.upload-container {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
}

.drop-area {
  border: 2px dashed #ccc;
  border-radius: 10px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.3s, border-color 0.3s;
}

.drop-area.dragover {
  background-color: #e0f7e9;
  border-color: #28a745;
}

.upload-icon {
  font-size: 2rem;
  margin-bottom: 10px;
  color: #555;
}

#preview-container {
  margin-top: 20px;
  text-align: center;
}