body {
  font-family: sans-serif;
  margin: 20px;
  background: #f0f0f0;
  transition: 0.3s;
}

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

h1 {
  text-align: center;
}

button {
  padding: 10px;
  margin: 5px;
  cursor: pointer;
  border-radius: 8px;
}

.card {
  background: white;
  padding: 15px;
  margin: 10px 0;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: 0.3s;
}

.card:hover {
  transform: scale(1.02);
}

.dark .card {
  background: #1e1e1e;
}

img {
  width: 100%;
  border-radius: 10px;
}