.header.scroll-header{background:color-mix(in srgb, var(--bg) 92%, transparent);-webkit-backdrop-filter:blur(20px);transition:transform .2s;position:sticky;top:0;transform:translateY(0)}.header.scroll-header[data-hidden=true]{pointer-events:none;transform:translateY(-100%)}@media (prefers-reduced-motion:reduce){.header.scroll-header{transition:none}}