LOGO not responsive

Hello, I am having a hard time with logos and site name in the mobile version.They don’t seem to be responsive and simply too big.They take half of the screen together with the grey background stripe. The website is www.buildingvr.eu Could you Please provide a code which would make them smaller on the mobile version?I prepared a special logo before with the name of the site already on it.It worked fine on the mobile version but in the desktop version was on the other hand too big.