Increasing the size of the logo can be done by simple custom CSS. Although providing any assistance for customized/extensive design or script coding is outside our item support, I can help you out with the CSS code because this is just a simple tweak. Kindly copy the CSS code below to your Custom CSS section (CROMA > Custom CSS/JS).
/*Increase the size of the logo*/
/*classic menu*/
.classic-menu > ul > li.logo {
overflow: initial;
max-width: calc(100% - 100px);
}
/*push menu*/
.logo-desktop{
max-width: calc(100% - 100px);
max-height: 500px;
}