.sentinel{height:1px;width:100%}@supports selector(:has(*)){html:has(#top-sentinel:not(:in-view)) .site-header{-webkit-backdrop-filter:blur(41px);backdrop-filter:blur(41px);background:linear-gradient(180deg,#f4f9ff99,#d0e9ff99)}html:has(#top-sentinel:in-view) .site-header{-webkit-backdrop-filter:none;backdrop-filter:none;background:transparent;box-shadow:none}}@supports (animation-timeline:scroll()){.site-header{animation:header-bg linear both;animation-range:0 1px;animation-timeline:scroll(root)}@keyframes header-bg{0%{-webkit-backdrop-filter:none;backdrop-filter:none;background:transparent}to{-webkit-backdrop-filter:blur(41px);backdrop-filter:blur(41px);background:linear-gradient(180deg,#f4f9ff99,#d0e9ff99)}}}html.is-top .site-header{-webkit-backdrop-filter:none;backdrop-filter:none;background:transparent;box-shadow:none}html:not(.is-top) .site-header{-webkit-backdrop-filter:blur(41px);backdrop-filter:blur(41px);background:linear-gradient(180deg,#f4f9ff99,#d0e9ff99)}