body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-color: #f0f0f0;
}

.upload-container {
  border: 2px dashed #999;
  border-radius: 10px;
  width: 300px;
  padding: 20px;
  text-align: center;
  background-color: #fff;
  transition: border-color 0.3s, background-color 0.3s;
}

.upload-container.dragover {
  border-color: #333;
  background-color: #e0e0e0;
}

input[type="file"] {
  display: none;
}

button {
  margin-top: 10px;
  padding: 10px 20px;
  cursor: pointer;
  border: none;
  border-radius: 5px;
  background-color: #007BFF;
  color: white;
  font-size: 16px;
}