body {
  font-family: Tahoma, sans-serif;
  direction: rtl;
  background-color: #f5f5f5;
  margin: 0;
  padding: 0;
}
nav {
  background-color: #333;
  padding: 1em;
}
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 2em;
  padding: 0;
}
nav ul li a {
  color: white;
  text-decoration: none;
}
nav ul li a.active {
  text-decoration: underline;
}
main {
  padding: 2em;
}
.gallery {
  display: flex;
  gap: 1em;
  flex-wrap: wrap;
}
.gallery img {
  width: 200px;
  border-radius: 8px;
}