body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: white;
  color: black;
  transition: background 0.3s, color 0.3s;
}

body.dark {
  background-color: #121212;
  color: white;
}

header {
  background: #222;
  color: white;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav button {
  margin-left: 10px;
  padding: 8px;
  cursor: pointer;
}

.user {
  position: relative;
  display: inline-block;
}

.user:hover .dropdown {
  display: block;
}

.dropdown {
  display: none;
  position: absolute;
  background: #fff;
  color: black;
  min-width: 150px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.dropdown a {
  display: block;
  padding: 10px;
  color: black;
  text-decoration: none;
}

.dropdown a:hover {
  background-color: #ddd;
}

.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  padding: 20px;
}

.gallery img, .gallery video {
  width: 300px;
  max-height: 300px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

footer {
  text-align: center;
  padding: 20px;
  background: #222;
  color: white;
}