.upload-button {
      padding: 20px 40px;
      font-size: 20px;
      font-weight: bold;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      margin: 20px 0;
      transition: all 0.3s ease;
      box-shadow: 0 4px 15px rgba(0,0,0,0.2);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    
    .upload-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0,0,0,0.3);
      background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
    }
    
    .upload-button:active {
      transform: translateY(0);
      box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    }
    
    .upload-button:focus {
      outline: 3px solid #667eea;
      outline-offset: 2px;
    }