.header{position:sticky;top:0;z-index:100;background:transparent;border:0;box-shadow:none;isolation:isolate}.header::before{content:'';position:absolute;z-index:-1;top:0;bottom:0;left:50%;width:100vw;transform:translateX(-50%);background:var(--paper,#faf7f1);border-bottom:1px solid rgba(6,47,73,.08);box-shadow:0 7px 18px rgba(6,47,73,.04)}