how to remove the responsiveness ?

hello, i want to remove the responsivness of the theme
i changed all the “max-width” to “width” and supressed all the part “Responsive Structure” from the css, but it’s not working the header is still the same.

Any way to help ? maybe i have to do something with other files? .js or others ?

Or do i have to put all width and heignt in px instead of % ?

here’s what i have in my header part on .css

/* =Header
———————————————– */
#branding {
background: url(“images/header-bg3.jpg”);
border-bottom: 1px solid #030b26;
}
.hgroup-wrap {
padding-top: 0px;
padding-bottom: 15px;
}
.hgroup-wrap a {
display: block;
}
.hgroup-wrap img {
margin-top: 16px;
margin-bottom: 5px;
background-image: url(../../../danseurs%20fantas/site%20web%20df/images/banniereBlogV3.jpg);
}
#site-logo {
float: left;
margin-top: 39px;
margin-bottom: 13px;
}
#site-title {
font: 42px ‘Gentium Basic’, serif;
line-height:50px;
}
#site-title a {
color: #FFF;
}
#site-title a img {
vertical-align: inherit;
}
#site-title a span, #site-title a:hover, #site-title a:focus, #site-title a:active {
color: #66D9F8;
}
#site-description {
font-size: 16px;
color: #888;
}
.hgroup-right {
float: right;
width: 100%;
}