@keyframes highlight{0%{opacity:1}100%{opacity:0}}.footnotes li,.footnote-ref{position:relative}.footnotes li::after,.single__contents a.footnote-ref::after{position:absolute;z-index:-1;content:'';top:0;left:0;right:0;bottom:0;background:linear-gradient(-100deg,rgba(var(--color-footnote-highlight),.3),rgba(var(--color-footnote-highlight),.6) 95%,rgba(var(--color-footnote-highlight),.1));opacity:0}.footnotes li:target::after,.footnotes li:focus::after,sup[id^=fnref]:target a.footnote-ref::after,sup[id^=fnref]:focus a.footnote-ref::after{animation:highlight 2s cubic-bezier(.3,0,1,.7)}.single__contents a.footnote-ref{margin-right:3px}.single__contents a.footnote-ref::before{content:''}sup[id^=fnref]::before{content:'['}sup[id^=fnref]::after{content:']'}