Increase Logo size (in Header)

I have seen 2 topics where the same issue was raised, but I can’t seem to solve mine.

I have:

1. Played around with the Custom css. 2 things happened, with the 1st css code the logo image didnt change. And with the other the logo size increased but the image was blurry.

Code 1:

.site-header .custom-logo {
max-height: 80px;
width: auto;
}

Code 2:

.custom-logo
{
width: 250px !important;
height: 100px !important;
}

2. Updated the code on the file: medzone-lite\inc\class-medzone-lite.php

array(
‘height’ => 35,
‘width’ => 130,
‘flex-width’ => true,
)

Replace it with this one:

array(
‘height’ => 35,
‘width’ => 130,
‘flex-width’ => true,
‘flex-height’ => true,
)

2. I have uploaded my logo in a bigger size (700×323)

3. Cleared my cache.

But still no avail.

Anyone knows how else to tackle this?

The page I need help with: [log in to see the link]