.col-md-4 {
    float: left;
    width: 33%
}

.entry-content .thumbnail-post {
    width: auto
}

.col-md-6 {
    width: 50%;
    float: left;
}

.col-md-8 {
    float: left;
    width: 66%
}

body #header.sticky-header {
    background: #efefef
}