Change Logo Size

I need to change the size of this logo so it fits without any background color around it. I’ve copied the CSS (I believe this is the correct CSS for the image) and I can’t get the image position to change.
.site .custom-logo {
position: absolute;
left: 2%;
height: 200px;
width: 200px;
z-index: -1 !important;
margin: 16px 0;
}

I removed the margin and left position, but it still won’t put the logo flush on the header. For example, I do NOT want ANY border around the top, bottom or left of the logo. Any help would be appreciated.

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