.pa-header{position:relative;overflow:hidden;z-index:10;background-color:#fff0}.pa-header::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background-color:#0c3552;transform:translateY(-100%);transition:transform 0.5s ease;z-index:-1}.pa-fixed-header::before{transform:translateY(0%)}