.page_header{ padding: 0; position: fixed; top: 16px; width: 100%; z-index: 9;} .page_header nav{ box-shadow: 0px 0px 10px #ccc; padding: 0 15px; margin-bottom: 0;}
.page_header .page_index{ padding: 0;} .page_header .page_index .logo_img{ padding: 0;} .page_header .page_index .logo_img a{ height: 100%;} .page_header .page_index .logo_img img{ height: 40px; margin: 5px 0;} .page_header .page_index .page_title{ padding: 0;} .page_header .page_index .page_title h4{ margin: 0; line-height: 50px; text-align: center;} .page_header .page_index .page_btn{ height: 50px; background: url(https://static.igem.org/mediawiki/2018/a/a8/T--SSTi-SZGD--NavIcon.svg) no-repeat right center; background-size: 30px;}
@media only screen and (min-width: 768px) { .page_header .page_list{ margin-left: 40px;} }