Search function on website - change to two lines

[motogarage]

Hello- I am wanting to change how the search function looks when inputting information. It currently increases the size of the icon and it is placed directly over the text the customer is trying to input which makes it nearly impossible for customers to read what they are typing. Is there anyway to make the search icon and the input box separate lines and not have the search icon change size when information is being put into the search box? If needed my website is www.moto-garage.com