body {
  font-family: Arial, sans-serif;
  background: #f8f9fa;
  margin: 0;
  padding: 0;
}

.converter-container {
  max-width: 700px;
  margin: 50px auto;
  padding: 25px;
  background: white;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

h1 {
  margin-bottom: 10px;
  color: #333;
}

.upload-box {
  border: 2px dashed #ccc;
  border-radius: 10px;
  padding: 40px;
  margin: 20px 0;
  cursor: pointer;
  background: #fefefe;
  transition: border-color 0.3s ease;
}

.upload-box:hover {
  border-color: #007bff;
}

.upload-box p {
  margin: 0;
  color: #555;
  font-size: 16px;
}

#imageInput {
  display: none;
}

.preview-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 20px;
}

.preview-container img {
  width: 120px;
  height: 100px;
  object-fit: cover;
  border-radius: 8px;
  margin: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

button {
  padding: 12px 20px;
  border: none;
  background: #007bff;
  color: white;
  font-size: 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #0056b3;
}

button:disabled {
  background: #aaa;
  cursor: not-allowed;
}