.site-footer {
  margin-top: 40px;
  padding: 20px;
  text-align: center;
  background: #111;
  color: white;
  font-size: 14px;
}

.site-footer a {
  color: #ccc;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}