Logo changes aspect ratio on smaller layouts

I purchased the pro version of the x2 template. The white-logo at the top-left changes its aspect ratio on smaller resolutions, like smart- phones. How to fix it, that the aspect ratio stays the same on every resolution? www.nectone.com/

Add this syntax to your css/custom.css

#header-responsive .logo img {
max-height: auto!important;
}

Hi, Thx for the quick reply. But this doesn´t fix it.

I fixed it by my own. The logo size must be set to auto itself in the code sniped. Setting a fixed size caused this error.