solid construction- I need to make the logo bigger

Hello, my client is very happy with the look and simplicity of the website we are creating with the free 'solid construction' theme. One request they have is for me to make the logo bigger. I cannot figure out a way to do this, nor do I see a place for custom code. I also tried to create a larger 'header image' with the logo (thinking I could just link the image to the home page url), but the header image space is not at the top of the page, it's lower. Can you please direct me on how to make the logo bigger? https://broadaxeconstruction.com/ my email is native415@gmail.com Aloha from Hawaii, Alex