.my-header{position:relative;width:100%;transition:all .3s ease}.my-header.sticky{position:fixed;top:0;left:0;z-index:999;background:rgba(255,255,255,.9);box-shadow:0 2px 10px rgba(0,0,0,.1);backdrop-filter:blur(10px)}body.has-sticky{padding-top:80px}